通过光镜、扫描电镜分析以及拉伸试验研究了高马氏体量双相钢(马氏体体积分数大于30%)在不同热处理条件下的显微组织和拉伸性能,并进一步探讨了其断裂机理.结果表明,随着两相区保温温度的升高,马氏体体积分数不断升高,导致强度不断提高.马氏体体积分数较低时,钢的断裂特征为韧性断裂;马氏体体积分数较高时,则会转变为脆性断裂.微孔在断裂表面附近形成.微孔的形态随着马氏体的比率而变化,随着马氏体体积分数的升高,微孔形态从界面结合力的丧失转为微裂纹.
参考文献
[1] | 马鸣图;吴宝榕.双相钢-物理和力学冶金[M].北京:冶金工业出版社,1988:6. |
[2] | Lagneborg R.Dual-Phase and Cold Pressing Vanadium Steels in the Automobile Industry[A].Berlin,Germany,1978 |
[3] | Kot R A;Morris J W.Structure and Properties of Dual-Phase Steels[M].New York:AIME,1979 |
[4] | Kot R A;Bramfitt B L.Fundamental of Dual-Phase Steels[M].New York:AIME,1981 |
[5] | Kang S;Kwon H .Fracture Behavior of Intercritically Treated Complex Structure in Medium-Carbon 6 Nickel Steel[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1987,18A:1587. |
[6] | Bag A;Ray K K;Dwarakasa E S .Influence of Martensite Content and Morphology on Tensile and Impact Properties of High-Martensite Dual-Phase Steels[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1999,30A:1587,1193. |
[7] | Davenport A T.In Formable HSLA and Dual Phase Steels[M].New York:AIME,1979 |
[8] | 熊光耀,邹瑞.微孔对双相钢抗拉性能的影响[J].国外金属热处理,2004(02):23-26. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%