论文部分内容阅读
1.前言在电工技术上,几乎没有一个零件所承受的负荷如一个电气触点那么大,那么错综复杂,因此就对触点材料提出了许多要求,最重要的要求是: (1)导电性和导热性要好 (2)不易烧损(电气磨损)熔 (3)在电路开断过程中“粘连焊倾向”小 (4)耐腐蚀性强 (5)须有足够的机械磨损。通常只有贵重金属才能达到这些要求,有时使用黄金、白金、钯及这些材料的一些合金。 2.存在问题由于经济上和技术上的原因,电气开关中
1. Introduction In electrotechnical engineering, there is almost no load on a part that is as large as an electrical contact, so complicated that many requirements are placed on the contact material. The most important requirements are: (1) electrical conductivity and Good thermal conductivity (2) not easy to burn (electrical wear) melt (3) in the circuit breaking process “sticky welding tendency” small (4) strong corrosion resistance (5) have sufficient mechanical wear. Often only precious metals meet these requirements, sometimes with gold, platinum, palladium, and some alloys of these materials. 2 problems exist for economic and technical reasons, the electrical switch