论文部分内容阅读
对于一定的结构而言,焊接质量与金属的可焊性,焊接材料的选择和焊接工艺等因素有密切关系,而这些因素又必定在在焊接接头部位的宏观组织与显微组织中反映出来。所以利用金相分析的方法来检查焊接接头的组织(宏观组织与显微组织)与某些焊接缺陷。分析熔焊时,焊接接头的结晶,固态下的转变,组织与性能的关系以及判断缺陷的位置、来源,了解某些破裂的成因,对严格控制焊接接头的质量来说,是颇有意义的。比如就船体钢的焊接而
For a certain structure, the welding quality is closely related to the solderability of the metal, the selection of the welding material and the welding process, and these factors must be reflected in the macrostructure and microstructure of the welded joint. Therefore, the method of metallographic analysis is used to examine the welded joint organization (macrostructure and microstructure) and some welding defects. Analysis of fusion welding, the crystallization of the welded joint, the transition of the solid state, the relationship between the structure and the properties, the location of the defect, the source of the defect, and the cause of some cracks are of great significance for strictly controlling the quality of the welded joint . For example, on the hull steel welding