In fact, as early as World War II, there was the emergence of this kind of armor steel, and the practice at that time was also very simple, called surface hardening, or the same piece of armor steel, just using a gas flame to heat the surface of the deck at high temperature, and then quickly quenching and cooling processing, which is called case hardening, the surface has a brittle layer with extremely high hardness, and after it reaches the inside, it will soften.

However, of course, there is no need to do this now, and now we have to engage in double-hardness steel, which is directly formed by closely rolling two alloy steel plates together, and this rare earth armor steel, codenamed 623, is made in this way.

The temperature outside the furnace was quite high, and everyone stood outside the furnace and looked at a steel plate that had just been rolled there.

"These steel plates are all pre-produced by us, and a batch of them will be produced in the initial stage and handed over to you for trial in a machine factory." Ma Hui said: "We are a steel mill, only responsible for rolling qualified steel, to your machine factory, how to deal with it, is your machine factory's business." ”

When he said this, Ma Hui's face was gone, and his eyes were serious: "When you are dealing with it, the weld must reach the same strength, and we wish you success." ”

The steel mill is only responsible for manufacturing steel, and how to weld the steel is the task of a machine factory.

This task is not easy.

Now, with the development of the times and the progress of technology, the tank has not been cast, whether it is the hull or the turret, it is welded, only welding, can use composite armor, casting is not casting.

And welding, the weld must have the same strength as the steel plate, after all, the armor-piercing bullet has no long eyes, it may hit the armor plate, or it may hit the weld, if the position of the weld is not enough, then it will be directly penetrated from the position of the weld.

How to weld is a matter of a machine factory, and this task is very important.

Hearing each other's words, Qin Zhenhua and Zhao Guodong, the expressions on their faces also became serious.

Yes, it's a big challenge.

A machine factory, is to build tanks, this kind of manufacturing, can not always stay on the original basis, the steel plant has been produced to produce better performance steel, of course they must master this welding technology, if the welding technology is not up to standard, then it can not be put into use.

It's a huge roadblock.

"The hardness value of the surface of this steel we produce can reach 580HBW to 710HBW, and the hardness of the back is lower, about 450HBW to 530HBW."

Even in the lower part of the back, the hardness value of the armor steel used in production has been reached!

"When this armored steel is installed, our tank crews will be more confident." Qin Zhenhua said: "This armored steel, we have to decide!" ”

Among the three major elements of the tank, firepower, mobility, and protection, in the country, firepower is ranked first, and the maneuver and protection behind are all serious challenges.

Good mobility, that must have an advanced engine, and strong protection ability, it means that the tank will be heavier, but also look forward to high-horsepower diesel engines, therefore, a machine factory is stepping up the development of advanced high-horsepower diesel engines, and strive to achieve breakthroughs in these aspects, and once there is better armor steel, of course, it will also be used.

"The grassland steel plant is really a big unit, I think, it is larger than our machine factory." Qin Zhenhua looked around with a sigh and said.

In fact, people are really large, just the number of employees, there are tens of thousands of people.

The first time he came to the steel plant, Qin Zhenhua was also an eye-opener.

"Although our unit is large, but the benefits are not as good as your factory, now, many workers in our factory are looking at your New Year's welfare." Ma Hui said: "If this continues, it is estimated that they will have to report and ask to be transferred to your factory to work." ”

"Yes, we're welcome." Qin Zhenhua said heartlessly, not caring about the vinegar in the other party's words, and now, he really didn't have time to think about this, his mind was constantly spinning, thinking, who would be more appropriate to hand it over?

Qin Zhenhua also has welding skills, and even the welding technology is still first-class, but Qin Zhenhua doesn't have time! He has to coordinate so many projects, and there are too many projects to be carried out at the same time in a machine factory, so he must find an experienced master in the workshop to pick the beam.

To whom? Go back and do some research.

……

The end of the year is getting closer and closer, and there is already a stronger and stronger smell of the New Year outside.

The whole family courtyard of a machine factory has been lively, every household has New Year's goods, especially the ten catties of meat, it is unprecedented, if it is a dual-income family, all of a sudden, there are twenty catties of extra meat, this year, the elation.

There are already housewives who are busy working, some croquettes, some roast meat, and the entire family courtyard is shrouded in a layer of fragrant smell, which makes people want to smell more when they walk by, and then, the saliva of some little children flows out.

In the midst of these lively scenes, there are also some more deserted places.

For example, Du Youwen.

"Smoking, smoking, at home, you know smoking, do you know how much this box of cigarettes costs?" In the room, a cigarette was lit, and before Du Youwen could take a puff, his wife Yu Xiuxiu's scolding had already arrived.

This year, their home was quite deserted.

Back then, Yu Xiuxiu was also a girl who was a watery girl, but she fell in love with Du Youwen who came back from school, entered the factory, was a cadre, and entered the R&D room.

Where did you think that there is today!

Yu Xiuxiu's face was very ugly.

"What's wrong? What's wrong? I've been carrying this box of cigarettes in my pocket for a week, so what's wrong with taking it out and smoking one? Du Youwen also held back his anger.

"Okay, you still dare to talk back, there are no New Year's goods at home, you still have the heart to smoke, this day, you can't live it!" Yu Xiuxiu shouted as she grabbed pots and pans and fell to the ground.

It's been a few months, after Du Youwen was fired from the factory, he never went out to look for a job, and he spent so much at home, although he had some savings at home, he couldn't afford to go in and out, and he couldn't live this day.

"Trouble, trouble, you know that there is trouble, if you really want to make trouble, go to the factory to make trouble, it's the factory, it's Zhao Guodong, it's Qin Zhenhua who fired me, you want to make trouble, find the culprit to make trouble." Du Youwen also shouted.