优化V/Mo-修改的0.22C-5.24Mn钢的强度和性,通过短期的部分奥氏体化工艺
Haoqing Zheng1, Gang Liu2,3, Shuai Tong2
1State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group, Panzhihua 617000, China.
Materials (Basel, Switzerland)
|April 9, 2024
概括
这项研究优化了V/Mo轴承钢使用短时间部分奥氏体化 (SPA). 该SPA工艺实现了高收益强度 (1097MPa) 和优异的低温性 (33.3J在-20°C) 的平衡.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是一种金工业.
- 物理金学 物理金学
背景情况:
- 在先进的钢中,在高度强度和低温性之间取得平衡是一个重大挑战.
- 传统的热处理通常会在优化另一种性能时损害一种特性.
- 具有V/Mo轴承的先进高强度钢 (AHSS) 具有潜力,但需要量身定制的加工.
研究的目的:
- 为了研究短时间部分度化 (SPA) 过程对V/Mo轴承0.22C-5.24Mn钢的微观结构和机械性能的影响.
- 为了实现收益强度和低温性的协同改进.
- 了解沉形态和多相层次微观结构的作用.
主要方法:
- 应用短时间部分奥氏体化 (SPA) 工艺.
- 铁矿,反向奥氏体 (RA) 和二次马氏体 (SM) 的微结构特征.
- 在临界间和SPA期间分析 (V,Mo) C沉物形态演变.
主要成果:
- 在SPA过程中,微结构从双相铁和RA转变为包括铁,RA和SM在内的多相结构.
- (V,Mo) C沉物的形态从圆盘形变为近球形.
- 一个具有不同层次 (铁矿,SM,RA) 的层次结构的微观结构,使得在-20°C时的收益强度为1097 MPa,总延长率为14%,冲击能量为33.3 J.
- (V,Mo) C降水对整体强度的贡献大约为108 MPa.
结论:
- 在V/Mo轴承钢中创建一个多相层次的微观结构时,SPA过程是有效的.
- 这种微观结构使得高产强度和低温性的优秀组合成为可能.
- 优化的沉物形态和层次结构是提高机械性能的关键.
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