軸(zhou)承鋼(gang)是特殊鋼(gang)中最具(ju)代(dai)表(biao)性的(de)鋼(gang)種,其服役條(tiao)件惡劣(lie),使(shi)用性能要(yao)(yao)求(qiu)較高,是生產(chan)難度(du)最大(da)、質量(liang)要(yao)(yao)求(qiu)最嚴、檢(jian)驗項(xiang)目最多的(de)鋼(gang)種之一。國際鋼(gang)鐵界(jie)通常把軸(zhou)承鋼(gang)的(de)質量(liang)水(shui)平視為鋼(gang)鐵企業特殊鋼(gang)生產(chan)技術水(shui)平和產(chan)品質量(liang)水(shui)平的(de)重要(yao)(yao)標志。


  軸(zhou)(zhou)承(cheng)(cheng)管主要用于制造滾動軸(zhou)(zhou)承(cheng)(cheng)的(de)(de)(de)內外套圈。由于滾動軸(zhou)(zhou)承(cheng)(cheng)工(gong)(gong)作時負荷集中,因此要求軸(zhou)(zhou)承(cheng)(cheng)套圈在(zai)工(gong)(gong)作時能抗壓、耐(nai)磨損、耐(nai)腐蝕(shi)和有較長的(de)(de)(de)使用壽命(ming)。為(wei)(wei)了達到這些要求,軸(zhou)(zhou)承(cheng)(cheng)用鋼(gang)應具(ju)有高(gao)而均(jun)勻的(de)(de)(de)硬度(du)(du)和耐(nai)磨性(xing),高(gao)的(de)(de)(de)彈性(xing)極(ji)限和接觸(chu)疲勞強度(du)(du),一定(ding)的(de)(de)(de)韌性(xing)和淬透性(xing)及(ji)耐(nai)蝕(shi)性(xing)。從而對鋼(gang)的(de)(de)(de)純凈度(du)(du)、氣體含量(氧(yang)氮含量)、非金屬夾(jia)雜(za)(數量、形態、種類)及(ji)碳(tan)化物數量形態分(fen)(fen)布、成(cheng)分(fen)(fen)、組(zu)織的(de)(de)(de)均(jun)勻性(xing)及(ji)鋼(gang)材(cai)(cai)表(biao)面的(de)(de)(de)脫碳(tan)層程(cheng)度(du)(du)都有嚴格的(de)(de)(de)要求。由于軸(zhou)(zhou)承(cheng)(cheng)規(gui)格繁多,為(wei)(wei)了減少(shao)加(jia)工(gong)(gong)余(yu)量及(ji)提高(gao)成(cheng)材(cai)(cai)率又對軸(zhou)(zhou)承(cheng)(cheng)鋼(gang)管的(de)(de)(de)規(gui)格及(ji)尺(chi)寸精度(du)(du)提出(chu)更高(gao)要求。


  在國外,著名(ming)的(de)(de)軸承鋼生(sheng)(sheng)產企業(ye)如瑞典SKF、日本山(shan)陽(yang)、美國鐵(tie)姆肯(ken)等均(jun)生(sheng)(sheng)產軸承管(guan)(guan)。其中SKF生(sheng)(sheng)產外徑φ90~200mm熱軋(ya)(ya)管(guan)(guan)及Φ55~110mm冷軋(ya)(ya)管(guan)(guan);日本山(shan)陽(yang)生(sheng)(sheng)產外徑φ50~180mm 熱軋(ya)(ya)管(guan)(guan)和ф22~95mm的(de)(de)冷軋(ya)(ya)管(guan)(guan)。


  我(wo)國(guo)(guo)的(de)軸(zhou)承(cheng)(cheng)(cheng)(cheng)管(guan)主要(yao)(yao)以(yi)中(zhong)小(xiao)口徑為(wei)主,由(you)于(yu)規格繁多(duo)、批量(liang)(liang)小(xiao)等原因(yin),多(duo)由(you)專業(ye)的(de)中(zhong)小(xiao)企(qi)業(ye)采用穿孔(kong)+冷(leng)軋(ya)(ya)(ya)/拔+熱(re)處理工(gong)藝生(sheng)(sheng)產(chan)。全(quan)流程的(de)軸(zhou)承(cheng)(cheng)(cheng)(cheng)鋼(gang)(gang)管(guan)生(sheng)(sheng)產(chan)由(you)于(yu)生(sheng)(sheng)產(chan)環(huan)節多(duo)、生(sheng)(sheng)產(chan)流程長、工(gong)藝涉及面廣(guang),諸如(ru),冶(ye)煉(lian)涉及煉(lian)鐵、煉(lian)鋼(gang)(gang)和(he)連(lian)鑄,軋(ya)(ya)(ya)管(guan)涉及熱(re)軋(ya)(ya)(ya)、控(kong)冷(leng)、酸洗及冷(leng)軋(ya)(ya)(ya),熱(re)處理涉及球化退(tui)火(huo)、光亮退(tui)火(huo)等,其影響質(zhi)量(liang)(liang)的(de)因(yin)素(su)多(duo),質(zhi)量(liang)(liang)控(kong)制難度大。另外該(gai)產(chan)品生(sheng)(sheng)產(chan)周(zhou)期長,能耗高,易對環(huan)境(jing)產(chan)生(sheng)(sheng)污染等,使國(guo)(guo)內(nei)特(te)鋼(gang)(gang)企(qi)業(ye)和(he)全(quan)流程鋼(gang)(gang)管(guan)企(qi)業(ye)很少(shao)涉足。目(mu)前我(wo)國(guo)(guo)軸(zhou)承(cheng)(cheng)(cheng)(cheng)鋼(gang)(gang)(管(guan))產(chan)業(ye)鏈的(de)現狀是:特(te)鋼(gang)(gang)企(qi)業(ye),生(sheng)(sheng)產(chan)軸(zhou)承(cheng)(cheng)(cheng)(cheng)鋼(gang)(gang)坯(棒(bang))銷售(shou)給軸(zhou)承(cheng)(cheng)(cheng)(cheng)企(qi)業(ye),少(shao)部分賣(mai)給軸(zhou)承(cheng)(cheng)(cheng)(cheng)管(guan)企(qi)業(ye)作(zuo)為(wei)坯料;軸(zhou)承(cheng)(cheng)(cheng)(cheng)管(guan)企(qi)業(ye)以(yi)購買軸(zhou)承(cheng)(cheng)(cheng)(cheng)鋼(gang)(gang)(棒(bang))作(zuo)為(wei)原料,采用穿孔(kong)+冷(leng)軋(ya)(ya)(ya)/拔工(gong)藝生(sheng)(sheng)產(chan)軸(zhou)承(cheng)(cheng)(cheng)(cheng)管(guan),兩大工(gong)序(xu)(上(shang)下游)各自獨(du)立(li)(在(zai)生(sheng)(sheng)產(chan)技(ji)術體系上(shang)沒(mei)有緊密的(de)聯系),生(sheng)(sheng)產(chan)中(zhong)型(xing)(xing)、大型(xing)(xing)、特(te)大型(xing)(xing)軸(zhou)承(cheng)(cheng)(cheng)(cheng)企(qi)業(ye),主要(yao)(yao)采用軸(zhou)承(cheng)(cheng)(cheng)(cheng)鋼(gang)(gang)坯(棒(bang));生(sheng)(sheng)產(chan)微型(xing)(xing)、小(xiao)型(xing)(xing)軸(zhou)承(cheng)(cheng)(cheng)(cheng)企(qi)業(ye),采用軸(zhou)承(cheng)(cheng)(cheng)(cheng)管(guan)。


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