铁基粉末冶金零件的电阻焊

Upset welding of iron-based powder metallurgy parts

本文以飞块座部件焊接为例阐述了铁基粉末冶金用凸焊法焊接的可行性,对各焊接规范参数与焊接强度的关系作了全面的分析,对焊接中相关问题作了说明,如预制焊点的制备、焊接结构的选择、被焊材料含碳量的选择、被焊材料的密度、被焊材料的清洁度、焊接工装的设计、焊接精度的保证等,在此基础上肯定了铁基粉末冶金是可以焊接的并能够获得较高的强度和精度。

The feasibility of the upset welding of flying-block as an example of iron-based powder metallurgy parts and the relations between welding standard parameters and welding strength are presented. The issues relative to welding, such as preparation of prefabricated welding dots, selection of welding structures, selection of carbon content of welding material, the density of welding material, cleanliness of material, design of processing equipments, guarantee of welding precision, etc are described. The feasibility of the upset welding of iron-based powder metallurgy parts is validated and higher welding strength and precision are available.