Factors causing the needle roller bearing defect of jiaxing

Factors causing the needle roller bearing defect of jiaxing source: this website the author: the administrator to release time: 2017 - 04 - 06 08:40:12 views: 0 factors cause the needle roller bearing defect of jiaxing although now we production technology becomes more and more advanced, but in the production of some products, will inevitably encounter some problems, affects the quality of our product processing, just like when we make jiaxing needle roller bearing, also will encounter a lot of defects, affect the bearing quality, then we have to get to know what factors will jiaxing needle bearing quenching process for us, hope that by now, everyone at the time of purchase of needle roller bearing, can very good to identify its quality. Jiaxing needle bearing parts in the process of hardening cooling by internal stress of crack according to quenching crack. Of the cause of the crack are: due to quenching heating temperature is too high or cooling, the thermal stress and quality of metal volume change of the organization the fracture strength of stress is greater than steel, flat needle bearing the original defects on the surface of the work or steel internal defects formed during quenching stress concentration, serious surface decarbonization and carbide segregation, lack of parts after quenching tempering or failed to timely tempering, the process caused by salt stress, cold forging folding, deep turning tool and oil groove sharp edges, etc. In conclusion, the causes of quenching crack could be one or more of the above factors, the existence of internal stress is the main reason for the formation of quenching cracks. Quenching crack deep and long, fracture surface is flat, the broken section without oxidation color. It is often a longitudinal straight on bearing ring crack or circular crack, in the shape of the bearing steel ball on a s-shaped, T, or ring. The characteristics of the quenching crack is crack on both sides without decarburization phenomenon, with obvious difference between crack forging cracks and materials. In our processing the needle roller bearing in the process, there will be a lot of factors affect the quality of our product processing, processing of bearing product defects, luckily we jiaxing needle bearing factory constantly improve the production process, ensure quality of needle bearing production in jiaxing, such ability in the process of we use the role of a stable and reliable guarantee for our production work, the bearing will also get a lot of extended service life.