my scientific age

Chapter 192 Life is like a drama, it all depends on acting skills!

Inside the first brick house.

"This is the basic principle and main advantages and disadvantages of submerged arc welding. The advantages are high efficiency, no arc light, large melting depth, high welding quality, sufficient metallurgical reaction time between metal and flux, high strength, and fewer weld pores and welds. Cracks and other defects, it is very suitable for welding of high-strength pressure vessels and boilers, suitable for getting started and has a wide range of applications.”

The submerged arc welding operation training theory class is in progress. Yu Hua holds a chalk in his right hand and writes the basic principles, advantages and disadvantages of submerged arc welding on the blackboard: "The main disadvantage is that the welding process is generally suitable for flat positions, and other parts require special measures. It is guaranteed that the granular flux covers the welding surface without falling, and in addition, the condition of the arc and the welding part cannot be directly observed.”

A semi-automatic welding machine with industrial aesthetics and a funnel device is placed in the center of the yard. This is the real protagonist today. It is worth more than 1000 yuan and quietly exudes the unique temperament of cutting-edge welding technology in the 30s .

Elegant.

There are many welding technologies that surpass submerged arc welding in history. However, in the current era of 1937, submerged arc welding is the most advanced and cutting-edge welding process.

If it weren't for Johnson, an American businessman, he might not be able to buy this stuff.

There are two silver-white stainless steel plates next to the submerged arc welding machine. Below is a group of welders sitting on small benches. All the welders have straight backs, bright eyes, and holding a pencil in their right hand, constantly recording what Yu Hua wrote on the blackboard. knowledge points.

This group of welders is not a group of middle-aged people as imagined. On the contrary, the oldest among them is only 26 years old, the youngest is 20 years old, and the average age is about 23 years old, which is extremely young.

On top of that, these people had an average of an upper primary school degree, and one of them even had a junior high school degree.

Everyone was attentive and listened carefully. There was no disrespect to Yu Hua, who was a teacher.

Although Yu Hua is young, his air of mature scientific research worker overwhelms everyone.

"Have you written it down?" Yu Hua asked everyone after explaining the theoretical knowledge about submerged arc welding.

All the young welders nodded their heads in succession. As the 'highly educated' in the Republic of China, with an average senior primary school education, their ability to learn and understand far exceeds that of the old welders.

Older welders are more experienced, however, they are far less able to accept new technologies than younger ones.

To be fair, Yu Hua didn't know where Jin Yu went to find these highly educated welders. He thought that it would be good to find a group of old welders. Before class, he was prepared to be sold by the other party to get rid of his qualifications.

As a result, in class, these young welders were like three good students, and they were outrageously well-behaved.

Everyone nodded and said to take note.

"These are the basic parameters of the SAW102 submerged arc welding machine. The rated voltage is 380V, the welding current adjustment range is 60A-100A, the load duration is 20%, the power is 8kW, and the three-phase power supply is used..."

After getting the answer, Yu Hua took it with his right hand and explained the basic parameters according to the flux manual.

"The welding standard is: the shape and size of the weld meet the design requirements, the surface is smooth and tidy, and there should be no defects such as pores, slag inclusions, cracks, incomplete penetration and welding flashes inside, and the operation process must meet the specifications for machine use."

"The operation techniques are divided into three categories, butt straight weld, butt annular cold wind, and fillet weld. The welding methods are divided into two basic types, single-sided welding and double-sided welding, which are subdivided into single-layer welding according to the thickness of the steel plate. Welding, multi-layer welding, and single-layer welding are well understood. One-time welding is enough. Multi-layer submerged arc welding is mainly for thicker steel plates. Since it cannot be welded at one time, multi-layer welding is used. The principle is similar to building walls, and each layer is guaranteed to be welded. Through, to avoid cracks, the weld joints are staggered and cannot be overlapped, this is the schematic diagram of multi-layer welding..."

The theoretical course of submerged arc welding operation training was very successful. The reason for taking the theoretical course instead of going directly into the practical operation is because Yu Hua hopes that these young welders "know what it is and why it is". From a theoretical perspective Only by understanding the basic principle and operation process can the upper limit of welding technology be improved.

Submerged arc welding is easy to get started, but not easy to master.

The eight-way organization behind Lin Wan wants to mass-produce and manufacture Yu's Seven Pagodas and build a sulfuric acid industry without the support of the submerged arc welding process, and it is inseparable from a group of welders who have mastered the qualified submerged arc welding process.

In fact, if Yu Hua guessed correctly, the group of welders with advanced primary school education in front of them most likely belonged to the members dispatched by the organization.

Seeing through but not revealing, Lin Wan didn't take the initiative to reveal her identity, and he wouldn't take the initiative to expose it.

Sometimes people don't cherish things that are easily obtained.

Appropriate restraint is necessary to fully demonstrate your worth.

Life is like a play, it depends on acting.

At the gate of the yard.

The lightly closed door revealed a gap. A man who had recently visited Liucun stood at the door. He quietly looked at the scene in the yard. He was dressed simply and neatly. Stars, revealing a refined atmosphere.

The theory class in the yard has already been completed. As Mr. Yu Hua, he signaled a student to come to the stage, and then personally demonstrated how to operate the semi-automatic submerged arc welding machine and laying flux and other preparations. This is the actual operation link.

After all the work was ready in the practical operation, Yu Hua controlled the welding torch and welded two stainless steel plates with skillful and natural craftsmanship under the watchful eyes of the public.

The dazzling arc light in the past disappeared, replaced by a bright red and hot weld like magma. The metal in the weld continuously flows under the action of high temperature, fully reacts, and realizes the combination at the atomic level.

In a short time, the two stainless steel plates were welded.

After the demonstration in person, Yu Hua found two stainless steel plates again and signaled the students to operate. The No.1 submerged arc welding student had a serious face, took the welding torch with both hands, and started welding under Yu Hua's careful guidance.

The working sound of the semi-automatic submerged arc welding machine is constantly coming out, which complements the sound coming from the diesel generator set, playing a hymn belonging to the industry.

Time passed, and under the careful guidance of Yu Hua, student No.1 successfully completed the welding. After inspection, the welds met the standards and the surface was smooth and clean.

"Theory and practice go hand in hand. This class is very good. It can be seen that Yu's knowledge level is very high." The elegant man looked at the students who had successfully mastered the submerged arc welding process in the yard, nodded lightly, and his eyes were full of The color of appreciation, commented.

"Student Yu has always been like this. What he advocates most is 'know the truth and know the reason'. Only in this way can the welder be fully understood. Even I have to admire the high moral character of the student." Liu Wei, the top person in charge, was standing aside at the moment, his gesture faintly showing a sense of respect, and he said to the elegant man.

Hearing this, the elegant man nodded, gently closed the door with his right hand, motioned to keep quiet, not to disturb the class, and pointed to the big locust tree not far away.

Liu Wei understood and left quietly, and the two walked towards the big locust tree in the village together.

When the sun went down, the sky was full of red clouds, and the afterglow fell on the two of them.

"I came this time, firstly for the situation in the north, secondly for Yu's Seven Pagodas, and thirdly for Yu Hua's classmate. Of course, there is still a surprise, high-yield wheat, it seems that God is really favoring us. As soon as I arrived in Liucun, there is such a big piece of good news waiting for me."

The elegant man walked steadily and powerfully, looking at the sunset in the distance, and said with a smile: "Comrade Liu, how is the progress of the Seven Pagodas of the Yu Family?"

"Comrade Commissioner, thanks to the research and development team founded by Yu Hua, the research and development of Yu's Seven Pagodas is progressing quite smoothly, the design drawings have been completed, the design stage is basically over, and now it is the manufacturing stage, as you can see with your own eyes, Yu Hua is burying Arc welding theory class, training submerged arc welding students, used to manufacture core containers." Liu Wei heard and reported the recent situation of Yu's Seven Pagodas.

(End of this chapter)