Siheyuan starts from a better life

Chapter 244, Alloy Steel

Author: Flying Wooden Fish

Chapter 244, Alloy Steel

Seeing Guo Jianjun walking out, Wang Tianlai, who was walking there, said: "Gong Jiang, I think we are so familiar with each other, so don't call them Gong Wang or Gong Zhang. They are older than me and he is so shameless. You

Call them Lao Wang, Lao Zhang, and they call you Lao Jiang, do you think so?"

"It's okay. We're all so familiar. From now on, you'll call me Lao Zhang and Lao Wang. Let's not call him Lao Jiang, let's just call him Xiao Jiang."

"That's a bit inappropriate! Your rank is higher than theirs. Please don't they call you Jiang Gong."

Then Wang Tianlai will be able to be clever and intelligent.

At this time, Jiang Yan also felt that it was a bit inappropriate for them to call him Xiao Jiang, so he did not correct Wang Tianlai for calling him wrong.

After talking about that matter, Jiang Yan didn't hesitate to address him, and directly brought the topic to the matter of writing a manual of operating specifications.

After hearing what Jiang Yan said, Wang Tianlai said happily: "No problem, they both fully support it. If you need anything from them, just ask."

"No, Jiang Gong, just ask."

At that time, Guo Jianjun came over with three cups of tea and placed one cup next to Jiang Yan and the other three.

"What took you so long?" Jiang Yan asked after taking a sip of the tea brought by Guo Jianjun.

"The person in the logistics department forgot to prepare teacups in the office, so he went to the logistics department to get them temporarily."

Hearing Guo Jianjun's words, Jiang Yan nodded, indicating that he knew it, and he also understood the twists and turns.

He believed that Guo Jianjun would handle the rest.

"Gong Jiang, I heard that my major is metallurgy."

Suddenly, Zhang Xiang, who walked there silently, asked.

"Have you studied metallurgy? Why do you have any problems that you need him to solve?"

When Zhang Xiang heard Jiang Yan's words, a hint of surprise flashed in the corner of his eyes. He put the teacup in his lap, took out a piece of paper from his pocket and handed it to Jiang Yan.

"Mr. Jiang, can you help him check whether the processing of that part is due to quenching problems, which caused the deformation of the workpiece during subsequent condensation."

Quenching involves heating the steel to a critical temperature, holding it for a certain period of time, and then cooling it at a rate greater than the critical cooling rate to obtain an unbalanced structure dominated by martensite (bainite or single-phase austenite can also be obtained based on demand)

A heat treatment process method for the body). The most widely used process method in the heat treatment process of quenched stainless steel.

The heat treatment of steel generally includes four basic processes: annealing, normalizing, quenching and tempering.

"Yes, he feels that the workpiece may not be deformed due to the quenching process. Please wait a moment."

After Jiang Yan said this, he quickly walked to his desk and began to calculate the part.

Jiang Yan said while calculating, presumably we should also know that the deformation of general workpieces should be divided into three situations.

The first is whether the cutting force is too large and the cutting heat is too high. Excessive cutting force will cause the external stress of the material to increase and cause deformation; too high cutting heat will cause thermal deformation of the workpiece.

The second type is that the machine tool, tool, and workpiece have insufficient rigidity. Under the action of cutting force and clamping force, the machine tool, tool, and workpiece will undergo elastic deformation due to insufficient rigidity, thus causing processing errors.

The third workpiece clamping method is incorrect. During the processing of the workpiece, the workpiece is deformed due to improper application point of the clamping force, excessive clamping force or inaccurate positioning surface.

After hearing Jiang Yan talk about the three deformations of the workpiece, Wang Tianlai and Zhang Xiang quickly recorded Donglai.

"What level of workers did you use to process that part?" Jiang Yan then asked again.

"A level five worker in the factory."

"If the person who helped me with the processing was not a level five worker, he probably had something to do with the steel I used to make the parts."

After Jiang Yan said that, he didn't say anything anymore, and Donglai didn't calculate anything in his legs.

After a while, Jiang Yan looked up and Zhang Xiang, who was waiting there, said: "That's right, it's just about the steel. You see, which one just gave me a certain degree of ability to process parts in terms of hardness or toughness?"

gap."

"Does Gong Jiang have any solution?" After listening to Jiang Yan's words, Zhang Xiang asked again.

"Well, Lao Zhang, you are waiting for something." After Jiang Yan said that, he picked up a piece of paper and quickly started counting.

After a while, Jiang Yan stopped and picked up the pen in his leg.

"Lao Zhang. You can see through calculations that my workpiece cannot achieve that kind of hardness and toughness after one quenching.

"I want to achieve your effect. If I want to achieve that effect, after his calculations, my workpiece should be quenched for the second time during condensation. It should be able to achieve that effect without causing any damage to the workpiece.

The deformation ultimately boils down to the fact that the hardness of the steel is not up to standard."

"The method he told me is not a temporary remedy. Even if qualified parts are processed, its lifespan will be shortened a lot."

"Then he can find the best steel from abroad at this stage. In the past, almost all the steel used to produce this kind of workpieces was imported from SL."

When he said that, Zhang Xiang's voice became much deeper.

"If he didn't make a mistake in calculation, the steel I use to produce the workpiece should be medium carbon steel."

"No medium carbon steel" Zhang Xiang whispered.

In the 1950s, the state focused on the production of low-carbon and medium-carbon steel, and it was not until the late 1960s that high-carbon steel could be produced.

High carbon steel is often called tool steel, with a carbon content from 0.60% to 1.70%, and can be quenched and tempered. Hammers, crowbars, etc. are made of steel with a carbon content of 0.75%; cutting tools such as drills, taps, reamers, etc.

Made from steel with a carbon content of 0.90% to 1.00%.

According to speculation, Zhang Xiang's workpiece should be suitable for high-carbon steel with a carbon content of between 0.85%.

As Jiang Yan who has traveled through time, he naturally has the formula for high carbon steel. So, there is a recipe for low-grade high carbon steel. Dong Jiang Yan has a better steel formula than high carbon steel, so

No chromium vanadium alloy steel.

Chromium vanadium alloy steel is better than high carbon steel. Chromium vanadium steel is an alloy tool steel with added chromium vanadium alloy element. After heat treatment, the hardness is above 60HRC, which is harder than high carbon steel and has better wear resistance. Chromium vanadium steel

Steel has high hardness and toughness, which is better than pure carbon high-carbon steel. The chemical elements of chromium-vanadium steel are different from carbon steel, containing iron elements, chromium elements and vanadium elements, and very small amounts of carbon elements. Therefore, chromium

Vanadium steel has better mechanical properties and chemical properties than high carbon steel, making it a better choice.

The two metals chromium and vanadium are associated mineral deposits in other countries.

About 80% of the vanadium production in other countries comes from vanadium-titanium magnetite, and vanadium-titanium magnetite is a major characteristic polymetallic mineral resource in other countries with huge reserves. It is a symbiosis of vanadium, titanium, iron, chromium and other multi-metals, and the resources are comprehensively utilized.

The value is very high.

Especially for vanadium mines, the Yantouzhai vanadium mine of ancient Zhao in Western Hunan was later called “the largest vanadium mine in Asia”.

Therefore, it is not difficult for other countries to produce chromium-vanadium alloy steel. At least the countries that produce these raw materials will not be short of them and will not be choked by others.

Chromium vanadium steel has good wear resistance under certain working conditions and can also be used in the production of tank belts.

(End of chapter)