硬质合金因为具有高硬度、高抗弯强度、强耐磨、抗腐蚀等一一系列优越性能，被人们称之为“工业的牙齿”，从而被广泛应用到石油天然气、煤炭钻采、工程机械、流体控制、船舶装备等具有高挑战性的行业领域。在这些严苛环境中，硬质合金零部件难免会遇到磨损、侵蚀等难题，这就需要材料工程师们想方设法给硬质合金零件做一层保护层，以延长硬质合金零部件的使用寿命，硬质合金涂层即是保护工件延长寿命最有效方法之一。今天西迪小编就给大家聊聊硬质合金涂层有什么作用？为什么要进行硬质合金涂层？
　　硬质合金（包括一系列硬质合金产品在内的，比如硬质合金材料、硬质合金刀片、硬质合金刀具、硬质合金耐磨零部件、硬质合金模具等）在使用的时候，表面复杂的应力作用和高速运转时的热磨损，会使得硬质合金材料（尤其是硬质合金刀片）磨损非常严重，从而导致硬质合金刀片刀刃钝化，使硬质合金材料的寿命大大降低，进而给极大的降低生产效率。在有些特殊行业，有些硬质合金产品往往是硬度高了，却韧性达不到，韧性达到要求了却硬度又不达不到使用要求，耐磨性和使用寿命往往不如人意。那么怎么样才能使硬质合金真正具有高韧性的同时又兼具高硬度呢？
　　为了实现此二者兼备的效果，人们想尽千方百计就怎么提高硬质合金产品的使用寿命而努力，不少材料工程师们的不懈努力与多方、多次的探索并不停地实践试验，经过近半个世纪的反复试验与实践，不断总结、改进工艺，终于找到了如何使硬质合金在既具高硬度的同时又皆具高韧性，从而使其使用寿命得到大幅提高的方法。那便是在硬质合金表面进行涂层处理，在硬质合金表面涂覆具有比硬质合金更高硬度和抗弯强度的特殊材料——稀有贵金属。包括TiN、TiC、Ti（C,民）、TiBN、TiB2、Al2O3、Ti（C，N）（CVD）、TiN（PVD）等等，以此来提高硬质合金表面的硬度和抗弯强度的方法。由于涂层材料具有比硬质合金更高的硬度和耐磨性能，从而能使硬质合金经过涂层处理后使其耐磨寿命成倍提高。
　　硬质合金涂层其实就是将硬质合金表面进行改性，硬质合金物理改性主要是通过涂覆的方法是在硬质合金基体材料表面形成单层或者多层结构，从而赋于硬质合金材料新的性能。
　　硬质合金产品表面经过涂层（改性）处理后的好处就是使硬质合金的表面具有更高的硬度，尤其是硬质合金经过多层涂层或多层复合涂层改性后，更是显著提高了硬质合金的耐磨性和使用寿命，同时又不丧失其心部韧性，显著提高硬质合金的使用性能。
　　硬质合金的涂层处理还有一个更的的优点是可以根据不同用途作针对性的有选择地进行改性，达到想要的最佳性能效果。比如硬质合金刀片经过涂层改性后能显著提高其耐磨损性和耐热性，从而达到提升其使用寿命的目的。西迪技术股份有限公司14年来专业生产系列硬质合金产品，在硬质合金表面改性方面掌握先进技术拥有成套设备，能满足广大客户的表面处理要求。


Hard alloy, due to its high hardness, high bending strength, strong wear resistance, and corrosion resistance and other series of superior properties, is called "the teeth of industry", and is thus widely applied in industries with high challenges such as oil and gas exploration, coal drilling and mining, construction machinery, fluid control, and ship equipment. In these harsh environments, hard alloy components inevitably encounter problems such as wear and erosion, which requires material engineers to find ways to apply a protective layer to hard alloy parts to extend their service life. Hard alloy coatings are one of the most effective methods for protecting workpieces and prolonging their lifespan. Today, the editor of Xidi will talk about the functions of hard alloy coatings and why hard alloy coatings are needed.
When hard alloy (including a series of hard alloy products, such as hard alloy materials, hard alloy blades, hard alloy tools, hard alloy wear-resistant components, hard alloy molds, etc.) is used, the complex stress on the surface and the thermal wear during high-speed operation will cause severe wear of hard alloy materials (especially hard alloy blades), resulting in the dulling of the blade edge and a significant reduction in the lifespan of hard alloy materials, thereby greatly reducing production efficiency. In some special industries, some hard alloy products often have high hardness but fail to meet the required toughness. When the toughness meets the requirements but the hardness does not meet the usage requirements, the wear resistance and service life of hard alloy materials are often unsatisfactory. So how can hard alloy truly have high toughness while also having high hardness?
To achieve this dual effect, people have tried every possible means to improve the service life of hard alloy products. Many material engineers' unremitting efforts and multiple explorations have continuously been practiced and tested. After nearly half a century of repeated experiments and practice, they have continuously summarized and improved the process, finally finding a method to make hard alloy have both high hardness and high toughness, thereby significantly increasing its service life. That is to apply coating treatment to the surface of hard alloy. Coating the surface of hard alloy with special materials with higher hardness and bending strength than hard alloy - rare precious metals such as TiN, TiC, Ti(C,N), TiBN, TiB2, Al2O3, Ti(C,N) (CVD), TiN (PVD), etc. - to improve the hardness and bending strength of the hard alloy surface. Since the coating materials have higher hardness and wear resistance than hard alloy, it can significantly increase the wear life of the hard alloy after coating treatment.
Hard alloy coatings are actually a modification of the surface of hard alloy. The physical modification of hard alloy mainly involves coating the surface of the hard alloy base material to form a single layer or multiple layers of structure, thereby endowing the hard alloy material with new properties.
The benefits of hard alloy surface coating treatment are that the surface of hard alloy has higher hardness, especially after multi-layer coating or multi-layer composite coating modification of hard alloy, the wear resistance and service life of hard alloy are significantly improved, while not losing its core toughness, significantly improving the performance of hard alloy.
The coating treatment of hard alloy has another advantage that it can be modified selectively and specifically for different uses to achieve the desired optimal performance effect. For example, after coating modification of hard alloy blades, their wear resistance and heat resistance can be significantly improved, thereby achieving the purpose of extending their service life. Xidi Technology Co., Ltd. has been professionally producing a series of hard alloy products for 14 years. It has mastered advanced technologies and has complete equipment in hard alloy surface modification, and can meet the surface treatment requirements of a wide range of customers.