鉴于压力容器壳体的制造,通常采用锻造或卷板,焊接结构,因此用于制造壳体材料的18MnMoNb 钢,不仅要有优良的机械性能,且应有良好的可焊性。钢的可焊性通常是指适应于获得预期质量要求的焊接接头各个性能的综合,它除与钢的成分、性能有关外,尚与钢材配用的焊接材料(焊条、焊丝、焊剂),采用的焊接条件,工艺方法等密切相关。 In view of the manufacture of pressure vessel shell, usually using forging or coiling, welding structure, so 18MnMoNb steel for the manufacture of shell material, not only have good mechanical properties, and should be good solderability. Steel solderability usually refers to the general quality of the welded joints to meet the expected quality requirements of the integrated, in addition to its composition and properties of steel, but also with the steel with the welding material (electrode, wire, flux), the use of The welding conditions, process methods are closely related.