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無縫鋼管生產工藝流程
　　無縫(feng)鋼(gang)管(guan)(guan)(guan)生(sheng)產主要經過以(yi)下幾(ji)道工序；管(guan)(guan)(guan)坯——切斷——加(jia)熱——穿孔——軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)——定（減）徑——矯(jiao)直(zhi)——切頭尾——檢驗——包(bao)裝(zhuang)——入(ru)庫。而(er)根據軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)方式(shi)的(de)不同(tong)可將無縫(feng)鋼(gang)管(guan)(guan)(guan)軋(ya)(ya)(ya)(ya)機(ji)(ji)分為自(zi)動軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組、連(lian)(lian)軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組（MPM兩輥連(lian)(lian)軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組、PQF三輥連(lian)(lian)軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組）、Assel軋(ya)(ya)(ya)(ya)輥機(ji)(ji)組、Accu軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組、周期軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組等(deng)，新上的(de)軋(ya)(ya)(ya)(ya)機(ji)(ji)以(yi)MPM連(lian)(lian)軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組、PQF三輥連(lian)(lian)軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組居多，比(bi)如天津鋼(gang)管(guan)(guan)(guan)公司(si)的(de)Φ460、Φ258PQF連(lian)(lian)軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組、衡陽鋼(gang)管(guan)(guan)(guan)的(de)Φ273MPM連(lian)(lian)軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組、攀鋼(gang)成都無縫(feng)的(de)Φ340MPM連(lian)(lian)軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組、Φ159PQM連(lian)(lian)軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組、鞍(an)山Φ170PQF連(lian)(lian)軋(ya)(ya)(ya)(ya)管(guan)(guan)(guan)機(ji)(ji)組等(deng)。

穿孔機
　　管坯(pi)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)是(shi)熱(re)軋(ya)(ya)(ya)(ya)無縫鋼(gang)管生產中^重要的(de)(de)(de)(de)變(bian)形(xing)(xing)(xing)工序，它的(de)(de)(de)(de)任務是(shi)將(jiang)實心管坯(pi)穿(chuan)(chuan)(chuan)軋(ya)(ya)(ya)(ya)成空心毛管。根(gen)據(ju)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)機的(de)(de)(de)(de)結構和(he)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)過(guo)(guo)程的(de)(de)(de)(de)變(bian)形(xing)(xing)(xing)特點，可(ke)將(jiang)現有(you)(you)(you)的(de)(de)(de)(de)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)方法分為(wei)(wei)：斜軋(ya)(ya)(ya)(ya)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)、推(tui)軋(ya)(ya)(ya)(ya)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)和(he)壓(ya)力穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)，而以斜軋(ya)(ya)(ya)(ya)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)應(ying)用(yong)^為(wei)(wei)廣泛，斜軋(ya)(ya)(ya)(ya)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)機軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)的(de)(de)(de)(de)形(xing)(xing)(xing)狀(zhuang)有(you)(you)(you)輥(gun)(gun)(gun)(gun)式、菌(jun)(jun)式（錐(zhui)形(xing)(xing)(xing)）和(he)盤式三種(zhong)，輥(gun)(gun)(gun)(gun)式穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)機軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)應(ying)用(yong)于(yu)小(xiao)型(xing)軋(ya)(ya)(ya)(ya)機，而大(da)型(xing)的(de)(de)(de)(de)機組穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)機采用(yong)菌(jun)(jun)式軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)。盤式穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)機應(ying)用(yong)較(jiao)少(shao)。不論軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)形(xing)(xing)(xing)狀(zhuang)如(ru)何，為(wei)(wei)了保證管坯(pi)咬入(ru)(ru)(ru)和(he)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)過(guo)(guo)程的(de)(de)(de)(de)實現都有(you)(you)(you)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)錐(zhui)（軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)入(ru)(ru)(ru)口(kou)錐(zhui)）、碾軋(ya)(ya)(ya)(ya)錐(zhui)（軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)出口(kou)錐(zhui)）和(he)軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)軋(ya)(ya)(ya)(ya)制帶（入(ru)(ru)(ru)口(kou)錐(zhui)與出口(kou)錐(zhui)之(zhi)間的(de)(de)(de)(de)過(guo)(guo)度部分）組成。 穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)機軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)大(da)多采用(yong)輥(gun)(gun)(gun)(gun)軸和(he)輥(gun)(gun)(gun)(gun)套的(de)(de)(de)(de)組合(he)(he)結構，兩者(zhe)采用(yong)直接過(guo)(guo)盈組合(he)(he)或加(jia)(jia)鍵過(guo)(guo)盈組合(he)(he)。這樣，當軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)報廢后(hou)，輥(gun)(gun)(gun)(gun)軸可(ke)繼續復用(yong)，以減(jian)小(xiao)工具成本。小(xiao)型(xing)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)機輥(gun)(gun)(gun)(gun)軸材質多選用(yong)45或40Cr，調質處(chu)理(li)。大(da)型(xing)的(de)(de)(de)(de)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)機輥(gun)(gun)(gun)(gun)軸多用(yong)42CrMo，調質處(chu)理(li)。軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)材質目前各廠家(jia)選用(yong)較(jiao)雜，有(you)(you)(you)的(de)(de)(de)(de)廠家(jia)選用(yong)鍛造45、55等優質碳素結構鋼(gang)。有(you)(you)(you)的(de)(de)(de)(de)廠家(jia)選用(yong)50Mn、65Mn、70Mn、70Mn2Mo、60CrMnMo等合(he)(he)金鑄(zhu)鋼(gang)或鍛鋼(gang)；硬度范(fan)圍要求也不一(yi)致，有(you)(you)(you)的(de)(de)(de)(de)要求HB180-220，有(you)(you)(you)的(de)(de)(de)(de)要求HB220-260。為(wei)(wei)了增加(jia)(jia)咬入(ru)(ru)(ru)性，大(da)型(xing)穿(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)軋(ya)(ya)(ya)(ya)輥(gun)(gun)(gun)(gun)一(yi)般在入(ru)(ru)(ru)口(kou)錐(zhui)上加(jia)(jia)工有(you)(you)(you)深度為(wei)(wei)0.8～1.2mm的(de)(de)(de)(de)網狀(zhuang)花紋(wen)。