Prediction of the δ to γ transition in austenitic stainless steels during laser treatment
Prediction of the δ to γ transition in austenitic stainless steels during laser treatment
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DOI：
10.2355/isijinternational.38.71
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发表时间：
1998-01-01
影响因子：
1.8
通讯作者：
Kurz, W
中科院分区：
文献类型：
--
作者：
Fukumoto, S;Kurz, W
对奥氏体不锈钢进行了激光重熔试验，研究了成分(Cr/Ni当量在1.5~1.61之间)和凝固速度(V-S=1~30 mm/S)对初生β-铁素体和初生伽马-奥氏体相选择的影响。将实验结果与前人的工作进行了比较。通过与Fe-Cr-Ni三元系微结构转变的比较，可以用Cr/Ni当量来预测从增量到伽马的转变。用多元体系的枝晶生长理论可以模拟三角洲-伽马相变。计算结果表明，该方法在微观结构分析中具有很大的潜力。
Laser remelting experiments have been performed with austenitic stainless steels to evaluate the effects of composition (Cr/Ni-equivalent between 1.52 and 1.61) and solidification velocity (V-s=1 to 30 mm/s) on the phase selection between primary delta-ferrite and primary gamma-austenite. Experimental results were compared with previous work. The Cr/Ni-equivalent is useful to predict the transition from delta to gamma by comparison with microstructural transitions in the Fe-Cr-Ni ternary system. The delta to gamma transitions can be modeled by the dendrite growth theory for multicomponent systems. The calculated results show the potential of this approach for the analysis of microstructure formation.