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5CrMnMo的成分与选用方法

文章出处:http://lefuxe.cn作者:无锡鲁骏特钢有限公司发表时间:2019/9/19 12:52:34

  1.REZUOMOJUDEGONGZUOTIAOJIAN

  REZUOMOJUBAOKUOCHUIDUANMO、REJIYAMOHEYAZHUMOSANLEI。RUQIANSUOSHU.REZUOMOJUGONGZUOTIAOJIANDEZHUYAOTEDIANSHIYURETAIJINSHUXIANGJIECHU、ZHEISHIYULENGZUOMOJUGONGZUOTIAOJIANDEZHUYAOQUBIE。YINCIHUIDAILAIYIXIALIANGFANGMIANDEWENTI:

  (l)模腔表层金属受热。通常锤锻模工作时.其模腔表面温度可达300~400℃以上热挤压模可达500一800℃以上;压铸模模腔温度与压铸材料种类及浇注温度有关。如压铸黑色金属时模腔温度可达1000℃以上。这样高的使用温度会使模腔表面硬度和强度显著降低,在使用中易发生打垛。为此.对热模具钢的基本使用性能要求是热塑变抗力高,包括高温硬度和高温强度、高的热塑变抗力,实际上反映了钢的高回火稳定性。由此便可以找到热模具钢合金化的第一种途径,即加入Cr、W、Si.等合金元素可以提高钢的回火稳定性。

  (2)模腔表层金属产生热疲劳(龟裂)。热模的工作特点是具有间歇性.每次使热态金属成形后都要用水、油、空气等介质冷却模腔的表面。因此.热模的工作状态是反复受热和冷却,从而使模腔表层金属产生反复的热胀冷缩,即反复承受拉压应力作用.其结果引起模腔表面出现龟裂,称为热疲劳现象,由此,对热模具钢提出了第二个基本使用性能要求.即具有高的热疲劳抗力。一般说来,影响钢的热疲劳抗力的因素主要有:

  ①GANGDEDAOREXING。GANGDEDAOREXINGGAO,KESHIMOJUBIAOCENGJINSHUSHOURECHENGDUJIANGDI,CONGERJIANXIAOGANGDEREPILAOQINGXIANGXING。YIBANRENWEIGANGDEDAOREXINGYUHETANLIANGYOUGUAN,HANTANLIANGGAOSHIDAOREXINGDI,SUOYIREZUOMOJUGANGBUYICAIYONGGAOTANGANG。ZAISHENGCHANZHONGTONGCHANGCAIYONGZHONGTANGANG(C0.3%5~0.6%)HETANLIANGGUODI.HUIDAOZHIGANGDEYINGDUHEQIANGDUXIAJIANG.YESHIBULIDE.

  ②GANGDELINJIEDIANYINGXIANG。TONGCHANGGANGDELINJIEDIAN(Acl)YUEGAO.GANGDEREPILAOQINGXIANGXINGYUEDI。YINCI.YIBANTONGGUOJIARUHEJINYUANSUCr、W、Si、YINLAITIGAOGANGDELINJIEDIAN。CONGERTIGAOGANGDEREPILAOKANGLI.

  2.CHANGYONGREZUOMOJUYONGGANG

  (1)CHUIDUANMOYONGGANG。YIBANSHUOLAI,CHUIDUANMOYONGGANGYOULIANGGEWENTIBIJIAOTUCHUYISHIGONGZUOSHISHOUCHONGJIFUHEZUOYONG.GUDUIGANGDELIXUEXINGNENGYAOQIUJIAOGAO,TEBIESHIDUISUBIANKANGLIJIRENXINGYAOQIUJIAOGAO;ERSHICHUIDUANMODEJIEMIANCHICUNJIAODA(<400mm)GUDUIGANGDECUITOUXINGYAOQIUJIAOGAO,YIBAOZHENGZHENGGEMOJUZUZHIHEXINGNENGJUNYUN。

百人牛牛  CHANGYONGCHUIDUANLOUYONGGANGYOU5CrMnMo、5CrMnMo、5CrNiW、5CrNiTiJI5CrMnMoSiVDENG。BUTONGLEIXINGDECHUIYANMOYINGXUANYONGBUTONGDECAILIAO。DUITEDAXINGHUODAXINGDECHUIDUANMOYI5CrNiMoWEIHAO.YEKECAIYONG5CrNiTi、5CrNiWHUO5CrMnMoSiDENG。DUIZHONGXIAOXINGDECHUIDUANMOTONGCHANGXUANYONG5CrMnMOGANG。

  (2)REJIYAMOYONGGANG,REJIYAMODEGONGZUOTEDIANSHIJIAZAISUDUJIAOMAN,YINCI,MOQIANGSHOUREWENDUJIAOGAO,TONGCHANGKEDA500YI800℃。DUIZHEILEIGANGDESHIYONGXINGNENGYAOQIUYINGYIGAODEGAOWENQIANGDU(JIGAODEHUIHUOWENDINGXING)HEGAODENAIREPILAOXINGNENGWEIZHU。DUIakJICUITOUXINGDEYAOQIUKESHIDANGFANGDI。YIBANDEREJIYAMOCHICUNJIAOXIAO,CHANGXIAOYU70~90 mm .

百人牛牛  CHANGYONGDEREJIYAMOYOU4CrW2Si、3Cr2W8VJI5%CrXINGDENGREZUOMOJUGANG.QIZHONG4CrW2Si.JIKEZUOLENGZUOMOJUGANG,YOUKEZUOREZUOMOJUGANG.YOUYUYONGTUBUTONG,KECAIYONGBUTONGRECHULIFANGFA。ZUOLENGMOSHICAIYONGJIAODIDECUIHUOWENDU(870—900℃)JIDIWENHUOZHONGWENHUIHUOCHULI;ZUOREMOSHIZECAIYONGJIAOGAODECUIHUOWENDU(YIBANWEI950YI1000℃)JIGAOWENHUIHUOCHULI。

百人牛牛  (3)YAZHUMOYONGGANG。CONGZONGTISHANGKAN,YAZHUMOYONGGANGDESHIYONGXINGNENGYAOQIUYUREJIYAMOYONGGANGXIANGJIN,JIYIYAOQIUGAODEHUIHUOWENDINGXINGYUGAODEREPILAOKANGLIWEIZHU。SUOYITONGCHANGSUOXUANYONGDEGANGZHONGDATISHANGYUREJIMOYONGGANGXIANGTONG.RUCHANGCAIYONG4CrW2Si.HE3Cr2W8VDENGGANG。DANYOUYOUSUOBUTONGRUDUIRONGDIANJIAODIZnHEJINYAZHUMO.KEXUANYONG40Cr、30CrMnSiJI40CrMoDENG;DUIAlHEMgHEJINYAZHUMO,KEXUANYONG4CrW2Si、4Cr5MoSiVDENGDUICuHEJINYAZHUMO.DUOCAIYONG3Cr2W8VGANG。

百人牛牛  JINNIANLAI.SUIZHEHEISEJINSHUYAZHUGONGYIDEYINGYONG,DUOCAIYONGGAORONGDIANDELVHEJINHENIEHEJIN.HUOZHEDUI3Cr2W8VGANGJINXINGCr-Al-SISANYUANGONGSHEN,YONGYIZHIZAOHEISEJINSHUYAZHUMO。***JINGUONEIWAIHAIZHENGZAISHIYANCAIYONGGAOQIANGDUDETONGHEJINZUOHEISEJINSHUDEYAZHUMOCAILIAO。