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gcr6 gang si zhui re chu li gong yi de gai jin
Author(s): 
Pages: 49-50
Year: Issue:  5
Journal: Heat Treatment of Metals

Keyword:  热处理工艺平均使用寿命脆性断裂离合器机用丝锥失效形式原工艺退火组织工艺跟踪材料检验;
Abstract: <正> 某离合器厂以前一直用GCr6钢生产φ4mm机用丝锥,其平均使用寿命每根可达100次。后来新进一批GCr6钢材,按原工艺制造,其使用寿命下降到60次以下,失效形式为脆性断裂。原热处理工艺如下:淬火,在箱式炉中加热830~850℃,保温6~8min;回火,柄部280℃,HRC50~55,工作部分150℃,HRC56~60。通过工艺跟踪和原材料检验发现,原材料退火组织中的碳
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