Shanghai Daoqin Plastics Co., Ltd.

         mold material for mold lifespan effect/influence is mold material types type, chemical formed separation, structure, hardness and quality and other factors comprehensive 反映, its in material types type and hardness effect/influence most is obvious.

         mold material types type for mold lifespan effect/influence is very large. for types parts, use different mold material as bending experiment/testing, use 9mn2v材 material, its lifespan is 5万次; use cr12mov渗 nitrogen, its lifespan can 达40万次. therefore, in selection mold material 时, according to made parts amount large small, combined selection mold material.

         mold as parts hardness for mold lifespan effect/influence very large, 但并不 is hardness high, mold lifespan long. using/adopting t10钢 manufacturing silicon sheet/slice 冲模, hardness is 52—56hrc, 冲几千次, parts 毛刺就 very large. if will hardness improve/increase to 60-64hrc, abrasion lifespan can 达2—3万次. if improve/increase hardness, 则会出现早期 fracture. has hardness high, using/adopting cr12mov钢 manufacturing 六角螺母 cold 镦凸模, hardness is 56—60hrc时, generally lifespan is 2~3万 parts, 失效形式 is 崩裂;如 will hardness drop to 50—54hrc, lifespan can improve/increase to 6~8万 parts. can 见, mold hardness must according to formed property and 失效形式而定, make hardness, strong/high degree, tough property, wear resistance, fatigue resistance and other to formed need most combined.

        材 material quality for mold lifespan effect/influence 也不容 overlook, especially is high carbon high alloy 钢, defect relatively more, is mold cracking and mold 早期破 bad 根源. therefore, improve/increase material quality is improve/increase mold lifespan important 方面.

         using/adopting new hot process, 挖掘现 has material force, for improve/increase mold lifespan is has 效, 不 也 is has 限. especially is processing process development 越 越趋 toward high temperature, high pressure, high speed, mold conditions more add 苛刻, therefore need large degree improve/increase mold lifespan, must made and application new mold material.

        针 for mold as conditions and already has material 不足, in recent years, already made multiple new mold material, its in alloy is 主, 如hmi, hm3, rm2, 012a1, cg2, 65nb, lm1, lm2, ld, ch-1, 8cr2s and other. new made hard alloy (dt), alloy iron (smri-86), high temperature alloy (如tzm) and other relatively good application 效果, use hm3 made 锻模, ratio use 3cr2w8v钢 made mold lifespan improve/increase l倍; use ch-1钢 made in thick sheet/plate lifespan ratio use t10a钢 made improve/increase 3-5倍; use 012a1 made hot pressure ratio use 3cr2w8v钢 made lifespan improve/increase 3~5倍 and other.