W18Cr4V高速钢 特性
W18Cr4V为钨系高速钢，具有高的硬度、红硬性及高温硬度。其热处理范围较宽淬火不易过热，热处理过程不易氧化脱碳，磨削加工性能较好。该钢在500℃及600℃时硬度分别保持在HRC57～58及HRC52～53，对于大量的、一般的被加工材料具有良好的切削性能。
W18Cr4V高速钢 用途
形状复杂的小型刀具。
W18Cr4V高速钢 热处理
热处理工艺为前处理是退火，温度为870~880度，保温2~3小时，然后800一840度预热,从1270一1280度分级淬火,分级温度为580一620,然后再560度进行三次回火,回火时保温1小时.
W18Cr4V含大量的合金元素:塑性差,导热性差,在快速加热时的热应力使之变形开裂,所以要在加热到淬火温度1270一1280度在800一840预热,对形状复杂者,还应在500一650增加一次预热.V,W等起主要起提高红硬性的元素要很高的温度下才溶解,但过高的温度又会使晶粒粗大,且W等合金元素都缩小A区,使得共析与共晶温度提高,因而选择1270一1280度.采用直接空冷,会析析出二次碳化物,从而降低钢的红硬性.
淬火后的组织为M十碳化物十残余A(多达30%)在550一570度回火析出WC等引起二次硬化,A分解,析C,降低合金元素含量,使Ms上升,从而造成二次淬火,一次回火,还有15%的残余A,二次回火残余A3%一5%,
三次回火,只有1%一2%,**终得回火组织M十碳化物十极少量残余
SWRCH15A SWRCH16A SWRCH18A SWRCH19A
SWRCH20A SWRCH22A SWRCH10K SWRCH12K SWRCH15K SWRCH16K SWRCH17K SWRCH18K SWRCH20K SWRCH22K SWRCH24K SWRCH25K SWRCH27K SWRCH30K SWRCH33K SWRCH35K SWRCH38K SWRCH40K SWRCH41K SWRCH43K SWRCH45K SWRCH48K SWRCH50K SUP3 SUP6 SUP7 SUP9 SUP9A SUP10 SUP11A SUP12 SUP13 S50C-CSP S55C-CSP S60C-CSP S65C-CSP S70C -CSP SK5-CSP SK4-CSP SUP10-CSP SUJ1 SUJ2 SUJ3 SUJ4 SUJ5 SS330 SS400 SS490 SS540 SM9CK SM15CK SM20CK SM10C SM12C SM17C SM20C SM22C SM25C SM28C SM30C SM33C SM35C SM38C SM40C SM43C SM45C SM48C SM50C SM53C SM55C SM58C
SCR415H SCR420H SCR430H SCR435H SCR440H SNC415H SNC631H SNC815H SNCM220H SNCM420H SCM415H SCM418H SCM420H SCM435H SCM440H SCM445 SCM822H SMN420H SMJN433H SMN433H SMN438H SMN443H SMNC420H SMNC443HSCR21H SCR22H SCR2H SCR3H SCR4H SNC21H SNC2H SNC22H SNCM21H SNCM23H SCM21H SCM22H SCM3H SCM4H SCM5H SCM24H SMN21H SMN1H SMN2H SMN3H SMNC21H SMNC3H SCR415 SCR420 SCR430 SCR435 SCR440 SCR445 SNC236 SNC415 SNC631 SNC815 SNC836 SNCM220 SNCM240 SNCM415 SNCM420 SNCM431 SNCM439 SNCM447 SNCM616 SNCM625 SNCM630 SNCM815 SCM415 SCM418 SCM420 SCM421 SCM430 SCM432 SCM435 SCM440 SCM445 SCM822 SMN420 SMN433 SMN438 SMN443 SMN420 SMN443 SACM645 SUM11 SUM12 SUM21 SUM22 SUM22L SUM23 SUM23L SUM24L SUM25 SUM31 SUM31L SUM32L SUM41 SUM42 SUM43 SWRCH6R SWRCH8R SWRCH10R SWRCH12R SWRCH15R SWRCH17R SWRCH6A SWRCH8A SWRCH10A SWRCH12A SWRCH15A SWRCH16A SWRCH18A SWRCH19A SWRCH20A SWRCH22A SWRCH10K SWRCH12K SWRCH15K SWRCH16K SWRCH17K SWRCH18K SWRCH20K SWRCH22K SWRCH24K SWRCH25K SWRCH27K SWRCH30K SWRCH33K SWRCH35K SWRCH38K SWRCH40K SWRCH41K SWRCH43K SWRCH45K SWRCH48K SWRCH50K
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