至今对铸铁的“变质”问题,特别是“变质”给焊接带来困难的主要原因是什么,如何排除这一困难,以往有关资料都谈的不够。以至一听是“变质”铸铁,就感到很难焊,甚至是无法焊。 本文的目的在于解释“变质”的实质,影响“变质”的因素,“变质”后是什么因素阻碍熔敷金属与母材的熔合,如何 To date, the main reasons for the “deterioration” of cast iron, especially the “deterioration” of welding, are how to eliminate this difficulty. In the past, the relevant information was not sufficient. Even if it is a “metamorphic” cast iron, it feels hard to weld or even impossible to weld. The purpose of this paper is to explain the essence of “metamorphism”, the factors that affect the “metamorphism”, what is the factor behind the “metamorphism” that hinders the fusion of the deposited metal and the base metal, and how