Dizzy and pulled to the table full of military uniforms, Zhong Bai was still dizzy, and he didn't understand what was going on.

Zhong Bai didn't drink when he was brought over, but it was quite in line with his taste.

However, when a comrade from the Military Science Institute mentioned a new topic, Zhong Bai instantly sobered up!

Gao Jian pressed Zhong Bai to his seat, pointed to a soldier in his early forties next to him, and said, "Xiao Zhong, this is the director of Lu Changming of our 385 Military Science Institute, you are now in charge of mining metallurgy, right?" He has some things about alloy technology that he wants to ask you for. ”

"I can't talk about asking for advice, I hope Director Lu will give me some advice." Facing the stranger, Zhong Bai didn't dare to hold it up, nodded very modestly, and replied.

With Gao Jian's words, several Nanyun Provincial officers at the table immediately stopped chatting, and everyone sat precariously and cast their eyes on Zhong Bai and Lu Changming, this scene of ordering and prohibiting was immediately in stark contrast to the lively rhythm of the rest of the tables.

In order to let the other party enter the state as soon as possible, Lu Changming directly introduced himself first.

"Hello Section Chief Zhong. I am in charge of the 385 Military Science Institute, which is mainly responsible for the manufacturing and scientific research of army logistics equipment. Seeing that Zhong Bai's expression had not changed, he should have understood what he meant, and he continued: "What are we currently working on...... Updating the alloy of the mortar shell itself, which involves the problem of how ductile iron is malleable, is currently progressing slowly, and I heard from the high commander that you have also studied in metallurgy, so I would like to ask for advice. ”

If it was a leader who knew what specific work Zhong Bai had done along the way, he would not ask him about such a professional alloy metallurgical manufacturing problem.

Because up to now, Zhong Bai has not actually set foot in this area, although he is hanging the position of the chief of the mining metallurgical section, but in fact, since joining the work, the specific fields he has participated in are nothing more than fertilizer manufacturing + mining These two categories.

But Gao Jian didn't know these details, he attended the inauguration ceremony of the Baifeng Group today just to cheer, but he happened to meet the 385 Military Science Institute some time ago had made a report in this regard, saying that the work had been slow in recent times, and asked the military region to give technical support.

Unexpectedly, this question is really the right person!

Zhong Bai was an industrial genius in the previous life, and this kind of metallurgical problem could not stop him at all!

Seeing Zhong Bai frowning and thinking for a while, he asked rhetorically: "Director Lu, if I guessed correctly...... The purpose of your research is to increase the power of mortar shells, right? ”

Zhong Bai's words immediately shocked the eyes of the officers present!

And the director of the road even immediately glanced at Deputy Commander Gao Jian next to him vigilantly!

Because Zhong Bai accurately guessed the real purpose behind his question!

And this is undoubtedly a military secret!

Seeing that everyone was so nervous, Gao Jian immediately spoke: "Don't be nervous, Xiao Zhong is a comrade with a high degree of discipline in ZZ!" I haven't told him anything about this before, so he probably guessed it himself. ”

With the chief's soothing cheeks, Lu Changming's expression eased slightly, and he nodded: "That's right!" It seems that Section Chief Zhong has studied this piece! The bottlenecks we're currently experiencing are...... Take the line of high-strength low-alloy ductile iron, but the data is not satisfactory, and the thinking is also limited to a certain extent. ”

Zhong Bai immediately began to recall......

Ductile iron is the main component material component of mortar shells, and ductile iron is a high-strength cast iron material developed in the fifties of the 20th century, and its comprehensive properties are close to steel.

In the 70s of the 20th century, both the military industry and the civilian industry conducted research on the development direction of ductile iron, and concluded that adding rare earth elements to ductile iron can effectively improve the performance indicators of the alloy, and ductility is one of them!

Rare earths can spheroidize graphite. Since H. Mo

Since OGH first used cerium to obtain ductile iron, many people have studied the spheroidization behavior of various rare earth elements, and found that cerium is the most effective spheroidizing element, and other elements also have different degrees of spheroidization ability.

Now it's 1982, and there should be some results in this piece, but since the director of Lu Changming also mentioned that "the data is not satisfactory", it shows that there are higher requirements for malleability.

So Zhong Bai asked tentatively: "Is the alloy you are currently using mainly adding cerium to spheroidization?" ”

Sure enough, Lu Changming nodded and asked: "Yes, but at present, the content of metamorphosed graphite in the alloy is still not low, which limits the performance of the alloy itself. Mainly abroad, because we all know about it at home. ”

That is...... How to inhibit the production of metamorphosed graphite?

Zhong Baixin said, hehe, you asked the right person about this!

In the last life, this field should have been a breakthrough in Huaguo's own research in the late 80s.

The answer, of course, is still rare earths.

At that time, studies showed that when the total amount of interfering elements such as Pb, Bi, Sb, Te, Ti, etc. was 0.05wt%, adding 0.01wt% (residual) of rare earth could completely neutralize the interference and inhibit the generation of metamorphosed graphite.

This has become common knowledge in the 21st century, but in 1982, it was still undeclassified.

Zhong Bai thought about it and felt that he still had to answer this question with a reason: "Well, this piece, the French seem to be doing better in the world, I remember the last time I went on a business trip abroad, I saw a few papers, which proposed that adding a certain residual amount of rare earth after testing can reduce or even completely neutralize the interference, and at the same time inhibit the production of metamorphosed graphite." At the time, I thought it was interesting and memorized it, but whether it had any effect or not would have to be proved through experiments. ”

Sure enough, when Lu Changming heard this, he immediately showed excitement!

Because the people who are engaged in this area also know that France is indeed the world's leader in this area, and Zhong Bai's words are obviously true!

Lu Changming couldn't wait to ask, "Wait, Section Chief Zhong!" How much is this certain amount of rare earths? What kind of rare earth elements are the main ones? ”

Seeing that the other party asked about the core, Zhong Bai no longer concealed it, and immediately recited the data fluently: "If 0.02~0.03wt% (residual) Bi element is added to the ductile iron, the spherical graphite will be almost completely destroyed; If 0.01~0.05wt% Ce is added subsequently, the original spheroidized state is restored, which is due to the formation of stable compounds by Bi and Ce. ”

"It turns out that the key is the Bi element!" Lu Changming was so excited that he had already begun to take out a small notebook!

The Bi element that Zhong Bai said, its Chinese name is the bismuth element!

The Ce element, on the other hand, is the cerium element mentioned at the beginning.