It's another morning.

Lin He and Zhou Bingguang first went to the heat treatment branch to see the transformation of the heat treatment furnace, and then went to the foundry branch to see the mold workers modeling according to the drawings.

A few old masters were impatient, but they couldn't scold him.

Lin He is very smart and does not point fingers.

Shengda is a foundry, and the most important thing is to have skilled mold workers.

There are hundreds of people in the foundry branch, mold workers, sand workers, modeling workers, etc., who have worked for ten years, and some who have worked for more than 20 years, and their craftsmanship is 18 streets stronger than Zhou Bingguang's mouth cannon that can only say that he can't do it.

Don't worry about him.

At most, supervise the process and you're done.

After a week, the rare earth raw materials and reagents were purchased first.

The smelting branch prepares the charge, and waits for the furnace to be opened.

Lao Zhang came to the smelting branch and personally held a mobilization meeting in the small conference room of the smelting branch.

In addition to the factory leaders, there were also leaders of a branch factory, heads of departments, production line team leaders, etc., and even two furnace workers were called over for a meeting, sitting in the corner and not daring to come out.

Lao Zhang spoke, and then other factory leaders also spoke.

These leaders understand the metallurgy of a ball.

After talking nonsense, he finally asked Lin He, the actual commander-in-chief, to speak.

Lin He did not have stage fright, raised the test list in his hand, and pointed to the thorn and said the problem: "According to the test results, there are some problems with the raw materials purchased by the procurement department, first of all, 20 carburized steel, C0 is only 1.6, which does not reach the lower limit standard of 1.8, P>0.32, which is also exceeded, 40Cr's σs/MPa is less than 785, and Aku2/J is only 45......"

The head of the procurement section is getting darker and darker, this.

No face at all.

The raw materials on the market are like this, and you can also blame yourself for this?

Lin He didn't make a draft, looked at the test report and casually pointed out a bunch of problems with the raw materials that were purchased.

The faces of the leaders were different when they heard this, and they all looked sideways.

Some are surprised that this kid has a solid foundation and understands a lot of things, and some are surprised that this kid has a good psychological quality, and he has no stage fright in front of so many leaders, and he doesn't give face to the procurement department at all, and he even has a good show.

After hearing this, Zhang Zhenguo looked at the chief of the procurement section: "What are you eating?" ”

The head of the procurement section was also very aggrieved: "This is already the best raw material that can be purchased." ”

Zhang Zhenguo didn't train him again, this is indeed the truth, and he also knows in his heart, metallurgical raw materials are relatively deep, how can there be so much that everything is up to standard, just look at Lin He: "Can it be used?" ”

Lin He said calmly: "It can be used, we are just trial production, and the requirements do not need to be too high, but if the quality of industrial products is to be excellent, we must strive for excellence in all aspects, why do the devil's engines not need to move a screw for 20 years, processing and assembly technology is very important, and the material is the most critical, which must be known to all leaders." ”

The leaders all nodded, knowing that it was the truth.

Zhang Zhenguo hummed and said, "Let's try it out first and see if it's going to be said." ”

Lin He said yes and began to arrange the task.

In fact, there is nothing to arrange, and he doesn't need to say much about how to smelt steel.

These people at the grassroots level have been working for decades, and all of them are experts.

He just talked about the process and process control, these things are written in the process documents, the people in the smelting branch have studied it many times, and now they just sort it out again, and by the way, emphasize the importance of process and process control.

Needless to say, the importance of process control is well known.

With the same raw materials, the properties of the materials cast by two different people may not be the same.

Zhang Zhenguo has been engaged in casting for more than ten years, how can he not understand this, so after Lin He finished speaking, he emphasized again: "Hear it, this furnace steel must be strictly implemented in accordance with the requirements of the process documents, and must not be implemented indiscriminately!" ”

Everyone naturally agreed, who would dare to go against it?

After the meeting, the furnace steel officially began.

A cadre moved to the scene, and more than 20 people stood and watched the workers work.

Shi Jianfeng also stood aside, not overstepping the command.

The workshop director also stood aside, not daring to command blindly.

The site has been cleaned and processed in strict accordance with the requirements of the process documents.

Even the ground is sprinkled with water, and it is true that there is no dust when smelting the steel.

A team leader in his twenties took a few jobs and began to inspect the steel before smelting.

Lin He asked, "How long is the oven?" ”

The team leader said: "It's been two hours. ”

Lin He nodded, and emphasized again: "The opening of the new furnace must be carried out in strict accordance with the requirements of the baking process, and the baking time of the furnace lining must be greater than two hours, only more, not less, this is not only to avoid reducing the life of the furnace lining, but also to ensure the stability of the chemical steel smelting process, your previous operating procedures should also have requirements, right?" ”

The team leader nodded, a little impatient, but didn't dare to scold him.

The leaders are watching from the sidelines!

This is the basic operation, who still knows, which uses your nonsense!

The team leader sneered and took the workers to carefully inspect it.

Make sure there are no problems, and then instruct the workers to weigh the divided charge.

Lin He glanced at it, and began to point out the country, this kind of opportunity is not much, pointing to the big name and saying to the leaders: "This scale also has to be changed, it is best to change the electronic measurement scale, the accuracy of this large scale can not be guaranteed, sometimes the difference of one or two catties can not be seen, but in the metallurgical industry, the difference is a thousand miles, and the performance of the alloy plus half and two casts will be different, let alone one or two catties." ”

The leaders are very unhappy, everyone has been working for decades, how can this simple truth not be understood.

Still use your hairy boy who hasn't grown all of your hair to preach?

But the leaders were humble and decided not to bother with him for the time being.

If the engine can't be prototyped, it will be counted together.

Director Zhang is not happy, but he is a leader, and there is no shortage of people, as long as it comes to the point, Zhang Dachang Factory can still accept it with an open mind, so he glanced at the new equipment chief: "Turn around and replace it immediately." ”

What else could the equipment section chief say, he could only agree.

"Now loading the stock?"

The team leader weighed the charge, but didn't dare to put it in directly, so he asked for instructions.

Lin He didn't give in, and he didn't ask the leaders, so he directly gave orders: "Pretend!" ”

The team leader looked at the leader again, and the workshop director next to him had a dark face.

Look at what Lao Tzu is doing, I don't see a bunch of leaders here, how can Lao Tzu give orders.

Director Zhang snorted: "Pretend!" ”

The squad leader hurriedly agreed, and led the workers to load the charge with a hanging plate.

Charging is also particular, long materials, large pieces of material must be erected into the furnace, can not be tiled to cause the phenomenon of bridging, tubular scrap steel into the furnace, the upper mouth of the pipe should be towards the direction of tapping, not allowed to operate in the direction of someone and so on.

The charge is divided and cut, and the loading is not troublesome.

The workers quickly put it on and asked for instructions again before starting the heating.

The following process is relatively long, and it is impossible for the factory leaders to wait all the time, and leave after a few words.

The branch leader sent the factory leader away and came back to the scene to star.

Testing the engine is the top priority at present, and in any case, the attitude must be taken seriously.

If the factory leaders feel that they don't pay attention to it, the training will be light.

The leaders of the branch have struggled for decades, and these truths are still understood.

But the team leader was a little under pressure, but he didn't dare to say it yet.

You can only be careful and try not to make mistakes.

This intermediate frequency furnace is too old, the inverter controller burns silicon, and the capacitor also has a bulging belly, which has been overhauled before, but the baking time cannot be shortened, almost two hours.

Lin He chatted with the branch leader for a few words, and there was nothing to talk about.

When the charge melted, the team leader asked again: "Do you want to take a sample now?" ”

The leaders of the branch all looked at Lin He, obviously not planning to give orders.

Lin He didn't dare to command blindly, he forced two sentences on theoretical things, but this kind of practical operation is not something he can blindly command, when the sampling is appropriate to be determined according to the smelting situation of the charge, and the team leader on the front line in this regard is the most professional.

A layman can lead an insider, but that doesn't mean he can command blindly.

Lin He was very polite: "You can take it if you think you can, you are professional in this area, you don't need to ask me." ”

The team leader was quite surprised, thought about it, and decided to wait.

After observing for a while, it was not until I felt that I could take a sample, so I asked people to come forward and take a sample.

The samples taken were taken away by laboratory technicians.

Everyone continued to wait.

Lin He looked at the furnace cavity from time to time, the intermediate frequency furnace steelmaking belongs to the backward process, and the pursuit of efficiency is made by converter steelmaking, and the foundry still uses this small intermediate frequency furnace in the sixties to smelt, not to mention the advantages, the disadvantages are obvious.

The number of smelted steel liquid crystal cores is small, and the degree of supercooling and the tendency to whiteness are large.

The morphology of graphite is also unstable, with more D-type and E-type graphite, less A-type graphite, and less pearlite content.

There are a bunch of shortcomings such as large internal stress and crack tendency of castings.

After waiting for half an hour, the test results came out.

Lin He glanced at the test report a few times, and the phosphorus did not exceed the standard, so he breathed a sigh of relief first.

If the sulfur is excessive, you can still find a way to remove sulfurization, and if the phosphorus exceeds the standard, it can only be treated in separate furnaces, which is the most troublesome.

It's good if it's not over.

I looked at the other chemical compositions, and the previous test results were a little different, which was also a normal situation, and I calculated it on the spot for a while, and then I explained to the alloy worker waiting on the side: "Add three catties of pig iron, half a catty of ferrosilicon and six taels of manganese alloy." ”

The alloy worker agreed, and hurriedly went over to weigh the material.

Weigh the amount and ask, "Do you want to add it now?" ”

Lin He glanced at it a few times, a little uneasy: "Is this accurate?" ”

The alloy worker said: "There is no problem, I weigh the material every day, and I can't feel it." ”

"Then add it!"

Lin He was a little helpless, he didn't doubt this.

After weighing things for a long time, you can really practice this skill.

But the problem is that everyone can make mistakes, and small-scale experiments are fine.

Large-scale industrial production, if you still rely on a pair of hands to weigh, it is.

But now there is no more accurate electronic scale, and it can only be settled.

The smelting time is relatively long, and the branch leaders and workshop leaders have been waiting for hemp.

Lin He's legs were numb and he had to move around.

Watching the workers pick up the slag and release the slag, they don't command randomly.

At 1 hour and 53 minutes, the team leader felt that the steel could be produced, and after asking for instructions again and getting confirmation, it began to be baked.

The reddish molten steel is loaded into a ladle and transported to the foundry for casting.

Lin Hipa did not stop, and followed to the foundry branch.