"Well, to put it mildly, 60Si2Mn spring steel is also good for making rotary tillers, but it is more troublesome, in fact, it can be produced with cheaper materials and simpler processes, and the service life will be longer, and the use effect will be better, but you should not have this condition at present, well, this is off-topic - let's talk about the problem in front of you first, I can be sure now, With the process conditions of a social machine repair factory, it is definitely impossible to tap the potential of 60Si2Mn spring steel! Zhou Jianhua said:

"However, if your requirements are not too idealistic, I can help you to make some minor improvements, so that the service life of the rotary tiller you produce under the existing process conditions can reach an acceptable level, and at the same time have good economics. In other words, it will have a good price-performance ratio. I would now like to ask, what is the service life of the rotary tiller produced by the state-owned factory that you have purchased at present? ”

Director Fan and Master Zuo glanced at each other, and they didn't dare to believe Zhou Jianhua's words, but they still replied: "The rotary tillage knife I bought can cultivate about 500 acres of yellow mud and sand soil like ours. ”

"Hmm...... When regular manufacturers use this kind of manganese steel to produce rotary tillage, they need to go through more than a dozen processes before and after blanking, stamping, forging, heat treatment, machining, etc., if they only do manual hot forging and heat treatment, the knives produced are cultivated on the same soil quality of about 200 acres, do you think it is cost-effective? ”

"It's a good deal! It's a great deal! This kind of small rotary tillage knife produced by the state-owned regular manufacturer costs 6 yuan for a knife, and the cost of making 5 knives in our factory is not worth the money to buy a knife! If the knife we produce can plough 200 acres, then we can plough 1,000 acres with the money to buy a knife and make 5 knives, which can be half cheaper! In addition, when settling the wages of the members, they can also settle a part of the payment in kind such as food, so that the commune can save a lot of cash and use it to buy other materials! Of course it's a good deal! ”

Director Fan excitedly calculated the economic accounts, he was the financial captain of the Xiangyang Brigade of Tonglin Commune in his early years, if it weren't for his economic acumen, it would not be his turn to be the director of Tonglin Machinery Repair Factory.

"However, we have tried more than a dozen times with different methods and have failed to succeed...... Master Zuo on the side was a little unconvinced: "Master Xiao Zhou, do you have any good way?" ”

"Yes, ploughing 200 acres is not just a matter of words." Listening to Master Zuo's words, Director Fan also suddenly woke up from the excitement just now, these days have tried to produce so many batches of rotary tillage knives, no batch of knives can persist until the completion of 50 acres of ploughing.

"Hehe, I know that you are short on time and have a heavy task right now, so I won't waste your precious time here." Zhou Jianhua said lightly: "Today, I really just need to say it to make your wishes come true." ”

The whole room was silent, surprised, suspicious, happy, and appreciative...... All kinds of emotions are mixed in this small space, just waiting for the moment when the mystery is revealed.

Zhou Jianhua groaned slightly, and then said in a deep voice to Director Fan and Master Zuo:

"I don't care what you did before, from now on, operate according to my requirements - let's talk about the manual hot forging process first, this process should pay attention to two points, first, the number of repeated hot forging is not too much, and strive to form within five hot forging. 60Si2Mn spring steel is not as brittle as ordinary carbon steel, and the number of hot forgings is more, which will reduce the strength. Second...... Xue Ying, you go and help Master Zuo find a pen. ”

Zhou Jianhua saw that Master Zuo took out a ballpoint pen and wanted to write down his words, but he couldn't write and was so anxious to scribble on the paper, so he temporarily stopped and asked Cai Xueying to help find a pen.

"Oh!" Cai Xueying didn't say a word, immediately put down the dishes and chopsticks and ran out of the living room, and soon took two pens and paper from the next room, and gave one to Director Fan and Master Zuo.

Zhou Jianhua continued: "Second, before the end of manual forging, the surface smoothness of the knife should be a little higher, and try not to have too obvious unevenness. After cooling, use a fine grinding wheel to grind flat, but the grinding thickness should not exceed 1 mm, so it is required to minimize the unevenness of the surface before the end of the previous forging process. ”

Zhou Jianhua paused in order to take care of the recording speed of the two.

"We've been forging more than a dozen times before, is it really wrong...... In the past, the grinding after forging was polished with a coarse grinding wheel, and the thickness of the grinding often exceeded 1 millimeter...... "Seeing that Zhou Jianhua gave a detailed process improvement plan so confidently, Master Zuo couldn't help but start reviewing their previous process methods.

"Hehe, if the surface of the forging part is polished too much, the fine metal structure of the metal surface will be uneven, which will have a great impact on the strength and wear resistance of the material...... "Zhou Jianhua explained simply, he knew that for these masters who have never learned the theory of metal heat treatment, if you want to talk to them about martensite, austenite, and drostenite, then they are probably listening to the book of heaven, and it is meaningless.

"Secondly, let's talk about the heat treatment link, this is the point!" Zhou Jianhua continued:

"First, after forging, the rotary tiller is first quenched as a whole, and the quenching temperature can be between 850 and 870 degrees, and the heat preservation is 5 minutes, and oil quenching is used; Second, temper the handle of the rotary tiller at medium temperature to 420 to 470 degrees, and be careful not to lower than 400 degrees! Keep warm for 35 minutes; Third, the rotary tiller blade is tempered at a low temperature of 180 to 230 degrees, remember that it must not exceed 250 degrees! Keep warm for 25 minutes. ”

Zhou Jianhua finished the main parameters in one breath without any further explanation, and now any further theoretical explanation to them can only make them more confused and meaningless, and the most appropriate way at present is to tell them how to do it.

After a pause, Zhou Jianhua asked again, "How is it?" Have you memorized everything, and are there any questions? ”

Master Zuo and Director Fan exchanged glances with each other, and then shook their heads at Zhou Jianhua.

"Hmmm! That's it! You can follow what I said, and if you have any questions after you are done, you can come back to me. Zhou Jianhua said to the two of them with a smile.

Director Fan and Master Zuo were both shouting in their hearts at this time: Where did this god come from! If the method he said is effective, then he is really a living immortal, and he only gives such a clear and specific process method with just one mouth. As Secretary Cai's guest, and in front of Secretary Cai, this young man shouldn't be talking nonsense, but if the method he said really works, then this person is too godly!

Director Fan looked at Cai Zhongming again, Cai Zhongming nodded slightly and said: "Xiao Zhou still has some experience in this area, you might as well try it first as he said, if this can solve the problem, of course, it's good, if it still doesn't work, then find another way." Cai Zhongming didn't know the bottom in his heart, so he didn't say it all, it's always okay to give it a try.

"Good! We will go back to the factory tonight and try to make it according to Master Xiao Zhou's method...... After that, we will test it in the field for a few more days, and I will report back to you as soon as I have the results! After Director Fan finished speaking, he got up with Master Zuo to say goodbye and left in a hurry.

"Zhou Jianhua, you are too powerful! You know all such profound knowledge?! Cai Xueying flashed her big watery eyes and looked at Zhou Jianhua excitedly and exclaimed.

Everyone was talking about business just now, Cai Xueying didn't speak, but she kept listening carefully, although she didn't understand much, she completely believed what Zhou Jianhua said, and believed that he would definitely be able to solve this problem. Zhou Jianhua is so confident, every time he appears, he will show amazing things, where is this a young man who has not graduated from junior high school, he is simply a knowledgeable and talented scientific and technological worker!

"Hehe, I just happen to know a little bit about this." Zhou Jianhua looked at Cai Xueying with a smile and said.

"Xiao Zhou is deeply hidden!" Cai Zhongming said: "If this technical problem can be solved, you will have made another great contribution to our Tonglin Commune!" ”

"Dad! Are you going to give him a bonus too?! Cai Xueying immediately asked excitedly.

"Hahaha...... Ah! If that happens, I'd love to give him a bonus! Belch...... That's the kind of thing...... It is indeed a commendable thing......" Cai Zhongming was suddenly attacked by his daughter, and in front of Zhou Jianhua, he didn't know for a moment that he should continue.

"Secretary Cai, in fact, it's nothing, I just happened to meet it, it's just a gesture, it's not worth mentioning, this little thing has to say bonuses, praises and the like, then I will see the outside." Zhou Jianhua knew that Cai Zhongming would definitely be embarrassed, if this matter made him unhappy, it would be embarrassing to get along again, so he hurried to relieve him.

As the secretary of the commune party committee, Cai Zhongming is strictly speaking only an intra-party position, and it is not appropriate to involve too much in administrative affairs, not to mention that things like bonuses are mainly things in the enterprise. If it is necessary to reward anyone in the capacity of the secretary of the commune party committee, it must be based on relevant policies. Therefore, asking Cai Zhongming to issue bonuses seems to be a trivial matter, but it is not realistically feasible.

Cai's mother also glanced at her daughter with disgust at this time: "Adults are talking about business, and you are also coaxing!" ”

"Xueying, Xie Lu thank you for your kindness! However, I will definitely have a lot of places to ask you for help in the future, and there will be a long time to come, so there is no hurry! Hehe...... "Zhou Jianhua felt that Cai Xueying should be comforted, and he couldn't let her be criticized by her mother in order to apply for a bonus for herself, but she didn't give her a little comfort."

"You see how sensible Xiao Zhou is, you have to learn more from Xiao Zhou!" Cai's mother praised Zhou Jianhua while educating her daughter. Zhou Jianhua showed his domineering spirit in front of everyone just now, so that Cai's mother didn't dare to underestimate him.

At this time, everyone had already finished eating, and Zhou Jianhua saw that it was not early, and the sky had already darkened, so he hurriedly said goodbye to Cai Zhongming's family.

When the cart went out, naturally Cai Xueying sent him out of the hospital, and before getting into the car, Zhou Jianhua took out two pieces of chocolate from his bag and handed them to Cai Xueying and jokingly said: "Xueying, this is the bonus you used to help me apply for the bonus." ”

"I don't want it...... I didn't apply for the bonus," Cai Xueying said wryly: "No merit will be punished!" ”

"It's okay! When you eat, just remember that your brother gave it to you. Zhou Jianhua said with a sly smile.

"You're here to make me cheap again, I'm bigger than you, okay?! You have to call me sister! Cai Xueying pouted dissatisfiedly.

"Your mother said that you are not as sensible as me, and said that you want to learn from me, how can you be qualified to be a sister?"

"My mother hit me, and you came to bully me......" Cai Xueying pursed her lips and turned around coquettishly.

"Where did I bully you? When your mother blamed you just now, didn't I speak for you? If I didn't treat you as a sister, why would I protect you like this? ”

"Humph! I don't want you to protect me as a sister, I don't have that blessing," Cai Xueying said this, but a trace ......of warmth arose in her heart.

"Who said no, you see the chocolate I bought for my sister, you also have a share." Zhou Jianhua took Cai Xueying's hand and stuffed the chocolate into her palm.

Cai Xueying was suddenly grabbed by Zhou Jianhua's wrist, nervously trying to break it but couldn't break away, so she had to take it in a hurry, and Zhou Jianhua let go.

Cai Xueying's heart jumped wildly, her face was also hot, she was holding chocolate in her hand, she couldn't speak nervously, she thought, fortunately, it's dark, if it was daytime, Zhou Jianhua would definitely find that his face was as red as a persimmon.

"Remember! You're my sister! Zhou Jianhua has already flown into the car: "See you again Xueying!" ”

Cai Xueying reacted nervously for a long time and shouted at Zhou Jianhua's distant back: "You ride slowly, be careful on the road!" ”。

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