Cui Hongchun really has no choice, so he will use the rotary tillage blade as a life-saving straw. The best way to make the superior leaders see the results in the shortest possible time is to show their faces at such an international exhibition. With the level of China's agricultural machinery technology at that time, it was undoubtedly very difficult to win a prize in this kind of competition, but the blades of the rotary tiller of the Qingfeng factory gave Cui Hongchun a glimmer of hope. After all, this kind of blade can enter the Japanese market, although its service life is only up to the average level of similar products in Japan, but with such a foundation, no matter how hard you work, can you create a miracle?

Cui Hongchun didn't have much confidence in this, so he needed to ask Chen Heqian and Qin Hai to make an assessment. He had already figured out that as long as the two of them thought it was possible, he would do his best to meet whatever conditions were needed. To put it bluntly, what he wants to do is a political performance project. This is the case in China, as long as this political achievement project is completed, the follow-up work will be smooth.

"This ...... I'm afraid it's a bit difficult. Chen Heqian frowned and poured a scoop of cold water on Cui Hongchun's head.

"What's the difficulty, Professor Chen, please explain." The muscles on Cui Hongchun's face twitched slightly, but he still asked Chen Heqian extremely calmly.

Chen Heqian said: "I haven't personally observed the rotary tiller blades of Qingfeng Factory, but I heard Xiao Qin introduce me to all the processes. Qingfeng plant can increase the service life of rotary tiller blades by nearly 500 acres, mainly in two aspects. First, they re-smelted the purchased steel to improve the strength of the steel; Second, they introduced a high-frequency hardfacing process, which covered the cutter head with a layer of highly wear-resistant metal. ”

"Well, Xiao Qin also introduced this situation to me." Cui Hongchun nodded.

Chen continued: "To further improve the durability of the blade, we still start from these two aspects. First, it is necessary to further improve the steel formula. The second is to improve the solder composition of surfacing welding. As far as I know, Qingfeng has made some attempts in these two aspects, and what can be done so far is already their extreme. Of course, there may be some improvements in the future, but it will be difficult to improve significantly. ”

"Xiao Qin. Is that so? Cui Hongchun turned his head to Qin Hai and asked.

Qin Haidao: "I have roughly considered it, in the case of not being able to greatly increase the cost, there is not much room for improvement in the blade steel, and the solder for surfacing welding can be optimized, but this needs to be realized." If we have a qiē shun lì, it is possible for us to increase the service life of the blade from the current 1200 mu to about 1500 mu, reaching a higher level of similar products in the Japanese market. But ......"

"1500 acres...... This level is completely incomparable with the international advanced level. Secretary Li Yang answered coldly on the side. Cui Hongchun has been pondering this matter these days, and Li Yang, as a secretary, naturally has to conduct in-depth research on this issue. According to the information he saw, some agricultural machinery manufacturers in Japan and France have been able to increase the service life of rotary tiller blades to more than 2,000 acres. If Qin Hai only takes out 1,500 acres, he will have no strength to participate in the competition at all.

When Qin Hai said "but", he was actually thinking about this problem. He knows that the service life of the best rotary tiller blades in the Japanese market is about 1,500 acres, but this is only a product sold on the market, and the high-end technology that the manufacturer has must be more than that. He is also helpless about this gap, because the higher he goes, the more precise technical details are needed. This is not something that can be solved by the fragments of memories he brought with him from the afterlife.

In the case of hardfacing technology, he knows how to use it. But when it comes to the formula of the solder, he can only continue to explore. Foreign manufacturers have been exploring this aspect for many years, and the gap between Qingfeng and others is too big.

"Secretary Li, as far as you know, how much service life should be achieved by the blades of the rotary tiller. Is it possible to get a good ranking in international competitions? Qin Hai asked Li Yang.

"No less than 2,000 acres." Li Yang said, and after that, he added: "I am also limited to the information that can be obtained through public channels, and I think that if I participate in the competition." Maybe some manufacturers can come up with products with a life span of 2,500 acres or even longer. ”

"This means that we have to double the current level, this ...... It's almost impossible. Chen Heqian said. He also deliberately made it more difficult, so as not to put too much pressure on Qin Hai by Cui Hongchun.

"Twice as much......," Qin Hai groaned.

"The ministry can provide you with the necessary conditions." Cui Hongchun reminded that he was also starting to retreat a little, but since Qin Hai hadn't clearly backed down, he still wanted to work harder. In his heart, he faintly felt that Qin Hai might be a person who could create a miracle.

"If you want to double it again, you can't rely on the hardfacing process." Qin Hai said softly.

Hearing this, Cui Hongchun was a little disappointed, but Chen Heqian's eyes lit up: "Xiao Qin, you mean, you consider using other processes?" ”

Surfacing welding is only one of the ways to improve the wear resistance of the tool, since Qin Hai said that the surfacing process cannot be achieved, it means that other processes are still possible. Only people like Chen Heqian, who have enough tacit understanding with Qin Hai, can hear the subtext in Qin Hai's words.

Qin Hai smiled and said in disguise: "I have some ideas, but I am still very immature. ”

In fact, Qin Hai had already thought of an excellent solution at that moment just now, but it was just inconvenient to say it in public. Because this solution involves a new process of materials that is still very young: thermal spray technology.

Rotary tillage blades are used to plough the land, although the material of the blade is steel, but after long-term friction in the soil, it will still wear out until it is scrapped. In order to improve the wear resistance of the blade, it is necessary to attach some highly wear-resistant materials to the cutting tip. This type of material is not difficult to find, the difficulty is how to bond it to the cutter body.

Qin Hai's previous surfacing technology is a method of bonding materials. The principle of this method is to mix wear-resistant materials with iron powder to make solder, and then apply the solder to the cutter head, and increase the temperature to melt the solder, so as to fuse with the cutter body.

The wear-resistant materials used in hardfacing technology have higher wear resistance than ordinary steel, but they are still far from the desired level. In the field of materials, the best material for wear resistance is ceramic, if ceramics can be used as the knife edge material, then the wear resistance of the blade will be doubled.

The problem is that while ceramics are known to improve wear resistance, there is no way to combine ceramics with steel. Ceramics have a much higher melting point than metals and cannot be treated using the hardfacing process. At that time, the United States and Britain and other countries had already developed ceramic cutter heads, but they could only use high-strength resin to stick it to the cutter. The wear resistance of this kind of sticky cutter head is sufficient, but it is conceivable that its impact resistance is extremely weak, after all, the strength of resin bonding is not the same as that of welding.

Thermal spraying technology is a new way of material coating technology, its principle is also very simple, that is, the spraying material such as ceramic particles is heated to a plastic or molten state, and then sprayed onto the surface of the pretreated substrate, under the premise that the substrate remains unmelted, so that the spraying material adheres to the substrate to form a coating with special properties.

To put it more simply, it is equivalent to putting the material that needs to be attached to a gun and firing it at the substrate, so that the material shoots into the substrate like a bullet to form a coating.

The origin of spraying technology can be traced back to 1909, when a young Swiss man invented zinc metal spraying technology. In the seven or eighty years that followed, spraying technology continued to evolve and was first widely used in the field of aviation and aerospace. However, at this stage, the spraying process is still very complex, especially the technical requirements for forming ceramic coatings are still very high, and they are limited to high-end equipment manufacturing.

In 1982, SKS developed the technology of using high-speed flame spray guns to achieve thermal spraying, which lowered the threshold of thermal spraying. In the following ten years, high-speed flame spray gun spraying technology has been greatly developed, so that thermal spraying technology has stepped down from the altar and began to enter the production field of ordinary products.

Qin Hai is very familiar with this period of technology development history, and he knows that at present, countries around the world are still in the exploration stage of thermal spraying technology, and there is no way to use this lofty technology on agricultural machinery and tools. If he can be the first to apply this technology, then he will be able to rely on the generation gap in technology to leave competitors far behind.

If he can really stand out in the basic parts competition, for Cui Hongchun, he can earn a big honor, and for Qin Hai, he can play his own technical brand, so as to take the lead in the thermal spraying process. In fact, the agricultural machinery market is only a small market, and once the thermal spraying process is widely used, its market value is immeasurable.

Of course, Qin Hai would not reveal such an idea to Cui Hongchun in advance, and based on Chen Heqian, he didn't want to explain it in advance, so I wonder if this old gentleman would pull a vote of people to start doing it by himself under the excitement? Qin Hai had countless technical essentials of the thermal spraying process in his belly, and he didn't want to give such a big piece of fat to Chen Heqian for no reason.

Cui Hongchun guessed Qin Hai's thoughts, and he was also a little helpless for this young man who was all about making money. If Qin Hai had any political requirements, he could exchange the political benefits with Qin Hai, but now it seems that Qin Hai has no intention of doing this, and he has no good way.

"Xiao Qin, are you really sure that you can come up with a knife that can participate in the competition within three months?" Cui Hongchun asked.

"Eighty percent sure." Qin Hai said in a low-key manner. When he thought of the thermal spraying process, he knew that he was at least ninety percent sure that he would be able to get a place in the competition, unless the world changed, and foreigners also solved some of the core problems in this process in advance, so as to come up with the same product. (To be continued......)

PS: Some of the content on the material process, definitely not what Du Niang said, it was summarized by Orange while reading the book, I hope it is not wrong. Let's forget the technical details that are too detailed, the novel, as long as there is no big mistake.