山東億(yi)錦鑄(zhu)(zhu)(zhu)鐵型(xing)(xing)(xing)材有(you)限公司專業提供山東球墨(mo)鑄(zhu)(zhu)(zhu)鐵棒現(xian)(xian)貨(huo)，山東鑄(zhu)(zhu)(zhu)鐵棒生(sheng)(sheng)產(chan)(chan)廠(chang)家由于在(zai)(zai)熔煉中(zhong)加入了一(yi)定量的(de)(de)增S劑，鐵水中(zhong)Mn含量積累達(da)到一(yi)定程(cheng)(cheng)度(du)(du)，就會導(dao)(dao)(dao)致(zhi)鐵水含S量超(chao)出鑄(zhu)(zhu)(zhu)件自身正常凝固結(jie)晶(jing)的(de)(de)要求，從(cong)而產(chan)(chan)生(sheng)(sheng)此類(lei)缺陷(xian)。對(dui)(dui)策：停止加入增S劑，調整(zheng)Mn的(de)(de)含量，保(bao)證(zheng)HT300灰鐵的(de)(de)五元素(su)(su)的(de)(de)正常含量，調整(zheng)后，缺陷(xian)全部(bu)。 鑄(zhu)(zhu)(zhu)鐵型(xing)(xing)(xing)材在(zai)(zai)重工(gong)(gong)業中(zhong)需求量大(da)，被(bei)廣泛應用于交(jiao)通(tong)運輸(shu)、機床、印刷、農業機械等支柱(zhu)行(xing)業。拉(la)坯(pi)(pi)工(gong)(gong)藝參(can)(can)數(shu)設(she)置(zhi)是(shi)(shi)鑄(zhu)(zhu)(zhu)鐵型(xing)(xing)(xing)材生(sheng)(sheng)產(chan)(chan)中(zhong)的(de)(de)關(guan)鍵環(huan)節(jie)，設(she)置(zhi)不合理(li)會導(dao)(dao)(dao)致(zhi)拉(la)漏、拉(la)斷等生(sheng)(sheng)產(chan)(chan)事(shi)故(gu)和產(chan)(chan)生(sheng)(sheng)表面裂紋(wen)等鑄(zhu)(zhu)(zhu)造(zao)缺陷(xian)。現(xian)(xian)有(you)鑄(zhu)(zhu)(zhu)鐵型(xing)(xing)(xing)材生(sheng)(sheng)產(chan)(chan)企業拉(la)坯(pi)(pi)工(gong)(gong)藝參(can)(can)數(shu)控制技(ji)術參(can)(can)差不齊(qi)，尚無(wu)完整(zheng)的(de)(de)理(li)論(lun)體(ti)系(xi)(xi)。對(dui)(dui)鼓肚(du)缺陷(xian)，在(zai)(zai)鑄(zhu)(zhu)(zhu)鐵型(xing)(xing)(xing)材的(de)(de)水平連鑄(zhu)(zhu)(zhu)過(guo)(guo)程(cheng)(cheng)中(zhong)采(cai)用反弧(hu)度(du)(du)法工(gong)(gong)藝，即通(tong)過(guo)(guo)新型(xing)(xing)(xing)的(de)(de)石(shi)(shi)墨(mo)套與引錠裝置(zhi)來實(shi)現(xian)(xian)的(de)(de)，通(tong)過(guo)(guo)實(shi)施反弧(hu)度(du)(du)法工(gong)(gong)藝，鑄(zhu)(zhu)(zhu)鐵型(xing)(xing)(xing)材的(de)(de)鼓肚(du)現(xian)(xian)象(xiang)得到有(you)效。但由于在(zai)(zai)率次實(shi)驗過(guo)(guo)程(cheng)(cheng)中(zhong)，剛開始(shi)生(sheng)(sheng)產(chan)(chan)鑄(zhu)(zhu)(zhu)鐵型(xing)(xing)(xing)材時(shi)的(de)(de)拉(la)拔(ba)速度(du)(du)比較慢、拉(la)拔(ba)周期較長，使鑄(zhu)(zhu)(zhu)鐵型(xing)(xing)(xing)材在(zai)(zai)結(jie)晶(jing)器的(de)(de)停留時(shi)間過(guo)(guo)長，導(dao)(dao)(dao)致(zhi)在(zai)(zai)扁平方向(xiang)上鑄(zhu)(zhu)(zhu)鐵型(xing)(xing)(xing)材頂(ding)部(bu)略微(wei)向(xiang)下凹(ao)，當拉(la)拔(ba)參(can)(can)數(shu)調整(zheng)合適時(shi)，下凹(ao)及鼓肚(du)現(xian)(xian)象(xiang)基本消(xiao)失。鑄(zhu)(zhu)(zhu)鐵材料中(zhong)的(de)(de)化(hua)學(xue)成分對(dui)(dui)其石(shi)(shi)墨(mo)化(hua)有(you)影響，我們知道(dao)在(zai)(zai)鑄(zhu)(zhu)(zhu)鐵中(zhong)含Si、MnP等元素(su)(su)，其中(zhong)碳元素(su)(su)和硅元素(su)(su)可以促進鑄(zhu)(zhu)(zhu)鐵的(de)(de)石(shi)(shi)墨(mo)化(hua)，但是(shi)(shi)硫元素(su)(su)會阻礙鑄(zhu)(zhu)(zhu)鐵型(xing)(xing)(xing)材的(de)(de)石(shi)(shi)墨(mo)化(hua)，其影響力和其在(zai)(zai)鑄(zhu)(zhu)(zhu)鐵中(zhong)的(de)(de)含量有(you)很大(da)的(de)(de)關(guan)系(xi)(xi)，同(tong)時(shi)不同(tong)元素(su)(su)之間可能會產(chan)(chan)生(sheng)(sheng)一(yi)定發(fa)的(de)(de)聯系(xi)(xi)，這都會對(dui)(dui)鑄(zhu)(zhu)(zhu)鐵的(de)(de)石(shi)(shi)墨(mo)化(hua)造(zao)成影響，整(zheng)個過(guo)(guo)程(cheng)(cheng)是(shi)(shi)極(ji)為復雜的(de)(de)。