The new material that processes in the light of high speed pledges grade is designed

Treatment trend pursues industry of treatment of metal of cutting of high speed of razor blade of 1 hard alloy grows through fast technology and be gifted characteristic. This is by the market competition of such as globalization, aggravate, power that permits taller cutting rate the result of the element action such as the makes in order to and environmental problem grow increasingly awareness of material of bigger stabler machine tool, difficult treatment. Its are as a result, the final user of cutting tool raises the requirement that improves continuously to tool manufacturer with respect to performance of cutting tool property. The general trend of metallic treatment industry is to develop more sexual price to compare good treatment technology. New legal code will raise the use cost of cooling lubricating fluid. This promotes dry treatment (the use of graph 1) . Next, this will increase to more the demand that heat-resisting coating hard alloy mixes forces a metal to machine course of study to consider to replace a method newly. Be in especially auto industry, about reducing the market of specific power consumption demand will emphasize the importance that material chooses. For example, preferential choose light alloy. Outside eliminating light alloy of aluminium and other, the steel products with the high intensity that designs technically can be used morely in the future. Undermentioned the trend with go up the most fundamental for the market: In the light of the taller cutting rate that raises productivity. Undertake to drop the consideration of cost and environmental respect working machining mixing / or minimum is lubricant (MQL) . Difficult treatment material, for example for the spare parts lighter high strenth material. All these trends are qualitative to material of identical cutting tool the wearability of grade, fight plasticity to be out of shape He Ren sex raises more requirement. If tenacity is only question, PVD (deposit of physical gas phase) coating can be regarded a kind to choose. Cannot be the same as deposit of contemporary CVD(chemical gas phase in coating of the PVD on wearability however) coating competes. Ply of PVD coating deposit is less than 5 µm normally, and CVD coating may have 20µm thick. The tradition designs razor blade of cutting of hard alloy of a kind of agglomeration is one kind is aimed at the matrix with custom-built domain of some kind of specific application and coating to optimize combination, rate qualitative order and degree of a kind of material normally. Designing a kind of new material qualitative grade is to should find matrix and coating physics performance optimal combination. The mainest character is hardness and tenacity, however they are mixed conversely material function is mutual and associated. Result, be when cutting tool research and development between wearability and tenacity is inevitable normally eclectically. In the article we will handle a few new approaches to overcome this kind of awkward situation, for example the union of wearability and tenacity. The research and development of the wear-resisting material qualitative grade that will discuss a kind of plan to be used at high speed cutting. With WC-Co base the function that is matrix can pass Co content, WC the change of photograph amount comes grain size and cubic carbide control. Applying functional gradient also is feasible: Endure the matrix below coating closely to found contain a lot ofCo and at the same time extinct the surface layer of hard cubic carbide. With this kind of method, can acquire hard matrix core and do not sacrifice the tenacity of cutting blade. Wear-resisting application circumstance uses the hard matrix that asks to defy plasticity metabolic matrix and tradition normally. Still do not have the matrix that applies functional gradient to distributing normally. Drawback is tenacity is reduced in material of a lot of difficult treatment. In traditional coat, different coating material wears away according to what accept generally the model is derivative multilayer the structure will combine and be optimized. In-house (among) coating is to be based on face of the knife after assuring to be fought goodly to wear away normally the TiC-Ti(C with the adhesion between good coating and hard alloy matrix, n)-TiN combination. The most commonly used intermediate layer is Ti(C, n) and it is almost special today lukewarm chemical gas phase is deposit in using (MTCVD) has deposit. Al2O3 applies inter layer traditionally above have effect of depression tatty of crescent moon of face of the knife before reducing and still use as heat barrier. Finally, normally deposit is in a thin TiN the end face of compound coating for it is cutting tool gets golden color conduces to be aware of easily wear away. Today most coating is on the market by Ti(C, n) , Al2O3 and TiN combination are formed. One layer TiN is enclothed only above Al2O3 normally. Express 1: Stability and brilliant of tripartite of system of crystal lattice of A-Al2O3 K-Al2O3 G-Al2O3 of character of photograph of not stable CVD Al2O3 fasten inclined Fang Jing to fasten cubic brilliant is parameter of crystal lattice of dimensional group R3c Pna21 Fd3m (dust) A=4.

7587c=12.

9929 A=4.

8351b=8.

3109c=8.

9363 A=7.

Does 18 24 32 Al- of atomicity of unit O of 12 16 63/3 of atomicity of 92 unit Al match arrange octahedron 75% octahedron 25% tetrahedral? ? Oxide predicament Al2O3 is put in body of a lot of the not stable abnormity that be the same as element, such as G, H, D, Q, C and K, the A-Al2O3 photograph of adscititious stability. All these changes are back-to-back A-Al2O3 postures that will change stability, it is for example in the heat treatment after deposit process is medium heat treatment, deposit and metallic cutting process. A-Al2O3 of photograph of 3 kinds of Al2O3, K-Al2O3 and G-Al2O3 can be planted with some controlled means by CVD deposit. Watch 1 gave out the character of these photographs. Using the CVD photograph with industrial only measure is A-Al2O3 and K-Al2O3. G-Al2O3 has not served as reduce wear away or attrition coating is commercialized to use, although it most be obtained normally by PVD Al2O3 photograph. Amazedly, stable A-Al2O3 already was discovered to be the same as photograph of not stable K-Al2O3 to compare is the most difficult CVD is deposit in industrial application. This is why the about 80% makes by K-Al2O3 argument in coating of all CVD alumina. But K-Al2O3 is a kind of flabby phasing, still have in deposit process in metallic cutting process (fall in high speed especially) the A-Al2O3 posture that is changed possibly into stability. What the bulk systole that comes up against in changing will be reduced and destroy K-Al2O3 layer finally is adhesion. Is a lot of business on the market use A-Al2O3 coating to be in deposit process K? The outcome that A photograph changes. Accordingly, this kind of coating shows a hot crack and it is brittle (graph 2a) . It is discovery of the closest talent merely the chemistry of nucleus surface is controlled possibly completely and make through adjusting A-Al2O3 photograph nucleate. The coating of generation is comprised by fine grained A-Al2O3, avoided to change crackle (graph 2b) . Result, the result that graph 3b shows and in the past the tenacity with the A-Al2O3 that the technology gets and current K-Al2O3 layer more exceedingly good than showing phase. A) in the past the contemporary A-Al2O3 micromechanism that the micromechanism B) of technical A-Al2O3 has control nucleate and fine grained measure pursues 2 classical wear away the model still has traditional coat to design is to have interrogative. Citing is told, the chemical stability of ascribe Al2O3 arrives high the crescent moon of the melting point Al2O3 of rolled steel wears away depression may be a controlled controlled diffuses least of all process. The crescent moon of Al2O3 wears away depression is plasticity metabolic result more actually. Accordingly, in a lot of steel the Ti(C when treatment, n) is shown have than Al2O3 more exceedingly good fight crescent moon to wear away depression ability, and can predicting side of shown the knife after fighting wears away always is excel Al2O3. From this, need discusses new coating design according to the example below. Graph the coating of 3 two kinds of experiments that stated total on same matrix ply is equal, an Al2O3 that considers according to traditional method is deposit to Ti(C, of N) layer above (graph 3a) and in two Ti(C, deposit Al2O3(pursues between N) layer 3b) . The Ti(C in retrospective example, the heat barrier that face of the knife after N) layer protects Al2O3 layer to avoid crescent moon to be mixed depression wears away and allows to use Al2O3 completely is characteristic. If the graph is shown 4 times, this kind of new design (graph 4b) is more conspicuous than traditional way. Face of the knife after be being fought especially wears away ability rises and be out of shape than fighting with traditional coat design ability increases. The coating life that gets according to new design exceeds traditional coat about 100% . Does graph 3a) traditional coat design: ? Beautiful jade of ⑵ of ┥ of  of Chi of wholesale  phosphor shows rotten Zuo I(C, above N) layer B) one thick layer Ti(C, n) deposit is above alumina pursue with reducing plasticity to be out of shape the tradition of cutting function A) that 4 graphs show hypothesis coating 3 times designs B) basis new blueprint 5.

Those who have what accurate function gradient distributings to strengthen matrix of structural pilot hard alloy to allow application to maintain tenacity is thicker, more the ply of coating of CVD coating CVD of wear-resisting is 20 µm about. Structure of coating of new coat concept is shown 5 times like the graph. Layer of fine grained Al2O3 is placed in two MTCVD Ti(C, between N) . The markeddest characteristic is one thick layer Ti(C, n) besmear is above Al2O3 layer. Since such one layer TiN apply at Ti(C, wear away with be aware of above N) coating. The total ply of coating is 20µm about and the functional gradient that has a design to be used at high speed cutting distributings matrix. If the graph is shown 5 times, back-to-back the rich cobaltic area below coating is quite thick, but and can be aware photograph of tatty dimension size compares its ply can be ignorred. Become and plasticity is fought to be out of shape ability won't drop when very hard matrix is combined together. A few scenes that had completed test idea of test and verify test and verify the test result of the lab. The traditional coat that these experimental concentration pledge at using new material grade design is the same as the market to go up is made quite. 3 are lifted to have representative case below. 3 kinds of the rolled steel that they included 3 kinds to differ, different treatment (have refrigeration one kind among them, two kinds do treatment) . These example show the product phase that designs with traditional coat compared wearability to rise clearly. Exemple of concerned axis of the first 1 example outside rough machining of round dry type. Workpiece material is the 16MnCr5 of hardness HB180. Cutting operating mode is: Fn = 0 of feed of cutting speed Vc = 430 M/min.

Ap = 1 of deepness of 3 Mm/r cutting.

B of traditional coat of A of coating of tradition of 5 Mm new design pursues 6.

Optical micrography makes clear in turning 6.

The material that the cutting blade that new design razor blade is based on after 5 minutes wears away to coating is designed and have similar matrix with tradition of two kinds of main competitors is qualitative of grade contrast compare a concerned axis of the 2nd 2 example outside rough machining of round dry type. Workpiece material is the 42CrMo4 of hardness HB240. Cutting operating mode is: Fn = 0 of feed of cutting speed Vc = 385 M/min.

B of traditional coat of A of coating of tradition of new design of Ap = 2 Mm of deepness of 4 Mm/r cutting pursues 7.

The ability that optical micrography demonstrates to in turning the cutting blade that new design razor blade is based on after 3 minutes wears away to coating is designed and have similar matrix with tradition of two kinds of main competitors is qualitative of grade contrast quite. Exemple the turning that the 3rd 3 example concern external diameter of small bearing annulus and end panel. This experiment adds cooling fluid. Workpiece material is the 100Cr6 of HB=190. Cutting operating mode is: Fn = 0 of feed of cutting speed Vc = 480 M/min.

23-0.

Ap = 1 of deepness of 73 Mm/r cutting.

Blueprint of tradition of 0 Mm new design 8.

Optical micrography shows the cutting blade that is based on new design razor blade wears away and the is based on traditional coat design competitor talent of optimal expression pledges grade pursues 9.

Expect cutting tool what chart expressed to be based on new design product with be being machined what spare parts amount measures life and hind knife face wears away the is based on traditional coat design competitor talent that is the same as optimal expression is qualitative the contrast of grade CNC Milling