Shanghai Daoqin Plastics Co., Ltd.

         surface strong/high 化处理 methods very more, main/primary has carbon, nitrogen, 渗硫, 渗硼, nitrogen carbon 共渗, metal and other. using/adopting different surface strong/high 化处理 process, can make mold use lifespan improve/increase 几倍甚至于几十倍,近几 year also 出现 一 surface strong/high process,本文 heavy 四 方面 introduction,供同行参考.

        1.离子渗 nitrogen, is improve/increase mold resistant property, wear resistance, resistant hot fatigue and anti viscous property can, can using/adopting 离子渗 nitrogen. 离子渗 nitrogen advantages is significantly shrink short nitrogen time, can through different gas 体组份 adjustment control 渗层组织, reduce nitrogen surface property, deformation small,渗层 hardness distribution relatively 平稳,不 easy generate and hot fatigue. can 渗 基体材 material ratio gas nitrogen 广,无毒,不会爆炸, production safety,但 for complex mold, difficult obtain uniform add hot and uniform 渗层,且渗层 relatively shallow, relatively 陡, temperature degree and temperature degree uniform property still has solution.

        离子渗 nitrogen temperature degree 以450~520℃ is 宜,经处理6~9h rear,渗 nitrogen deep 约0.2~0.3mm. temperature degree low,渗层太 thin; temperature degree high,则 table/sheet easy hydrophobic 松层, reduce resistant mold sticking can force. 离子渗 nitrogen its thick degree 以0.2~0.3mm is 宜. abrasion loss rear 离子渗 nitrogen mold,经修复 and again 次离子渗 nitrogen rear, can use, from can large large improve/increase mold use lifespan.

        2. nitrogen carbon 共渗, nitrogen carbon process temperature degree relatively low (560~570℃), deformation amount small,经处理 mold surface hardness high 达900~1000HV, wear resistance good, resistant property strong/high, has relatively high high temperature hardness, can used for pressure 铸模, cold 镦模, cold 挤模, hot 挤模, high speed and plastics 模, separation can improve/increase use lifespan 1~9倍. gas nitrogen carbon rear 常发生 deformation,膨胀 amount combined material thick degree 25% left right,不宜 used for precision mold. front 必经 退火 and remove 残余.

        例如:Cr12MoV钢 made sheet/plate elastic 簧孔冲孔凹模,经 gas nitrogen carbon and salt 浴渗钒处理 rear, can make mold lifespan improve/increase 3倍. also 如:60Si2钢 made cold 镦螺钉冲头, using/adopting 预先渗 nitrogen, short carbon nitrogen 共渗, 直接淬油, low temperature and relatively high temperature degree 回火处理 process, can improvement tough property, improve/increase cold 镦冲头 lifespan 2倍 above.

        3. carbon nitrogen ternary 共渗, ternary can in nitrogen in 进行,渗 agent is has machine agent and 氨, its ratio/proportion is 1∶7,共渗 temperature degree is 600℃,共渗 time 4h,共渗层化 combined material thick 3~4μm, expand dispersion deep degree 0.23mm, surface hardness is HV011050. 经共渗处理 rear mold lifespan significantly improve/increase.