my scientific age

Liushugou, electric furnace steel mill.

Two two-roller skew rolling mills are installed here, one for rough rolling and one for finishing rolling. Professor Zhuang, Lin Wan, and Chen Kang gathered here and waited quietly, while the steel mill workers were preparing for rolling according to the instructions.

The rough rolling mandrel is turned, and the diameter is shortened from 60 mm to 56 mm. The rolling process is divided into two steps. The solid billet is heated and extruded by the rough rolling mill to obtain a seamless steel pipe with an inner diameter of 56 mm.

The diameter of the finishing mandrel is 59 mm, and the seamless steel pipe with the inner diameter of 56 mm will produce an internal extrusion effect when passing through the mandrel with a diameter of 59 mm, which is similar to the self-tightening effect of the gun barrel. After this process, the quality of the mortar will be improved. and life expectancy will increase by two orders of magnitude.

The theoretical inner diameter of the seamless steel pipe rolled by the finishing mill is 59 mm, and a high-quality 60 mm mortar tube is obtained by performing a precision machining to remove the burrs on the pipe wall.

Finally, it is up to the customer's needs to decide whether or not to engrave the rifling. The mortar is generally used as a smoothbore gun, but the rifling can also be processed to make it a rifled mortar to improve the shooting accuracy.

This is the seamless steel pipe rolling process formulated by Zhuang Jiao.

In the forging workshop of the electric furnace steel factory, an epic steel symphony is being staged.

More than a dozen workers are manually forging solid billets, and the so-called manual forging is the most original and most passionate way.

A six-and-a-half-meter-high steel frame is erected in the middle, with guide rails on both sides of the steel frame. A square solid steel slider weighing 300 kg is suspended at the top. The slider is connected by two steel cables, which are then connected to the steel frame. The top pulley block extends to the left and right, and the ends are connected to two human-powered winches.

The shape of the whole machine is perfectly similar to the Louis XVI Happy Table, the biggest difference is that one is used for beheading and the other is used for forging steel.

Emmmm…

If you have to use this thing to behead your head, it's actually not impossible.

The hoisting device is manually driven to pull the 300 kg slider to a height of 6 meters, and then put it down for free fall movement. The kinetic energy of a single impact is as high as 5400 joules, so that the forging effect is achieved.

Not to mention, although this manual forging method is simple, it is extremely practical.

Regardless of the forging efficiency, only the impact kinetic energy is concerned, this manual forging press with a 300 kg slider is equivalent to the impact kinetic energy level of a 250 kg air hammer.

The disadvantages are very obvious...

slow.

The frequency of a single strike is about every 20 seconds.

I saw fourteen strong workers turn the hoisting device and quickly drive the [-]kg slider upwards. When the [-]-meter limit is reached, the handle of the hoisting device is released, and the slider falls at a high speed like a meteorite. , just after a few tenths of a second, it slammed into the rectangular steel ingot placed on the surface of the anvil.

"Boom!" A dull and powerful metal crash sounded, and the fiery red steel ingot was instantly deformed. Two forges were one after the other, holding iron pliers and flipping the steel ingot.

In the whole forging process, the rectangular steel nails must be forged into a nearly circular shape, and can be rolled after reheating.

"Who designed this artificial forging press?" Zhuang Qianding asked curiously, looking at the forging press in the workshop that looked like the guillotine of Louis XVI.

"It was designed by Li Qiang during the Guantian General Arsenal, but due to the Long March, it was unavailable at the time. Not long ago, we found the design drawing of this artificial forging press and built it." Chen Kang responded with a smile: "Professor Zhuang, Do you think there is any room for improvement?"

"Only driven manually, this forging press is perfect. If I improve it, I can only change it to electric drive, add a set of transmission devices to increase the torque by [-] times, drive the one-ton slider, and increase the forging efficiency."

Zhuang Qianding responded: "But it takes too much time and cost, and the German-made air hammer will arrive at the base immediately, so there is no need for improvement."

Can be improved, but not necessary.

If there is no German-made machining equipment, it is no problem to modify this manual forging press.

"Boom! Boom! Boom!"

The sound of the metal slider hitting the high-temperature steel ingot in the workshop is continuous. It is as crisp and sweet as a mountain and flowing water, and it is also like the majestic and powerful mountain range. After half an hour, the steel ingot after hundreds of forgings has approached the shape of a cylinder. The workers put it into the stove to reheat.

Since the industrial version is limited to 0.2 and lacks a thermometer, it is impossible to accurately measure the temperature of the ingot, and to what extent the temperature can eventually recover can only be based on feeling.

This kind of feeling is what the workers feel that the temperature is OK--under [-] degrees Celsius, about [-] degrees Celsius.

When the near-cylindrical ingot turns yellow, the forge feels that the temperature is inseparable, takes it out, and sends it to the first two-roller skew rolling mill for rough rolling.

everything's ready.

"Report, the rolling work is ready, please instruct!" Upon seeing this, the director of the electric furnace steel plant immediately raised his hand to salute Chen Kang.

Chen Kang raised his hand in return: "As planned."

The two two-bar skew rolling mills have been debugged. Professor Zhuang personally trained a group of rolling workers for the electric furnace steel mill and compiled relevant production regulations. This rolling is the first rolling test. Once successful, it will enter the trial production link.

"Yes!" The factory manager turned and left.

"Professor, it's about to start." Chen Kang looked forward to the rolling test that was about to start.

From the perspective of the electric furnace steel mill, the success of the first rolling test means that the electric furnace steel mill has the ability to manufacture seamless steel pipes, which is a historic breakthrough compared to the previous situation where only ingots could be cast.

From the perspective of the arsenal, the first rolling test was successful, representing a substantial breakthrough in the biggest technical problem of the 60mm mortar project, and the entire weapon imitation research and development project is about to succeed.

For the Military Industry Bureau, this shows that the Military Industry Bureau is about to have the ability to independently produce 60mm mortars. Compared with the past, Chen Kang can only use the description of 'the Xiongguan Mandao is like iron, and now it is moving from scratch'.

Zhuang Qianding nodded with a smile on his face, and there was also a hint of expectation in his eyes. He wanted to see the final effect of the two-bar skew rolling mill incorporating the technical concept of self-tightening of the artillery barrel.

With the order of the electric furnace steel factory manager, all the electric power supply of the electric furnace steel factory is centralized to ensure the supply of the rolling mill. The rolling group that has already been ready starts the machine, the DC motor with a power of up to 50KW runs, and stays in the groove-shaped rolling table. The tail of the flaming red near-cylindrical billet moves forward slowly under the action of the metal head.

Immediately afterwards, the head of the billet contacts the metal cast iron rollers running at a uniform speed. In an instant, the head is subjected to the reaction force exerted by the upper and lower parts, the shape changes, and the extrusion effect occurs. The surface iron oxide falls off like dandruff, and the billet Moving on, the head of the changing billet is in contact with the conical mandrel, and the solid billet is forced out of a hole under the action of the strong rolling force and the tip of the tail.

Slow and steady.

The metal plug continues to move forward, the two rollers apply pressure evenly, and the entire billet changes from a solid state to a red hollow steel pipe at a speed visible to the naked eye.

After a few minutes, the one-meter-long billet completed the rough rolling process and became a high-temperature seamless steel pipe with an inner diameter of 56 mm.

Due to insufficient power supply, the electric power of the electric furnace steel plant can only maintain the full power operation of one rolling mill, which is very embarrassing. Both the rolling efficiency and the smelting efficiency of the electric furnace are greatly reduced.

For this problem, Chen Kang can't solve it temporarily, and can only temporarily use the current method to start intermittently.

Two millworkers in the finishing rolling group start the machine, and the metal head pushes the high-temperature seamless steel pipe whose temperature has dropped slightly to move forward, touching the cast iron rolls rotating at a constant speed, and the shape becomes more rounded. Then, the most important part comes, the head of the steel pipe touches 59mm diameter mandrel.

Squeeze, deform.

A force is exerted from the inner wall tissue to the outer wall tissue, the inner wall tissue of the steel pipe becomes more dense, and the outer wall is affected by the mandrel shell and cannot move, thus resulting in the self-tightening effect of the body tube.

As time passed, under everyone's attention, the yellow-red seamless steel pipe gradually emerged from the other end of the mandrel, with an inner diameter of 59 mm and an outer diameter of 8 mm.

Seeing this scene, all the spectators around were refreshed.

A few minutes later, the second skew rolling mill was shut down, and the entire finishing rolling process ended. A high-temperature seamless steel pipe with a diameter of 59 mm lay quietly on the surface of the workbench, with a length of about 1.2 meters.

After finishing the finishing process, Zhuang Qianding and Lin Wan, who are the developers, came forward together to carry out the final quality inspection and acceptance of the production process.

If the quality inspection fails, it will mean that the entire seamless steel pipe will be scrapped.

Chen Kang, the director of the electric furnace steel factory, and the other workers held their breaths, and fixed their eyes on Zhuang Qianding, who was the highest technology group.

A total of four rolling workers in the rough rolling group and the finishing rolling group were all nervous and a little uneasy in their hearts. They kept recalling the rolling process just now, for fear of failing the test results.

After a few minutes.

"Professor, how's it going?" Chen Kang asked with concern after Professor Zhuang's all-round inspection of the seamless steel pipe.

"There are no cracks, bubbles and holes on the outer wall of the steel pipe. The inner wall is denser than the outer wall. It basically achieves the self-tightening effect of one-time finishing rolling. The first rolling test was very successful." Zhuang Qianding motioned to Lin Wan on the left to record this time. After the test results, he then faced Chen Kang and announced the results of the quality inspection with a smile.

"Okay! Good! Professor, what should I do next?" Chen Kang heard the words, his face suddenly showed joy, very excited, kept calm, and asked.

The big stone hanging in the hearts of the factory director and the surrounding workers fell, and their faces showed joy. The other two rolling crews finally breathed a sigh of relief, and their hearts couldn't help but feel a sense of happiness and success.

success!

This is a small step for the Liushugou Electric Furnace Steel Plant, but a big step for the base area and the Red Army to produce weapons and ammunition independently!

"Let the workers send this seamless steel pipe to the annealing furnace, anneal it to relieve stress, and then pickle it to make qualified gun barrel blanks and send it to the arsenal."

Zhuang Qianding nodded and arranged in an orderly manner: "In terms of production, we can let two rolling mills enter the trial production stage to manufacture gun barrel blanks in small batches."

The seamless steel pipe that has undergone the finishing rolling process cannot become the mortar pipe blank temporarily, and two processes of annealing and pickling are required. The seamless steel pipe made of electric furnace steel can finally become the gun barrel blank and sent to Arsenal handle.

The barrel blank is produced by the electric furnace steel factory, and the precision machining is in charge of the arsenal.

The billet needs two processes of turning and fine boring, so that the outer wall can achieve a smooth and rounded effect, and the inner diameter can reach 60 mm in length. In this way, a gun barrel blank can truly become a mortar barrel.

Of course, due to the lack of machine tools, machining can only be performed for outer wall turning, and inner wall boring is temporarily unavailable.

"Okay, Lao Liu, arrange a team here to start the production of seamless steel pipes. First, conduct trial production for a period of time to accumulate experience in the production of barrel blanks. The power supply can only maintain the current level for the time being. The power supply reasonably arranges the production tasks of the electric furnace and the two rolling mills, but at least 5 barrel blanks are guaranteed for me every day."

Hearing Zhuang Qianding's arrangement, Chen Kang nodded and turned to look at Liu Cheng, the factory manager beside him. With a serious face, he gave an order: "This is an order!"

"Yes, the electric furnace steel plant guarantees the mission! Old boss, if I don't produce five barrel blanks every day, you will screw my head off!" The emotional factory director Liu Cheng suddenly raised his chest and raised his hand. Salute, roar loudly, revealing a strong iron-blooded soldier temperament.

"I'll use your head as a fart. The most important thing is to find a way to increase the output of steel tube billets. Send this billet to the annealing furnace first." Chen Kang smiled and shook his head.

At this moment, a communications soldier hurriedly entered the electric furnace steel plant, came to Chen Kang's side, and raised his hand to salute: "Report to the head, the General Affairs Section has an urgent call."

When the words fall, hand over the telegram.

Chen Kang took the telegram and opened it to read it. When he saw the content, his face was filled with joy again, and he forwarded the telegram to Zhuang Qianding: "Professor, the German-made machine tools and equipment have arrived in Linfen, and the general affairs department will be transported in three batches. , The first batch has passed through Matouguan, there are nine lathes, boring machines and milling machines, and it is expected to arrive at Liushugou in 24 hours."

"24 hours?"

Hearing the words, Zhuang Qianding quickly took over the telegram and read it. After seeing the content with his own eyes, he was relieved, and an idea came to his mind, and he said to Chen Kang: "Director Chen, I think the equipment reception work should be carried out immediately. The mechanical processing workshop of the Liushugou Arsenal was expanded into the Liushugou Machinery Manufacturing Factory. In the early stage, a set of various types of machine tools and air hammers were laid, and the other two sets of machine tools and air hammers were sealed up. After the personnel are trained and the processing technology is mastered, the stalls will be spread out.”

"Okay, just follow your plan." Hearing this, Chen Kang nodded without hesitation.

"This period of time can be regarded as waiting for the rice to cook. Without these machine tools, it would be difficult for the industrial stalls in Liushugou and Yulin to operate." Zhuang Qianding smiled and sighed softly: "I don't know if there are any in Yulin. looks."

"There is no news from Yulin for the time being. Four days have passed, and he should have news soon." Chen Kang said.

"Forget it, don't care for the time being, what should come will always come, let's get things done on our side first."

Zhuang Qianding shook his head, his eyes shining brightly: "As soon as the equipment arrives, we will start to manufacture the air separation equipment and oxygen lance. If nothing else happens, the construction time of the test furnace originally scheduled for two and a half months will be shortened to Within a month to a month and a half.”

The construction speed of the oxygen top-blowing test furnace depends not only on capital, space and personnel, but also on the air separation plant and the three-hole oxygen lance as the core device.

The latter is almost the deciding factor.

Although the arrival of this batch of German-made machining equipment was a little bit later than expected, it was not too late.

Now, the machinery manufacturing factory on his side can be established immediately to support the operation of the entire Liushugou Industrial Zone, but he just doesn't know what the situation is on Yu Hua's side.

……

In the afternoon, the sky was dark, and the two and a half days of torrential rain ended, but it turned into a drizzle.

If he didn't come to the north, Yu Hua really didn't know there was such a place where there would be so much rain, breaking the fixed impression of the arid desert in the north.

"I really can't find a place..." Standing on a high slope, Yu Hua looked around, the right side was the rolling Hengshan Mountain, and the left side was the rolling hills. Although the sky was raining lightly, the surroundings were still the same. There is no ideal place.

Not anywhere!

Over the past few days, he has traveled almost all over the surrounding area of ​​Yulin on horseback, no matter in the northeast direction or the opposite northwest direction, inspecting the surrounding terrain of Yulin in an all-round way. There is no place.

Huangfu River, Tuwei River, and the upper reaches of Wuding River have all been to the mountains and rivers. There are many conditions that are not suitable for the factory site. Some rivers are too small and can only be used for farmland irrigation. .

Some rivers and streams are too far away from Yulin, and the personnel and transportation are extremely inconvenient, which is too far from the original idea of ​​the Yulin Iron and Steel Plant.

In addition to the river, Yu Hua also specially rode to Hongjiannao, which the Mongolians called the lake of the gods. This is the largest desert lake in Chinese history. It was formed from the accumulation of excessive rainwater. The water storage capacity is as high as [-] million cubic meters, which can easily meet the needs of the steel plant.

however……

This place is located on the south side of Ikezhao League, forming a triangle with Yulin and Shenmu. The surrounding area is mostly desert, the natural environment is too harsh, and the road conditions are extremely poor, making it impossible for people and animals to pass.

"Comrade Xiang, where are we now?" Exhausted from running around for several days, Yu Hua put down his binoculars, took a sip of the rainwater that had been boiled at high temperature, and turned toward Xiang Yuan, a soldier of the First Red Division who was eating jerky beside him. , asked.

"Sir, we are in Shajing, which is from Yulin Baili Road, Shenmu Ninety Mile Road, and fifty miles to the southeast. This is the Tuwei River you have been to before." Xiang Yuan responded.

Xiang Yuan is from a local herdsman. He is a rare Mongolian warrior in the First Red Division. He is strong and very familiar with Yulin and the surrounding areas of Ikezhao League. He studied in the night school opened by the First Red Division and has outstanding cultural achievements.

With well-developed limbs and a simple mind, it is not suitable for Xiangyuan.

The name Xiang Yuan was coined by Chen Kang after he took the first place in the night school exam of the First Red Division.

"Probably between Yulin and Shenmu..."

Yu Hua nodded, his mind was spinning at a high speed, forming a high-precision digital map, marking the name of the manhole and geographic data, after processing, turned to look at Lu Junyu, who was clearly turning black: "Comrade Lu, are we out on the sixth day? already?"

"If we start from Yulin, it is indeed the sixth day. If we start from Yancheng, it is the seventh day." Lu Junyu responded.

"The seventh day... That's all, it's not that I don't want to look for it, but I really can't find a good place. Sanchawan is a good place. The Yuxi River and the other two rivers form a lake, and it can be repaired a little. With a stable water supply, thermal power plants can also be built here in the future.”

Hearing this number, Yu Hua shook his head lightly, an inexplicable sense of frustration emerged in his heart. After a few days of busy work, there was no gain. This feeling was really uncomfortable. He took a deep breath and thought calmly.

For now, the Sancha Bay area is indeed the most suitable area around Yulin. The supply of three rivers can not only meet the needs of the pilot furnace and the steel plant in the early stage, but also meet the expansion of the steel plant and the thermal power plant in the middle and later stages.

Many people traditionally think that thermal power plants do not need water. This is a wrong perception. Thermal power plants not only need water, but also large water consumers. Whether it is a thermal cycle, a condensation system, or an evaporation system, all of them need water as a medium.

The choice of a location is not something that can be decided by simply pointing at the map.

Yu Hua has to think about the present, and he has to think about the future as much as possible.

As for environmental protection...

Don't think about it for the time being, think about living first, and then discuss environmental issues.

Now, after the actual investigation and test, Yu Hua can come to a conclusion that except for Sancha Bay, it is not suitable to build iron and steel plants and thermal power stations around Yulin.

"Comrade Lu, power generation in Yancheng, and the inspection mission is officially over. There is no suitable site for the plant around Yulin. After careful consideration, the Sancha Bay in the south of Yulin City is chosen as the location of the steel plant and future thermal power station." Yu Hua weighed and thought. After finishing, with clear eyes, he looked at Lu Junyu and said sternly.

"Yes!" When Lu Junyu heard these words, he was stunned for a moment, then he reacted immediately and understood what Yu Hua meant.

"It's been seven days since I came out. It's time to go back. Besides, this feeling of not getting what I want is also a reminder to me."

Yu Hua looked at the most primitive and clean natural beauty around him, and his heart was quiet, whispering softly.

"Perhaps, I can not only use the bloodletting plan, but also use the future authority and the foresight brought by these advanced knowledge in my mind to guide or induce them to fall into the wrong direction of technology, or call it a technological trap, which consumes a lot of time. and resources to seize opportunities.”

"A recurring and practical conspiracy, the most famous is undoubtedly the Star Wars program, with low cost and high return, can be used in some important fields, assuming that the Japanese are equipped with jet fighters in advance, with the performance and performance of jet fighters and What's the impact on fuel consumption?"