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無芯感應電爐熔煉灰鑄鐵的幾個問題

來源:中國鑄造協會 李傳栻 2016-06-30 瀏覽
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WUXINGANYINGDIANLURONGLIANZHUTIE,CONGSHANGSHIJI30NIANDAICAIYONGDIANDONGJIQUDONGDEBIANPINDIANYUANKAISHI,SUIHOUYONG50/60 HzDEGONGPINDIANYUAN,HOULAIYOUJINERFAZHANDAOCAIYONGBIANPINZHONGPINDIANYUAN。

SHANGSHIJI60NIANDAIHOUQI,JINGZHAGUANJINGTAIBIANPINDIANYUANDEYINGYONG,DAOZHIZHUTIEXINGYEZHONGCAIYONGWUXINGANYINGDIANLUZUOWEIRONGLIANSHEBEIDEQIYEZHUJIANZENGDUO,YOUQISHI70NIANDAINIBIANDIANYUANDEKAIFA,ZHONGPINWUXINGANYINGDIANLUDEDIANYUANYOULEZHONGDADEGAIJIN,PINLVZHUANBIANXIAOLVKETIGAODAO97%~98%,RONGHUAZHUTIESHIREXIAOLVKEDADAO70%,TONGSHI,DIANLUSHEBEIHESUOYONGDENAIHUOCAILIAOYEZAIBUDUANFAZHAN,YINERQIYINGYONGRIYIGUANGFAN。

對于不適于采用長爐齡大型沖天爐的中、小型鑄造廠,用無心感應電爐熔煉有很多優點,主要如:

l RONGLIANSHIPAICHUDEFEIQI、YANCHENHELUZHADAFUDUJIANSHAO,BIANYUZHILIHUANJINGHEGAISHANZUOYETIAOJIAN;

l KELIYONGLIANJIADEJINSHULULIAO,YOUQISHIBIANYUXUNHUANHUIYONGJIAGONGDEQIEXIEHEBIANJIAOYULIAO;

金巴黎彩票 l SHENGCHANANPAIDELINGHUOXINGJIAOHAO;

金巴黎彩票 l ZHUTIEDEHUAXUECHENGFENHEWENDUBIJIAOJUNYUNQIEYIYUKONGZHI。

但是,感應電爐熔煉的冶金過程與沖天爐有很大的的差別,如果不能切實了解其冶金特點,從而正確安排熔煉和各項后處理作業,則生產鑄鐵件時,往往會出現顯微組織不符合要求、鑄件金巴黎彩票的加工性能惡化等各種問題,不能確保鑄件的質量要求。

一、感應電爐與沖天爐熔煉過程中的不同之處

CHONGTIANLUSHIYIJIAOTANWEIRANLIAODESHULU,WUXINGANYINGDIANLUZESHIYIDIANGANYINGJIAREDEGANGUOLU,RONGLIANGUOCHENGDANGRANHUIYOUHENDADEDECHABIE,JISHIRONGLIANDEDAODETIEYEHUAXUECHENGFENXIANGJIN,QIZAININGGUGUOCHENGZHONGFASHENGGONGJINGZHUANBIANDETIAOJIANQUEYOUHENDADECHAYI,YINER,ZHUJIANDEWEIGUANZUZHIHEMOUXIEXINGNENGYEHUIYOUPODADECHAYI。

金巴黎彩票 ZHELIANGZHONGRONGLIANSHEBEI,BUTONGZHICHUZHUYAOYOUYIXIAJIDIAN。

1、沖天爐內有高溫的過熱區

CHONGTIANLURONGLIANGUOCHENGZHONG,ZAIDIJIAOCENGNEIYANGHUADAIHEHUANYUANDAIZHIJIAN,YOUYIGAOWENGUOREQU,WENDUYIBANDOUZAI1700℃ZUOYOU,GAOWENYUNXINGDECHONGTIANLUHUANHUIGENGGAOYIXIE。

GANYINGDIANLURONGLIANSHI,LUNEIBUCUNZAIZHEYANGDEGUOREQU。

2、鐵液中的硫含量

CHONGTIANLURONGLIANSHI,LULIAOZHONGSHENGTIEDINGSUOZHANDEPEIBIJIAOGAO,SHENGTIEDINGDELIUHANLIANGYIBANDOUGAOYUFEIGANG。ERQIE,LULIAOZAIRONGHUAQURONGRONGHOU,YIXIXIAOYEDIZHUANGTAIXIALUODEGUOCHENGZHONG,LIUJINGLIUHANLIANGJIAOGAODEJIAOTAN,ERZHEJIECHUDEJIEMIANMIANJIDA。YEDIDAODALUGANGHOU,SUOYOUDETIEYEDOUJICUNYUJIAOTANKUAIZHIJIANDEKONGXIZHONG。YINCI,RONGLIANHUIZHUTIESHI,TIEYEZHONGDELIUHANLIANGJIAOGAO,TONGCHANGDOUZAI0.1%ZUOYOU。

金巴黎彩票 WUXINGANYINGDIANLURONGLIANZHUTIESHI,YOUYULULIAOZHONGFEIGANGDUOERSHENGTIEDINGSHAO,PEILIAOZHONGLIUHANLIANGBENLAIJIUDI,ZAIJIAYIRONGLIANGUOCHENGZHONGWANQUANBUYUJIAOTANJIECHU,MEIYOUZIJIAOTANXISHOULIUDEGUOCHENG,RUGUOBUTEYIZAIPEILIAOZHONGJIALIU,ZERONGLIANDEDAODETIEYEZHONGLIUHANLIANGJIAODI,YIBANDOUZAI0.04%YIXIA。

3、鐵液中的氧含量

CHONGTIANLURONGLIANGUOCHENGZHONG,WEIRONGDEJINSHULULIAO、TIEYEYULUQIJIECHUDEJIEMIANDA、SHIJIANCHANG,RONGLIANZHIDEDETIEYEZHONGYANGHANLIANGJIAOGAO,YIBANWEI0.004%~0.006%。

WUXINGANYINGDIANLURONGLIANZHUTIESHI,JINSHULULIAOYULUQIJIECHUDESHIJIANHENDUAN,RONGRONGDETIEYEYULUQIJIECHUDEJIEMIANHENXIAO,TIEYEZHONGDEYANGHANLIANGXIANGDANGDI,YIBANWEI0.002%ZUOYOU,SHENZHIGENGDIYIXIE。

GAOLURONGLIANDEZHUZAOSHENGTIE,YANGHANLIANGBIFEIGANGGAODEDUO。SHAOYONGHUOBUYONGSHENGTIE,DAIZHIYIFEIGANG,YESHIGANYINGDIANLURONGLIANDETIEYEZHONGYANGHANLIANGJIAODIDEZHONGYAOYUANYIN。

4、TIEYEZHONGDEDANHANLIANG

CHONGTIANLURONGLIANGUOCHENGZHONG,SUIRANTIEYEYULUQIJIECHUDESHIJIANCHANG,JIECHUDEJIEMIANDA,DANSHI,YOUYUZHUTIEZHONGDETAN、GUIHANLIANGJIAOGAO,RONGYUTIEYEZHONGDEDANBINGBUHENDUO,HANLIANGYIBANWEI0.004%~0.007%。ZHUTIEZHONGHANYOUSHAOLIANGDEDAN,ZHUJIANZHONGBUZHIYUCHANSHENGQIKONG,QUEYOUCUCHENGZHUGUANGTIDEZUOYONG,YOUZHUYUGAISHANZHUTIEDELIXUEXINGNENG。

WUXINGANYINGDIANLURONGLIANZHUTIESHI,LULIAOZHONGPEIYONGDEFEIGANGLIANGJIAODUO。FEIGANGZHONGDETAN、GUIHANLIANGDOUDI,DANHANLIANGBIZHUTIEZHONGDEGAODEDUO,YINCI,GANYINGDIANLURONGLIANDETIEYEZHONGDANHANLIANGYAOGAOYIXIE。YIBANSHUOLAI,LULIAOZHONGFEIGANGYONGLIANGWEI15%SHI,ZHUTIEZHONGDEDANHANLIANGYUEWEI0.003%~0.005%;FEIGANGYONGLIANGWEI50%SHI,DANHANLIANGKEDA0.008%~0.012%;LULIAOQUANBUWEIFEIGANGSHI,DANHANLIANGKEGAODA0.014%YISHANG。

金巴黎彩票 RUGUOTIEYEZHONGDANHANLIANGZAI0.01%YISHANG,ZHUJIANJIUYIYUYINDANXICHUERCHANSHENGQIKONG。YINCI,YONGGANYINGDIANLURONGLIANSHI,YAOZHUYIFANGZHIYINDANERZHIDEQIKONG。

金巴黎彩票 5、DUITIEYEDEJIAOBANZUOYONG

CHONGTIANLURONGLIANGUOCHENGZHONG,LULIAORONGHUAHOU,ZHIZAIYEDIXIALUODEDUANZANSHIJIANNEIYOUXIERAODONG。TIEYEJINRULUGANGHUOQIANLUHOU,CHUNEIBUYOUQINGWEIDEDUILIUWAI,JIBENSHANGMEIYOUJIAOBANZUOYONG。

感應電爐熔煉過程中,熔融的鐵液內部自始至終都有感應電流的攪拌作用。

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