The Rise of Heavy Industry 1980

When she returned to the dormitory, it was already more than seven o'clock in the evening, Zhang Miaomiao soaked her feet in a basin of hot water as usual, then made a cup of brown sugar water, and then sat by the window in a daze.

You can see the location of

the office along the window, and the lights are on? The office is shared by her and Wang Chaoyang, what is that guy doing at this point?

With questions, Zhang Miaomiao wiped her feet, put on her cotton clothes again, wrapped her neck, and left the dormitory. When she walked outside the office door, Zhang Miaomiao deliberately slowed down and gently pushed the door in. This guy didn't come home in the middle of the night, and Zhang Miaomiao was curious about what he was doing.

Wang Chaoyang was lying on the table and was writing something, very focused, he didn't notice that someone entered the house, and he didn't even notice that Zhang Miaomiao walked behind him.

He didn't find it, Zhang Miaomiao didn't make a sound, and at this time Zhang Miaomiao could already see what Wang Chaoyang wrote.

It was a picture, with a horizontal and vertical coordinates, the vertical axis was the temperature, and a symbol was written under the horizontal axis, but Zhang Miaomiao couldn't see what it was. Within the range of the horizontal and vertical coordinates, Wang Chaoyang has already drawn some broken lines, and some symbols have been marked on the inflection points of the broken lines, but Zhang Miaomiao still can't understand them.

Wang Chaoyang's pen has never stopped, writing words and some characters on the paper, occasionally needing to think about it before writing, but he has never found anyone on the back.

Zhang Miaomiao deliberately didn't let Wang Chaoyang know at first, but then she was attracted by what Wang Chaoyang painted, she learned through text information, it seems to be related to the heat treatment of steel, there is a faint law, Zhang Miaomiao tried to find the law, but he didn't know the essentials, so Zhang Miaomiao unconsciously fell into deep thought.

So a strange scene happened, two people in the office, one standing and the other sitting, neither of them made a sound, only heard the pencil on the paper "sizzling" the sound of writing.

"Oh! I see!" At one moment, Zhang Miaomiao suddenly spoke.

This sudden sound frightened Wang Chaoyang to lean back, the chair flew out, and Wang Chaoyang was lying on the ground with a grinning expression on his face.

"Miao Miao?!Are you trying to scare me to death...... "

Uh...... I'm sorry. Zhang Miaomiao sincerely apologized. She really didn't mean to.

"Ah...... Why is there no feeling in my waist, from the waist down? Isn't it paralyzed?" Wang Chaoyang said loudly.

"Oh no, how can you be paralyzed, you don't feel at all?" Zhang Miaomiao panicked.

"Yes, I'm completely unconscious, it's over, I'm really paralyzed, what will I do in the future!" Wang Chaoyang's expression was extremely painful.

Zhang Miaomiao said that she was just a girl in her twenties, who had ever encountered such a thing, she was directly frightened and cried, and apologized to Wang Chaoyang while crying.

Seeing that the girl was crying more and more, Wang Chaoyang hurriedly stood up and said, "Don't cry, don't cry

, I'm kidding you, I'm fine!" Zhang Miaomiao wiped away her tears, looked at Wang Chaoyang, who was standing opposite, and jumped to her feet angrily: "Wang Chaoyang, you are too much, I won't pay attention to you anymore!"

Wang Chaoyang also knew that the joke was a bit big, and it took a lot of words to apologize, and finally had to change the topic and ask: "You don't sleep in the middle of the night, what are you doing in the office?"

Zhang Miaomiao was still angry and said, "What are you doing?"

Wang Chaoyang said: "I'm drawing an iron-carbon phase diagram."

Zhang Miaomiao glanced at the picture on the table and said, "This picture is called the iron-carbon phase diagram?"

Wang Chaoyang nodded and said: "Test you, through this picture, what conclusions can you get."

Wang Chaoyang said this deliberately to ease the atmosphere. And it turned out that this trick was quite effective, Zhang Miaomiao's attention returned to the diagram, and after thinking seriously for a while, he said: "This diagram is a diagram of the relationship between temperature and steel, in my opinion, it should be related to heat treatment, right?"

"Smart!" Wang Chaoyang praised sincerely.

The iron-carbon phase diagram is the knowledge of later university undergraduates, which is a summary and induction of the changes in the internal crystalline structure of metals at different temperatures. It can be said that in the field of metallurgy, steelmaking, and heat treatment in later generations, the iron-carbon

phase diagram was an indispensable tool! On the way back to Hongxing in the afternoon, Wang Chaoyang learned that Zhang Miaomiao's knowledge of heat treatment was weak, so he deliberately returned to the office to make an iron-carbon phase diagram.

"One picture can encompass all the changes in steel?" Zhang Miaomiao said in surprise after listening to Wang Chaoyang's explanation.

"yes. The so-called iron and steel is actually the ratio of iron and carbon, which is ever-changing. Wang Chaoyang said.

And ...... And you specially drew this picture for me?" Zhang Miaomiao's voice suddenly lowered.

"Yes, this diagram is more intuitive and useful to you. Wang Chaoyang said.

"Thank you...... Thank you!" Zhang Miaomiao's voice lowered.

......

The order handed over by Longyuan Heavy Industry to Sanhe Machinery is divided into six kinds of gears, and after more than ten days of hard work, five of them have determined the improvement plan.

The last one is a heavy-duty gear, with a gear width of 55 mm, a large modulus and a small number of teeth, which seems to be used in the gearbox input gear.

Heavy-duty gears have particularly strict requirements for tooth shape and tooth surface hardness, which has also become the last problem Wang Chaoyang and they face.

However, although it is a problem, it does not mean that there is no solution. Wang Chaoyang and Zhang Miaomiao take the approach of collecting raw data and then seeking the optimal parameters, so theoretically speaking, any problem can be solved, as long as there is enough time.

In order to solve this last problem, they tried to make more than 20 gears, each gear measured more than 20 data, and the recording of these data used up most of Zhang Miaomiao's book.

After finding the optimal parameters for heavy-duty gears, Wang Chaoyang began to focus on the hardness of the tooth surface. The hardness of Longyuan Heavy Industry is between 55 and 60 on the Vickers scale, and in order to accurately control the hardness, Wang Chaoyang began to use the hot furnace of Sanhe Machinery to make samples.

Like a gear, Wang's plan is to accumulate data through a large number of samples, and then find the optimal parameters from them.

Wang Chaoyang didn't do this kind of thing himself, because he didn't want to go to the heat treatment workshop to do a sauna in the winter. Explain the method and the data that need to be recorded to Zheng Xiaoshan, and then the director's son will help them complete everything.

These data include furnace temperature peaks, holding time, cooling rate, cooling temperature, and most importantly, workpiece hardness.

The accumulation of heat treatment parameters is much more difficult than that of gear parameters, so Wang Chaoyang originally planned to spend a week collecting basic data. What he didn't expect was that Zheng Xiaoshan worked in the style of a desperate Sanlang, and he stayed up all night for three consecutive days, and he insisted on accumulating all the parameters listed by Wang Chaoyang.

"Don't die!" Looking at Zheng Xiaoshan, who was shirtless and smiling with soot on his face, Wang Chaoyang couldn't help but scold.

"What are you afraid of, it'll be fine if you sleep!" Zheng Xiaoshan said.