Effect of Sulphide on Fatigue Crack Initiation of W6Mo5Cr4V2 Cold Ring-rolling Mandrel
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摘要: 硫化物夹杂对疲劳裂纹源萌生的影响有正负二重性。分析了硫化物形状、尺寸、分布和力学性能对高速钢W6Mo5Cr4V2冷轧芯辊疲劳断裂的作用。认为质软硫化物能够对脆性夹杂物起到包裹、缓冲过渡作用,减缓硬脆非金属夹杂物对基体产生的嵌镶应力,阻止疲劳裂纹的萌生。但其对基体的割裂作用依然存在。
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关键词:
- 硫化物 /
- 高速钢W6Mp5Cr4V2 /
- 冷轧芯辊 /
- 裂纹萌生
Abstract: There is plus-minus duplicity in the effect of sulplide inclusion on fatigue crack initiation.The effect of sulplide shapes,size,distribution and mechanical property on the fatigue fracture of high speed steel W6Mo5Cr4V2 cold ring-rolling mandrel is analyzed.It is considered that soft sulplide has some effects on brittle inclusion,such as encapsulation and buffering.These effects could slow up the mosaic stress of hard brittle non-metal inclusion to the matrix and inhibit the initiation of fatigue crack,however the inelusian still acts as rending to the matrix.-
Key words:
- sulphide /
- high speed steel W6Mo5Cr4V2 /
- cold ring-rolling mandrel /
- fatigue crack
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