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、起重機臂架(jia)用無縫鋼管

  履帶(dai)式起重(zhong)(zhong)(zhong)(zhong)機(ji)廣泛應用(yong)于橋梁、發(fa)電設備、煉油設備、風力(li)發(fa)電機(ji)組以(yi)及海上工(gong)(gong)作平臺(tai)等(deng)項目(mu)的(de)施工(gong)(gong)，是工(gong)(gong)程機(ji)械中(zhong)技術(shu)含量(liang)高、制造工(gong)(gong)藝復(fu)雜、具有獨特性能的(de)起重(zhong)(zhong)(zhong)(zhong)作業機(ji)械設備。自2005年(nian)徐(xu)工(gong)(gong)集(ji)團率(lv)先研制成功我國第一(yi)臺(tai)300t級(ji)履帶(dai)式起重(zhong)(zhong)(zhong)(zhong)機(ji)開始，我國履帶(dai)式起重(zhong)(zhong)(zhong)(zhong)機(ji)的(de)發(fa)展迅速向(xiang)大噸位(wei)攀升(sheng)。在2009年(nian)和2010年(nian)，徐(xu)工(gong)(gong)集(ji)團、中(zhong)聯重(zhong)(zhong)(zhong)(zhong)科、三一(yi)重(zhong)(zhong)(zhong)(zhong)工(gong)(gong)和撫順挖(wa)掘機(ji)制造有限公司連(lian)續推(tui)(tui)出(chu)千噸級(ji)履帶(dai)式起重(zhong)(zhong)(zhong)(zhong)機(ji)。2011年(nian)5月(yue)，中(zhong)聯重(zhong)(zhong)(zhong)(zhong)科和三一(yi)重(zhong)(zhong)(zhong)(zhong)工(gong)(gong)又相繼推(tui)(tui)出(chu)3000t級(ji)以(yi)上大型履帶(dai)式起重(zhong)(zhong)(zhong)(zhong)機(ji)。2013年(nian)7月(yue)，徐(xu)工(gong)(gong)4000t級(ji)履帶(dai)式起重(zhong)(zhong)(zhong)(zhong)機(ji)成功啟(qi)用(yong)，并(bing)將萬華煙臺(tai)工(gong)(gong)業園(yuan)高度為(wei)118m、直徑為(wei)14.4m、重(zhong)(zhong)(zhong)(zhong)量(liang)為(wei)1680t的(de)丙烯(xi)塔(ta)吊裝就位(wei)，開啟(qi)了中(zhong)國吊裝行業的(de)新(xin)征程。

作為(wei)履(lv)帶式(shi)起重(zhong)機重(zhong)要部(bu)件(jian)的(de)(de)(de)組合臂(bei)(bei)架(jia)(jia)(jia)，是承(cheng)載(zai)和輸送的(de)(de)(de)關鍵(jian)部(bu)位，臂(bei)(bei)架(jia)(jia)(jia)一(yi)般(ban)是由(you)長度(du)11m左右(you)的(de)(de)(de)無縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)作為(wei)主(zhu)弦(xian)臂(bei)(bei)管(guan)(guan)(guan)(guan)(guan)與腹(fu)臂(bei)(bei)管(guan)(guan)(guan)(guan)(guan)焊(han)(han)接組合而(er)(er)成(cheng)(cheng)。對于(yu)400t以上大(da)型履(lv)帶式(shi)起重(zhong)機的(de)(de)(de)臂(bei)(bei)架(jia)(jia)(jia)，主(zhu)弦(xian)管(guan)(guan)(guan)(guan)(guan)所使用(yong)(yong)的(de)(de)(de)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)外徑更(geng)大(da)、壁厚更(geng)厚、強度(du)更(geng)高，要求鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)不(bu)僅具(ju)有(you)更(geng)高的(de)(de)(de)強度(du)和韌性，同(tong)時(shi)由(you)于(yu)履(lv)帶式(shi)起重(zhong)機臂(bei)(bei)架(jia)(jia)(jia)全部(bu)由(you)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)焊(han)(han)接而(er)(er)成(cheng)(cheng)，因此還(huan)要求鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)具(ju)有(you)良好的(de)(de)(de)焊(han)(han)接性能。國內主(zhu)要使用(yong)(yong)的(de)(de)(de)770MPa和890MPa級(ji)高強鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)，衡陽鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、天(tian)津鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、新(xin)冶鋼(gang)(gang)(gang)(gang)、寶鋼(gang)(gang)(gang)(gang)、鞍鋼(gang)(gang)(gang)(gang)的(de)(de)(de)產(chan)品已(yi)完全替(ti)代進口。天(tian)津鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)已(yi)成(cheng)(cheng)功供貨(huo)屈服強度(du)960MPa級(ji)別臂(bei)(bei)架(jia)(jia)(jia)管(guan)(guan)(guan)(guan)(guan)。

二(er)、旋挖機鉆桿(gan)用無縫鋼管

  旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)機(ji)是一種適合建筑(zhu)基礎(chu)工程中成(cheng)孔作(zuo)業(ye)的(de)(de)(de)施(shi)(shi)工機(ji)械。旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)桿(gan)(gan)是用(yong)(yong)在旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)機(ji)與施(shi)(shi)工用(yong)(yong)鉆(zhan)(zhan)頭之間，傳遞扭(niu)矩(ju)、軸(zhou)向壓力等載荷(he)，沿共同軸(zhou)心、逐節(jie)伸(shen)縮(suo)的(de)(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)狀結(jie)構(gou)。旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)桿(gan)(gan)由三(san)到六根(gen)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)經(jing)機(ji)加工、焊接(jie)后套(tao)(tao)(tao)裝而成(cheng)。其中，每根(gen)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)構(gou)成(cheng)一節(jie)鉆(zhan)(zhan)桿(gan)(gan)套(tao)(tao)(tao)筒(tong)，每節(jie)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)長(chang)度(du)通常約10m左右(you)，直徑(jing)Φ159～630mm，壁厚8～45mm；每節(jie)鉆(zhan)(zhan)桿(gan)(gan)套(tao)(tao)(tao)筒(tong)的(de)(de)(de)外(wai)圓按120度(du)均布焊接(jie)厚度(du)x寬度(du)約為20mmx50mm的(de)(de)(de)通長(chang)外(wai)鍵(jian)，每節(jie)鉆(zhan)(zhan)桿(gan)(gan)套(tao)(tao)(tao)筒(tong)下端(duan)內(nei)弧面上(shang)(shang)焊接(jie)了同樣厚度(du)和(he)寬度(du)的(de)(de)(de)內(nei)鍵(jian)（長(chang)約500～900mm）。為保(bao)證旋(xuan)(xuan)(xuan)(xuan)挖(wa)機(ji)正常工作(zuo)，要(yao)(yao)求(qiu)盡量縮(suo)小相鄰鉆(zhan)(zhan)桿(gan)(gan)套(tao)(tao)(tao)筒(tong)間的(de)(de)(de)空隙，同時還要(yao)(yao)保(bao)證各節(jie)套(tao)(tao)(tao)筒(tong)能夠自由伸(shen)縮(suo)，這(zhe)對套(tao)(tao)(tao)筒(tong)用(yong)(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)尺寸偏(pian)差及形(xing)狀精(jing)度(du)提出了特殊要(yao)(yao)求(qiu)。旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)桿(gan)(gan)采(cai)用(yong)(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)加工制造(zao)，由于(yu)對鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)質量要(yao)(yao)求(qiu)嚴(yan)、技(ji)(ji)術(shu)含量高，過去主要(yao)(yao)依(yi)靠從國(guo)外(wai)進口(kou)，目前(qian)國(guo)內(nei)生(sheng)(sheng)產旋(xuan)(xuan)(xuan)(xuan)挖(wa)機(ji)鉆(zhan)(zhan)桿(gan)(gan)用(yong)(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)企業(ye)有幾十家(jia)，國(guo)產品(pin)牌鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)已完(wan)全取代(dai)進口(kou)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)。國(guo)內(nei)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)制造(zao)企業(ye)和(he)旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)鉆(zhan)(zhan)桿(gan)(gan)生(sheng)(sheng)產企業(ye)積(ji)累了豐富的(de)(de)(de)經(jing)驗，現已形(xing)成(cheng)完(wan)善的(de)(de)(de)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)制造(zao)技(ji)(ji)術(shu)標(biao)準(zhun)和(he)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)批(pi)量供(gong)貨(huo)能力，攀成(cheng)鋼(gang)(gang)牽頭起草的(de)(de)(de)《旋(xuan)(xuan)(xuan)(xuan)挖(wa)機(ji)鉆(zhan)(zhan)桿(gan)(gan)用(yong)(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)》（GB／T 34109--2017）國(guo)家(jia)標(biao)準(zhun)已實施(shi)(shi)，衡(heng)陽鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)和(he)天津鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)為北京三(san)一智(zhi)造(zao)科(ke)技(ji)(ji)有限公司開發的(de)(de)(de)SY550和(he)SY850旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)桿(gan)(gan)專用(yong)(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)，突(tu)破了目前(qian)旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)桿(gan)(gan)用(yong)(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)采(cai)購技(ji)(ji)術(shu)要(yao)(yao)求(qiu)，將(jiang)新材料應用(yong)(yong)在其第(di)五代(dai)旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)桿(gan)(gan)上(shang)(shang)，將(jiang)旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)桿(gan)(gan)的(de)(de)(de)使(shi)用(yong)(yong)壽(shou)命由2000h提升到3000h以上(shang)(shang)，助推中國(guo)的(de)(de)(de)旋(xuan)(xuan)(xuan)(xuan)挖(wa)鉆(zhan)(zhan)桿(gan)(gan)產品(pin)走在世界前(qian)列。