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Updated: May 28, 2025

Experimental Procedure for Warm Spinning of Cast Aluminum Components
Published on: February 1, 2017
初始滚动温度对液化天然气微结构演变的影响 耐低温钢条
Zhenghong Ma1,2, Jun Cao1, Zhibo Zhang3
1Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
这项研究研究了冷却速度和滚动温度如何影响液化天然气的低温钢 (HRB500DW). 较高的冷却速度增加了硬度,但可以形成不良的微观结构,1050°C的初始滚动温度是最佳的.
科学领域:
- 金工程 金工程 金工程
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
背景情况:
- 耐低温钢条 (HRB500DW) 对于液化天然气 (LNG) 储至关重要.
- 了解连续冷却过程中的相变化对于优化钢材性能至关重要.
- 滚动温度和冷却速度对微观结构和硬度的影响需要详细研究.
研究的目的:
- 在不同的连续冷却条件下分析 HRB500DW 钢的相变法,微观结构和硬度.
- 为了确定不同接温度和冷却速度对钢的组织变化的影响.
- 确定最佳的加工参数,以提高液化天然气储应用中的材料性能.
主要方法:
- 对经过连续冷却的HRB500DW钢进行实验分析.
- 在不同的冷却速率 (1-40°C/s) 和初始滚动温度 (1000°C与1050°C) 的微结构特征.
- 测量关键相变点 (AC1和AC3) 和硬度变化.
主要成果:
- 关键相变点AC1和AC3被确定为702°C和880°C.
- 微观结构的范围从多边形铁/珍珠石在1-2°C/s到贝尼特 (10-25°C/s) 和马石 (15°C/s).
- 快速冷却 (40°C/s) 形成有害的网状铁,而增加冷却速度通常会提高硬度; 1050°C的初始滚动温度被证明是优越的.
结论:
- 冷却速度显著影响HRB500DW钢的微观结构和硬度.
- 优化冷却速率和初始滚动温度 (例如1050°C) 对于实现液化天然气储所需的性能至关重要.
- 控制式冷却对于避免有害的微观结构 (如网状铁) 和最大限度地提高材料性能至关重要.
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