Everyone looked at Zhou Jianhua and Wang Shiqing strangely, it was strange that Wang Shiqing's attitude towards Zhou Jianhua changed so quickly, what Zhou Jianhua said was just an analysis of a possibility, whether it was this reason, and how big the impact of this reason was, all of which needed to be verified through many tests. And now Wang Shiqing has not made a comparison and verification, why does Wang Shiqing admire Zhou Jianhua so much?

What everyone understands is that Wang Shiqing, who has participated in many chain link repair tests, has actually discovered the phenomenon that Zhou Jianhua said that the high-temperature tempering brittleness of this alloy steel is very obvious, but his focus at that time was on the time and temperature control of the conventional heat treatment process of this material, and he did not pay attention to this phenomenon, and even completely ignored this situation later. Now after Zhou Jianhua's little push, he immediately understood.

Zhou Jianhua nodded slightly to Wang Shiqing and continued to explain to everyone:

"I use a low-temperature tempering of about 300 degrees in the wood stove, which avoids the embrittlement of the material at the same time, and can also transform the quenched martensite in the alloy structure into tempered martensite, which can not only increase its hardness and improve wear resistance, but also reduce the brittleness and stress caused by quenching, and this is the heat treatment effect that the mining chain needs most - uh, in fact, what I want to say is that when the same steel is used to make specific products with different functional requirements, the corresponding heat treatment methods should also be adjusted accordingly to meet different functional needs."

"That's great! In the past, we only considered the heat treatment process requirements of the conventional application of this steel, but did not carefully analyze the special functional requirements of the mining chain, so that we went into a misunderstanding. Now that you say that, I totally understand! The process idea you mentioned is also of great guiding significance for our future work in the heat treatment of other products! Thank you, Master Xiao Zhou! Thank you, thank you! ”

After Zhou Jianhua's click again, Wang Shiqing felt that he had suddenly had an epiphany, nodded in surprise and thanks, and his face was full of the word admiration, as if a student was thanking the teacher for his teachings.

All the people present, including Section Chief Yan Donghai, who came with Wang Shiqing, were shocked by Wang Shiqing's 180-degree change in attitude towards Zhou Jianhua at this time.

Except for Wang Shiqing, no one here can fully understand Zhou Jianhua's explanation, but everyone can feel that Zhou Jianhua is very proficient in metal heat treatment technology, and even the proficiency is above Wang Shiqing. But Wang Shiqing's attitude as a senior engineer majoring in mechanical engineering made all the people present secretly frightened, saying that this junior high school student's ability is too incredible and too rebellious!

"Master Xiao Zhou, can you reveal what is the composition of the quenching medium in your jar? I just smelled like I smelled ammonia. Yan Donghai also pointed to the broken ceramic jar on the ground at this time, and asked Zhou Jianhua curiously.

Yan Donghai himself is a coal mining professional and does not know much about the metal heat treatment process. The repair of the chain link is a cost-saving project that they hope to implement in the Changhong Coal Mine, and he has often led a team to Tonglin Coal Mine to help solve some production technology problems for many years, and he is very familiar with Chen Guodong, so he mainly accompanied Wang Shiqing to observe this time. Faced with the specific process of repairing the chain, Yan Donghai was just a soy sauce player at this time.

"This quenching medium...... It is an aqueous solution of some inorganic salts and organic salts, as well as ...... A small amount of urea. ”

Zhou Jianhua replied hesitantly.

Zhuang Minghui on the side couldn't help laughing, Zhou Jianhua also pursed his lips and smiled embarrassedly, and the others looked at each other, not understanding what they were laughing at.

"Oh...... Hehe, it seems that Master Xiao Zhou wants to keep it secret......" Yan Donghai saw that Zhou Jianhua was vague, and snickered at himself, thinking that Zhou Jianhua was unwilling to say it, and he was slightly unhappy in his heart.

In the era of planning and economic planning, state-owned enterprises and enterprises, whether in terms of personnel or materials, were often allocated by the competent state departments free of charge, and in the exchange of production technology, state-owned enterprises often provided support and assistance to collective enterprises free of charge, and the Chinese people at this time did not have any awareness of intellectual property protection.

In the past, the state-owned Changhong Coal Mine and the Mining Bureau Machinery Repair Factory did not help the Tonglin Commune Coal Mine, which was a collective enterprise, in terms of technology, but now Zhou Jianhua of the Tonglin Coal Mine actually wants to hide it from Yan Donghai in turn, and Yan Donghai certainly has reason to be unhappy.

"Hehe, Section Chief Yan, you misunderstood! I'm not trying to keep it a secret, it's just that it might be a little indecent to say it. Zhou Jianhua couldn't hold back his laughter and said loudly: "Since Section Chief Yan wants to know about Lu Dao, then I'll just say it!" The quenching medium I use is actually a little salt added to the urine! ”

"Urine?!" Yan Donghai's eyes straightened, and he asked in surprise, "What kind of truth is this?!" ”

"To put it simply...... For this kind of alloy steel, it is best to quench it with special oil, but at present, there is no such condition at hand, so it has to be treated simply. Zhou Jianhua explained:

"Let's talk about the situation of using water as a quenching medium. As we all know, the quenching effect of pure water is not good - this is common sense - adding a little salt can improve the hardenability, adding a little nitrogen - that is, urea, can have a little nitriding effect, which can increase the surface hardness and corrosion resistance of the material. ”

"Hehehe, I see...... You're using pure natural urea! Yan Donghai himself couldn't help but laugh dumbly.

Although Yan Donghai didn't know much about the difference in the use of quenching medium explained by Zhou Jianhua, as a soy sauce maker, he just wanted to know what Lu Dao was in, just satisfy his curiosity, and by the way, he could also help Wang Shiqing provide some technical information, and what he really needed to pay attention to was whether this technology could effectively help Changhong Coal Mine save production costs, so he asked: "After such treatment, how long can this repaired chain link last?" ”

"It shouldn't be less than half a month, and if you're lucky, it's possible to use the last month." Zhou Jianhua replied.

"If we can use it for a month, we can really save a lot of costs every year for our Changhong Coal Mine!" Yan Donghai said with joy on his face.

Changhong Coal Mine is the backbone coal mine of Jiancheng County Mining Bureau, with a wide variety of types and quantities of equipment with large-scale mining chains as components. Due to the poor quality of the domestic mining chain, the large-scale mining chain used in the domestic equipment at this time basically relies on imports, which is expensive and difficult to purchase. If there is a way to repair the mining chain by itself, it will indeed produce high economic benefits for large coal mines.

Although Director Chen Guodong does not understand the technical things, he has basically understood on the side, Zhou Jianhua's operation today has been highly recognized by the professionals present, and the chain he repaired should also be relatively successful.

Seeing that the connoisseurs were almost talking, Chen Guodong also came up and patted Zhou Jianhua's shoulder, and said with great emotion: "Xiao Zhou, the things in your stomach are very practical!" In the future, you have to give full play to it, and the vast world will make great achievements! ”

Yan Donghai also followed Chen Guodong's words and sighed: "Although today's soil restoration still needs to be tried to determine its effect, Master Xiao Zhou obviously has a deep theoretical foundation in the metal heat treatment process, and can also be flexibly used and integrated, which is indeed a rare talent!" ”

"Hehe, in fact, today's restoration work was completed with the help of Master Fang and Master Zhuang, without the help of the two of them, I couldn't do it alone." Zhou Jianhua said modestly and showed team spirit in a timely manner.

Chen Guodong laughed loudly: "Okay! Everyone's credit! Don't say anything, go to dinner! Section Chief Wang, Section Chief Yan, let's go to the cafeteria to eat and chat! Chen Guodong greeted Yan Donghai and Wang Shiqing, and then turned around and greeted a few people in the mechanic class with his hand: "You all come!" Come right away when you're done! As he spoke, he enthusiastically led the two section chiefs to the cafeteria first.

Several people in the mechanic class are secretly figuring out what Director Chen means, Tonglin Coal Mine will have more places to ask for Changhong Coal Mine and Mining Machinery Repair Factory in the future, of course, they must be courteous and thoughtful, as for the mechanic class, it doesn't matter to Director Chen whether to eat or not, everyone should admit: "Okay, let's come over later." But in my heart, I said: After a while, I should go to the cafeteria to eat.

Zhou Jianhua saw that there was still more than half an hour before lunch, and he could just complete the tempering process of the chain, so he relaxed, and while adding some firewood to the firewood stove from time to time, he chatted with Fang Guisheng and Zhuang Minghui.

Fang Guisheng was obviously not in a state, and he didn't want to talk much. However, Zhuang Minghui was very interested, and chatted with Zhou Jianhua about some trivial matters in Tonglin Coal Mine.

As a result, in less than half an hour, someone from the cafeteria came over and shouted: "Master Fang, Director Chen called you over to eat!" Let's hurry up! ”

Zhou Jianhua, Fang Guisheng, and Zhuang Minghui looked at each other and smiled, and they all said that they would go over immediately.

Zhou Jianhua no longer added firewood, left the chain in the hot ash of the simple stove, let the chain cool down slowly, and then walked to the canteen with the two.

As soon as the three of them walked into the cubicle of the cafeteria, Chen Guodong, who was sitting at the table, pretended to be angry and greeted them loudly: "Why did you come!" The two section chiefs are waiting for you to wait for you and haven't taken a sip of wine yet! ”

Yan Donghai also stood up from the table and greeted: "Come on, come on, my wine is just waiting for you to come and drink together!" ”

Wang Shiqing also beckoned to Zhou Jianhua, pointed to the vacant seat next to him and said, "Master Xiao Zhou, come, sit here!" ”

Zhou Jianhua nodded at Wang Shiqing and smiled, then sat down in the seat next to him, glanced at the table, and sure enough, he hadn't moved a sip of wine and food, and the three of them were just drinking tea and sipping melon seeds for more than half an hour.