| 70Cr3Mo冷轧支承辊钢的氢致脆化研究 |
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| 引用本文： | 廖波,康大韬,陈廉,刘民治.70Cr3Mo冷轧支承辊钢的氢致脆化研究[J].机械工程学报,1990,26(2):52-56. |
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| 作者姓名： | 廖波 康大韬 陈廉 刘民治 |
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| 作者单位： | 东北重型机械学院;中国科学院金属所;成都科技大学 |
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| 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。
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| 关 键 词： | 白点 缓慢拉伸 冷轧辊钢 |
HYDROGEN-INDUCED EMBRITTLEMENT OF COLD SUPPORTING ROLL STEEL 70Cr3Mo |
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| Liao Bo,Kang Datao,Chen Lian,Liu Minzhi.HYDROGEN-INDUCED EMBRITTLEMENT OF COLD SUPPORTING ROLL STEEL 70Cr3Mo[J].Chinese Journal of Mechanical Engineering,1990,26(2):52-56. |
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| Authors: | Liao Bo Kang Datao Chen Lian Liu Minzhi |
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| Affiliation: | Northeast Heavy Machinery Institute Institute of Metal Research,Academia Sinnica Chengdu University of Science and technology |
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| 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. |
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