C和Al合金对构成模型参数和中型Mn钢的热变形行为的影响
Guangshun Guo1, Mingming Wang1, Hongchao Ji1,2
1College of Mechanical Engineering, North China University of Science and Technology, Tangshan 063210, China.
Materials (Basel, Switzerland)
|April 9, 2024
概括
研究中等Mn钢显示,碳和含量显著影响热加工能力. 在特定的温度和拉伸率条件下,在7Mn1Al钢中观察到最佳的热加工性能.
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.
- 机械工程 机械工程
背景情况:
- 中等Mn钢对于先进的应用至关重要.
- 了解热变形行为对于优化制造工艺至关重要.
- 碳 (C) 和 (Al) 对热加工能力的影响需要详细研究.
研究的目的:
- 建立中等Mn钢的构成模型和热加工图.
- 分析C和Al含量对热变形行为和加工性能的影响.
- 确定最佳的加工窗口,以提高热加工能力.
主要方法:
- 使用Gleeble-3500热模拟机进行同热热压缩试验.
- 基于摩擦校正理论的应力-应变数据的摩擦校正.
- 开发一个包含Al含量和应变补偿的Arrhenius构成模型.
- 在0.9.的压力下构建热处理图.
主要成果:
- 增加的C含量改变了热变形激活能 (Q) 与真压力的趋势.
- 含量从0到1.14重量%降低了Q,改善了热加工性;较高的含量 (3.30重量%) 增加了Q并阻碍了性能.
- 7Mn1Al钢在975-1125°C和0.2-5s-1之间表现出最佳的热加工性能.
结论:
- 碳和含量对中等Mn钢的热变形激活能量和热可加工性产生重大影响.
- 微观结构的变化,包括碳化物沉和δ-铁形成,决定了热加工性能.
- 特定的C和Al含量范围,以及优化的温度和拉伸率,对于优越的热加工能力是必要的.
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