ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2010, Vol. 31 ›› Issue (2): 60-62.

• 组织和性能 • 上一篇    下一篇

变形温度对弹簧钢55SiCrA组织和性能的影响

肖金福, 刘雅政, 孙小军, 吕 鹏   

  1. 北京科技大学材料科学与工程学院,北京100083
  • 收稿日期:2009-09-28 出版日期:2010-04-01 发布日期:2022-11-17
  • 作者简介:肖金福(1971-),男,博士研究生,工程师,1994年北京科技大学毕业,弹簧钢、易切削钢工艺研究。

Effect of Deforming Temperature on Structure and Properties of Spring Steel 55SiCrA

Xiao Jinfu,  Liu Yazheng,  Sun Xiaojun, Lii Peng   

  1. School of Material Science and Engineering, University of Science and Technology, Beijing 100083
  • Received:2009-09-28 Published:2010-04-01 Online:2022-11-17

摘要: 通过Gleeble-1500热/力模拟试验机,采用光学、电子显微技术及力学测试等方法,研究了800~950℃变形温度对汽车悬架用弹簧钢55SiCrA(%:0.56C、1.42Si、0.68Cr)组织和性能的影响。结果表明,随着变形温度的提高,相变开始温度和相变结束温度均逐渐下降,珠光体片层间距逐渐减小,变形温度为850~900℃时,珠光体片层间距为130~140 nm,抗拉强度为1 075~1 090 MPa,断面收缩率43.5%~44.0%,综合力学性能最佳。

关键词: 弹簧钢55SiCrA, 变形温度, 组织, 力学性能

Abstract: The effect of deforming temperature 800 ~950 ℃ on structure and mechanical properties of steel 55SiCrA (% : 0. 56C, 1. 42Si, 0. 68Cr) for auto suspension spring has been studied by Gleeble-1500 thermo/mechanical simulator and using optical, electron microscopy and mechanical property test. Results show that with increasing deforming temperature, the starting and finishing temperature of pearlite transformation gradually drop and the spacing of lamellar in pearlite decreases ; with defonning temperature 850 ~ 900℃, the spacing of lamellar in pearlite is 130 - 140 nm, and the steel has best comprehensive mechanical properties i. e. tensile strength 1 075 ~ 1 090 MPa with reduction of area 43. 5% 〜44. 0%.

Key words: Spring Steel 55SiCrA, Deforming Temperature, Structure, Mechanical Property