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喷吹工艺对GCr15轴承钢K1c和ΔKth的影响及裂纹尺寸的估算

The effect and estimation of crack size of SL technology on K1c and ΔKth of bearing steel GCr15

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【作者】 郑淑玲张兰萍

【Author】 ZHENG Shu-ling, ZHANG Lan-ping (Jixi University,Jixi 158100,China)

【机构】 鸡西大学鸡西大学 黑龙江鸡西158100黑龙江鸡西158100

【摘要】 对SL(钢包喷吹Ca-Si粉 )工艺和CAB(钢包吹氩 )工艺轴承钢GCr15的K1c和ΔKth进行了测定 ,并对裂纹失稳扩展的临界尺寸和亚稳扩展的起始尺寸进行了估算。结果表明 :采用SL工艺的GCr15钢K1c和ΔKth均有所提高 ;裂纹失稳扩展和临界尺寸和亚稳扩展的起始尺寸是CAB工艺的 2倍。

【Abstract】 The K 1c and ΔK th of bearing steel GCr15 by SL and CAB processing were measured.The critical dimension of crack quick propagating and the initial dimension of crack sub-propagating were estimated.The results show that the K 1c and ΔK th of steel GCr15 can be improved by SL technology.The critical dimension of cracks quick propagating and the initial dimension of cracks sub-propagating of SL technology are double times than CAB technology.

  • 【分类号】TG142.4
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