Chapter 178: The operation was as fierce as a tiger, and a new plan was released
The exchange between Zuo Guangsheng and Ji Hua did not produce any results after all.
The problem that has troubled Shougang for so many years has not been solved. It would be too unreal if it was solved after a simple discussion.
In the end, Ji Hua left Shougang feeling a little depressed.
“Old Ji, we still have to be more proactive about this matter.”
"Wasn't 4MT designed by Assistant Jiang from the Capital Automobile Factory before?"
"The fact that he can design such a complex gearbox at such a young age shows that the technology is very strong. I don't think you can anymore. Go find him and see if there are any additional solutions? "
Ji Hua said before about the impact of the incident, so Li Nanhai is now very active in improving the problems encountered in the Hummer project sample testing. positive.
This is related to the future of the Capital Gear Factory.
“It’s definitely okay to try to communicate, but Assistant Jiang’s ability to design 4MT is already considered an abnormal talent, and it has brought everyone a big surprise.”
"If we need to readjust the design of the gearbox, he can certainly give a lot of advice."
"But this time there is a problem with the bearing steel, and what he can help may be limited."
Ji Hua felt that it was necessary to lower Li Nanhai's expectations, otherwise others would think that he and Jiang Hui didn't work hard enough.
It is still very common in real life that a grain of rice is favored and a rice is hated.
“That’s not necessarily the case. The high-strength automotive steel plate that Shougang had been unable to solve before was finally solved after Jiang Hui’s deep involvement, wasn’t it?”
Although the biggest beneficiary of high-strength automotive steel plates is Professor Zou Yuan of the Capital Institute of Iron and Steel, Jiang Hui, a well-digger, is also well-known in the industry.
As the director of the Capital Gear Factory, Li Nanhai is naturally very well-informed.
He is very aware of all the things happening on the Automobile Industry Street.
"That's true. Assistant Jiang has done in-depth research on high-strength automobile steel plates, so it seems reasonable to know some technologies related to bearing steel."
"After all, they are all It belongs to the research scope of the Department of Iron and Steel Metallurgy ”
Ji Hua originally didn't expect much to go to Jiang Hui for advice, but now that he was talking to Li Nanhai, his interest was piqued.
If the technical problem of bearing steel is solved soon, then the Capital Gear Factory will definitely enjoy great benefits.
The performance of their gearboxes can even be improved to a higher level.
"You should put aside the matters in the factory first. The first priority is to have a good communication with Jiang Hui."
After Li Nanhai said this, Ji Hua did not intend to be in the factory. If you continue to stay, go to the Capital Automobile Manufacturing Plant to find Jiang Hui.
Fortunately, the distance between the two factories was very close, and Ji Hua soon appeared in Jiang Hui's office.
It was a coincidence that he came here. Jiang Hui was busy writing some information related to the improvement of bearing steel technology.
Ji Hua wants to communicate, there is no problem at all.
“In response to the problem that Shougang’s existing bearing steel cannot meet the requirements of the Hummer project, the Capital Institute of Technology is preparing to join forces with the Capital Steel Institute, Shougang and your factory to set up a multi-department joint research team to improve the bearing steel. The material ratio and some processing parameters are also adjusted, and the heat treatment process of the bearing is also adjusted."
"Ultimately, we can improve the performance of our bearings to meet the requirements of the Hummer project."
As this matter progresses, there will definitely be no way to kick the Capital Gear Factory away.
After all, they are the ones producing the current 4MT. It would be a waste of time to build a new gearbox factory.
In this case, Jiang Hui simply stopped talking about it and had a good discussion with Ji Hua about his next ideas.
Hearing what Jiang Hui said, Ji Hua became very excited.
He had also approached Jiang Hui before, and they were relatively familiar with each other.
Now that Jiang Hui can solve their problems at a critical moment, it is definitely a big help.
"Our factory is definitely fully cooperating with the project team's various work arrangements. If there is anything that needs our factory to do, Assistant Jiang, just call me."
If it were someone else. Saying the same thing, Ji Hua would definitely not think that the other party could handle the bearing steel matter.
But it was Jiang Hui who said this, so he was very confident.
In his opinion, if Jiang Hui can't handle this matter, then no one in China can handle it in a short time.
Even experts like Shougang's chief engineer Zuo Guangsheng are at a loss, and the situation of technicians at other steel plants is not much better.
“There will really be some problems that require your cooperation as soon as possible, especially the improvement of the bearing heat treatment process, which needs to be completed by your factory.”
“The heat treatment process of the bearings Do you need to modify it too?”
Hearing what Jiang Hui said, Ji Hua immediately thought of the scene when he had a dispute with Zuo Guangsheng of Shougang.
I think it is a problem with the bearing steel, but the other party thinks it is a problem with the bearing heat treatment.
Although they didn't break up on bad terms in the end, the atmosphere was far from harmonious.
Now listening to Jiang Hui's meaning, this matter is probably really related to two factors.
The performance of bearing steel must be improved, and the heat treatment process of bearings must also be improved.
“Yes, there is still a big gap between domestic bearing steel technology and foreign advanced levels. It is still very difficult to improve a lot in a short period of time. We can only improve a small part first, and then gradually improve it. ”
“The remaining performance improvement can only be improved through the heat treatment process of the bearing.”
When Jiang Hui said this, Ji Hua didn't refute anything.
After all, theoretically, there is no problem with this plan.
Before he saw the specific content of the plan, he couldn't say much. He could only say that he would cooperate fully.
……
“The change in the ratio of these alloying elements is completely feasible from a theoretical point of view.”
"But I still have some questions. For example, why is the chromium content set at 1.3%~1.65%?"
After Jiang Hui sorted out the information, he and Zhu Jiansheng went to find Zou Yuan. comminicate.
Zou Yuan is definitely a professional in this regard.
“Chromium mainly plays a role in improving the strength and hardness of steel, improving the high-temperature mechanical properties of steel, improving the corrosion resistance and oxidation resistance of steel, preventing graphitization of carbon in steel, and improving quenching. Permeability. ”
“But too high a content will significantly increase the brittle transition temperature of steel and promote the temper brittleness of steel.”
"So its content needs to be controlled within a certain range. The current data is calculated by me based on various data. The final effect needs to be verified with Shougang."
Jiang Hui knew Zou Yuan There will definitely be various questions. After all, in the information I compiled, the various data appear very unexpectedly.
Normally, the chemical composition data of these materials are finalized through various tests.
But everyone knows that Jiang Hui is unlikely to carry out actual material tests. He simply does not have the conditions for this. "Then why is the manganese set at 0.2%~0.4%?"
What Jiang Hui said was completely logically sound, so Zou Yuan did not continue to struggle, but continued to confirm other information.
“Manganese is a good deoxidizer and desulfurizer in the steelmaking process. It can increase the strength and hardness of steel, improve the hardenability of steel, and improve the hot working performance of steel. However, increasing the amount of manganese will reduce The corrosion resistance and welding performance of steel.”
“I also calculated a range based on some past data, and ultimately it needs to be verified through experiments.”
“As for silicon. , it acts as a reducing agent and deoxidizer in the steelmaking process, which can significantly improve the elastic limit, yield point and tensile strength of steel. "
"The combination of silicon and molybdenum, tungsten, chromium, etc. can improve the resistance. Corrosive and anti-oxidation effects, but the increased silicon content will reduce the welding performance of steel. ”
Jiang Hui knew that Zou Yuan would definitely ask about the reasons for setting the ratios of other chemical components, so he simply explained it himself.
“The molybdenum content is controlled between 0.10%-~0.20%, which helps to improve the strength and wear resistance of the alloy...”
The main ingredients are given in one breath After the introduction, Zou Yuan had a deeper understanding of Jiang Hui's steel theory knowledge.
“Judging from the current situation, the performance of this grade of bearing steel may be improved, but specifically, we must communicate with Shougang as soon as possible to arrange the production of samples, and then conduct testing and confirmation.”< br>
Zou Yuan thought for a moment and gave his opinion.
"According to my estimation, this bearing steel has excellent hardness after proper heat treatment and can provide excellent wear resistance and fatigue resistance."
"And it has good heat treatment plasticity and moderate The cold working plasticity can achieve ideal structure and performance through appropriate heat treatment process. "
"These performance improvements can allow Capital Gear Factory to further improve the bearings by improving the heat treatment process during the bearing processing process. The performance finally meets our design requirements.”
Jiang Hui further added the performance prediction of the bearing steel he gave.
He has told the Capital Gear Factory before that this time the technical improvement will be carried out from both directions of bearing steel and bearing heat treatment, and ultimately achieve the goal.
"If this is the case, then it is really possible to meet our requirements in the end."
"Lao Zhu, Xiao Jiang, why don't we just go to Shougang now?"
Zou Yuan I can't wait to go over and finalize the next specific arrangements with Shougang.
The scale of steel plants is very large. To trial-produce some experimental steel products, there are quite a lot of things that need to be coordinated, and it cannot be done in a day or two.
Of course, it would be best if Shougang’s laboratory could handle part of the sample preparation work.
It's just that Jiang Hui doesn't think this possibility is very high.
The situation of steel is very different from other products. The smelting process of crude steel must be carried out in a blast furnace. At most, you can build a small-scale blast furnace to meet some special needs.
But it is basically impossible to do it all directly in the laboratory.
This is also an important reason why the steel industry cannot be easily handled by ordinary small countries.
“Okay, let’s go to Shougang and have a chat first. They should also be very interested in this plan.”
Zhu Jiansheng naturally had no objections to Zou Yuan's proposal.
Soon, the group headed towards Shougang.
……
Many circles in China are actually very small.
There are some problems with the Hummer project hosted by the Capital Institute of Technology, and there is no way to keep this information completely confidential.
Erqi, which has been paying attention to this project, knew about it immediately.
"Chang Chen, the Hummer project is said to be at a standstill due to major defects in the prototype testing phase."
Han Hao knew that Chen Liangrong was very concerned about Hummer. After all, the Second Automobile Works Group had previously In order to win this project, a lot of thought was spent.
However, it didn’t work out in the end.
Even so, FAW did not completely give up on this project.
"A major defect occurred?"
Hearing what Han Hao said, Chen Liangrong immediately became interested, "What is the specific situation?"
If Capital Institute of Technology cannot handle this project, by then Second Automobile Works once again proposed to the First and Fifth Machinery Departments to undertake this project. It seems completely reasonable, right?
Chen Liangrong felt that things seemed to be turning for the better.
“I heard that the bearings inside the two core components of the gearbox and transfer case cannot meet the design requirements because the performance of the bearing steel does not meet the requirements.”
“I’m afraid it’s not that easy to achieve a technological breakthrough in bearing steel in a short period of time.”
“Shougang’s experience in special steel is not particularly rich, and it is estimated that more will be needed. It takes time to produce bearing steel that meets the requirements.”
Han Hao quickly explained what he had learned.
Those who work on automobiles must deal with all kinds of steel materials.
Special steel is an existence that is impossible to avoid.
Whether it is the engine and gearbox, or the chassis and other parts, a variety of special steels are used.
The performance requirements of these special steels vary.
The special steel on bearings, gears and other parts is a typical representative.
“Although the scale of the domestic steel industry is not small, the technical level is still far behind that of developed countries.”
“If you want to make a breakthrough in a short time, It’s really difficult.”
"Let the Capital Institute of Technology hit a wall, and then we can take over this difficulty. Maybe it will be a matter of course."
"But we also need to communicate with some steel plants in advance to see if it is possible. Solve this problem."
"Or ask people to contact foreign bearing manufacturers or bearing steel manufacturers to see if it is possible to use imported bearings or bearing steel."
Chen Liangrong thinks two. You can start thinking about some follow-up work here.
Opportunities are reserved for those who are prepared.
Whether Second Automobile Works can successfully seize the Hummer project in the future is naturally closely related to the preparations they have done in advance.
"Then I will try to get some drawings of these bearings first, otherwise some work will not be easy to carry out."
After hearing Chen Liangrong's words, Han Hao was also ready to act quickly.
Prototypes of bearings have begun production, and the relevant units must have drawings.
Han Hao felt that he could still get it if he worked hard.
(End of this chapter)