High-powered fusion high-speed steel

The 2% quantities that contain carbon, form 95W18Cr4V. Balance carbolic theory according to chemistry, can be in the quantity containing carbon in quenching high-speed steel austenite increases when heating, enhance the dispersion sclerosis action when temper, raised normal temperature and high temperature hardness thereby. Compare with W18Cr4V photograph, the wearability of 95W18Cr4V and cutting tool durability rise somewhat, blade grinds function to comparative. The cutting function that this steel plants although not as good as high-speed steel of tall cobalt, tall vanadium, but low-cost, cutting blade can be ground very tartly, reason has applied value. Same, still have high-speed steel of 100W6Mo5Cr4V2(CM2) tall carbon. 2 tall cobaltic high-speed steel add cobalt in high-speed steel, when can promoting temper from carbide of tungsten of the separate out in martensite, molybdenum, improve dispersion sclerosis result, increase thermal stability, reason can raise hardness of normal temperature, high temperature and wearability. Increase the quantity that contain cobalt to return the thermal conductivity of ameliorable steel, reduce the coefficient of friction between cutting tool, workpiece. The representative steel that M42 is American this respect is planted, terribly of its integral performance is advantageous. Swedish HSP-15 also is this kind steel is planted, but its contain vanadium to measure for 3% , blade grinds processability to be inferior to M42. Cobaltic content tall, price is high, do not fit Chinese national condition. Our country develops Co5Si of successful the low cobaltic high-speed steel that contain silicon, performance is superior, the price is mixed under M42 HSP-15, but Co5Si contains vanadium to measure Yi Da 3% , blade grinds processability also poorer, reason is unfavorable make the cutting tool with blade complex form with its. High-speed steel of Gao Fan of high-speed steel of 3 tall vanadium (the vanadium content that is like B201, B211, B212) is 3% ～ 5% , increase carbolic content at the same time, form VC and V4C3, make high-speed steel gets tall hardness and wearability. The hear resistance it may not be a bad idea of tall vanadium high-speed steel, but the blade of tall vanadium high-speed steel grinds processability difference, thermal conductivity is bad also, concussion tenacity is inferior, reason is unfavorable use at complex cutting tool. Also can join proper cobalt in tall vanadium high-speed steel, become Gao Fan to contain cobaltic high-speed steel. The Gao Fan that our country develops contains V3N of azotic high-speed steel, low-cost, cutting function it may not be a bad idea, only it is more difficult that blade is ground. Develop a Co3N(W12Mo3Cr4VCo3N) of the low cobaltic high-speed steel that contain nitrogen again later, cutting function is very good, blade grinds function Yi Jia, but V3N of price prep above. Development of our country of the 4 high-speed steel that contain aluminium goes those who do not have cheap of cobaltic, price to contain aluminous high-powered high-speed steel 501. Among them aluminous content is about 1% . Aluminium can raise tungsten, molybdenum the solubility in steel, and aggrandizement of generation solid dissolve, can rise in steel as a result of aluminous compound " the hammer is plunged into " action, hardness of the normal temperature of reason steel, high temperature and wearability all are able to rise, intensity and tenacity are taller also, cutting function and M42 comparative. The vanadium content of 501 is 2% , blade grinds function to inferior a bit at M42. 5F6 also is to contain aluminium the high-powered high-speed steel of 1% , aluminium also is contained in B201, B211, B212. The high-speed steel that contain aluminium is an original creation of China. 501 get applied extensively in home, also get applied in abroad; The application of the other high-speed steel that contain aluminium is inferior to 501 extensive. When material of cutting difficult treatment, ought to reasonable the high-powered high-speed steel that chooses different name. The difficult treatment material with common cutting, wait like alloy of stainless steel of high strenth steel, austenite, high temperature, titanium alloy, afore-mentioned all sorts of high-powered high-speed steel can be chosen, the mechanical function of high-speed steel of Lv of main take an examination when choosing and blade grind function: Below rough machining or interrupted cutting condition, should choose the high-powered high-speed steel with bending strength and concussion taller tenacity; When finish machining, want water with what pound tenacity to the bending strength of high-speed steel inferior, basically consider its wearability at this moment; When machining complex tigidity is poor, when the name that chooses high-speed steel and rough machining identical; When machining complex tigidity is good, the name that chooses high-speed steel and precision work are same; Blade complex cutting tool, the low vanadium tall cobalt with should choose blade to grind function better or low vanadium contain aluminous high-speed steel; Blade simple cutting tool, can choose blade to grind the Gao Fan high-speed steel with poor performance. The chemical composition of high-powered high-speed steel and composition of chemistry of brand of high-speed steel of mechanical performance list (GPa of bending strength of 600 ℃ HRC pounds hardness of high temperature of HRC of hardness of %) normal temperature 95W18Cr4V0 of tenacity MJ/m2CWMoCrVCoMnSiAl other.

90 ～ 1.

0017.

5 ～ 19.

0 ≤ 0.

33.

80 ～ 4.

401.

00 ～ 1.

40- ≤ 0.

40 ≤ 0.

40--67 ～ 68523.

000.

17 ～ 0.

22W6Mo5Cr4V2Al (501)1.

05 ～ 1.

205.

50 ～ 6.

754.

50 ～ 5.

503.

80 ～ 4.

401.

75 ～ 2.

20- ≤ 0.

40 ≤ 0.

600.

30 ～ 1.

6954 ～ of 20-68 ～ 553.

50 ～ 3.

800.

20W12Mo3Cr4V3N (V3n)1.

10 ～ 1.

2511.

0 ～ 12.

52.

50 ～ 3.

503.

50 ～ 4.

102.

50 ～ 3.

10----N0.

04 ～ 0.

1067 ～ 70552.

00 ～ 3.

500.

15 ～ 0.

40W12Mo3Cr4V3Co5Si (Co5Si)1.

20 ～ 1.

3511.

5 ～ 13.

02.

80 ～ 3.

403.

80 ～ 4.

402.

80 ～ 3.

404.

70 ～ 5.

10 ≤ 0.

400.

80 ～ 1.

20--59 ～ 70542.

40 ～ 2.

700.

11W10Mo4Cr4V3Al (5F6)1.

30 ～ 1.

459.

00 ～ 10.

503.

50 ～ 4.

503.

80 ～ 4.

502.

70 ～ 3.

20- ≤ 0.

50 ≤ 0.

500.

70 ～ 1.

20-68 ～ 69543.

070.

20W6Mo5Cr4V5SiNbAl (B201)1.

55 ～ 1.

655.

00 ～ 6.

005.

00 ～ 6.

003.

8 ～ 4.

404.

20 ～ 5.

20- ≤ 0.

401.

00 ～ 1.

400.

30 ～ 0.

70Nb0.

20 ～ 0.

5066 ～ 68513.

600.

27W6Mo5Cr4V5Co3SiNbAl (B211)1.

60 ～ 1.

906.

005.

504.

005.

003.

00-1.

00 ～ 1.

401.

20Nb0.

35----W18Cr4V4SiNbAl (B212)1.

48 ～ 1.

5817.

5 ～ 18.

5-3.

80 ～ 4.

403.

80 ～ 4.

40--1.

00 ～ 1.

401.

00 ～ 1.

60Nb0.

10 ～ 0.

2067 ～ 69512.

30 ～ 2.

500.

11 ～ 0.

22110W1.

5Mo9.

5Cr4VCo8(M42)1.

05 ～ 1.

151.

00 ～ 2.

009.

00 ～ 10.

003.

80 ～ 4.

400.

80 ～ 1.

507.

50 ～ 8.

50 ≤ 0.

40 ≤ 0.

40--67 ～ 69552.

70 ～ 3.

800.

23 ～ 0.

30W9Mo3Cr4V3Co10 (HSP-15)1.

20 ～ 1.

308.

50 ～ 10.

02.

90 ～ 3.

503.

80 ～ 4.

402.

80 ～ 3.

409.

00 ～ 10.

00----67 ～ 69562.

350.

15 authors ever had made lathe tool of a variety of high-powered high-speed steel and common high-speed steel (shift of steel 36CrNi4MoVA(of high strenth of cutting of W18Cr4V) lathe tool is simple, the contrast of HRC43-46) experiments. Parameter of cutting tool geometry; Before ° of horny γ 0=4, ° of R=45 of κ of tool cutting edge angle, =0 of ε of γ of radius of circular arc of point of a knife.

2mm. P=1mm of cutting deepness α , feed F=0.

1mm. The wear curve of partial cutting tool sees a picture 1. T- ν curve sees a picture 2. See by the graph, the wearability of cutting tool of all sorts of high-powered high-speed steel and service life all prep above W18Cr4V is very much. And V3N and Co5Si precede particularly. 36CrNi4MoVA is difficult treatment material, high-powered high-speed steel adds material hard in cutting when its advantage particularly remarkable. Graph 1 high-powered high-speed steel and high strenth of turning of common high-speed steel the material of wear curve workpiece of steel: Material of 36CrNi4MoVA cutting tool: 1.

V3N 2.

Co5Si 3.

B201 4.

M42 5.

W18Cr4V pursues 2 high-powered high-speed steel and high strenth of turning of common high-speed steel the T- ν curve of steel CNC Milling CNC Machining