• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 1990, Vol. 26 ›› Issue (2): 52-56.

• 论文 • 上一篇    下一篇

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70Cr3Mo冷轧支承辊钢的氢致脆化研究

廖波;康大韬;陈廉;刘民治   

  1. 东北重型机械学院;中国科学院金属所;成都科技大学
  • 发布日期:1990-03-01

HYDROGEN-INDUCED EMBRITTLEMENT OF COLD SUPPORTING ROLL STEEL 70Cr3Mo

Liao Bo;Kang Datao;Chen Lian;Liu Minzhi   

  1. Northeast Heavy Machinery Institute Institute of Metal Research,Academia Sinnica Chengdu University of Science and technology
  • Published:1990-03-01

摘要： 本文通过对系列氢含量试样的缓慢拉伸试验，研究了70Cr3Mo冷轧支承辊钢的氢致脆化。得到结果如下：（1）随钢中氢含量的增加和应变速率的减慢，钢的塑性急剧下降。当钢中氢含量达6ml/700g，应变速率达3×10 -5s -1时，70Cr3Mo钢的塑性几乎完全丧失；（2）70Cr3Mo钢的无白点极限含氢量为3ml/100g，无氢脆极限含氢量为1.48ml/100g；（3）缓慢拉伸白点为与基体组织有明显交界的近椭圆斑点，其内部显微形貌的以凸起，走向比较明确的撕裂岭和短小，弯曲的准解理小平面构成的穿晶准解理。

关键词: 白点, 缓慢拉伸, 冷轧辊钢

Abstract: The Hydrogen-induced embrilttlement of cold supporting roll steel 70Cr3Mo was studied by means of slow tensile of specimen with various hydrogen contents. The results show: (1)with the increase of hydrogen contents in the steel and the retardation of strain rate, its plasticity drops sharply till almost wholly lost when hydrogen was 6ml/100g and strain rate was down to 3×10 -5s -1.(2)The hydrogen content of the steel to free flack or hydrogen-included embitterment is limited to 3.0 or 1.48ml/100g respectively .(3)The flack is slow tensile test specimen revealed similar elliptical freckles and sharp boundaries. The micro morphology is Tran granular quasi-cleavage consisting of clear leering ridges and tiny, winding quasi-cleavage pleases.

Key words: 白点, 缓慢拉伸, 冷轧辊钢

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