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Nmb miniature bearing surface quality

by:Waxing     2020-11-20
Nmb miniature bearing surface quality is not poor Nmb miniature bearing surface quality is not bad, and ask the workpiece corrosion crystal drop. When the miniature bearing parts have serious overheating coarse grains, but also increases 8 wire weight, it is easy to cause the hot working performance deterioration of parts. With lcrl8Ni9Ti tiny piece to the stainless steel body or overheating, easy to produce similar orange peel surface defects. To this end, the following prevention measures are put forward: ( 1) Nmb miniature bearing in the strict control lcrl8Ni9 stainless steel casing, micro parts, forging heating temperature and heating time of heat preservation, in order to prevent the workpiece overheating defect part of coarse grains. ( 2) Such as forging, forging production is too small, the final forging temperature is high, but also prone to coarse grain and defects, the miniature bearing forging workpiece should be more than appropriate, sufficient, finish forging temperature is moderate. ( 3) Miniature bearing the workpiece heat solid solution treatment temperature is not too high, rather than holding time is too long, the heating temperature should be not more than 11? 吗? 'C, holding time 1-50 L_5min/mm calculation is appropriate. ( 4) Nmb miniature bearing overheating a thick, grain refinement methods can be used to change the forging to eliminate defects, in order to prevent the deformation of workpiece, in a cold orange peel shape surface defects, improve the quality of the workpiece surface. This information comes from: the news / 393. 超文本标记语言
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