Shanghai Daoqin Plastics Co., Ltd.

         resistant use degree for use has 密切 关系, if resistant use degree good,就会导致冲模早期 loss bad can positive use, therefore in use is need which factors effect/influence resistant use degree, this not only can improve/increase use property can, also can long use lifespan.

        六 large factors effect/influence resistant use degree:

        1, structure design combined effect/influence

        冲模 structure is effect/influence resistant use degree key/critical, structure combined easy formed rigid property and thick distribution non-uniform,以 and surface defects (如 surface oxidation, carbon, 裂痕, 疤痕)都会 effect/influence material property can,造 formed 冲模 早期失效.

        2, 冲模材 material selection effect/influence

         selection combined 适 冲模材 material can anti 止冲模早期失效. material make internal generate cracks,引起脆 property fracture, in 进一步 hot and use in,该 cracks 进一步 expand 展而引起冲模 cracking. in hot processing and 退火时, again machine processing rear has still 残留脱 carbon 层, due to inner outer 层组织 different,造 formed hot cooling speed degree 不一致, generate cracks,引起冲模 cracking. has relatively high and alloy 元素, has relatively more 共晶化 combined material,导致淬火时常常出现沿 belt/tape carbon material distribution cracks,冲模 in use process in cracks 进一步 expand 展,造 formed cracking.

        3, machine processing effect/influence

        冲模 type separation or 冲头 圆角部 separation, in machine processing in 常常因进刀太 deep lower 刀痕,造 formed force in,淬火时 versus 应部位 cracks 进一步 expand 展,导致冲模 cracking. electrical processing 时,冲模 by add hot to high temperature degree, make 组织发生变化,即 electrical processing 异常层受 to 交变应 force function, micro cracks formed large cracks,导致冲模 cracking waste. abrasion processing 会导致研削 surface hot, or surface soft 化, hardness reduce, make in use in abrasion loss heavy, or due to hot force generate abrasion cracks, most rear 导致冲模早期失效.

        4, hot specification effect/influence

        冲模 in machine processing rear 都应进行淬火, and other hot 处理. add hot temperature degree high low, time long short, cooling speed degree large small, gas and other process parameters selection 不当都会 effect/influence resistant use degree. mold in has relatively more and relatively more alloy 元素, thermally conductive property 差, add hot speed degree can fast.

        当发生 oxidation 时,冲模 surface easy 划伤, dimensions small, use easy generate fatigue cracks,当造 formed carbon 时, surface hardness significantly reduce,造 formed abrasion loss;淬火 temperature degree high, easy formed long large, make 钢呈现出脆 property,因而冲模 use in 常常出现 cracks, 崩刀, and other 事故, versus 反,淬火 temperature degree low,钢 resistant pressure strong/high degree low,冲头 easy 出现鼓行而失效. for/regarding different 冲模材 material,应 according to requirements 组织形态, selection different cooling speed degree, for/regarding high alloy 钢, due to has relatively more alloy 元素,淬火 property relatively low, can using/adopting cold, cold,甚至 and other temperature 淬火, separation grade and other process. surface strong/high 化处理也 is improve/increase use lifespan very important 途径, nitrogen 化, 渗硼, carbon and and other tool has 一定 效果,当 strong/high process control 不严格 or strong/high methods selection 不当时,就不 can can obtain 预期效果,反而导致冲模 早期失效.

        5, various as conditions

        如锻打 temperature degree, lubricant and lubricated methods, cooling speed degree, 补焊, preheating temperature degree and equipment and other for resistant use degree has very large effect/influence. must control, positive use,才 can 发挥冲模材 material property can obtain relatively high lifespan, its in 补焊时 welding easy cracks, due to 拉, pressure 交变应 force function, cracks expand make use lifespan shrink short.

        6, 冲模工 as temperature degree effect/influence

        冲模 工 as temperature degree can separation is low temperature, normal temperature or temperature degree and other types 状态, temperature degree for wear resistance has versus large effect/influence. usually in 250 degree below/following main/primary is oxidation abrasion loss,即冲模 for parts or and parts between versus for scratch,形 formed oxidation film 并反复形 formed and 剥落, abrasion loss amount relatively small;250 degree to 300 degree between 时转变 is viscous abrasion loss, abrasion loss amount to most large value; high 于300 degree also is oxidation abrasion loss is 主, abrasion loss amount toward decrease small,但 temperature degree high 时,冲模 hardness obvious decline, viscous phenomenon add heavy,甚至形 formed relatively large 面积烧结 and melt abrasion loss.