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Produce 317h stainless steel plates, Wuxi Jinnike, 316ti stainless steel plates, cutting and retail
The high-speed steel of Wuxi Jinnike Metal Products Co., Ltd. belongs to high-alloy ledeburite steel. During the actual solidification of the ingot, due to the relatively fast cooling rate, the alloy elements do not have time to diffuse, so the transformation during the crystallization and solid-state phase transformation processes cannot be fully carried out. Usually, the as-cast structure of high-speed steel forgings consists of fishbone-shaped ledeburite, black structure and bright white structure (martensite + retained austenite). The coarse eutectic carbides in the as-cast high-speed steel structure must be repeatedly forged and drawn multiple times to break the carbides, making them become granular carbides distributed as uniformly as possible, and then stress-relief annealing is carried out to obtain a structure of sorbite and carbides. During forging, the final forging temperature should be controlled. If the temperature is too low, it is easy to cause cracking during forging; if the temperature is too high, coarse grains will be produced, forming a so-called naphthalene-like fracture.
Produce 317h stainless steel plates, Wuxi Jinnike, 316ti stainless steel plates, cutting and retail
The holding time of the high-temperature annealing process is greatly shortened, and the holding time in the cooling stage is almost eliminated, so the annealing cycle is greatly shortened. After high-temperature annealing, the hardness of high-speed steel is lower than that of ordinary annealing, the cutting performance is better, the cutting efficiency can be increased by 20%, and the cutting life of tools made of high-speed steel after high-temperature annealing is 15%-20% longer than that of tools made of high-speed steel after ordinary annealing. The special steel for manufacturing rolling bearings is called rolling bearing steel, usually referred to as bearing steel for short. The working conditions of rolling bearings are extremely harsh, basically working under high load, high speed and high sensitivity. The main forms of its failure are fatigue and wear. Therefore, rolling bearings are usually required to have high and uniform hardness and wear resistance, high contact fatigue strength, high elastic limit and certain toughness, good dimensional stability and certain corrosion resistance. In addition, for bearings working under special conditions, there are other special requirements, such as high-temperature performance, corrosion resistance, etc. In order to meet the performance requirements of bearings, for bearing steel, the correct chemical composition, high metallurgical quality and reasonable processing technology are the three main keys. Among them, heat treatment plays an important role in improving the internal quality of bearings and extending their service life.
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