2000年前后，隨著工程機械企業對材料要求的提高，鋼管生產廠(chang)家(jia)除了新建一批先進的軋管機組外，還逐步加大了熱處理線的投入，以實現材料多狀態的交付，改變了以前只有正火、退火、回火的狀態，這對高強度鋼管的研發也起到了很大的作用。目前具備鋼管調質能力的企業有：天津鋼管、寶鋼、衡陽鋼管、湖北新冶鋼、新興鑄管、鞍鋼等。其中天津鋼管擁有十條熱處理線，寶鋼、衡陽鋼管也都有多條熱處理線，規格范圍覆蓋外徑Φ48～720mm；湖北新冶鋼先后建設了四條熱處理線，規格可覆蓋外徑Φ51～533mm，是熱處理比較好的企業之一。這些生產線的建設，為我國開發更高強度級別的如Q500、Q550、Q620、Q690、Q770、Q890等低合金高強度鋼創造了條件。2018年新修訂的《結構用無縫鋼管》（GB／T 8162-2018）將上述大部分牌號納入標準，從而與國外先進標準EN10210-1、EN10297-1更加接近。至此，高強度工程機械用鋼的牌號、化學成分、力學性能要求等，基本上與國際先進標準接軌。

一、起重機臂(bei)架用無縫鋼管

  履帶(dai)(dai)式(shi)(shi)起(qi)(qi)(qi)重(zhong)機(ji)(ji)(ji)廣(guang)泛應(ying)用(yong)于橋梁、發(fa)電設(she)(she)備(bei)、煉(lian)油設(she)(she)備(bei)、風力發(fa)電機(ji)(ji)(ji)組以及海上工(gong)(gong)(gong)(gong)作平臺(tai)等項目的(de)施工(gong)(gong)(gong)(gong)，是(shi)工(gong)(gong)(gong)(gong)程機(ji)(ji)(ji)械中(zhong)(zhong)技術含量(liang)(liang)高、制造工(gong)(gong)(gong)(gong)藝(yi)復雜(za)、具有獨特性能的(de)起(qi)(qi)(qi)重(zhong)作業機(ji)(ji)(ji)械設(she)(she)備(bei)。自2005年徐工(gong)(gong)(gong)(gong)集(ji)團率先研制成(cheng)功我(wo)(wo)國(guo)第一(yi)臺(tai)300t級履帶(dai)(dai)式(shi)(shi)起(qi)(qi)(qi)重(zhong)機(ji)(ji)(ji)開(kai)始，我(wo)(wo)國(guo)履帶(dai)(dai)式(shi)(shi)起(qi)(qi)(qi)重(zhong)機(ji)(ji)(ji)的(de)發(fa)展迅速向大噸位攀升。在2009年和(he)2010年，徐工(gong)(gong)(gong)(gong)集(ji)團、中(zhong)(zhong)聯(lian)重(zhong)科(ke)、三一(yi)重(zhong)工(gong)(gong)(gong)(gong)和(he)撫順挖掘機(ji)(ji)(ji)制造有限公司(si)連續推出(chu)千噸級履帶(dai)(dai)式(shi)(shi)起(qi)(qi)(qi)重(zhong)機(ji)(ji)(ji)。2011年5月，中(zhong)(zhong)聯(lian)重(zhong)科(ke)和(he)三一(yi)重(zhong)工(gong)(gong)(gong)(gong)又(you)相繼推出(chu)3000t級以上大型履帶(dai)(dai)式(shi)(shi)起(qi)(qi)(qi)重(zhong)機(ji)(ji)(ji)。2013年7月，徐工(gong)(gong)(gong)(gong)4000t級履帶(dai)(dai)式(shi)(shi)起(qi)(qi)(qi)重(zhong)機(ji)(ji)(ji)成(cheng)功啟用(yong)，并將萬華煙臺(tai)工(gong)(gong)(gong)(gong)業園高度為118m、直徑(jing)為14.4m、重(zhong)量(liang)(liang)為1680t的(de)丙烯塔吊裝就(jiu)位，開(kai)啟了中(zhong)(zhong)國(guo)吊裝行業的(de)新征程。

作為履(lv)帶(dai)式起(qi)重(zhong)機重(zhong)要(yao)部(bu)件(jian)的(de)(de)(de)組合臂(bei)架(jia)(jia)，是承載和輸送的(de)(de)(de)關鍵部(bu)位，臂(bei)架(jia)(jia)一般是由(you)長度(du)11m左(zuo)右的(de)(de)(de)無縫鋼(gang)管(guan)(guan)(guan)(guan)作為主(zhu)(zhu)弦(xian)臂(bei)管(guan)(guan)(guan)(guan)與腹臂(bei)管(guan)(guan)(guan)(guan)焊(han)(han)接(jie)組合而成(cheng)。對于400t以上(shang)大(da)型履(lv)帶(dai)式起(qi)重(zhong)機的(de)(de)(de)臂(bei)架(jia)(jia)，主(zhu)(zhu)弦(xian)管(guan)(guan)(guan)(guan)所使(shi)用(yong)的(de)(de)(de)鋼(gang)管(guan)(guan)(guan)(guan)外徑更(geng)(geng)大(da)、壁厚更(geng)(geng)厚、強(qiang)度(du)更(geng)(geng)高，要(yao)求鋼(gang)管(guan)(guan)(guan)(guan)不僅具有更(geng)(geng)高的(de)(de)(de)強(qiang)度(du)和韌性，同時由(you)于履(lv)帶(dai)式起(qi)重(zhong)機臂(bei)架(jia)(jia)全部(bu)由(you)鋼(gang)管(guan)(guan)(guan)(guan)焊(han)(han)接(jie)而成(cheng)，因此(ci)還要(yao)求鋼(gang)管(guan)(guan)(guan)(guan)具有良好的(de)(de)(de)焊(han)(han)接(jie)性能。國內主(zhu)(zhu)要(yao)使(shi)用(yong)的(de)(de)(de)770MPa和890MPa級高強(qiang)鋼(gang)管(guan)(guan)(guan)(guan)，衡陽(yang)鋼(gang)管(guan)(guan)(guan)(guan)、天津鋼(gang)管(guan)(guan)(guan)(guan)、新冶(ye)鋼(gang)、寶鋼(gang)、鞍鋼(gang)的(de)(de)(de)產品已完全替代進口。天津鋼(gang)管(guan)(guan)(guan)(guan)已成(cheng)功供貨(huo)屈服強(qiang)度(du)960MPa級別(bie)臂(bei)架(jia)(jia)管(guan)(guan)(guan)(guan)。

二、旋挖機鉆桿(gan)用無縫鋼管

  旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)機(ji)是(shi)一種適合建(jian)筑基(ji)礎工(gong)程中(zhong)成(cheng)(cheng)(cheng)孔作業的(de)(de)(de)(de)施(shi)工(gong)機(ji)械。旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)是(shi)用(yong)(yong)在(zai)旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)機(ji)與施(shi)工(gong)用(yong)(yong)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭之間(jian)(jian)，傳遞扭矩、軸向壓力等載荷，沿共同軸心(xin)、逐節(jie)伸(shen)縮(suo)的(de)(de)(de)(de)管(guan)(guan)狀結構(gou)。旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)由(you)三到(dao)六根(gen)無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)經機(ji)加(jia)工(gong)、焊接后套裝而成(cheng)(cheng)(cheng)。其中(zhong)，每根(gen)無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)構(gou)成(cheng)(cheng)(cheng)一節(jie)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)套筒(tong)(tong)，每節(jie)鋼(gang)(gang)(gang)(gang)管(guan)(guan)的(de)(de)(de)(de)長(chang)(chang)度(du)通常(chang)(chang)約(yue)10m左(zuo)右，直徑Φ159～630mm，壁(bi)厚8～45mm；每節(jie)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)套筒(tong)(tong)的(de)(de)(de)(de)外圓按120度(du)均布焊接厚度(du)x寬度(du)約(yue)為20mmx50mm的(de)(de)(de)(de)通長(chang)(chang)外鍵(jian)，每節(jie)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)套筒(tong)(tong)下端(duan)內(nei)(nei)弧面上焊接了(le)(le)同樣厚度(du)和(he)寬度(du)的(de)(de)(de)(de)內(nei)(nei)鍵(jian)（長(chang)(chang)約(yue)500～900mm）。為保證旋(xuan)(xuan)挖(wa)(wa)(wa)機(ji)正常(chang)(chang)工(gong)作，要(yao)求盡量縮(suo)小相鄰(lin)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)套筒(tong)(tong)間(jian)(jian)的(de)(de)(de)(de)空隙，同時還要(yao)保證各節(jie)套筒(tong)(tong)能夠(gou)自由(you)伸(shen)縮(suo)，這對套筒(tong)(tong)用(yong)(yong)無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)的(de)(de)(de)(de)尺寸偏(pian)差及(ji)形狀精度(du)提出了(le)(le)特殊(shu)要(yao)求。旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)采用(yong)(yong)無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)加(jia)工(gong)制造(zao)，由(you)于(yu)對鋼(gang)(gang)(gang)(gang)管(guan)(guan)質量要(yao)求嚴、技術含量高，過去(qu)主要(yao)依靠從國(guo)(guo)外進口(kou)(kou)，目(mu)前國(guo)(guo)內(nei)(nei)生產(chan)(chan)旋(xuan)(xuan)挖(wa)(wa)(wa)機(ji)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)用(yong)(yong)無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)的(de)(de)(de)(de)企業有幾(ji)十(shi)家，國(guo)(guo)產(chan)(chan)品牌鋼(gang)(gang)(gang)(gang)管(guan)(guan)已完全取代進口(kou)(kou)鋼(gang)(gang)(gang)(gang)管(guan)(guan)。國(guo)(guo)內(nei)(nei)鋼(gang)(gang)(gang)(gang)管(guan)(guan)制造(zao)企業和(he)旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)生產(chan)(chan)企業積累了(le)(le)豐富的(de)(de)(de)(de)經驗，現已形成(cheng)(cheng)(cheng)完善的(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)管(guan)(guan)制造(zao)技術標(biao)準和(he)鋼(gang)(gang)(gang)(gang)管(guan)(guan)批(pi)量供貨能力，攀成(cheng)(cheng)(cheng)鋼(gang)(gang)(gang)(gang)牽頭起草的(de)(de)(de)(de)《旋(xuan)(xuan)挖(wa)(wa)(wa)機(ji)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)用(yong)(yong)無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)》（GB／T 34109--2017）國(guo)(guo)家標(biao)準已實施(shi)，衡(heng)陽鋼(gang)(gang)(gang)(gang)管(guan)(guan)和(he)天(tian)津(jin)鋼(gang)(gang)(gang)(gang)管(guan)(guan)為北京三一智造(zao)科(ke)技有限(xian)公司(si)開發的(de)(de)(de)(de)SY550和(he)SY850旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)專用(yong)(yong)無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)，突破了(le)(le)目(mu)前旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)用(yong)(yong)無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)采購(gou)技術要(yao)求，將新材料應(ying)用(yong)(yong)在(zai)其第五代旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)上，將旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)的(de)(de)(de)(de)使(shi)用(yong)(yong)壽(shou)命由(you)2000h提升到(dao)3000h以上，助(zhu)推中(zhong)國(guo)(guo)的(de)(de)(de)(de)旋(xuan)(xuan)挖(wa)(wa)(wa)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)(gan)產(chan)(chan)品走在(zai)世界前列。