The application of material of cutting tool of new-style pottery and porcelain

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85GPa, interpose is mixed at general pottery and porcelain between YT30, concussion toughness is equivalent to Y130, hear resistance can amount to 1300 ℃ ～ 1400 ℃ , have fight oxidisability goodly. In addition, si pottery and porcelain has self-lubricating function, coefficient of friction is lesser, fight stick receive ability strong, not easy generation accumulates bits tumour, and cutting blade can be ground tartly. Can machine a good exterior quality, special agree with turning is easy the workpiece material that forms the tumour that accumulate bits, if cast silicon aluminium alloy,wait. Cutting tool of compound Si3N4 pottery and porcelain is united in wedlock with covalent bond as a result of Si3N4 pottery and porcelain, grain is long columnar, because this has,taller hardness, intensity is mixed rupture tenacity, at the same time it has lesser hot coefficient of expansion () of ℃ of =3 × 10-6/ , it is better to have so fight machinery to pound gender and heatproof concussion sex. Si3N4 cutting tool is special agree with cutting of the thick finish machining of alloy of cast-iron, high temperature, high speed and heavy cut, its cutting durability comes higher than hard alloy cutting tool severalfold ten times. In car engine the application in the treatment such as cast-iron cylinder body is more and more general. But the hardness of Si3N4 pottery and porcelain is not particularly tall (HRA92.

5) , when processing the work with more expensive hardness, be like cold hard cast-iron (HS65-80) , Gao Ge is cast-iron (HS80-90) , the durability of cutting tool of pure Si3N4 pottery and porcelain is inferior. To improve its wearability. The TiCN that add a person, TiCN+TiN regards horniness as dispersion photograph, in order to raise the hardness of cutting tool material, the intensity with higher at the same time reservation and rupture tenacity, call compound nitrogen to turn cutting tool of silicon pottery and porcelain. Compare with photograph of cutting tool of odd S3N4 pottery and porcelain, compound nitrogen turns cutting tool of silicon pottery and porcelain fight oxidation ability, chemical stability, fought creep ability and wearability to have very big rise, and be made easily and agglomeration. Will be henceforth the key of cutting tool of pottery and porcelain develops way. Cutting tool of Sialon pottery and porcelain makes multilateral home develop a kind of new-style Si eagerly at present base cutting tool of pottery and porcelain: Contest grand (Sialon) cutting tool. The cutting tool that surpass grand is cutting tool of a development of British LucasAyMon company is successful kind of single-phase pottery and porcelain, it is wear-resisting photograph for horniness photograph Al203 with Si3N4, add a few aiding to burn agent Y203, become via hot pressing agglomeration, have very high intensity and tenacity (bending strength can amount to 1200MPa, hardness amounts to 1800HV) , cutting tool of Sialon pottery and porcelain has good heatproof concussion performance, compare with Si3N4 photograph. Of cutting tool of Sialon pottery and porcelain fight oxidation ability, chemical stability, fight creep ability and wear-resisting function taller. Heat-resisting temperature relatively be as high as 1300 ℃ above, it is better to have fight plasticity to be out of shape ability. Its impact strength is close to Yu Tu layer hard alloy cutting tool, si uses the treatment of the difficult treatment material such as Yu Zhu iron and high temperature alloy successfully. Grand is surpassed on international at present (the research of material of Sialon) pottery and porcelain is very active, improving preparation technology, have the positive result with exceeded the fine grained, development respect Si that waits from material of the cutting tool that add pliable but strong to obtain answer photograph, better. With Si3N4 likeness, sialon pottery and porcelain also has structure of 2 kinds of crystal, a-Sialon has taller hardness and wear-resisting property to wait for axial brilliant, b-Sialon is columnar brilliant ruptures tenacity and heat conduct ability opposite better, (Cutting tool of pottery and porcelain of A+b)-Sialon answer photograph is integrated two-phase advantage, cutting performance is more superior, excel of its wear-resisting function is single-phase below burden condition cutting tool of pottery and porcelain has 2 kinds of preparation to add pliable but strong oneself at present the method of A-Sialon pottery and porcelain: ① passes the thermodynamic characteristic that controls nucleate process, former inside agglomeration body grow columnar - Sialon grain adds pottery and porcelain of Sialon of pliable but strong oneself with getting; ② uses combustion to synthesize craft, preparation is single-phase and columnar - Sialon pink body, the preparation in adding this pink system raw material according to proper scale adds pliable but strong oneself - Sialon pottery and porcelain. To drop firing temperature, want to join all sorts of agglomeration auxiliary commonly. More commonly used agglomeration auxiliary has: The oxide such as Y2O3 and a variety of rare-earth element, use 2 kinds at the same time commonly or the agglomeration auxiliary of 2 kinds of above. Cutting tool of Sialon pottery and porcelain applies to high speed cutting, puissant cutting, interrupted cutting; Agree with not only dry cutting, also agree with wet the treatment that cutting Sialon pottery and porcelain can use successfully at alloy of cast-iron, nickel radical, titanium radical alloy and silicon aluminium alloy, it is high speed treatment is cast-iron and the material of ideal cutting tool of nickel radical alloy. Because the chemical endophilicity of it and steel is big, cutting tool of Sialon pottery and porcelain does not suit to process steel. Si3N4 brilliant must add brilliant of cutting tool of pottery and porcelain of pliable but strong to must add pottery and porcelain of pliable but strong is the carbide any crystalline substance that adds certain amount in Si3N4 matrix need and become, can raise cutting tool of pottery and porcelain thereby rupture tenacity. The SW21 brand of the FD03 razor blade that like our country Beijing limited company of square big high technology ceramics produces and production of company of ceramics of Hunan Changsha project all belongs to this kind. FD03 razor blade is TiC of horniness dispersion grain was joined in matrix of Si3N4 pottery and porcelain, SW21 razor blade is the SiC brilliant beard that added certain amount in Si3N4, reason has better performance characteristics. A few cutting experts of foreign think, with Si3N4 base effect of steel products of cutting of pottery and porcelain is inferior to Al2O3 base compound pottery and porcelain, reason is not recommended process rolled steel with its. But with FD02, FD03 and hard steel of SW21 cutting temper by dipping in water (better effect is had when 60 ～ 68HRC) , tall manganese steel, tall chromium steel and bearing steel. Ti(C of 2 cermet cutting tool.

N) fund belongs to cermet of cutting tool of pottery and porcelain to also call hard alloy or agglomeration carbide, it is pottery and porcelain - the alloy that metallic composite material is bases with TiC, its hardness and hear resistance are close to pottery and porcelain and bending strength is mixed rupture tenacity is taller than pottery and porcelain, among them metallic carbide is horniness photograph, occupy 80% above commonly; The others is the metallic photograph such as iron, cobaltic, nickel. As binder. Japan is special to cermet favour, nowadays, in metallic cutting domain of Japan. Cermet razor blade already was occupied but 30% of gross of dislocation razor blade, heretofore still is enlarging applied limits. And the United States is occupied only however 5% , but the prospect that somebody can have seen many application cermet in manufacturing industry of adumbrative United States. Cermet hardness is tall, intensity is low, tenacity is low, because this is unfavorable,use below the case that has strong impact and vibration. Fighting caking property and chemical stability is the thermal conductivity of cermet, hear resistance, better than high-speed steel much, accordingly. Wide application was won in cutting tool material. Now, the development direction of cermet is to exceed fine grain is changed and have exterior coat to its. Exceed fine grain cermet to be able to raise cutting rate, usable also will make small size cutting tool. The TiC that occupies modified of 2% ～ 15wt% with accept rice TiN or Ti(CN) fund belong to cutting tool of pottery and porcelain, hardness tall, wearability is good, its thermal stability, thermal conductivity, be able to bear or endure corrode sex, fight the Dou Youming such as intensity of oxidisability and high temperature hardness, high temperature to show an advantage. Compare with photograph of hard alloy cutting tool, the durability of this cutting tool and service life raise 1 ～ 50 times, cutting rate rises 1.

5 ～ 3 times, cost matchs with its or slightly tall, and charge of metallic cutting treatment drops 20%-40% and common Ti(C.

N) fund belongs to photograph of cutting tool of pottery and porcelain to compare, reliability of this cutting tool is higher. Pottery and porcelain of bits of gold of coating of coating cermet cutting tool grows rate at present very rapid. Coating cent is hard coating and soft coating, former and main it is metallic carbon nitride, include TiN, TiC, Ti(CN) , TiAIN, CrC, CrN to wait. Among them the craft of TiN is the most mature. Applying the most extensive hard coat basically is to raise its hardness and wearability. Can have multilayer and compound coat commonly. Latter basically is MoS radical coating, can reduce coefficient of friction. Additional, soft hard coating is OK and compound use. The cutting tool of accept rice coating that the TiC fund of modified of accept rice TiN belongs to cutting tool of pottery and porcelain to be developed by American scholar recently is a kind of when use accept rice technology new cutting tool. The different combination that method of this kind of coating uses a variety of data (be like a metal / metallic combination, metal / combination of pottery and porcelain, pottery and porcelain / lubricant of combination of pottery and porcelain, solid / the) such as metallic combination, in order to satisfy different function and function requirement. Among them TiC/TiN compound coating is typical coating material, it is opposite at be in TiC radical mixes TiN hard metal and character, its bending strength gets rising further, the hardness of cutting tool and tenacity increase significantly. Because its are had,fight attrition exceedingly goodly to wear away again reach self-lubricating function, very agree with at cutting. But the besmear Fu of accept rice coating must use advanced technology, if close a lopsided magnetism splash shoot a way (the parameter control with CFUMS) its accurate requirement and advanced equipment, cause cutting tool cost necessarily rise considerably. Suffer the effect of craft and cutting condition at the same time, the bonding strength of coating may be insufficient, the coating when cutting falls off easily. Cutting function is reduced quickly or invalidation. Namijin belongs to composition of cutting tool of pottery and porcelain to be: 53TiC-10TIN(nm)-18Mo-18Ni-1C, granuality of TiN accept ground rice is 30nm-50nm. The experiment makes clear, each peak value of mechanical function parts the accretion of corresponding and certain accept rice TiN is measured. Experiment according to Hefei industry university, when adding quantity bulk to count 6%-8% . Can obtain relatively the integrated physics of actor is mechanical function. The research train of thought of material of cutting tool of 3 pottery and porcelain and look into a basis Hall-petch concerns, the hardness that grain dimension jumps over material of small pottery and porcelain and intensity are higher. When grain dimension small when be being controlled to 100nm, intensity and hardness can have very big breakthrough. But the active of accept ground rice is very big, interfacial reaction activation can be inferior, be brought up extremely easily in agglomeration process, although join depressor, the effect still is paid no attention to want, because this still does not have material of cutting tool of pottery and porcelain of accept rice class at present,prepare successful report. Rice of accept rice modified, accept is compound and successful the unusually grown problem that solved grain, hammer of particle of accept rice class is plunged into or enter a wrong area to make be formed inside matrix grain inferior crystal boundary, bring about matrix grain to refine. Rice of accept rice modified, accept is compound reaching the research that exceeds material of cutting tool of fine grain pottery and porcelain and development will be henceforth the main way that cutting tool material develops. Material of cutting tool of pottery and porcelain is stuff of a kind of cutting tool of high speed cutting that has an outlook most, aborning has wide applied perspective. Current, it already caused the attention of world each country. The process that makes an appointment with 70% treatment cast in Germany is completed with cutting tool of pottery and porcelain, and year of wastage of cutting tool of Japanese pottery and porcelain the 8% ～ that already occupied cutting tool gross 10% . The development of cutting tool of our country pottery and porcelain is very rapid also, research and development level and international comparative. Cutting tool of pottery and porcelain has very tall wearability, it has better chemical stability than hard alloy, cutting is machined and can last below high speed condition longer when ask, improve efficiency more on average than using hard alloy cutting tool 3 ～ 10 times. It comes true to be ground with car generation, what cast with mill generation is efficient " good processing technique " reach " dry cutting technology " , raise a spare parts to machine exterior quality. Implementation does type cutting, have wide applied perspective to operating ring condition is polluted and reducing production cost. Material of cutting tool of new-style pottery and porcelain has 4 epilogue the dominant position that material of other cutting tool cannot compare, its develop to ask for nothing very big. Carry the research of craft of constituent of pair of material of cutting tool of pottery and porcelain, preparation and data design, can go up in the base that retains tall hardness, tall wearability and red rigid, huge raises the tenacity of cutting tool material and anti-impact properties, preparation accords with contemporary cutting technology to use the appropriate data of the requirement. Can expect, as the use of material of all sorts of cutting tool of new-style pottery and porcelain. Be sure to promote the development of efficient machine tool and technology of high speed cutting, and the promotion of efficient machine tool and technology of high speed cutting and application, drive the use of material of cutting tool of new-style pottery and porcelain further again. CNC Milling CNC Machining