Shanghai Daoqin Plastics Co., Ltd.

         is add strong/high metal surface hardness strong/high 化, very more for mold production using/adopting process improves,而 mold rear production cracks is hot process most large defect, very has can can make processing good mold waste, that about/regarding mold generate cracks factors has which? its main/primary has large factors.

        1, mold material in heavy carbon material 偏析.

        2, mold in in has machine processing or cold deformation force.

        3, mold hot 处理操 as 不当(add hot or cooling fast, cooling selection 不当, cooling temperature degree low, cooling time long and other).

        4, mold complex, thick thin 不均, belt/tape and 螺纹孔 and other, make hot force and 组织应 force large.

        5, mold add hot temperature degree high generate hot or 烧.

        6, mold rear 回火不 and or 回火保 temperature time 不足.

        7, mold 返修淬火 add hot 时,未经 in 间退火而 again add hot 淬火.

        8, mold hot 处理, abrasion process 不当.

        9, mold hot rear electrical processing 时, hard in in has high tensile force and micro cracks.