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What are the methods of strengthening the surface of injection molds?
Release time:2024-04-12
What are the methods of strengthening the surface of injection molds?
Surface strengthening treatment methods are many, mainly carburizing, nitriding, sulfurizing, boron, nitrogen and carbon copolymerization, metal penetration, etc.. The use of different surface strengthening treatment process, can make the mold service life increased by several times or even dozens of times, in recent years and the emergence of a number of surface strengthening process, plastic mold manufacturer editors to share the injection mold surface strengthening treatment methods, for your reference.
1. Ion nitriding
In order to improve the corrosion resistance of the mold, wear resistance, thermal fatigue and anti-adhesion properties, ion nitriding can be used. Ion nitriding has the outstanding advantage of significantly shortening the nitriding time, can be adjusted through different gas composition control layer organization, reducing the nitriding layer of surface brittleness, deformation is small, the hardness of the layer distribution curve is smooth, not easy to produce spalling and thermal fatigue. Can penetrate the substrate material than the gas nitriding wide, non-toxic, will not explode, production safety, but the shape of complex molds, it is difficult to obtain uniform heating and uniformity of the penetration layer, and penetration layer is shallow, the transition layer is steeper, temperature measurement and temperature uniformity is still to be resolved.
Ion nitriding temperature of 450 ~ 520 ℃ is appropriate, after 6 ~ 9h, nitriding layer depth of about 0.2 ~ 0.3mm. temperature is too low, seepage layer is too thin; temperature is too high, the surface layer is prone to loose layer, reducing the ability to reduce the anti-sticking mold. Ion nitriding layer thickness of 0.2~0.3mm is appropriate, after wear and tear of ion nitriding mold, after repair and ion nitriding again, can be put into use, which can greatly improve the total service life of the mold.
2. Nitrogen-carbon co-infiltration
Nitrogen-carbon co-infiltration process temperature is low (560 ~ 570 * ℃), deformation is small, the surface hardness of the mold steel treated up to 900 ~ 1000HV, good wear resistance, corrosion resistance, high temperature hardness, can be used for die-casting molds, cold upsetting molds, cold extrusion molds, hot extrusion molds, high-speed forging molds and plastic molds, respectively, can improve the service life of 1 ~ 9 times. However, gas nitriding and carbonitriding often occur after deformation, expansion accounted for about 25% of the thickness of the compound, should not be used for precision molds. Before treatment must go through the annealing and elimination of residues.
For example: Cr12MOV steel plate spring hole punching concave mold, gas nitrogen-carbon co-infiltration and salt bath vanadium infiltration treatment, the mold life can be increased by 3 times. Another example: 60Si2 steel refrigeration upsetting screw punch, the use of pre-nitriding, nitrogen, nitrogen infiltration, direct quenching oil, low-temperature quenching and tempering process at higher temperatures, can improve the toughness of the heart to improve the life of the cold upsetting punch more than 2 times.
3. Carbon, nitrogen and boron ternary co-infiltration
Ternary co-infiltration can be carried out in nitriding furnace, infiltration agent for boron organic infiltration agent and ammonia, the ratio of 1:7, co-infiltration temperature of 600 ℃, co-infiltration time 4h, co-infiltration layer compound layer thickness of 3 ~ 4um, the depth of diffusion layer of 0.23mm, the surface hardness of the HV011050. the co-infiltration treatment of the mold after the life of a significant increase.
Ideal Vowin Group is an injection mould & CNC machining factory, support rapid prototyping, 3D printing, mould customization, we have recently helped our customers to complete many big projects, for more details, please visit our official website: www.idmould.com / www.vowin.cn.
If you have relevant needs,please contact us!
Ideal Vowin Group is an injection mould & CNC machining factory, support rapid prototyping, 3D printing, mould customization, we have recently helped our customers to complete many big projects, for more details, please visit our official website: www.idmould.com / www.vowin.cn.
If you have relevant needs,please contact us!
WhatsApp: +8617369230494
Wechat: 17369230494
E-mail: yuki@idmould.com/yuki@vowin.cn
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