滾軋法(fa):一(yi)(yi)般不(bu)用芯軸,適合于厚壁管(guan)內側圓(yuan)緣。彎曲(qu)成形法(fa):有三(san)種(zhong)(zhong)方法(fa)較(jiao)為常(chang)用,一(yi)(yi)種(zhong)(zhong)方法(fa)叫伸展法(fa),另(ling)一(yi)(yi)種(zhong)(zhong)方法(fa)叫沖(chong)壓(ya)法(fa),第三(san)種(zhong)(zhong)是大(da)家較(jiao)為熟悉的(de)滾輪法(fa),有3-4個輥,兩(liang)個固定輥,一(yi)(yi)個調(diao)整(zheng)輥,調(diao)整(zheng)固定輥距,40Cr無縫鋼(gang)管(guan)就是彎曲(qu)的(de)。這種(zhong)(zhong)方法(fa)應用的(de)較(jiao)廣,若生產(chan)螺(luo)旋管(guan),曲(qu)率還可(ke)增大(da)。沖(chong)壓(ya)法(fa):在沖(chong)床(chuang)上用帶錐度的(de)芯子(zi)將(jiang)管(guan)端擴到(dao)要求的(de)尺寸(cun)和形狀。

軸承鋼(gang)的(de)物理性(xing)能主要以檢查(cha)顯(xian)微組織(zhi)(zhi)、脫碳層、非金屬夾雜(za)物、低倍(bei)組織(zhi)(zhi)為(wei)主。一(yi)般情(qing)況(kuang)下(xia)均以熱軋退火、冷拉退火交(jiao)貨(huo)(huo)(huo)(huo)(huo)。交(jiao)貨(huo)(huo)(huo)(huo)(huo)狀態應在(zai)合同中注(zhu)明(ming)。鋼(gang)材的(de)低倍(bei)組織(zhi)(zhi)必須無(wu)縮孔、皮下(xia)氣泡、白點(dian)及顯(xian)微孔隙(xi)。中心疏(shu)松、一(yi)般疏(shu)松不(bu)得超過1.5級，偏析不(bu)得超過2級。軸承鋼(gang)管廠(chang)(chang)(chang)家的(de)退火組織(zhi)(zhi)應為(wei)均勻分布的(de)細(xi)粒(li)狀珠(zhu)光體。脫碳層深度、非金屬夾雜(za)物和(he)碳化物不(bu)均勻度應符合相應有關國家標準規定(ding)(ding)。一(yi)般情(qing)況(kuang)下(xia)，直徑小于20mm要打包(bao)交(jiao)貨(huo)(huo)(huo)(huo)(huo)，大于20mm時可以裸裝(zhuang)交(jiao)貨(huo)(huo)(huo)(huo)(huo)。具體打包(bao)要求，視雙(shuang)方簽訂的(de)合同要求而定(ding)(ding)，如，六角包(bao)，長短差(cha)，出口(kou)的(de)一(yi)般要加外包(bao)裝(zhuang)等。軸承鋼(gang)管廠(chang)(chang)(chang)家對冷拔(ba) 鋼(gang)應涂防(fang)(fang)銹油(you)，國內某些廠(chang)(chang)(chang)家急需貨(huo)(huo)(huo)(huo)(huo)物的(de)，可以不(bu)防(fang)(fang)銹，不(bu)然其在(zai)加工成套圈(quan)時還要做(zuo)除(chu)油(you)處理。貨(huo)(huo)(huo)(huo)(huo)物出廠(chang)(chang)(chang)前應附質量保證書、注(zhu)明(ming)鋼(gang)號、爐號、重(zhong)量、規格、化學成分、檢驗(yan)標準及檢驗(yan)結果等。

GCr15軸承鋼管是一種合金含量較少、具有良好性能、應用廣泛的高碳鉻軸承鋼。經過淬火加低溫回火后具有較高的硬度、均勻的組織、良好的耐磨性、高的接觸疲勞性能。該鋼冷加工塑性中等，切削性能一般，焊接性能差，對形成白點敏感性能大，有回火脆性。定做冷拔鋼管GCr15軸承鋼管是一種常用的高碳鉻軸承鋼，具有較高的淬透性，熱處理后可獲得高而均勻的硬度。耐磨性優于GCr9，接觸疲勞強度高，有良好的尺寸穩定性和抗蝕性，冷變形塑性中等，切削性一般，焊接性差，對白點形成敏感，有一類回火脆性。冷拔鋼管哪家好在滾珠軸承制造中，用以軋制壁厚12mm.外徑<250mm的H級至C級的軸承套，直徑25.4-50.8mm的鋼球;直徑<22mm的滾子，此外也可用作承受大負荷.要求高耐磨性.高彈性極限.高接觸疲勞強度的其他機械零件及各種精密量具冷沖模等。如機床的滾珠絲桿，渦輪噴氣發動機噴嘴的噴口.柱塞.活門.襯套等。

gcr15無縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分(fen)類、用(yong)(yong)途。由整塊金屬(shu)制成的，無縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)表面(mian)上沒有(you)接縫(feng)(feng)(feng)的鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，稱(cheng)為無縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。根據生產方法，無縫(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分(fen)熱軋管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、冷軋管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、冷拔管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、擠壓管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、頂(ding)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等。按(an)照斷面(mian)形(xing)(xing)狀，無縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分(fen)圓形(xing)(xing)和(he)異(yi)形(xing)(xing)兩種，異(yi)形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)有(you)方形(xing)(xing)、橢圓形(xing)(xing)、三(san)角(jiao)(jiao)形(xing)(xing)、六角(jiao)(jiao)形(xing)(xing)、瓜子(zi)形(xing)(xing)、星形(xing)(xing)、 帶(dai)翅管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)多種復雜(za)形(xing)(xing)狀。最 大直徑達(da)650mm，最小直徑為 0.3mm。根據用(yong)(yong)途不同， 有(you)厚(hou)壁(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)薄壁(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。gcr15無縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)主(zhu)要用(yong)(yong)做石油(you)地質鉆探管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石油(you)化工用(yong)(yong)的裂(lie)化管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、鍋 爐(lu)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、軸承管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)以及汽車、拖拉(la)機、航空用(yong)(yong)高精(jing)度結構鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。