低碳贝氏体钢受控冷工艺的影响会得到不同类型的组织,在较慢速冷却时,在奥氏体中先形成针状铁素体,残余奥氏体会被包裹在铁素体之中,形成粒状贝氏体团.工业轧制试验表明,不同控制冷却工艺可得到两类组织,一类出现黑珠组织(富碳马氏体组织),具有该组织的钢轧态冲击韧性低.另外一类为细化的板条贝氏体组织,具有该组织的钢轧态强度高,冲击韧性好,但伸长率不足.通过回火处理,存在黑珠组织钢的冲击韧性能得到提高,超细化板条贝氏体组织钢的伸长率也能得到改善,但后者屈服强度会比前者高100MPa左右.
参考文献
| [1] | Krauss G;Thomposon T W .Ferrite Microstructure in Continuously Cooled Low and Ultralow Carbon Steels[J].ISIJ International,1995,35:937-945. |
| [2] | Y.M. KIM;S.K. KIM;Y.J. LIM .Effect of Microstructure on the Yield Ratio and Low Temperature Toughness of Linepipe Steels[J].ISIJ International,2002(12):1571-1577. |
| [3] | Rodrigues P C M;Pereloma E V;Santos D B .Mechanical Properties of an HSLA Bainitic Steel Subjected to Controlled Rolling with Accelerated Cooling[J].Materials Science and Engineering,2000,A283:136-143. |
| [4] | 尚成嘉,王学敏,杨善武,贺信莱,武会宾.高强度低碳贝氏体钢的工艺与组织细化[J].金属学报,2003(10):1019-1024. |
| [5] | Bai D Q;Yue S;Maccagno T M et al.Continuous Cooling Transformation Temperatures Determined by Compression Tests in Low Carbon Bainitic Grades[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1998,29A:989-1001. |
| [6] | Pontremoli M.Metallurgical and Technological Challenges for the Development of High-performance X100-X120 Linepipe Steels[A].上海,2004:39-45. |
| [7] | 杨善武,尚成嘉,王学敏,贺信莱.低碳微合金钢微细板条状组织在单向拉伸中的反常转动[J].金属学报,2003(06):579-584. |
| [8] | 尚成嘉,杨善武,王学敏,贺信莱.新颖的贝氏体/铁素体双相低碳微合金钢[J].北京科技大学学报,2003(03):288-290. |
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%