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由于GCr15钢轴承零件对内部组织、力学性能和尺寸精度的要求都比较高,因此对原材料必须进行严格的低倍组织检查.十几年来,对进厂的原材料均根据相应的技术条件进行检查验收.对直径大于或等于30mm的热轧材,在钢材的一端用切割机或手锯切取厚度为12～15mm的试样,试样被检面需磨平整;对钢丝盘料,在头部先切去500mm后,再切取长度250～300mm的试样,进行热酸蚀检查.酸浸液为50%的工业盐酸水溶液,酸洗温度为70±5℃,酸浸时间30～40min,然
Since GCr15 steel bearing parts on the internal organization, mechanical properties and dimensional accuracy requirements are relatively high, so raw materials must be strict low magnification inspection. Over the past decade, the raw materials into the plant are based on the appropriate technical conditions for inspection and acceptance For the diameter greater than or equal to 30mm hot-rolled material, one end of the steel with a cutting machine or hand saw cut a thickness of 12 ~ 15mm sample, the test surface to be polished; the wire reel, the first in the head Cut 500mm, and then cut the length of 250 ~ 300mm of the sample, the thermal etching test acid pickling solution of 50% aqueous hydrochloric acid, pickling temperature of 70 ± 5 ℃, pickling time 30 ~ 40min,