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首页> 外文会议>International conference on trends in welding research >Understanding the Role of Initial Microstructure on Intercritically Reheated Heat- Affected Zone Microstructures and Properties of Microalloyed Steels
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Understanding the Role of Initial Microstructure on Intercritically Reheated Heat- Affected Zone Microstructures and Properties of Microalloyed Steels

机译：了解初始微观结构对临界再加热热影响区组织和微合金钢性能的作用

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During steel making, alloying additions and thermo-mechanical processing conditions are optimized to arrive at microstructures that show a good combination of strength and toughness. Additions of alloying elements like Si, Mn, Ni and Cr modify the austenite to ferrite phase transformation kinetics [1-4] while microalloying additions of Ti, Nb, V, Mo, [5-8] control the austenite recrystallization and growth kinetics during rolling. Furthermore, addition of Cu for precipitation strengthening of steels is also common [9,10]. Over the years, controlled rolling of steels has evolved to utilize the effects of these alloying additions for the development of steels with desirable properties [11,12,13]. For in-service applications of these steels, welding becomes a necessary final fabrication step. However, weld thermal cycles will alter the carefully engineered microstructures of these steels and lower their strength and toughness in the weld heat-affected-zone (HAZ).
机译：在炼钢过程中，对合金添加量和热机械加工条件进行了优化，以实现显示出强度和韧性良好结合的微观结构。添加诸如Si，Mn，Ni和Cr等合金元素可改变奥氏体至铁素体的相变动力学[1-4]，同时通过微合金化添加Ti，Nb，V，Mo，[5-8]来控制奥氏体的再结晶和生长动力学。滚动。此外，添加Cu来强化钢的析出物也是常见的[9,10]。多年来，钢的可控轧制已得到发展，以利用这些合金添加剂的作用来开发具有理想性能的钢[11,12,13]。对于这些钢的在役应用，焊接成为必不可少的最终制造步骤。但是，焊接热循环会改变这些钢的精心设计的显微组织，并降低其在焊接热影响区（HAZ）中的强度和韧性。

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