Prediction of Ac1 temperature in P92 steel weld metal

被引：0

作者：

Wang, Xue ^{[1
]}

Zheng, Jiangpeng ^{[1
]}

Shang, Wei ^{[1
]}

He, Xiu ^{[2
]}

机构：

[1] School of Power and Mechanics, Wuhan University, Wuhan, 430072, China

[2] Atlantic China Welding Consumables, INC, Zigong, 643010, China

来源：

China Welding (English Edition) | 2012年 / 21卷 / 04期

关键词：

Microalloying - Welds - Alloy steel - Steel metallurgy - Metals - Regression analysis;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effects of major alloying elements on the Acl temperature in P92 steel weld metal were evaluated by Thermo-Calc, and a formula relating Ac1 to the content of major alloying elements was developed using multiple regression method. Results show that both C and N reduce Ac1 temperature in weld metal, the effect of N on Ac1 is greater than that of C, but their influence on Ac1 is not so significant when they individually vary in the specified chemical composition ranges. Si, Cr, Mo and W increase the Ac1 temperature, and the descending order of their effects is determined as Si, Mo, W, Cr. Mn and Ni decrease the Ac1 in weld metal, the decreasing effect is especially remarkable when the (Mn + Ni) ≥ 1%. The effect of Co is moderate and is much smaller compared to Ni. The variations of Ac1 for the ranges of micro-alloying elements Nb and V are also evaluated, the effect of V is greater compared to Nb and the effect of Nb could be ignored in the specified chemical composition range. A prediction formula for Ac1 temperature in P92 steel weld metal within the specified chemical composition ranges was developed based on the comprehensive consideration of the calculated Ac1 temperatures and the experimentally measured results. Copyright: ©2012 Editorial Board of CHINA WELDING.

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页码：8 / 14