一、前言在正常的焊接生产中,普低钢因含铜而导致高温裂缝的现象虽然很少发现,但是,含铜普低钢有时会产生热加工表面网裂,自动埋弧焊因铜导咀的熔化会引起焊道高温裂缝,以及铜本身熔点较低等原因,自然会使人们在含铜钢与焊接高温裂缝之间产生一些不祥之念。高 Preface In the normal welding production, ordinary low-grade steel due to copper caused by the phenomenon of high temperature cracks rarely found, however, the copper-containing low-grade steel sometimes have hot surface cracking, automatic submerged arc welding due to copper Tsui melting will lead to high temperature cracking weld, and copper itself lower melting point and other reasons, will naturally make people between the copper-containing steel and welding cracks between the high temperature some of the ominous. high