Coupling将不同机构中的主动轴和从动轴牢固地联接起来，在使用中我们会发现联轴器都会有发黑处理，那么这样做是为什么呢?下文Drum gear coupling厂家来简单的说说。
1、发黑处理既能满足联轴器的外观、防锈要求，而且成本低，生产效率高;且发黑工艺能降低淬火应力，使联轴器在受力工况下机械性能;
2、对紧固件表面起防锈作用;
3、降低淬火过程的应力作用;
4、增加紧固件表面的光泽作用提升美观程度。
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