King of Industry

  Chapter 302 Influence of peritectic structure

   Before long, Zhao Guoyang saw the whole process of secondary smelting.

  Secondary smelting is also called out-of-furnace refining in the industry, and it is complementary to continuous casting technology.

  The application of continuous casting technology is no longer a complicated process in the 1990s. Most steel types can be produced by continuous casting technology.

  However, the joint movement of secondary smelting and continuous casting technology is still extremely rare in China.

  Secondary smelting has many advantages. In addition to high efficiency, it can also provide molten steel with uniform temperature, accurate alloy composition and high purity, so that the internal **** inclusions, pores, center segregation and other defects of continuous casting slabs have been significantly improved.

  The Shagang Group's secondary smelting technology has obviously grasped the essence.

   In Zhao Guoyang's view, it is basically not much different from the process he understood in his previous life.

When Chen Guolin was observing the whole process, he did not forget to explain to Zhao Guoyang: "Researcher Zhao, what we are seeing now is the continuous casting process after the secondary smelting. Look at the molten steel, which is undergoing decarburization and degassing. Smelting, it will be released soon..."

   Zhao Guoyang nodded, expressing his approval of Minister Chen's words.

   However, Zhao Guoyang couldn't help but frowned after seeing that the molten steel was slowly cooling down, but immediately entered a state of secondary heating.

  Chen Guolin has been paying attention to Zhao Guoyang's demeanor. Seeing his frown slightly, Chen Guolin was startled.

   "Researcher Zhao, do you think there is anything wrong with it?" He couldn't help asking.

  Zhao Guoyang exhaled a foul breath, nodded to Chen Guolin and Xia Chunming beside him and said: "Minister Chen, Director Xia, I think I have found the problem of the crack on the casting embryo."

   "Huh?" After hearing this, Xia Chunming was a little confused.

  He didn't know Zhao Guoyang's background, so he felt that this young man seemed to be exaggerating.

  Xia Chunming sneered in his heart, and said calmly: "Researcher Zhao, did you see the problem so quickly? It's amazing."

   "So, can you explain to everyone what's going on, so that we can learn more..."

  Zhao Guoyang can naturally hear what Director Xia is saying. What he means is: Calling you a researcher, you really think you are so capable. What can you understand as a young man?

   This man said that he wanted Zhao Guoyang to let the elders know, but in fact he didn't believe that Zhao Guoyang could say that he was ugly.

Facing Xia Chunming's doubts, Zhao Guoyang was very calm, and said lightly: "Director Xia, don't worry about this, I will definitely explain it to you later, but the batch of casting embryos is about to be released now, let's take a look first. Let's see if they still have problems."

  Looking at the puzzled look on Xia Chunming's face, Zhao Guoyang added: "According to my estimation, there is still something wrong with this batch of cast embryos!"

  When Zhao Guoyang said this, Lao Zhu, the senior operator over there, was a little unhappy.

  Just now, he personally operated the procedure from the beginning to the end, and didn't ask Xiaoguan to do it again.

  If there is still a problem with the cast embryo released this time, wouldn't that be slapping yourself in the face?

   Thinking up to this point, Lao Zhu snorted and said, "Hmph, I have a different opinion from this researcher Zhao. I think this time the embryo casting must pass!"

  When Zhao Guoyang heard the words, he just smiled and didn't argue with him.

  In his view, facts speak louder than words, and after the casting embryo is released later, one look will explain the problem.

   Not long after, the cast embryos after cooling were officially released, and Director Xia, Lao Zhu and others also surrounded them.

   "Look, what I said. This time I did it myself, it will definitely be fine!" Lao Zhu glanced at the casting embryo and said confidently.

   Zhao Guoyang, who was watching coldly, coughed and said nothing. He raised his finger and pointed to an inconspicuous spot in the casting embryo.

   Everyone looked in the direction of his finger, and they saw a faint crack on the casting embryo.

   "Ah! This...how could it be like this!" Seeing this crack, Lao Zhu's face collapsed instantly.

  Xia Chunming's face next to him was also blue and red, and he didn't know what to say.

   As for the young worker Xiaoguan who was wronged before, he looked at Zhao Guoyang with admiration, and was very grateful to him for helping him clear up his grievances.

  At this moment, the situation is already very clear.

  Obviously, Zhao Guoyang was right. There is indeed something wrong with the secondary smelting process of Shagang Group.

   After a while, everyone gradually recovered.

Chen Guolin suppressed the doubts in his heart, turned his head to look at Zhao Guoyang and said, "Researcher Zhao, I am really swayed by your foresight now. Tell us quickly, what is the reason for these cracks?" ?”

Zhao Guoyang nodded lightly, pointed to the casting embryo in front of him, and explained in detail: "That's right, if I remember correctly, the carbon content of the three steels Q345, Q235, and 20 should be 0.17 ~ Within the range of 0.24, Master Zhu?"

  Seeing Zhao Guoyang's eyes shot over, the muscles on the old Master Zhu's face trembled.

  He was a little confused, so he replied: "Yes, Researcher Zhao, you are right. The carbon content of these three materials is roughly in this range, which is relatively high among steel materials..."

  Zhao Guoyang nodded, and continued to explain: "Master Zhu is right. Due to the high carbon content, sometimes a peritectic structure tends to appear during the metallurgical process of these three kinds of steel."

  "After the appearance of this structure, the sensitivity to cracks inside the steel increases, and it is easy to leave cracks on the casting blank."

  Zhao Guoyang paused and continued: "Therefore, in the process of secondary smelting, we must pay attention to the adjustment of temperature and water volume, and also control the rise of the surface temperature of the slab."

   Speaking of this, Zhao Guoyang said to Xia Chunming: "When I watched Master Zhu operate just now, his movements were very skillful, but this process cannot be done by one person."

   "Master Zhu needs an assistant to keep an eye on changes in temperature and water volume. Only in this way can the surface temperature of the casting embryo be avoided from rising."

   "It seems that when Master Zhu was concentrating on the secondary smelting, Master Xiaoguan could assist him to observe the changes in temperature and water volume. In this way, it can basically be foolproof!"

  After Zhao Guoyang finished speaking, everyone showed a look of sudden realization.

  Xia Chunming was the most active. He directly gestured to Lao Zhu and said, "Hurry up, Lao Zhu. Let's try again according to the method taught by Researcher Zhao."

"If this problem can be solved, it will be of great benefit to our production of these three basic steel products! Maybe, after knowing that our production process has been improved and optimized, Director Shen will reward us !"

  As soon as they heard that there was an award, Lao Zhu and Xiao Guan immediately cheered up.

  The two looked at each other, and Lao Zhu said to Xiaoguan: "Xiaoguan, I will control the secondary smelting this time, and you will help me control the temperature and water volume! Okay, let's see what happens!"

   "No problem, master Zhu, leave it to me!" Hearing the master's attitude towards him changed, his little concern was as sweet as eating honey.

When the two of them started the second round of smelting step by step, Xiao Ruoyu couldn't help leaning over to Zhao Guoyang's side, and said to him in a low voice: "Damn, Guoyang, you guys are too mysterious, right? Even my current major You know so much about iron and steel smelting? You still let people live!"

  Zhao Guoyang pushed Xiao Ruoyu with his elbow, lowered his voice and said, "Don't you have a text, boy, take a good look at how the two masters in his workshop make steel."

   There is basically no suspense about what will happen next.

  As the newly released batch of cast embryos cooled, everyone was on top of them, and there was no trace of cracks.

  After confirming again, Xia Chunming let out a long sigh when he looked at Zhao Guoyang.

  He shook hands with Zhao Guoyang slightly apologetically and said, "Researcher Zhao, you are so amazing, you are simply my idol!"

  Listening to this crosstalk-like words, Zhao Guoyang felt a little embarrassed.

   "Director Xia, you are too flattering. In fact, this kind of industrial technology is not complicated. You only need to send a special person to assist you."

"Hehe, no matter what, Guoyang, you really helped our Shagang Group with this matter today. Later, I will definitely go to our factory manager Shen and apply for a technical improvement award for you. Make sure you can get it. I got a bonus!" Chen Guolin couldn't help but interjected.

   "If you have a bonus, you don't need it."

  Zhao Guoyang smiled indifferently and said, "Actually, I just came up with an idea. Master Zhu and Master Xiaoguan really solved the problem, and I dare not take credit for it."

  Everyone saw that Zhao Guoyang's words did not seem to be fake, and they were a little strange at the moment.

  Chen Guolin's eyes were admiration, and Xia Chunming's were surprise and relief.

  As for Xiao Ruoyu, he stared at Zhao Guoyang for a long while with sad eyes, which made Zhao Guoyang think that he had some kind of illness.

   Until the end of the visit, Xiao Ruoyu couldn't help pulling Zhao Guoyang aside to ask.

   "Guoyang, let me tell you that you have read too many books, and you have become stupid. The technical improvement rewards in our factory are quite expensive. Four figures are the base, and five figures are also normal."

  Listening to the complaints in Xiao Ruoyu's words, Zhao Guoyang waved to him without saying anything.

  …

  The evening banquet was held on the top floor of the Shagang Group Hotel.

  After listening to Chen Guolin's eloquent talk about what happened in the workshop in the afternoon, Director Shen shook Zhao Guoyang's hand in a burst of approval.

  Finally, I confirmed the approximate time of the next meeting with Zhao Guoyang, and asked him to come over and have a good chat as soon as possible regardless of whether there is any news from the niobium-tantalum mine.

   Zhao Guoyang naturally readily agreed to Director Shen's invitation.

   Suddenly, the atmosphere on the wine table became more harmonious...

  (end of this chapter)