A kind of high speed cutting tool

A kind of high speed cutting tool

  • CN 104,805,348 B
  • Filed: 05/18/2015
  • Issued: 12/01/2017
  • Est. Priority Date: 05/18/2015
  • Status: Active Grant
First Claim
Patent Images

1. a kind of high speed cutting tool, it is characterised in that the high speed cutting tool is made of cermet, the metal potteryPorcelain includes hard phase and Binder Phase, and chemical composition is by weight percentage:

  • TiC:

    2.5 ~ 12.8%, Cr3B2;

    8.8 ~ 10.6%,Mo:

    6 ~ 8%, C:

    0.6 ~ 1.8%, Ni:

    18 ~ 26%, surplus is(

    Tix, Wy

    C and inevitable impurity, wherein x:

    0.32 ~ 0.41, x+y=1;

    Wherein TiC, Cr3B2With(

    Tix, Wy

    C is hard phase, the average grain of TiC phases in the longitudinal section below tool surface at 1mmFootpath is 0.08 ~ 0.12 μ

    m, Cr3B2The average grain diameter of phase is 0.28 ~ 1.0 μ

    m,(

    Tix, Wy

    The average grain diameter of C phases is 0.11 ~ 0.18μ

    m,(

    Ti, W, Mo)

    C solid solution is looped around around the hard phase;

    At center cutter position, the average grain diameter of TiC phases is 0.21 ~ 0.52 μ

    in the longitudinal section for the spheroid that a diameter of 0.5mm is formedM, Cr3B2The average grain diameter of phase is 0.58 ~ 0.88 μ

    m,(

    Tix, Wy

    The average grain diameter of C phases is 0.21 ~ 0.26 μ

    m,(

    Ti, W, Mo)

    CSolid solution is looped around around the hard phase;

    The preparation method of the high speed cutting tool comprises the following steps:



    1)

    Dry grinding:

    By required material rate by TiO2Powder, the mixing of W powder, dry type ball milling, ratio of grinding media to material 50 are carried out using ball mill:

    1~60;

    1, Ball-milling Time is 48 ~ 50 hours, and Material quality of grinding balls is stainless steel;



    2)

    Wet-milling:

    To the obtained mixture of dry grinding with(

    Tix, Wy

    C powders, Cr3B2Powder, TiC particles, Mo powder, C powder, Ni powder mixBall milling, ratio of grinding media to material 5 are carried out using wet milk humidification grinding agent after closing uniformly;

    1~8;

    1, rotating speed is 180 ~ 260rpm, the wet-milling timeFor 28 ~ 40 hours;



    3)

    Drying, to step(

    2)

    Slurry after wet-milling is dried, and the powder after drying crosses the sieve of 100 ~ 120 mesh;



    4)

    Shaping:

    By step(

    3)

    Obtained mixed-powder mixes in moulding press with forming agent, compression molding, pressure be 210 ~360MPa, the high speed cutting tool base substrate being molded;



    5)

    Degreasing:

    Base substrate is inserted into degreasing in debinding furnace;



    6)

    Vacuum-sintering:

    By step(

    5)

    Obtained base substrate, which is inserted in vacuum sintering furnace, to be sintered, and vacuum is 0.8 Χ

    10-1~2.1Χ

    10-1Pa, sintering temperature are 1460 ~ 1468 DEG C, and sintering time is 80 ~ 100min, obtains high speed cutting tool finished product;



    7)

    By step(

    6)

    Obtained finished product is heated to 1000 ~ 1100 DEG C in resistance furnace, is incubated jet hardening after 20 ~ 35min;



    8)

    Stove is as cold as room temperature after quenching is incubated 30 ~ 38min after being cooled to 120 ~ 180 DEG C.

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