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钼及铬钼耐热钢焊条的选用按化学成分和显微组织,耐热钢可分为珠光体耐热钢、马氏体耐热钢、铁素体耐热钢和奥氏体耐热钢。这里主要介绍珠光体耐热钢和马氏体耐热钢的焊条选用。选用的原则是应保证焊缝的化学成分和机械性能与母材基本一致。珠光体耐热钢中含有一定量的碳和合金成分,焊接时有一定的淬硬倾向,在较大拘束应
Molybdenum and molybdenum-molybdenum heat-resistant steel electrode selection by chemical composition and microstructure, heat-resistant steel can be divided into pearlite heat-resistant steel, martensitic heat-resistant steel, ferritic heat-resistant steel and austenitic heat-resistant steel . Here mainly introduces pearlite heat-resistant steel and martensitic heat-resistant steel electrode selection. The principle of selection should be to ensure that the chemical composition and mechanical properties of the weld base metal is basically the same. Pearlite heat-resistant steel contains a certain amount of carbon and alloy composition, welding tend to have a certain degree of hardening in the larger restraint