江陰球(qiu)形(xing)(xing)封頭(tou)(tou)鍛件(jian)制(zhi)(zhi)造(zao)工藝(yi)流程(cheng)包(bao)括冶(ye)煉(lian)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)、鍛造(zao)、粗(cu)加工、化(hua)學(xue)成(cheng)分和力學(xue)性能(neng)檢測、無損探傷和精加工至成(cheng)品等，主要(yao)制(zhi)(zhi)造(zao)工藝(yi)如(ru)下所述。鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)冶(ye)煉(lian)拉(la)深(shen)(shen)成(cheng)形(xing)(xing)球(qiu)形(xing)(xing)封頭(tou)(tou)所用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)型為(wei)340t，一(yi)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)制(zhi)(zhi)造(zao)兩件(jian)球(qiu)形(xing)(xing)封頭(tou)(tou)；回轉成(cheng)形(xing)(xing)球(qiu)形(xing)(xing)封頭(tou)(tou)所用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)型為(wei)180t，一(yi)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)制(zhi)(zhi)造(zao)一(yi)件(jian)球(qiu)形(xing)(xing)封頭(tou)(tou)。兩種方(fang)法采用(yong)(yong)(yong)的(de)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)均為(wei)電弧爐粗(cu)煉(lian)鋼(gang)(gang)(gang)(gang)水，鋼(gang)(gang)(gang)(gang)包(bao)爐精煉(lian)，真空澆注制(zhi)(zhi)得。通過(guo)(guo)這(zhe)種雙真空處(chu)理的(de)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)可(ke)以(yi)有效(xiao)去除(chu)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)中(zhong)(zhong)的(de)P、S及(ji)其(qi)他雜質元(yuan)素(su)，鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)質量及(ji)其(qi)熱加工性可(ke)以(yi)得到保證(zheng)。但一(yi)般來說，在鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)制(zhi)(zhi)造(zao)中(zhong)(zhong)，隨(sui)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)型增大，鋼(gang)(gang)(gang)(gang)水量增加，制(zhi)(zhi)造(zao)過(guo)(guo)程(cheng)中(zhong)(zhong)對夾雜物、偏析、疏松縮孔等缺(que)陷的(de)控制(zhi)(zhi)難度越大，不(bu)同(tong)等級的(de)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)存(cun)在不(bu)同(tong)的(de)制(zhi)(zhi)造(zao)難度。鍛造(zao)拉(la)深(shen)(shen)成(cheng)形(xing)(xing)法。拉(la)深(shen)(shen)成(cheng)形(xing)(xing)法鍛造(zao)工藝(yi)過(guo)(guo)程(cheng)，先經(jing)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)制(zhi)(zhi)坯并(bing)下料。然(ran)后通過(guo)(guo)鐓粗(cu)、拔長、輾(zhan)平得到板(ban)(ban)坯，通過(guo)(guo)拉(la)深(shen)(shen)板(ban)(ban)坯得兩件(jian)球(qiu)形(xing)(xing)封頭(tou)(tou)鍛件(jian)毛(mao)坯。鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)(ding)(ding)(ding)利用(yong)(yong)(yong)率59%，水口(kou)切(qie)除(chu)7%，冒口(kou)切(qie)除(chu)20%，總鍛造(zao)比14。
