Film is in the diamond that be not brilliant the application on high-speed steel tap

5 3.

Model of 515 Yang family names is measured, 1200 resistor of 700 1000 ～ of GPa ≥ are led, thermal conductance of 1012 1016 of Wcm 108 ～ , belt of optics of W/cm2 · K 18 20 is unoccupied place, EV 2.

6 5.

45 tap are mechanical the uses extensively cutting tool in making, in recent years our country tap is annual bad news dosage makes an appointment with 40 million, life of every tap tap is amounted to 3.

5 ～ 4m, it is namely high grade article, life of the tap in be being used actually often is less than 3m, with foreign tap life (≥ 10m) photograph is compared, still have bigger difference. To make homebred tap is achieved or approach foreign product level, a lot of manufacturer made indefatigable effort, from quality of material composition, metallurgy, heat treatment, treatment design of craft, knife structure reachs exterior plated film to waited for each respect to undertake exploration, however effects is very small. Because this country industry thinks generally, the film such as TiN, TiC, TiCN, CrN, TiAlN does not have action of how many gain to tap life, many manufacturer abandoned the effort of tap plated film almost. Company of development of 100 accept science and technology connects Shaanxi to analyse character of the function character of plated film of diamond of accept Mi Feijing and craft too, think this kind of plated film suits to apply on tap. At present Swiss PLATIT company already had product of kind of diamond film tap, just hardness of its film layer is inferior. 100 offer company will be not Shaanxi diamond film uses any crystalline substance at high-speed steel tap, development goes tall wearability tap, undertook applied assessing in several factories. Article key analyses high-speed steel plating to be not brilliant diamond after film, film / base the result of experiment of the function after the test result of adhesion, coefficient of friction, wearability and plated film of high-speed steel tap and practical assessment, offer rational application and diamond of brilliant of sufficient play blame the measure of velar latent capacity. Test piece of data of test of 2 tests program and tap material all are W6Mo5Cr4V2 high-speed steel, have heat treatment by standard of heat treatment of groovy high-speed steel; Ra0 of 5mm of × of F20 of test piece dimension, surface roughness.

4, grind make machine with M12 of tap M3 ～ . Pre-treatment of test specimen of plated film craft: Acetone ultrasonic cleans → bath → to go alcohol of ionic bath → cleans → to blow dry, deposit reserve in dry container. Use Shaanxi 100 accept science and technology develops what proper motion of finite liability company develops to filter machine of plated film of ion of cathode vacuum electric arc (machine of plated film of diamond of JM-1 blame brilliant) the deposit on test specimen diamond that be not brilliant film, in optimize parameter to fall, deposit 30 minutes. Test project plated film and base material adhesion determine: Add test meter of exert oneself nick with WS-2000 coating, determine by JB/T 8554-1997 standard velar layer burst or the critical load that flake. Every test piece is measured 3 times, take its average to regard this test piece as film / base adhesion. Coefficient of friction determines: With UMT-2M model (bolt disk type) attrition experiment machine, with reciprocate means determines the coefficient of friction of velar layer and steel ball. F4mm of steel ball diameter, hardness 62HRC, load is 2N, relative to athletic speed 18mm/s. Wearability experiments: Press ISO3160-3:1993 standards, bolt is made on machine of MS-2 attrition experiment dish wearability experiments. Wheelhead is ball of diametical F8mm steel, hardness 61 ～ 64HRC, to load 2N, rotate speed is 120r/min. Serve as the revolution when appearing to grind mark continuously it is thus clear that wear away life. Tap efficiency experiments: Tap tap life test is made on Z525 vertical drilling machine by JB/T 969-94 standard. Material trying semifinished product is 40Cr character, hardness 200 ～ 220HB, 366r/min of main shaft rotate speed, cutting speed 6.

9m/min, the precision that hold clip 0.

05 ～ 0.

09mm, emulsion is cooling. Express diamond of 2 blame brilliant film (the coefficient of friction of base material of film of coefficient of friction of Ta-c) and commonly used plated filmµParameter origin Ta-c W6Mo5Cr4V2 0.

092 experiments Cr12MoV 0.

098Steel of TiN industry pattern 0.

TiCN 0 of data of company of 55 Switzerland PLATIT.

2TiAlCN 0.

5CrN 0.

3TiAlCN 0.

The rank of coefficient of friction after W6Mo5Cr4V2 of high-speed steel of coefficient of friction and plated film of mould steel Cr12MoV expresses 253 tests result and diamond of analytic blame brilliant 2. List the coefficient of friction of a few kinds of commonly used plated film serves as contrast at the same time. From the watch 2 can see, on high-speed steel and mould steel place plating is not brilliant diamond the µ of coefficient of friction of film and ball steel ball is 0.

092 ～ 0.

098, the coefficient of friction that compares film of commonly used putamen is low much. Also many document report are not brilliant diamond ≤ of µ of coefficient of friction 0. 08, test a requirement via understanding its deep, be informed test wheelhead to be beryl ball, reason its coefficient of friction under this test result. Because be not brilliant diamond,film is by the carbon that has low coefficient of friction SP3 of the isomer that be the same as element is mixed SP2 is miscellaneous change bond structure composition, and film is very even, compact, smooth, consequently film has this kind of diamond that be not brilliant very low coefficient of friction, can be being regarded is to have self-lubricating functional film. The adhesion of film and base material is not the diamond that be not brilliant brilliant diamond film and adhesion of high-speed steel base material determine result rank is expressed 3. By the watch 3 knowable, highest and critical load is amounted to in test specimen 22.

The 75N, smallest for 17.

15N, average and critical load is 3 sample 19.

15N. Because plated film ply is 150 ～ 200nm about, determine on WS-2000 nick appearance so thin plated film, income data often on the low side. The adhesion that film reachs rolled steel to go up in silicon, glass compares the diamond that be not brilliant tall, this is main with the diamond that be not brilliant film with inferior embedded nucleate growing process concerns the surface. If the plated film of pure surface process, criterion adhesion is normally inferior. Express diamond of 3 blame brilliant the No of adhesion sample size of film and high-speed steel base material is critical load Lc(N) is average and critical load Lc(N) 1 20.

40 20.

27 22.

75 17.

67 2 18.

10 19.

52 18.

15 22.

30 3 17.

15 17.

65 17.

77 18.

02 graphs velar wearability is in diamond of 1 blame brilliant MS-2 attrition is opposite on experiment machine when plated film of high-speed steel tap (in all 84 furnace) dog piece have plug dish wearability experiments. Test result is shown 1 times like the graph. Life of wear-resisting of plated film lowest is 21, 410 turn, highest life is 63, 996 turn, in 30, 000 ～ 50, 000 turn limits is occupied 73.

81% , this shows plated film has very good quality stability. And not the revolution of high-speed steel wear-resisting of plated film has 200 to turn only the left and right sides. Accordingly, in lab standard bolt dish wear away below the condition, high-speed steel plating is not brilliant diamond after film, wearability raises 106 ～ 319 times. Although place plating is not brilliant diamond film is very thin, but the result that its improve wearability is very remarkable. Generally speaking, the wearability of plated film basically depends on the hardness of plated film, coefficient of friction, film! Base ply of layer of adhesion, film. Film belongs to the diamond that be not brilliant exceed putamen, coefficient of friction is small, film! Base adhesion is tall, although have the ply of accept rice class only, also have very tall wearability. We discover when optimizing craft, be like film / base adhesion (critical load) under 10N when, the wearability of velar layer becomes poor apparently. The rank of result of cutting efficiency test of velar tap expresses diamond of plating blame brilliant 4. The average cutting life of M6 tap of film compares diamond of plating blame brilliant not the average cutting life of plated film tap rises 5.

6 times; Average cutting life compares the M10 tap of plated film not life of plated film tap rises 2.

46 times. Visible tap plating is not brilliant diamond after film, can raise tap effectively to enlist in army life. Discovery is returned in the experiment, in order to wear away the tap of means invalidation, cutting life is taller; And the tap of collapse blade invalidation, its life is briefer. This specification is become only in order to wear away when means invalidation, ability produces the diamond that be not brilliant adequately wear-resisting latent capacity of film. Express 4 plating to be not brilliant diamond aperture of means of invalidation of life of cutting of plated film of norms of tap of No of result of test of efficiency of velar tap cutting figures length (M) 1-1 M6 Ta-c 186 1.

674 wear away 1-2 M6 Ta-c 187 1.

683 wear away 1-3 M6 Ta-c 54 0.

1-4 M6 Ta-c 112 1 of 486 collapse blade.

1-5 M6 Ta-c 87 0 of 008 collapse blade.

783 collapse blade, wear away 2-1 M6 not plated film 30 0.

2-2 M6 of 27 collapse blade not plated film 20 0.

2-3 M6 of 18 collapse blade not plated film 8 0.

2-4 M6 of 072 collapse blade not plated film 12 0.

2-5 M6 of 108 collapse blade not plated film 22 0.

3-1 M10 Ta-c 10 of 198 collapse blade.

03 have wear away, still can use 4-1 M10 not plated film 2.

9 wear away, collapse blade notes: * tap of two groups of M6 is supervised by quality of national cutting tool examine the center determines; Tap of two groups of M10 is ** place of workshop of experiment of some large tool works makes a test, its cutting speed is 5.

6m/min. Plating of place of 100 offer company is not Shaanxi of 4 application assessment tap of velar high-speed steel already offerred brilliant diamond to apply to tens of home factories, treatment object has alloy of steel of 40Cr, 42CrMo, 30CrMo, 16Mn, easy cutting, casting pig, titanium to wait for material, tap norms from M1.

5 ～ M20 a variety of. User feedback information makes clear, plating is not brilliant diamond after film, the service life of tap rose 0.

67 ～ 4.

56 times (5) seeing a table. Because the tap quality of production of different tool factory has very big difference, and material of the use condition of the user, treatment differs character, because this plating is not brilliant diamond the service life difference of velar tap is bigger. But a lot of users are mirrorred, with wearing away its life raises the plated film tap of means invalidation to be in 2 times above (improve life its invalidation means is 2 times the following plated film tap mostly collapse blade, break off) . Express 5 users to use norms of report No tap to machine life of tap of object plated film not life of tap of plated film of life of plated film tap enhances diploid user name material hardness 1 M6 HT200 240HB 16m 5m 2.

Aperture of 2 M6 HT200 220HB 347 of limited company of car of 2 gods dragon 192 aperture 0.

3 M12 HT200 220HB 15m 9m 0 of joint-stock company of 81 standards industry.

Aperture of 4 M11 30CrMo 230HB 200 of plant of 67 Shaanxi car 100 aperture 1.

5 M3 of factory of machine tool of 0 treasure chicken.

5Y12 200 aperture 65 aperture 2.

6 M7 of 08 Oriental machinery plants.

5Aperture of Y15 229HB 5000 900 aperture 4.

Aperture of 7 M4 42CrMo 40HRC 24 of limited company of cutting tool of 56 Qinghai measure 10 aperture 1.

8 M1 of works of tool of 4 brilliance numerical control.

6 titanium alloy 20 aperture 5 aperture are versed in south cc of 3 short for Shaanxi Province a limited company 5 analysises and discuss overcome means of collapse blade invalidation, the analysis of invalidation of wear-resisting latent capacity of tap of plated film of square can sufficient play makes clear, not plated film tap is when collapse blade invalidation, blade of cutting of its adjacent tine and tine top already happened to wear away badly (2a) seeing a picture, and after invalidation of blade of collapse of plated film tap, the cutting blade that its adjacent ages has not see wear away evidence (2b) seeing a picture. This explains in order to die when blade means invalidation, did not develop the wear-resisting latent capacity of plated film. This experiments in tap efficiency and get confirming adequately in the relation of life of the tap in user report and invalidation means. Want to overcome invalidation of tap collapse blade, must improve the primary quality of tap, the class status that improves material to pledge namely and metallurgy quality (include carbide size, configuration, distributinging) , improve heat treatment and treatment quality, fight force with raising the tenacity of tap and fatigue crackle to produce, reduce breach sensitivity, this needs the joint efforts of steelworks and tool works. Prevent temperature to lift, velar function is not diamond of protective blame brilliant film is in brilliant diamond when 600 ℃ of temperature ≥ , can produce graphitization liability, namely by structure of black lead of SP2 of translate into of SP3 diamond structure, right now the hardness of plated film is mixed film / base adhesion can be reduced significantly, it is so when job of plated film tap, need to prevent tap surface temperature to lift. Take significant cooling step, to raising the diamond that be not brilliant the cutting efficiency of velar tap is very beneficial. The basis carries out experience estimation, when be like the job, ℃ of ℃ of <600 of tap instantaneous temperature, <500 of the temperature when growing, or velar tap machines diamond of plating blame brilliant not only nonferrous metal, and also process steely data, can improve life effectively. Tap is bright and clean spend tall, hardness to be helpful for high because on tap plating is not brilliant diamond,improving tap life film, ply of its film layer has 150 ～ 200nm only, if precision of tap surface surface roughness is not tall, its protruding needle nods extremely easy in working process collapse, the plated film on its is nonexistent already, expose a base material, ability of wear-resisting of plated film whole is lost. Wearability experiment makes clear, bright and clean degree more tall, the wearability of plated film has healed. The plated film of accept rice class asks to harder matrix is made rely on, when getting power in order to prevent, happen be out of shape, cave in, because this raises matrix hardness moderately,be helpful for developing the wear-resisting latent capacity of plated film. Of course, matrix hardness is exorbitant, the tenacity of material can be reduced, can have the anxiety of collapse blade again, because this needs to undertake optimizing choosing to the hardness of matrix, integrated balance. (A)M4 not plated film tap, collapse blade invalidation, photograph adjacent not fracture of wire buckles blade ministry and top of collapse blade tine to have wear away badly (tap of B)M4 plated film, collapse blade invalidation, photograph adjacent silk buckles blade ministry and tine top to did not see wear away graph film has diamond of brilliant of 26 epilogue blame tall hardness, low coefficient of friction and good film - base adhesion, have very tall wearability consequently. 100 accept science and technology develops Shaanxi the production of the tall wear-resisting tap that finite liability company develops successfully and user uses a proof: Film can raise the deposit on high-speed steel tap diamond that be not brilliant significantly the service life of tap, apply tap of this kind of plated film at nonferrous metal, steel and cast-iron treatment to be able to obtain satisfactory result. In addition, 100 offer company still is Shaanxi diamond of brilliant of blame of Fu of plating of a large number of cutting tool of the user, measure, mould film, all improved service life significantly. 100 offer company determines in coefficient of friction of plated film tap and tap gets Shaanxi respectively in efficiency experiment lubricant state key laboratory and quality of national cutting tool supervise solid body of Chinese Academy of Sciences examine central assistance, still many users offer plated film tap to use a report, express Xie Chen sincerely here. CNC Milling CNC Machining