Eliminate stress: Optimize the coating function of elaborate design

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  • source:BERO CNC Machining
How does Shanteweikekeleman make a low stress coating that can use any leftover stress in exploration all the time, be beneficial to function of overall razor blade thereby. The result of this research is: Introduced several kinds of new bit names. The action that we basically view stress to reach its to rise in the place in bit function here. The main function of cutting tool coating is through raising cutting speed or feed rate improve manufacturing efficiency. Introduce any new bit coat, its prompt a factor is to produce the likelihood of bit breakdown certainly reason, make a coating property that can handle these issues clearly. The coating of a kind of elaborate design, each respect has different function; It is the union of coating craft and coating material, in order to prevent bit occurrence breakdown, make bit develop better performance. Coating already made material of contemporary cutting cutting tool cannot intersected part, the great majority bit that offers nowadays uses all sorts of coating technologies. Multilayer coating piles up by several scumble layer and become, each between with intermediate layer space. Use multilayer coating, people can work according to specific treatment, change the character between each coating, still can ensure coating and harmony of cutting tool base work, getting increasingly accordingly the welcome of people. Use multilayer coating, bit but the benefit union at each attribute, optimize metallic purify rate thereby. Through adding several coating, tool maker can close according to specific data or applied field, make a bit that has specific property, also can make a bit that has extensive property, use at answering all sorts of material or applied circumstance. Now, of people general Shanteweikekeleman multilayer on the GC4240 that coating uses at go up for the GC4225 of turning and offerring grinding. On the GC3205 that still is used at offerring turning, GC3210, GC3215 and GC3220. They use azotic carbonization titanium (TiCN) , 3 oxidation 2 aluminium (Al2O3) change titanium with nitrogen (TiN) , plus a variety of intermediate thin coating. Generally speaking, the data that in using an occasion, of all kinds cutting tool uses should support inside and outside two kinds of stress. With respect to bit character, stress is the stress of susceptive of one part place that regards cutting as cutting tool in exercise outside. The workmanship of bit also can introduce internal stress, advocate if tensile stress is mixed,reduce stress. Below coating temperature, coating and base are avoided suffer stress. The coefficient of expansion of coating is bigger, accordingly, when refrigeration, the contractive meeting of coating is more than base. Can cause tensile stress to the surface so, and to base generation reduces stress. These exterior stress can form exterior crackle, diffuse downward further. Through reducing tensile stress, can reduce this kind of craze greatly " the tendency " , bit also can bear more undeserved use circumstances. Accordingly, from functional angle character, eliminating tensile stress as far as possible is very important, because tensile stress is,cause the main factor that crackle diffuses. Reduce stress often relatively advantageous, can help stem crackle diffuse. Mutual attribute is inevitable the ground, cutting tool base and coating have similar property. Both asks to have very tall hardness, rupture tenacity and wear-resisting intensity. Multilayer coating still conduces to bring into other to cause coating and base to break match and the parameter that causes stress. For example, the interfacial heat between coating of decision of hot coefficient of expansion and base is broken match stress. The union of wear-resisting coating and cutting tool surface is a crucial requirement, because,this is, unless coating and cutting tool are very good,be united in wedlock, otherwise, coating produces effect impossibly. In the besmear Fu craft of chemical coating, achieve good union more easily relatively, the method is form between coating and base cause diffusing interface. In the positive result that obtains in Shanteweikekeleman, in plating of lukewarm chemical evaporate (MT-CVD) craft and later period of new stress bring down handle craft to occupy very big one part. MT-CVD craft is used at azotic carbonization titanium or oxidation titanium coating. Its tensile stress is worth often inferior, suit to will rupture more intensity of tenacity, wear-resisting, chemical wearability and heat-resisting crack the character such as the gender to be united in wedlock together. Can improve the performance of bit so. The consideration craft on craft decided the structure of bit, and the attribute that bit structure decided bit again. Then, those who formed coating crystal is columnar direction and ideal particle size. Crystal shows fore-and-aft way, the appearance is better, it is place of centralized happening tatty. In addition, the degressive stress line between crystal goes to mechanical stress dissipation in base material. The key between material atom grows to be shortened, this also conduces to eliminate tensile stress. If be mixed as a result of high temperature,cause small crack, penetrable surface coating, so, these are small crack the stress line between meeting edge crystal to be down dissipation. When the rest stress reachs base, can be absorbed, and won't diffuse bigger break. Such, bit has tenacity and strength. Titanium of MT-CVD nitrogen carbonization and 3 oxidation 2 aluminium (Al2O3) wait for oxide coat tie to use. This coating is coating of alumina of photograph of a kind of granule, columnar, α . This is a kind of very hard data, provide protective screen of a kind of temperature, can protect cutting tool inside body is avoided suffer additional high temperature. The aftertreatment technology that Shanteweikekeleman develops is the final phase of bit production technology. It forms coating of low stress razor blade and slick coating surface. It still passes the cooling cranny near close coating surface, will fold as far as possible cooling break. CNC Milling CNC Machining