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熱軋無縫鋼管與冷拔無縫鋼管是什么?有什么特點?這些知識對于我們來講,需要深入了解。今天無縫鋼管廠就來給大家分享一下。
一、熱軋無縫鋼管與冷拔無縫鋼管是什么?
熱軋(擠壓無縫鋼管):
圓管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)→加熱(re)→穿(chuan)孔(kong)→三(san)輥斜軋(ya)(ya)(ya)、連軋(ya)(ya)(ya)或(huo)擠壓→脫管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)→定徑(jing)(或(huo)減徑(jing))→冷卻→矯直(zhi)→水壓試驗(或(huo)探傷(shang))→標記→入庫 無縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是用(yong)鋼(gang)(gang)(gang)錠或(huo)實心管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)經(jing)穿(chuan)孔(kong)制成(cheng)毛管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan),然后經(jing)熱(re)軋(ya)(ya)(ya)、冷軋(ya)(ya)(ya)或(huo)冷撥(bo)制成(cheng)。無縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的規格用(yong)外(wai)徑(jing)*壁(bi)(bi)厚(hou)(hou)毫(hao)米數表示。無縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分熱(re)軋(ya)(ya)(ya)和(he)冷軋(ya)(ya)(ya)(撥(bo))無縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)兩類。 熱(re)軋(ya)(ya)(ya)無縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分一(yi)般(ban)(ban)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan),低(di)、中壓鍋(guo)爐(lu)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan),高(gao)(gao)壓鍋(guo)爐(lu)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合(he)(he)金(jin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不銹鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石(shi)油裂化(hua)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、地質鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)其它(ta)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等。冷軋(ya)(ya)(ya)(撥(bo))無縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)除分一(yi)般(ban)(ban)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、低(di)中壓鍋(guo)爐(lu)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、高(gao)(gao)壓鍋(guo)爐(lu)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合(he)(he)金(jin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不銹鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石(shi)油裂化(hua)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、其它(ta)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai),還(huan)包括碳素薄壁(bi)(bi)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合(he)(he)金(jin)薄壁(bi)(bi)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不銹薄壁(bi)(bi)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、異型(xing)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。熱(re)軋(ya)(ya)(ya)無縫(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)一(yi)般(ban)(ban)大于32mm,壁(bi)(bi)厚(hou)(hou)2.5-75mm,冷軋(ya)(ya)(ya)無縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)處徑(jing)可(ke)(ke)以到(dao)6mm,壁(bi)(bi)厚(hou)(hou)可(ke)(ke)到(dao)0.25mm,薄壁(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)可(ke)(ke)到(dao)5mm壁(bi)(bi)厚(hou)(hou)小于0.25mm,冷軋(ya)(ya)(ya)比熱(re)軋(ya)(ya)(ya)尺(chi)寸精(jing)度(du)高(gao)(gao)。
一(yi)般用(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管是用(yong)10、20、30、35、45等(deng)優(you)質(zhi)碳結(jie)鋼(gang)(gang)(gang)(gang)16Mn、5MnV等(deng)低合(he)金結(jie)構鋼(gang)(gang)(gang)(gang)或40Cr、30CrMnSi、45Mn2、40MnB等(deng)合(he)結(jie)鋼(gang)(gang)(gang)(gang)熱(re)(re)(re)軋(ya)或冷(leng)軋(ya)制(zhi)成(cheng)的。10、20等(deng)低碳鋼(gang)(gang)(gang)(gang)制(zhi)造的無(wu)(wu)縫(feng)管主要(yao)用(yong)于(yu)流體輸送管道。45、40Cr等(deng)中碳鋼(gang)(gang)(gang)(gang)制(zhi)成(cheng)的無(wu)(wu)縫(feng)管用(yong)來(lai)制(zhi)造機(ji)械零件,如(ru)汽車、拖拉機(ji)的受力零件。一(yi)般用(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管要(yao)保證(zheng)強度和壓(ya)扁試驗。熱(re)(re)(re)軋(ya)鋼(gang)(gang)(gang)(gang)管以(yi)熱(re)(re)(re)軋(ya)狀(zhuang)態或熱(re)(re)(re)處(chu)理狀(zhuang)態交(jiao)貨;冷(leng)軋(ya)以(yi)熱(re)(re)(re)以(yi)熱(re)(re)(re)處(chu)理狀(zhuang)態交(jiao)貨。
熱(re)軋(ya)(ya),顧名思義(yi),軋(ya)(ya)件的(de)(de)(de)溫度(du)高,因此變形(xing)抗力小,可(ke)以(yi)實現(xian)(xian)大的(de)(de)(de)變形(xing)量。以(yi)鋼板(ban)的(de)(de)(de)軋(ya)(ya)制為例,一(yi)般(ban)連鑄(zhu)坯厚度(du)在230mm左右,而經過(guo)粗軋(ya)(ya)和精軋(ya)(ya),最終(zhong)厚度(du)為1~20mm。同時,由于鋼板(ban)的(de)(de)(de)寬厚比小,尺寸精度(du)要求相對低(di),不容易出現(xian)(xian)板(ban)形(xing)問題,以(yi)控(kong)(kong)制凸(tu)度(du)為主。對于組織有要求的(de)(de)(de),一(yi)般(ban)通過(guo)控(kong)(kong)軋(ya)(ya)控(kong)(kong)冷(leng)來實現(xian)(xian),即控(kong)(kong)制精軋(ya)(ya)的(de)(de)(de)開軋(ya)(ya)溫度(du)、終(zhong)軋(ya)(ya)溫度(du)
冷拔(軋)無縫鋼管:
圓管(guan)坯→加熱(re)→穿孔→打頭→退火(huo)→酸(suan)洗→涂油(鍍銅)→多(duo)道次冷(leng)拔(冷(leng)軋)→坯管(guan)→熱(re)處(chu)理→矯直(zhi)→水壓試(shi)驗(探(tan)傷)→標記(ji)→入庫(ku)
二、熱軋無縫鋼管與冷拔精密鋼管的特點
熱軋無縫鋼管的特點:
熱(re)軋(ya)(ya)(ya)是(shi)相對于冷軋(ya)(ya)(ya)而言的(de),冷軋(ya)(ya)(ya)是(shi)在(zai)再結晶溫(wen)度(du)以下(xia)進行的(de)軋(ya)(ya)(ya)制(zhi),而熱(re)軋(ya)(ya)(ya)就(jiu)是(shi)在(zai)再結晶溫(wen)度(du)以上進行的(de)軋(ya)(ya)(ya)制(zhi)。熱(re)軋(ya)(ya)(ya)能夠損壞(huai)鋼(gang)錠的(de)鍛造安排,細化鋼(gang)材的(de)晶粒,并消(xiao)除(chu)顯微安排的(de)缺點,從而使(shi)鋼(gang)材安排密實,力(li)學性(xing)(xing)能得到改進。這(zhe)種改進主要體現在(zai)沿(yan)軋(ya)(ya)(ya)制(zhi)方向(xiang)上,從而使(shi)鋼(gang)材在(zai)必定(ding)程度(du)上不再是(shi)各(ge)向(xiang)同性(xing)(xing)體;澆注(zhu)時構(gou)成的(de)氣泡、裂(lie)紋和疏松,也可在(zai)高溫(wen)文壓力(li)效果下(xia)被焊合。
熱(re)軋無縫鋼(gang)(gang)管(guan)(guan)分一般鋼(gang)(gang)管(guan)(guan),低(di)、中壓鍋爐鋼(gang)(gang)管(guan)(guan),高(gao)壓鍋爐鋼(gang)(gang)管(guan)(guan)、合金鋼(gang)(gang)管(guan)(guan)、不銹鋼(gang)(gang)管(guan)(guan)、石油(you)裂化管(guan)(guan)、地質鋼(gang)(gang)管(guan)(guan)和其它(ta)鋼(gang)(gang)管(guan)(guan)等。
冷拔精密鋼管的特點 :
1.外徑更(geng)小(xiao)。
2.精(jing)度高可做(zuo)小批量生(sheng)
3.冷拔(ba)成品精度(du)高,表面質(zhi)量好。
4.鋼管橫面積(ji)更復雜。
5.鋼管性能更優越,金屬比較密(mi)。
熱軋精密鋼管后的區別 :
熱(re)(re)軋(ya)(ya)(ya)(ya)精(jing)密鋼(gang)管(guan)用連鑄圓管(guan)坯板(ban)坯或初(chu)軋(ya)(ya)(ya)(ya)板(ban)坯作原料,經步進式加熱(re)(re)爐加熱(re)(re),高壓水除(chu)鱗后進入(ru)粗軋(ya)(ya)(ya)(ya)機,粗軋(ya)(ya)(ya)(ya)料經切(qie)(qie)(qie)(qie)頭、尾、再進入(ru)精(jing)軋(ya)(ya)(ya)(ya)機,實(shi)施計算機控(kong)制(zhi)軋(ya)(ya)(ya)(ya)制(zhi),終軋(ya)(ya)(ya)(ya)后即(ji)經過層流冷卻和卷(juan)(juan)取機卷(juan)(juan)取、成(cheng)為直(zhi)發(fa)(fa)卷(juan)(juan)。直(zhi)發(fa)(fa)卷(juan)(juan)的頭、尾往(wang)往(wang)呈舌狀(zhuang)及(ji)魚尾狀(zhuang),厚度、寬(kuan)度精(jing)度較差,邊(bian)部常存在浪形(xing)、折邊(bian)、塔形(xing)等(deng)缺陷。其卷(juan)(juan)重較重、鋼(gang)卷(juan)(juan)內徑為760mm。將直(zhi)發(fa)(fa)卷(juan)(juan)經切(qie)(qie)(qie)(qie)頭、切(qie)(qie)(qie)(qie)尾、切(qie)(qie)(qie)(qie)邊(bian)及(ji)多道(dao)次的矯直(zhi)、平整等(deng)精(jing)整線處理后,再切(qie)(qie)(qie)(qie)板(ban)或重卷(juan)(juan),即(ji)成(cheng)為:熱(re)(re)軋(ya)(ya)(ya)(ya)鋼(gang)板(ban)、平整熱(re)(re)軋(ya)(ya)(ya)(ya)鋼(gang)卷(juan)(juan)、縱切(qie)(qie)(qie)(qie)帶等(deng)產(chan)品。熱(re)(re)軋(ya)(ya)(ya)(ya)精(jing)整卷(juan)(juan)若(ruo)經酸洗去除(chu)氧化皮并涂油(you)后即(ji)成(cheng)熱(re)(re)軋(ya)(ya)(ya)(ya)酸洗板(ban)卷(juan)(juan)。
三、熱軋無縫鋼管每米重量表
壁 厚(毫米) | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 |
徑(毫米) | 理 論 重 量 (公斤/米) | ||||||||||
32 | 1.82 | 2.15 | 2.46 | 2.76 | 3.05 | 3.33 | 3.59 | 3.85 | 4.09 | 4.32 | 4.53 |
38 | 2.19 | 2.59 | 2.98 | 3.35 | 3.72 | 4.07 | 4.41 | 4.74 | 5.05 | 5.35 | 5.64 |
42 | 2.44 | 2.89 | 3.35 | 3.75 | 4.16 | 4.56 | 4.95 | 5.33 | 5.69 | 6.04 | 6.38 |
45 | 2.62 | 3.11 | 3.58 | 4.04 | 4.49 | 4.93 | 5.36 | 5.77 | 6.17 | 6.56 | 6.94 |
50 | 2.93 | 3.48 | 4.01 | 4.54 | 5.05 | 5.55 | 6.04 | 6.51 | 6.97 | 7.42 | 7.86 |
54 | - | 3.77 | 4.36 | 4.93 | 5.49 | 6.04 | 6.58 | 7.1 | 7.61 | 8.11 | 8.6 |
57 | - | 4 | 4.62 | 5.23 | 5.83 | 6.41 | 6.99 | 7.55 | 8.1 | 8.63 | 9.16 |
60 | - | 4.22 | 4.88 | 5.52 | 6.16 | 6.78 | 7.39 | 7.99 | 8.58 | 9.15 | 9.71 |
63.5 | - | 4.48 | 5.18 | 5.87 | 6.55 | 7.21 | 7.87 | 8.51 | 9.14 | 9.75 | 10.36 |
68 | - | 4.81 | 5.57 | 6.31 | 7.05 | 7.77 | 8.48 | 9.17 | 9.86 | 10.53 | 11.19 |
70 | - | 4.96 | 5.74 | 6.51 | 7.27 | 8.01 | 8.75 | 9.47 | 10.18 | 10.88 | 11.56 |
73 | - | 5.18 | 6 | 6.81 | 7.6 | 8.38 | 9.16 | 9.91 | 10.66 | 11.39 | 12.11 |
76 | - | 5.4 | 6.26 | 7.1 | 7.93 | 8.75 | 9.56 | 10.36 | 11.14 | 11.91 | 12.67 |
83 | - | - | 6.86 | 7.79 | 8.71 | 9.62 | 10.51 | 11.39 | 12.26 | 13.12 | 13.96 |
89 | - | - | 7.38 | 8.38 | 9.38 | 10.36 | 11.33 | 12.28 | 13.22 | 14.16 | 15.07 |
95 | - | - | 7.9 | 8.98 | 10.04 | 11.1 | 12.14 | 13.17 | 14.19 | 15.19 | 16.18 |
102 | - | - | 8.5 | 9.67 | 10.82 | 11.96 | 13.09 | 14.21 | 15.31 | 16.4 | 17.48 |
108 | - | - | - | 10.26 | 11.49 | 12.7 | 13.9 | 15.09 | 16.27 | 17.44 | 18.59 |
114 | - | - | - | 10.85 | 12.15 | 13.44 | 14.72 | 15.98 | 17.23 | 18.47 | 19.7 |