设计了一种低碳贝氏体型高强度工程机械用钢,并采用快速冷却工艺进行厚度12 mm的Q800D钢的轧制试验,研究了冷却速率对钢板组织、强度和韧性的影响.结果表明,随着钢板冷却速率的增加,小角度晶界和大角度晶界密度均有较大提高,钢板强度和韧性有明显改善.当钢板冷却速度为80℃/s时,钢板综合性能达到国标Q800D级别的要求.另外,在考虑到晶界和M/A组元对韧性影响的基础上计算了不同冷却速度钢板的韧性参数,韧性参数随冷速的变化趋势与-20℃冲击功随冷速的变化趋势一致,两者有良好的相关性.
参考文献
[1] | XIE Bao-sheng;CAI Qing-wu;YU Wei et al.Effect of tempering temperature on resistance to deformation behavior for low carbon bainitic YP960 steels[J].Materials Science and Engineering A,2014,618:586-595. |
[2] | Nagao A;Ito T;Obinata T .Development of YP960 and1100MP a class ultra high strength steel plates with excellent toughness and high resistance todelayed fracture for const ruction and industrial machinery[J].JFE Technical Report,2008,11:13-18. |
[3] | 陈雨来,张栋斌,余伟,郭锦.超快冷工艺对X70管线钢组织的影响[J].北京科技大学学报,2013(02):184-188. |
[4] | 王根矶,李婧,何元春,赵德文,刘相华.低合金厚板的减量化轧制[J].钢铁,2009(08):60-63. |
[5] | 谢保盛,蔡庆伍,余伟,刘涛,李晓林.快速冷却工艺对Q420E钢板性能的影响[J].材料热处理学报,2014(03):97-104. |
[6] | 谢保盛,蔡庆伍,余伟,曹嘉明,李瑞.回火温度对低碳贝氏体型Q960钢力学性能的影响[J].材料热处理学报,2014(05):123-130. |
[7] | 赵琳,张旭东,陈武柱.激光焊接800MPa级RPC钢接头组织特征[J].应用激光,2004(06):371-374. |
[8] | 仝珂,庄传晶,刘强,韩新利,朱丽霞,何小东.高钢级管线钢中M/A岛的微观特征及其对力学性能的影响[J].机械工程材料,2011(02):4-7. |
[9] | 廖波,肖福仁.针状铁素体管线钢组织及强韧化机理研究[J].材料热处理学报,2009(02):57-62. |
[10] | 刘莉,赵亚娟,王秀芳.高强度微合金管线钢中的MA岛对性能的影响[J].南钢科技与管理,2008(01):1-5. |
[11] | Morito S;Yoshida H;Maki T et al.Effect of block size on the strength of lath martensite in low carbon steels[J].Materials Science and Engineering A,2006,438-440:237-240. |
[12] | Zhu K;Bouaziz O;Oberlillig C;e t al .An approach to define the effective lath size controlling yield strength of bainite[J].Materials Science and Engineering A,2010,527:6614-6619. |
[13] | Kuhlmann-Wilsdorf D .The theory of dislocation-based crystal plasticity[J].Philosophical Magazine A:Physics of Condensed Matter Defects and Mechanical Properties,1999,79:955-1008. |
[14] | Raj S V;Pharr G M .A compilation and analysis of data for the stress dependence of the subgrain size[J].Material Science and Engineering,1986,81:217-237. |
[15] | Z. Guo;C. S. Lee;J. W. Morris .On coherent transformations in steel[J].Acta materialia,2004(19):5511-5518. |
[16] | 赵琳,张旭东,陈武柱.800 MPa级低合金钢焊接热影响区韧性的研究[J].金属学报,2005(04):392-396. |
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%