摘要
Abstract
Aiming at PCrNi3MoVA medium carbon quenched and tempered steel, a kind of Cr-Ni-Mo-V alloy system high-strength steel electrode was developed. By observing the microstructure of weld metal, measuring tensile strength and impact toughness of weld metal, the effect of welding heat input on the properties of high strength steel welding electrode was studied. The results showed that when the welding current is higher than 220 A, the amount of acicular ferrite gradually reduce, the organization grain gradually enlarge and mechanical properties gradually deteriorate with the increase of welding current. To comprehensively consider the effect of heat input on the weld metal performance, the welding current about 220 A is more appropriate.关键词
焊接/高强钢焊条/焊接热输入/PCrNi3MoVA/Cr-Ni-Mo-V合金系Key words
welding/high strength steel welding electrode/heat input/PCrNi3MoVA/Cr-Ni-Mo-V alloy system分类
矿业与冶金
