原位观察稀土镧对低合金高强度钢焊接热影响区晶粒细化的影响

周峰, 曹羽鑫, 万响亮

In-situ Observation of Effect of La on Grain Refinement in Simulated Coarse-grain Heat-affected Zone of High Strength Low Alloy Steel

ZHOU Feng, CAO Yuxin, WAN Xiangliang

表1 不含镧(#1)和含镧(#2)钢中各元素的含量

Table 1 Chemical composition of steels with (#2) and without (#1) La treatment (mass fraction， %)

Samples C Mn Al Si Ti La O N #1 0.05 1.61 0.032 0.25 0.021 0 0.0018 0.0029 #2 0.05 1.58 0.038 0.24 0.023 0.016 0.0013 0.0024