Ten minutes later, Mu Yang came to the titanium alloy factory again.

Seeing the arrival of the boss, Long Xuan handed him the printed data. At the same time, he couldn't hide his excitement: "Boss, the data of tc4 produced by workpiece number 410 is really exaggerated, and the mechanical performance data is much beyond the standard. , and the harmful element is much lower, I can't believe it, I thought the measurement was wrong.

However, we take a total of three groups of materials as samples, and each group takes four samples, which is the case for 12 data;

And the batch of materials we smelted, the data is relatively normal. "

Mu Yang took the experiment report, while Long Xuan explained to him that the label had already been prepared.

If the plate thickness is 12 mm thick, the performance is measured at room temperature.

The normal main mechanical property standards (annealing heat treatment state, civil use) are: tensile strength b/mpa895, elongation 5(%)10;

The normal main mechanical performance standards (solid solution heat treatment state, higher requirements) are: tensile strength b/mpa1100 (three times that of commonly used steel q235b), elongation 5(%)10.

Generally speaking, aviation titanium alloys require solid solution treatment (while eliminating internal stress, otherwise fatigue cracks are prone to occur).

Two domestic titanium alloy manufacturers that are relatively good fork, the tensile strength of tc4 is between 1100-1250mpa, and the elongation is between 12%-20%.

However, at present, the performance is unstable and there are many impurities, and high-end aviation titanium alloys still rely on imports.

Muyang asked Long Xuan to do the material experiment after solid-melting treatment.

Long Xuan's batch of materials, he looked at the experimental data, barely met the minimum requirements, slightly worse than the domestic two.

One set of data is low, the tensile strength is between 1010-1050mpa, the tensile strength is lower, it can be used for sure, but if it is used in aviation, it does not meet the design requirements, unless the material requirements are reduced.

In terms of processing performance and high temperature creep resistance, the processing speed is slow, and it is only suitable for parts that work for a long time below 400 C. When it reaches 400 C, the tensile strength decreases rapidly, and the average is only about 801.3 mpa (if the annealed state is only five or six hundred mpa about).

If the temperature reaches 800 , the tensile strength drops sharply, and the average is only 73.2mpa, which is definitely not usable.

Compared with the group of tc4 materials debugged by Muyang, the experimental data are obviously different.

The tensile strength is between 1300-1450mpa, the elongation is between 20%-26%, and the harmful elements such as hydrogen, carbon, and oxygen are much lower; the processing performance is good, and the high temperature creep resistance is good, and the temperature is still at 550 . With a performance of 800mpa, it can work at this temperature for a long time.

When the temperature reaches 800C, the tensile strength also drops sharply, but there is still a performance of 400mpa, which can be said to have high temperature performance.

It's just that when the temperature reaches 1000C, the average tensile strength is only tens of mpa. At this temperature, the material has no performance.

These data are better than Muyang expected, and the overall performance has been greatly improved.

The optical tensile strength is increased by about 30%!

Elongation, the value is about double! The actual toughness is not only doubled, and cannot be measured by numerical values alone.

It can be said that the overall performance is a qualitative improvement.

Even better than the titanium alloys of the best titanium alloy manufacturers in the world, especially the processing performance and high temperature creep resistance, which directly beat the international manufacturers.

Another example is the elongation rate. Normally, tc4 is difficult to make a forming material (such as L-beam) because of poor plasticity;

However, Muyang's tc4 has an elongation rate of 20%-26%, which already has the basis of cold-rolled forming.

It was really exaggerated, no wonder Long Xuan was shocked.

"Very good, again, pay attention to confidentiality! You should know what these data represent."

After reading the experimental data, Mu Yang returned the data to her.

"Boss, I understand what it represents! Our tc4 has already stood at the highest peak in the world." Long Xuan nodded solemnly, very proud in her heart.

Mu Yang looked at her and nodded, and then ordered: "Make more batches and test more to see if the data is stable; if it is stable, then proceed to ta7 production, the workpiece number is 710, the same size.

At the same time, additional tests such as welding performance, low-cycle high-cycle fatigue strength, isotropy, kic, dt, residual stress, etc., are tested according to the performance requirements of Junyong aviation titanium alloys. "

"Okay, boss, we haven't applied for the four certificates of Jun Gong. If Shangjun uses the market, we need to apply." Long Xuan mentioned a very important matter.

Even if the Xinghai Group can produce titanium alloys with superior performance, it is not so casual to want to go to the market, mainly because of qualifications.

In the field of Junyong titanium alloy materials, in addition to obtaining the "four certificates of Jungong" (national military standard certification, confidentiality certification, license certification, and directory certification), manufacturers also need to participate in Jungong's supporting projects to carry out a lot of research and development work. , it is possible to enter the formal development stage of the project through the bidding of supporting projects.

After that, it is necessary to pass the process review, material review, ground function test, ground static test, installation assessment, and installation review in order to become a qualified supplier of relevant types of materials. The whole process takes a long time, and it is normal for one or two years. longer.

Therefore, Junyong's titanium alloy material business has a typical characteristic that the long investment period is proportional to the high return period, and the entry threshold is relatively high for ordinary titanium alloy manufacturers with weak capital and R&D capabilities.

Of course, this certification process also depends on Jun Fang, and it can be done in a few months if it is fast.

To understand this process, Mu Yang did have to go through various complicated experiments, and the time period was relatively long.

He doesn't like these rules and regulations.

But if you really want to go to the monarch to use the market and mix in the land of China, you have to obey the monarch's opinion.

If it is not used by you, it can be used for experiments or on the civilian market.

Titanium alloy is a raw material, not a finished product, and the restrictions are different.

For example, Xinghai Group wants to build a rocket, will that work?

Certainly not!

Because there is no production qualification and four certificates of Jun Gong, it does not mean that you have the ability to cultivate, and even doing experiments is not allowed.

When Xinghai Materials Co., Ltd. was registered, it has indicated the business scope of non-ferrous metal production and processing, and it is okay to produce titanium alloy plates.

However, when it comes to high-performance titanium alloy materials, if he wants to enter the civilian market, he may be restricted from listing due to over-performance and can only be sold to Monarch.

Of course, you don't need to do such good performance, or limit the number, that's no problem.

The above is not allowed to go to the civilian market, it is just a possibility.

Specifically, Muyang has to ask the company's personnel to first register with the H city defense technology industry management department and apply for other departments.

At present, it is still far from mass production, and Muyang plans to move the equipment to the headquarters base before proceeding.

After the National Day, some factories in the headquarters base can be put into use, and it will only be more than a month.

After careful consideration, Mu Yang explained to Long Xuan:

"After the experiment, package the equipment and move the equipment after the National Day. It can't be transported as a whole~www.mtlnovel.com~ can be disassembled and moved again, but it must be labeled in advance to facilitate re-installation. I will come to the matter of the four certificates of master work. Arrange, you just need to do the experiment."

Muyang glanced at the equipment in the factory, there are quite a few, there are 2400kweb furnace, 15 tons of vacuum consumable electric arc furnace, mixed material system, 10,000 tons of hydraulic press, fast forging machine, 10,000 tons of free forging machine, vacuum plasma welding box, 3.3 meters of reversible hot rolling mills, 1.2 meters of four-roller reversible hot rolling mills, cold rolling mills, vacuum annealing furnaces, sanding machines and other equipment.

Many are imported from Germany, Austria and island countries, and then modified in their own factories, mainly with automatic operating systems.

Of course, not all devices have to be disassembled.

"Okay, no problem." Long Xuan suddenly felt heavy inside.

off topic

Writing these two chapters takes too much brain cells, and it is relatively hard-core, so let's make do with it. Button group 221300748

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