Chapter 245: Thermal Spray

Cui Hongchun also had no choice but to treat the rotary blade as a life-saving straw. The best way to make the superior leaders see the results in the shortest time is to show their face at such an international exhibition. Based on the level of agricultural machinery technology in China at that time, it is undoubtedly very difficult to win prizes in this kind of competition. However, the rotary blades of Qingfeng Plant gave Cui Hongchun a glimmer of hope. After all, this kind of blade can penetrate the Japanese market. Although its service life has only reached the average level of similar products in Japan, but with such a foundation, can we work hard to create a miracle?
Cui Hongchun doesn't have much confidence in this point, so he needs to ask Chen Heqian and Qin Hai for evaluation. He had already figured out that as long as the two thought it was possible, he would try his best to satisfy whatever conditions were needed. To put it bluntly, all he has to do is a performance project. This is the case in China. As long as this performance project is completed, the follow-up work will be smooth.
"This ... I'm afraid it's a bit difficult." Chen Heqian frowned, pouring a cold water on Cui Hongchun.
"What's the difficulty, Professor Chen, please." The muscles on Cui Hongchun's face twitched slightly, but still asked Chen Heqian calmly.
Chen Heqian said: "I have not personally observed the blades of the rotary cultivator of the Qingfeng Plant, but I heard Xiao Qin introduce me to the entire process. The Qingfeng Plant can increase the service life of the blades of the rotary cultivator by nearly 500 acres. There are two main improvements. First, they re-smelted the purchased steel to increase the strength of the steel. Second, they introduced a high-frequency surfacing process to cover the cutter head with a layer of highly wear-resistant metal. . "
"Well. Xiao Qin also introduced this to me." Cui Hongchun nodded.
Chen Heqian continued: "To further improve the durability of the blade, we still start from these two aspects. One is to further improve the steel formula, and the other is to improve the solder composition of the surfacing. According to my understanding, Qingfeng Factory Some attempts have been made in this respect, and what they are able to do now is already the ultimate of them. Of course, there may be some improvements in the future, but it is very difficult to greatly improve. "
"Xiao Qin. Is that so?" Cui Hongchun turned to Qin Hai and asked.
Qin Haidao: "I gave a rough idea. Without a significant increase in cost, there is little room for improvement in blade steel. Surfacing welding can be optimized, but this requires experimentation. If all goes well, we It is possible to increase the service life of the blade from the current 1200 acres to about 1,500 acres, reaching a higher level of similar products on the Japanese market. But ... "
"1500 acres ... This level is completely incomparable with the international advanced level." Secretary Li Yang answered coldly. Cui Hongchun has been pondering this matter these days. As a secretary, Li Yang naturally had to study this issue in depth. 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 only 1,500 acres were taken out by Qin Hai, there would be no competition.
When Qin Hai said "but", he was actually thinking about this issue. He knows that the better rotary tiller blade life in the Japanese market is about 1500 acres, but this is only a product sold in the market. The highest-end technology owned by the manufacturer certainly does not stop there. For this gap, he is helpless, because the more he goes to the high end, the more precise technical details are needed, which cannot be solved by the memory fragments he brought from later generations.
In terms of overlay welding technology. He knows how to use this technology, but is specific to the formulation of the solder. He can only explore constantly. Foreign manufacturers have been exploring this area for many years. Compared with others, the gap between the Qingfeng factory and the others is too great.
"Secretary Li, as far as you know, how long does the service life of the rotary tiller blades reach in order to be able to get a better place in international competitions?" Qin Hai asked Li Yang.
"Not less than 2000 acres." Li Yang said, adding, "I am also limited to the information available through public channels. I think that if you participate in the competition, maybe some manufacturers can get To produce 2500 acres or more. "
"This means that we have to double the current level, this ... it is almost impossible." Chen Heqian said. He also deliberately made the difficulty higher so that Cui Hongchun would not put too much pressure on Qin Hai.
"Double it again ..." Qin Hai groaned.
"The ministry can provide you with all the necessary conditions." Cui Hongchun reminded that he also started to retreat a little bit, but since Qin Hai hasn't resigned explicitly, he still wants to work harder. In his heart, he felt that Qin Hai might be a man who could create miracles.
"If you want to double it again, it won't be done by the overlay welding process." Qin Hai said gently.
After hearing this, Cui Hongchun was a little disappointed, but Chen Heqian brightened his eyes: "Xiao Qin, you mean, do you consider using other crafts?"
Surfacing is just one of the ways to improve the wear resistance of the tool. Since Qin Hai said that surfacing cannot be achieved, it means that other processes are still possible. Only people like Chen Heqian who have enough understanding with Qin Hai can hear the subtexts in Qin Hai dialect.
Qin Hai smiled, concealed and said, "I have some ideas, but I am still very immature."
In fact, Qin Hai had thought of an excellent solution at that moment, but it was not convenient for him to speak out in public. Because this solution involves a new material technology that is still very immature: thermal spray technology.
Rotary blades are used for arable land. Although the material of the blades is steel, if they are rubbed in the soil for a long time, they will still wear until they are scrapped. In order to improve the wear resistance of the blade, some highly wear-resistant materials need to be attached to the blade tip. This kind of material is not difficult to find, the difficulty is how to glue this material with the knife body.
Qin Hai's previous overlay welding technology is a method of bonding materials. The principle of this method is to mix the wear-resistant material and iron powder into solder, then apply the solder on the blade, and apply high temperature to melt the solder to fuse with the blade body.
The wear-resistant materials used in surfacing technology have higher wear resistance than ordinary steels, but they are far from the ideal level. In the field of materials, the best wear-resistant material is ceramic. If ceramic can be used as the edge material, the wear resistance of the blade will be doubled.
The problem is that although people know that ceramics can improve wear resistance, they can't find a way to combine ceramics with steel. The melting point of ceramics is much higher than that of metals and cannot be processed by the overlay welding process. In those years, the United States and Britain and other countries have already developed ceramic-made cutter heads, but they can only be adhered to the cutter with high-strength resin. The abrasion resistance of this sticky cutter head is enough, but it is conceivable that its impact resistance is very weak. After all, the strength of resin bonding and welding are incomparable.
Thermal spraying technology is another kind of material coating technology. Its principle is very simple to say, that is, spraying materials such as ceramic particles are heated to a plastic or molten state, and then sprayed onto the pretreated substrate surface. On the premise that the substrate remains unmelted, the spraying material is attached to the substrate to form a coating with special properties.
To put it simply, it is equivalent to loading the material to be attached in a gun and launching it towards the substrate, so that the material is injected into the substrate like a bullet to form a coating.
The origin of spraying technology can be traced back to 1909, a young Swiss invented the spraying technology of zinc metal. In the following seventy to eighty years, spraying technology has been developing, and it has taken the lead in a wide range of applications in the aviation and aerospace fields. But at this stage, the spraying process is still very complicated, especially the technical requirements for forming ceramic coatings are still very high, and it is limited to use in high-end equipment manufacturing.
In 1982, the United States sks company developed the technology of using high-speed flame spray guns to achieve thermal spraying, which lowered the threshold for thermal spraying. In the following ten years, the high-speed flame spray gun spraying technology has been greatly developed, so that the thermal spraying technology has stepped off the altar and began to enter the field of production of ordinary products.
Qin Hai is very familiar with this history of technology development. He knows that countries around the world are still in the exploration stage of thermal spray technology, and it is hardly possible to use such high technology on such incompatible products as agricultural machinery. If he can take the lead in applying this technology, then he can put his competitors far behind by virtue of the technical generation difference.
If you can really stand out in the basics competition, for Cui Hongchun, you can earn a great honor, and for Qin Hai, you can make your own technology brand, so that it will take the lead in terms of thermal spraying technology. machine. The agricultural machinery market is actually a very small market. Once the thermal spray process is widely used, its market value is inestimable.
Such an idea, of course, Qin Hai will not disclose to Cui Hongchun in advance. Based on Chen Heqian, he does not want to explain in advance ~ EbookFREE.me ~ I wonder if the old gentleman will get a vote by himself when he is excited. Did it? Qin Hai's belly contained numerous technical essentials of thermal spraying. He didn't want to give Chen Heqian such a piece of fat for no reason.
Cui Hongchun guessed Qin Hai's thoughts. He is also helpless for this young man who has a lot of money in his head. If Qin Hai had any political requirements, he could exchange political interests with Qin Hai, but now it seems that Qin Hai has no intention of doing so, and he has no better way.
"Xiao Qin, are you really sure you can come up with a knife that can participate in the competition within three months?" Cui Hongchun asked.
"It's 80% certain." Qin Hai said quietly. When he thought of the thermal spraying process, he knew that he had at least 99% confidence that he could get a place in the competition. Unless the world changed, foreigners also solved some core problems in this process in advance. So come up with the same product. (To be continued. If you like this work, you are welcome to come to the starting point to vote for referrals and monthly passes. Your support is my greatest motivation. For mobile users, please read m.)
ps: Some of the material technology is definitely not what Du Niang said. It is summarized by Orange while reading a book. I hope nothing is wrong. Too detailed technical details, let's forget about it, novels, no big mistakes. ()