In oder to conduct gas carburization of prestressed work-clip(here after referred to as clip)adopt YF rare earth accelerant from Harbi yifeng rare eatrh material co. ,Ltd.and patented technology of Harbin Industry University(rare eatrh low-temperafure gas carburization process). This process improved the heat treatment quality of clip,shortened heat treatment cycle,reduced cost of heat treatment. Metallographical examination,hardness measurement and the rupture fest for single-hole steel stranded wire proved t...

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