1. Integral Toughening and Mould Toughening Technology
beplay全站app安卓不仅要具有优异的综合强度性能，而且型腔表面也要有优异的性能，这样才能进步beplay全站app安卓的使用寿命，以达到要求，在beplay全站app安卓上再提出对经纬线的综合强度进行改变，停止外观改善的各种处理过程:对于普通冷加工beplay全站app安卓钢，采用低温淬火和低温回火处理，可获得增强韧性、降低脆性和破碎性的良好效果;对热beplay全站app安卓钢进行高温淬火回火处理，可显著提高热beplay全站app安卓钢的强度、韧性和热稳定性。例如，对3Cr2W8V数据制成的压铸beplay全站app安卓，采用400℃~ 500℃和800℃~ 850℃两种预正火后再停止高温淬火、回火处理，可提高韧性40%，beplay全站app安卓寿命可提高1倍。
Mould not only has excellent comprehensive strength performance, but also has excellent performance on the surface of the cavity. Only in this way can the service life of the die be improved to meet the requirements. It is proposed that the comprehensive strength of longitude and weft should be changed on the die, and all kinds of treatment processes for improving the appearance should be stopped. For common cold-working die steel, low-temperature quenching and low-temperature tempering treatment can be used to enhance the service life of the die. Good effect of toughness, reducing brittleness and crushing; high temperature quenching and tempering treatment of hot die steel can significantly improve the strength, toughness and thermal stability of hot die steel. For example, the toughness of the die-casting die made from 3Cr2W8V data can be increased by 40% and the life of the die can be increased by one time by using two kinds of pre-normalizing: 400 ~500 ~800 ~850 ~before stopping high temperature quenching and tempering treatment.
In addition, the deformation can be heat treated. Deformation heat treatment is a toughening and toughening process that separates the strengthening and phase transformation strengthening phases of steel. The toughening essence of deformation heat treatment is to obtain fine austenite grains, refine martensite, increase the dislocation density of martensite, form cellular substructure and promote carbide diffusion hardening.
2. Mould Appearance Strengthened Heat Treatment
The process of die appearance enhancement mainly includes gas soft nitriding, ion nitriding, EDM appearance enhancement, boronizing, TD, CVD, PVD, optical appearance enhancement, ion implantation, plasma spraying, etc.
(1)气体软氮化:使氮在氮化温度合成后产生活性氮原子，由金属表面吸收入钢内并由外向内扩散，形成氮化层。beplay全站app安卓经硝化处理后，外部硬度可达到HV950 ~ 1200，使beplay全站app安卓具有很高的红色硬度和很高的疲劳强度，并提高了beplay全站app安卓外观的亮度和抗咬伤能力。
(1) Gas soft nitriding: Nitrogen is synthesized at nitriding temperature to produce active nitrogen atoms, which are absorbed into steel by metal surface and diffused from outside to inside to form nitriding layer. After nitrification treatment, the external hardness of the die can reach HV950 ~ 1200, which makes the die have high red hardness and high fatigue strength, and improves the brightness of the die appearance and anti-bite ability.
(2)离子氮化:将待处理的beplay全站app安卓在真空容器,充满一定压力的氮气混合物),如氮或氮、氢,然后处理beplay全站app安卓的阴极,阳极与真空容器盖墙,阳极和400 ~ 600 v直流电压、电极、阴阳开始辉光放电,气体电离的容器,大量的电子和离子的空间。在电场作用下，正离子冲向阴极，高速轰击beplay全站app安卓表面，使beplay全站app安卓升温。高能正离子被带进beplay全站app安卓外，获得电子，变成氮原子被beplay全站app安卓外吸收，并扩散形成渗氮层。离子渗氮可提高beplay全站app安卓的耐磨性和疲劳强度。
(2) Ion nitriding: the mould to be treated is filled with a mixture of nitrogen gas under certain pressure, such as nitrogen or nitrogen and hydrogen, and then the cathode of the mould, the cover wall of the anode and vacuum container, the glow discharge of the anode and 400-600 V DC voltage, the anode and the cathode, the cathode and the cathode and the cathode start, the gas ionization container, and a large number of electrons and ions space. Under the action of electric field, the positive ions rush to the cathode and bombard the surface of the die at high speed, which makes the die warm up. High-energy positive ions are brought into the mold, and electrons are obtained. Nitrogen atoms are absorbed outside the mold and diffused to form nitriding layer. Ion nitriding can improve the wear resistance and fatigue strength of the die.
(3) Appearance enhancement of EDM: This is the process of directly applying high energy density electric energy to stop strengthening the appearance of dies. By means of spark discharge, conductive data are dissolved into the surface of metal workpiece as electrodes, thus forming an alloy surface strengthening layer, thereby improving the physical, chemical and mechanical properties of the working surface. For example, the use of WC, twitch and other cemented carbide electrode materials to strengthen the appearance of high-speed steel or alloy tool steel can form a microscope HV1100 hardness, wear resistance, corrosion resistance and red hardening layer hardness, so that the service life of the die is significantly improved. The advantages of EDM appearance enhancement are simple equipment and easy operation. After treatment, the wear resistance of the die has made remarkable progress. The defects are rough surface, thin thickness of strengthening layer and low efficiency of strengthening treatment.
(4)渗硼:因为红色渗硼层具有良好的硬度、耐磨性,渗硼后可以显著提高beplay全站app安卓的硬度的外观(达到HV1300 ~ 2000)和耐磨性,可以常用beplay全站app安卓外观加强,特别适用于beplay全站app安卓的磨损条件的治疗。但渗硼层的脆性较大，限制了渗硼层的应用。
(4) Boronizing: Because the red boronizing layer has good hardness and wear resistance, the hardness appearance (up to HV1300-2000) and wear resistance of the die can be significantly improved after boronizing, and the appearance of the commonly used die can be strengthened, especially for the treatment of wear conditions of the die. However, the brittleness of boronized layer is large, which limits the application of boronized layer.
5 TD热处理:在空气或耐热钢坩埚盐浴炉,硼砂浓缩到坩埚加热到800℃~ 1200℃,然后到相应的硬质合金粉末的成分(如钛、钒、铌和铬),然后到坩埚钢或硬质合金工件浸渍绝缘,1 ~ 2小时参加元素将传播与碳钢工件外观和攻击反应形成碳化层,所得到的碳化物层具有较高的硬度和耐磨性。
5 TD heat treatment: In air or heat-resistant steel crucible salt bath furnace, borax is concentrated to crucible and heated to 800 ~1200 C, then to the corresponding composition of cemented carbide powder (such as titanium, vanadium, niobium and chromium), and then to crucible steel or cemented carbide workpiece impregnated insulation, 1 to 2 hours to participate in the elements will be propagated and reacted with the appearance and attack of carbon steel workpiece to form a carbide layer, resulting in a carbide layer with high hardness. Degree and wear resistance.
6 CVD(化学气相沉积):死在氢(或其他维护气体)加热到900℃~ 1200℃,为载体,低温气化挥发性金属化合物气体如四氯化钛(TiCI4)和甲苯CH4(或其他碳氢化合物)蒸汽烤箱,由钛和碳氢化合物在TiCI4碳(以及碳钢)的外观beplay全站app安卓外表阻止化学反应,生成一层所需的金属化合物,如碳化钛涂层。
6 CVD (Chemical Vapor Deposition): Dead in hydrogen (or other maintenance gases) and heated to 900 ~1200 C. As carriers, volatile metal compounds such as titanium tetrachloride (TiCI4) and toluene CH4 (or other hydrocarbons) are gasified at low temperatures in steam ovens. Titanium and hydrocarbons prevent chemical reactions on the surface of TiCI4 carbon (and carbon steel) dies to form the required metal compounds, such as titanium carbide coating. Layer.
7 PVD method (physical vapor superposition method): Enhance the evaporation of metal atoms in vacuum chamber, or by bombarding charged particles, under the action of current bias, absorb and accumulate them on the surface of workpiece to form a strengthening layer. Titanium carbide, titanium nitride, alumina and other compounds can be deposited on the workpiece surface by vapor deposition.
The above is the relevant content of Shandong Mold Factory for you, hope to help you, our website is http://www.jnhjgs.cn, welcome to consult.