六角鋼管具備抗壓強度高、切削性能好、延展性好、熱處理形變小、高溫應力松弛抗壓強度和長久抗壓強度高等學校特性。用以生產制造比35CrMo六角鋼管抗壓(ya)(ya)強度更(geng)高、熱處理(li)橫斷(duan)面(mian)更(geng)大的鑄鋼件，如電力機車(che)牽引帶用(yong)大齒輪、增壓(ya)(ya)機齒輪軸(zhou)、高壓(ya)(ya)容器(qi)傳動齒輪、汽車(che)后橋、曲軸(zhou)、彈黃管箍(gu)等。荷載大，可用(yong)以2000米下列(lie)深水(shui)井的鉆具(ju)連接頭和打撈工具(ju)與折彎模具(ju)等。

　　六角鋼管

　　六(liu)(liu)角鋼管(guan)淬(cui)火延(yan)(yan)性(xing)(xing)(xing)(xing)精密光亮管(guan)熱處理獲得奧氏體(ti)機構后(hou)，在(zai)450～600℃溫(wen)(wen)度(du)范(fan)疇淬(cui)火;或在(zai)650℃淬(cui)火后(hou)以遲緩制(zhi)冷速率(lv)歷(li)經(jing)350～600℃;或是在(zai)650℃淬(cui)火后(hou)，16Mn六(liu)(liu)角鋼管(guan)16Mn無縫管(guan)在(zai)350～650℃溫(wen)(wen)度(du)范(fan)疇長期性(xing)(xing)(xing)(xing)加溫(wen)(wen)，都使精密光亮管(guan)造成脆裂(lie)(lie)狀況(kuang)假如(ru)早已脆裂(lie)(lie)的(de)20#精密鋼管(guan)再次加溫(wen)(wen)到650℃隨(sui)后(hou)快(kuai)冷，能夠修復延(yan)(yan)展性(xing)(xing)(xing)(xing)，因而又稱之(zhi)為可逆性(xing)(xing)(xing)(xing)淬(cui)火延(yan)(yan)性(xing)(xing)(xing)(xing);高溫(wen)(wen)淬(cui)火延(yan)(yan)性(xing)(xing)(xing)(xing)主要表(biao)現為精密光亮管(guan)的(de)延(yan)(yan)展性(xing)(xing)(xing)(xing)一延(yan)(yan)性(xing)(xing)(xing)(xing)轉(zhuan)換溫(wen)(wen)度(du)的(de)上升(sheng)。高溫(wen)(wen)淬(cui)火延(yan)(yan)性(xing)(xing)(xing)(xing)。敏感性(xing)(xing)(xing)(xing)一般(ban)用韌化情況(kuang)和脆裂(lie)(lie)情況(kuang)的(de)延(yan)(yan)展性(xing)(xing)(xing)(xing)一延(yan)(yan)性(xing)(xing)(xing)(xing)轉(zhuan)換溫(wen)(wen)度(du)之(zhi)差來表(biao)達。

　　六角鋼(gang)管中原素對高溫淬火延性的功效分為：

　　(1)引起精密光亮管的高溫(wen)淬火延(yan)性(xing)的殘渣原素如磷、錫(xi)、銻(ti)等。

　　(2)以不一樣(yang)方式(shi)、不一樣(yang)水(shui)平推動或緩解高溫淬(cui)火(huo)(huo)延(yan)性(xing)的鋁合(he)金原素。有(you)鉻、錳(meng)、鎳(nie)(nie)、硅(gui)等起(qi)積極(ji)意(yi)義，而(er)鉬(mu)、鎢、鈦等起(qi)減緩功效(xiao)。碳(tan)也起(qi)著積極(ji)意(yi)義。一般炭素精密光(guang)亮管對高溫淬(cui)火(huo)(huo)延(yan)性(xing)不。比(bi)較敏感(gan)，帶有(you)鉻、錳(meng)、鎳(nie)(nie)、硅(gui)的二元或多元化鋁合(he)金。

　　六(liu)角鋼管是(shi)鎳(nie)鐵(tie)(tie)鉻系耐熱(re)(re)(re)(re)合金，根據(ju)加上一定(ding)量的(de)(de)(de)硅原素使(shi)其具(ju)(ju)備不錯(cuo)(cuo)的(de)(de)(de)高(gao)溫(wen)(wen)抗壓強度(du)。因(yin)為(wei)六(liu)角鋼管具(ju)(ju)備較高(gao)的(de)(de)(de)高(gao)溫(wen)(wen)抗壓強度(du)，出(chu)色的(de)(de)(de)抗高(gao)溫(wen)(wen)空氣氧化(hua)(hua)工(gong)(gong)(gong)作(zuo)能(neng)力及抗物(wu)質浸蝕工(gong)(gong)(gong)作(zuo)能(neng)力，在(zai)航(hang)空航(hang)天+石(shi)油化(hua)(hua)工(gong)(gong)(gong)設備及有機化(hua)(hua)學鋼鐵(tie)(tie)工(gong)(gong)(gong)業行業獲得愈來(lai)愈普遍的(de)(de)(de)運用(yong)(yong)(yong)。因(yin)為(wei)煤干餾加工(gong)(gong)(gong)工(gong)(gong)(gong)藝選用(yong)(yong)(yong)高(gao)溫(wen)(wen)液化(hua)(hua)氣對(dui)高(gao)階煤開展超低溫(wen)(wen)熱(re)(re)(re)(re)裂(lie)解(jie)，選用(yong)(yong)(yong)液化(hua)(hua)氣熱(re)(re)(re)(re)處(chu)理爐(lu)對(dui)液化(hua)(hua)氣開展加溫(wen)(wen)后進到爐(lu)墻干餾段對(dui)煤開展熱(re)(re)(re)(re)裂(lie)解(jie)，液化(hua)(hua)氣中帶有水蒸汽(qi)、小量H2S等具(ju)(ju)備腐蝕汽(qi)體，故規定(ding)制做(zuo)熱(re)(re)(re)(re)處(chu)理爐(lu)的(de)(de)(de)原材料具(ju)(ju)有不錯(cuo)(cuo)的(de)(de)(de)耐熱(re)(re)(re)(re)腐蝕能(neng)。