金巴黎彩票

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球墨鑄鐵凝固特性差異 冒口設計有特點

來源:本站整理 秩名 2016-07-18 瀏覽
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一般說來,球墨鑄鐵件產生縮孔、縮松的傾向比灰鑄鐵件大得多,防止收縮缺陷往往是工藝設計中十分棘手的問題。在這方面,從實際生產中總結出來的經驗很不一致,各有自己的見解:有人認為應該遵循順序凝固的原則,在最后凝固的部位放置大冒口,以補充鑄件金巴黎彩票在凝固過程中產生的體積收縮;有人認為球墨鑄鐵件只需要采用小冒口,有時不用冒口也能生產出健全的鑄件。

球墨鑄鐵

YAOZAIQUEBAOZHUJIANZHILIANGDETIAOJIANXIAZUIDAXIANDUDITIGAOGONGYICHUPINLV,JINJINYIKAOKONGZHIZHUTIEDEHUAXUECHENGFENSHIBUGOUDE,BIXUZAILEJIEQIUMOZHUTIENINGGUTEXINGDEJICHUSHANG,QIESHIKONGZHIZHUTIERONGLIAN、QIUHUACHULI、YUNYUCHULIHEJIAOZHUZUOYEDEQUANGUOCHENG,ERQIEYAOYOUXIAODIKONGZHIZHUXINGDEGANGDU。

一、球墨鑄鐵的凝固特性

SHIJISHENGCHANZHONGCAIYONGDEQIUMOZHUTIE,DADUOSHUDOUJIEJINGONGJINGCHENGFEN。HOUBIZHUJIANCAIYONGYAGONGJINGCHENGFEN,BOBIZHUJIANCAIYONGGUOGONGJINGCHENGFEN,DANPIANLIGONGJINGCHENGFENDOUBUYUAN。

金巴黎彩票 GONGJINGCHENGFEN、GUOGONGJINGCHENGFENDEQIUMOZHUTIE,GONGJINGNINGGUSHIDOUSHIXIANZIYEXIANGZHONGXICHUXIAOSHIMOQIU。JISHISHIYAGONGJINGCHENGFENDEQIUMOZHUTIE,YOUYUQIUHUACHULIHEYUNYUCHULIHOUTIEYEDEGUOLENGDUZENGDA,YEHUIZAIYUANGAOYUPINGHENGGONGJINGZHUANBIANWENDUDEWENDUXIAXIANXICHUXIAOSHIMOQIU。DIYIPIXIAOSHIMOQIUZAI1300℃SHENZHIGENGGAODEWENDUXIAJIUYIXINGCHENG。

ZAICIHOUDENINGGUGUOCHENGZHONG,SUIZHUWENDUDEJIANGDI,SHOUPIXIAOSHIMOQIUYOUDECHANGDA,YOUDEZAICIRONGRUTIEYE,TONGSHIYEHUIYOUXINDESHIMOQIUXICHU。SHIMOQIUDEXICHUHECHANGDASHIZAIYIGEHENKUANDEWENDUFANWEINEIJINXINGDE。

SHIMOQIUCHANGDASHI,QIZHOUWEIDETIEYEZHONGTANHANLIANGJIANGDI,JIUHUIZAISHIMOQIUDEZHOUWEIXINGCHENGBAOWEISHIMOQIUDEAOSHITIWAIKE。AOSHITIWAIKEXINGCHENGDESHIJIANYUZHUJIANZAIZHUXINGZHONGDELENGQUESULVYOUGUAN:LENGQUESULVGAO,TIEYEZHONGDETANLAIBUJIKUOSANJUNYUN,XINGCHENGAOSHITIWAIKEJIUJIAOZAO;LENGQUESULVDI,YOULIYUTIEYEZHONGDETANKUOSANJUNYUN,AOSHITIWAIKEDEXINGCHENGJIUJIAOWAN。

AOSHITIWAIKEXINGCHENGYIQIAN,SHIMOQIUZHIJIEYUTANHANLIANGGAODETIEYEZHIJIEJIECHU,TIEYEZHONGDETANYIYUXIANGSHIMOQIUKUOSAN,SHISHIMOQIUCHANGDA。AOSHITIWAIKEXINGCHENGHOU,TIEYEZHONGDETANXIANGSHIMOQIUDEKUOSANSHOUZU,SHIMOQIUDECHANGDASUDUJIJUXIAJIANG。YOUYUZITIEYEZHONGXICHUSHIMOSHISHIFANGDEJIEJINGQIANREDUO,YUE3600 J/g,ZITIEYEZHONGXICHUAOSHITISHISHIFANGDEJIEJINGQIANRESHAO,YUE200 J/g,ZAISHIMOQIUZHOUWEIXINGCHENGAOSHITIWAIKE、SHIMOQIUDECHANGDASHOUZU,JIUHUISHIJIEJINGQIANREDESHIFANGXIANZHUJIANHUAN。ZAIZHEZHONGTIAOJIANXIA,GONGJINGNINGGUDEJINXINGYAOKAOJINYIBUJIANGDIWENDUYICHANSHENGXINDEJINGHE。YINCI,QIUMOZHUTIEDEGONGJINGZHUANBIANYAOZAIPODADEWENDUFANWEINEIWANCHENG,QININGGUDEWENDUFANWEISHIHUIZHUTIEDEERBEIHUOGENGDUOYIXIE,JUYOUDIANXINGDEHUZHUANGNINGGUTEXING。

JIANLVESHUOLAI,QIUMOZHUTIEDENINGGUTEXINGZHUYAOYOUYIXIAJIFANGMIAN。

1、NINGGUWENDUFANWEIKUAN

CONGTIE-TANHEJINDEPINGHENGTUKANLAI,ZAIGONGJINGCHENGFENFUJIN,NINGGUDEWENDUFANWEIBINGBUKUAN。SHIJISHANG,TIEYEJINGQIUHUACHULIHEYUNYUCHULIHOU,QININGGUGUOCHENGPIANLIPINGHENGTIAOJIANHENYUAN,ZAIGONGJINGZHUANBIANWENDU(1150℃)YISHANG150℃ZUOYOU,JIKAISHIXICHUSHIMOQIU,GONGJINGZHUANBIANZHONGLEDEWENDUYOUKENENGBIPINGHENGGONGJINGZHUANBIANWENDUDI50℃ZUOYOU。

凝固溫度范圍這樣寬的合金,以糊狀凝固方式凝固,很難使鑄件實現順序凝固。因此,按鑄鋼件金巴黎彩票的冒口設計原則,使鑄件實現順序凝固,在最后凝固的熱節部位設置大冒口的工藝方案不是很合適的。

YOUYUZAIHENGAODEWENDUXIAJIYOUSHIMOQIUXICHU,BINGFASHENGGONGJINGZHUANBIAN,YE-GULIANGXIANGGONGCUNDESHIJIANHENCHANG,TIEYENINGGUGUOCHENGZHONGTONGSHIFASHENGYETAISHOUSUOHENINGGUSHOUSUO。YINCI,YAOXIANGZHUGANGJIANNEIYANG,TONGGUOJIAOZHUXITONGHEMAOKOUBIJIAOCHONGFENDIBUCHONGYETAISHOUSUOYESHIBUTAIKENENGDE。

2、GONGJINGZHUANBIANGUOCHENGZHONGSHIMODEXICHUDAOZHITIJIPENGZHANG

金巴黎彩票 ZAIGONGJINGWENDUFUJIN,AOSHITIDEMIDUYUEWEI7.3g/cm3,SHIMODEMIDUYUEWEI2.15g/cm3。ZHUJIANNINGGUGUOCHENGZHONG,SHIMODEXICHUHUIDAOZHIXITONGDETIJIPENGZHANG,DAYUEMEIXICHU1%(ZHILIANGFENSHU)DESHIMOKECHANSHENG3.4%DETIJIPENGZHANG。

TUOSHANDILIYONGZHUTIEZHONGDESHIMOHUAPENGZHANG,KEYIYOUXIAODIBUCHANGNINGGUGUOCHENGZHONGDETIJISHOUSUO,ZAIYIDINGDETIAOJIANXIA,KEYIBUYONGMAOKOUSHENGCHANJIANQUANDEZHUJIAN。

YINGGAIZHUZHONGTICHUDESHI:HUIZHUTIEHEQIUMOZHUTIEDOUZAIGONGJINGZHUANBIANGUOCHENGZHONGXICHUSHIMO、FASHENGTIJIPENGZHANG,DANSHI,YOUYULIANGZHONGZHUTIEZHONGSHIMOXINGTAIHECHANGDADEJIZHIBUTONG,SHIMOHUAPENGZHANGDUIZHUTIEZHUZAOXINGNENGDEYINGXIANGYEHENBUYIYANG。

金巴黎彩票 HUIZHUTIEGONGJINGTUANZHONGDEPIANZHUANGSHIMO,YUTIEYEZHIJIEJIECHUDEJIANDUANYOUXIANCHANGDA,SHIMOCHANGDASUOFASHENGDETIJIPENGZHANGDABUFENZUOYONGYUSHIMOJIANDUANJIECHUDETIEYE,YOULIYUPOSHIQITIANCHONGAOSHITIZHIJIANDEKONGXI,CONGERSHIZHUJIANGENGWEIZHIMI。

QIUMOZHUTIEZHONGDESHIMO,SHIZAIAOSHITIWAIKEBAOWEIDETIAOJIANXIACHANGDADE,SHIMOQIUCHANGDASUOFASHENGDETIJIPENGZHANGZHUYAOSHITONGGUOAOSHITIWAIKEZUOYONGZAIXIANGLINDEGONGJINGTUANSHANG,YOUKENENGJIANGQIJIKAI,SHIGONGJINGTUANZHIJIANDEKONGXIKUODA,YEYIYUTONGGUOGONGJINGTUANZUOYONGZAIZHUXINGDEXINGBISHANG,DAOZHIXINGBIYUNDONG。

3、ZHUJIANNINGGUGUOCHENGZHONGSHIMOHUAPENGZHANGYISHIZHUXINGFASHENGXINGBIYUNDONG

金巴黎彩票 QIUMOZHUTIEYIHUZHUANGNINGGUFANGSHININGGU,ZHUJIANKAISHININGGUSHI,ZHUXING-JINSHUJIEMIANCHUDEZHUJIANWAIBIAOMIANCENGJIUBIHUIZHUTIEBODEDUO,ERQIEZENGCHANGHENMAN,JISHIJINGGUOLEJIAOCHANGDESHIJIAN,BIAOCENGRENGRANSHIQIANGDUDI、GANGDUCHADEBOKE。NEIBUFASHENGSHIMOHUAPENGZHANGSHI,ZHEZHONGWAIKEBUZUYINAISHOUPENGZHANGLIDEZUOYONGXIA,JIUKENENGXIANGWAIYIDONG。RUGUOZHUXINGDEGANGDUCHA,JIUHUIFASHENGXINGBIYUNDONGERSHIXINGQIANGZHANGDA。JIEGUO,BUJINYINGXIANGZHUJIANDECHICUNJINGDU,ERQIESHIMOHUAPENGZHANGYIHOUDESHOUSUODEBUDAOBUCHONG,JIUHUIZAIZHUJIANNEIBUCHANSHENGSUOKONG、SUOSONGZHILEIDEQUEXIAN。

4、GONGJINGAOSHITIZHONGDETANHANLIANGGAOYUHUIZHUTIE

金巴黎彩票 JUMEIGUOR. W.HeineDEYANJIUBAOGAO,QIUMOZHUTIEGONGJINGNINGGUGUOCHENGZHONG,AOSHITIZHONGDETANHANLIANGGAOYUHUIZHUTIEZHONGAOSHITIDETANHANLIANG

金巴黎彩票 HUIZHUTIEGONGJINGNINGGUSHI,GONGJINGTUANZHONGDESHIMOPIANJIYUAOSHITIJIECHU,YEYUTANHANLIANGGAODETIEYEZHIJIEJIECHU,TIEYEZHONGDETAN,CHUTONGGUOAOSHITIXIANGSHIMOKUOSANWAI,YEZHIJIEXIANGSHIMOPIANKUOSAN,YINERTIEYE-AOSHITIJIEMIANCHUAOSHITIZHONGDETANHANLIANGJIAODI,YUEWEI1.55%ZUOYOU。

QIUMOZHUTIEGONGJINGNINGGUSHI,GONGJINGTUANZHONGDESHIMOQIUZHIYUAOSHITIKEJIECHU,BUYUTIEYEJIECHU,SHIMOQIUCHANGDASHI,TIEYEZHONGDETANDOUTONGGUOAOSHITIKEXIANGSHIMOQIUKUOSAN,YINER,TIEYE-AOSHITIJIEMIANCHUAOSHITIZHONGDETANHANLIANGJIAOGAO,KEDADAO2.15%ZUOYOU。

QIUMOZHUTIEGONGJINGNINGGUSHI,AOSHITIZHONGDETANHANLIANGKENENGJIAOGAO,ZAITANHANLIANG、GUIHANLIANGXIANGTONGDETIAOJIANXIA,RUBAOCHITONGYANGDELENGQUESULV,ZEXICHUDESHIMOLIANGJIAOSHAO,YINER,GONGJINGNINGGUSHIDETIJISHOUSUOHUILVEDAYUHUIZHUTIE。ZHEYESHIQIUMOZHUTIEJIANJIAOYICHANSHENGSUOKONG、SUOSONGQUEXIANDEYUANYINZHIYI。NINGGUGUOCHENGZHONGBAOCHIJIAODIDELENGQUESULV,SHIYOULIYUSHIMOCHONGFENXICHUDEYINSU。

金巴黎彩票 ZAINENGSHISHIMOHUACHONGFENDETIAOJIANXIA,GONGJINGAOSHITIZHONGDETANHANLIANG(JITANZAIAOSHITIZHONGDEZUIDAGURONGDU)YUZHUTIEZHONGDEGUIHANLIANGYOUGUAN,YIBANKEANXIASHIJISUAN。

碳在奧氏體中的最大固溶度CE=2.045-0.178 Si

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