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鵬鑫鋼鐵
河源厚壁鋼管貨源

　　如何控制無縫鋼(gang)(gang)(gang)(gang)管(guan)的(de)(de)分層(ceng)結(jie)構(gou)(gou)(gou)(gou)(gou)(gou)? 　　1.提高(gao)45#結(jie)構(gou)(gou)(gou)(gou)(gou)(gou)鋼(gang)(gang)(gang)(gang)管(guan)的(de)(de)塑性(xing)(xing)(xing)(xing)延展(zhan)性(xing)(xing)(xing)(xing)。 　　提高(gao)鐵液(ye)清潔度(du)水(shui)平(ping)，減少(shao)危害(hai)參(can)(can)與(yu);提高(gao)軋(ya)(ya)鋼(gang)(gang)(gang)(gang)坯(pi)等軸晶比例，減少(shao)管(guan)理中心(xin)松動(dong)和管(guan)理中心(xin)松動(dong);選擇(ze)有效的(de)(de)制冷(leng)(leng)規(gui)章制度(du)，防止鑄鋼(gang)(gang)(gang)(gang)坯(pi)內裂縫;采用緩冷(leng)(leng)加工工藝退出(chu)鑄鋼(gang)(gang)(gang)(gang)坯(pi)或連續軋(ya)(ya)鋼(gang)(gang)(gang)(gang)坯(pi)，降(jiang)低內應(ying)(ying)力(li)，確保精(jing)軋(ya)(ya)管(guan)和成品(pin)45#結(jie)構(gou)(gou)(gou)(gou)(gou)(gou)鋼(gang)(gang)(gang)(gang)管(guan)的(de)(de)機(ji)構(gou)(gou)(gou)(gou)(gou)(gou)和物理性(xing)(xing)(xing)(xing)能(neng)。 　　2.有效控制加熱(re)溫度(du)。 　　根據(ju)測量熱(re)固性(xing)(xing)(xing)(xing)塑料曲線圖選擇(ze)Z佳加熱(re)溫度(du)。精(jing)軋(ya)(ya)管(guan)加熱(re)應(ying)(ying)注意(yi)足夠的(de)(de)隔熱(re)時間(jian)，以(yi)降(jiang)低變形(xing)免疫能(neng)力(li)，提高(gao)45#結(jie)構(gou)(gou)(gou)(gou)(gou)(gou)鋼(gang)(gang)(gang)(gang)管(guan)的(de)(de)塑性(xing)(xing)(xing)(xing)延展(zhan)性(xing)(xing)(xing)(xing)。 　　3.降(jiang)低軋(ya)(ya)輥(gun)(gun)轉速(su)(su)(su)比。 　　軋(ya)(ya)輥(gun)(gun)速(su)(su)(su)度(du)比是(shi)破孔(kong)加工工藝的(de)(de)重要(yao)(yao)主要(yao)(yao)參(can)(can)數。在(zai)整個過程中，從低到高(gao)有一個臨界(jie)值的(de)(de)軋(ya)(ya)輥(gun)(gun)速(su)(su)(su)度(du)比。當軋(ya)(ya)輥(gun)(gun)速(su)(su)(su)度(du)相對(dui)較(jiao)(jiao)低時，精(jing)軋(ya)(ya)管(guan)很(hen)容(rong)易產(chan)生(sheng)孔(kong)腔;當軋(ya)(ya)輥(gun)(gun)速(su)(su)(su)度(du)相對(dui)較(jiao)(jiao)高(gao)時，精(jing)軋(ya)(ya)管(guan)和45#結(jie)構(gou)(gou)(gou)(gou)(gou)(gou)鋼(gang)(gang)(gang)(gang)管(guan)很(hen)容(rong)易產(chan)生(sheng)層(ceng)次缺陷。為了精(jing)軋(ya)(ya)管(guan)和45#結(jie)構(gou)(gou)(gou)(gou)(gou)(gou)鋼(gang)(gang)(gang)(gang)管(guan)的(de)(de)水(shui)平(ping)缺陷，應(ying)(ying)將軋(ya)(ya)輥(gun)(gun)速(su)(su)(su)度(du)比降(jiang)低到初(chu)始(shi)水(shui)平(ping)的(de)(de)臨界(jie)值。

　　無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)是生產和(he)生活中(zhong)(zhong)重要(yao)(yao)的(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)類型，是鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)中(zhong)(zhong)堅(jian)固(gu)耐用(yong)(yong)的(de)(de)(de)重要(yao)(yao)鋼(gang)(gang)(gang)(gang)(gang)(gang)材。無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)在(zai)使(shi)(shi)用(yong)(yong)中(zhong)(zhong)也會遇(yu)到彎曲(qu)(qu)變(bian)形(xing)。當無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)彎曲(qu)(qu)變(bian)形(xing)時(shi)，只要(yao)(yao)能(neng)矯正，無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)就可(ke)以(yi)繼續使(shi)(shi)用(yong)(yong)，否則無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)會影(ying)響(xiang)(xiang)使(shi)(shi)用(yong)(yong)。無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)彎曲(qu)(qu)度(du)(du)也可(ke)以(yi)控(kong)(kong)(kong)(kong)制(zhi)，應從以(yi)下幾個方(fang)面進(jin)(jin)行(xing)控(kong)(kong)(kong)(kong)制(zhi): 　　可(ke)從以(yi)下幾個方(fang)面控(kong)(kong)(kong)(kong)制(zhi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)淬(cui)火時(shi)的(de)(de)(de)彎曲(qu)(qu)度(du)(du): 　　(1)采(cai)用(yong)(yong)先外(wai)(wai)噴(pen)后(hou)內(nei)(nei)噴(pen)的(de)(de)(de)分步(bu)進(jin)(jin)行(xing)冷(leng)(leng)卻系統(tong)工藝。由(you)于無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)內(nei)(nei)部噴(pen)水(shui)(shui)(shui)從無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)一(yi)端(duan)(duan)流向(xiang)另一(yi)端(duan)(duan)，無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)兩端(duan)(duan)的(de)(de)(de)冷(leng)(leng)卻速度(du)(du)不同，導致無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)彎曲(qu)(qu)。因(yin)此，可(ke)采(cai)用(yong)(yong)外(wai)(wai)部噴(pen)水(shui)(shui)(shui)冷(leng)(leng)卻，使(shi)(shi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)表面首先可(ke)以(yi)發(fa)(fa)生發(fa)(fa)展(zhan)組織結構變(bian)化，然后(hou)通過采(cai)用(yong)(yong)公司內(nei)(nei)部噴(pen)水(shui)(shui)(shui)冷(leng)(leng)卻方(fang)式(shi)方(fang)法，避免無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)彎曲(qu)(qu)畸變(bian)，內(nei)(nei)部噴(pen)水(shui)(shui)(shui)比外(wai)(wai)部噴(pen)遲2~10s。 　　(2)減少旋轉(zhuan)(zhuan)(zhuan)輪(lun)上無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)懸掛端(duan)(duan)長度(du)(du)。通過合理布(bu)置旋轉(zhuan)(zhuan)(zhuan)輪(lun)和(he)控(kong)(kong)(kong)(kong)制(zhi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)長度(du)(du)，使(shi)(shi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)端(duan)(duan)部懸浮量控(kong)(kong)(kong)(kong)制(zhi)在(zai)600mm 以(yi)內(nei)(nei)，可(ke)有(you)效降低(di)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)端(duan)(duan)部淬(cui)火時(shi)的(de)(de)(de)離心(xin)(xin)力和(he)彎曲(qu)(qu)度(du)(du)。 　　(3)合理有(you)效控(kong)(kong)(kong)(kong)制(zhi)進(jin)(jin)行(xing)旋轉(zhuan)(zhuan)(zhuan)輪(lun)轉(zhuan)(zhuan)(zhuan)速。 　　(4)控(kong)(kong)(kong)(kong)制(zhi)水(shui)(shui)(shui)淬(cui)轉(zhuan)(zhuan)(zhuan)輪(lun)中(zhong)(zhong)心(xin)(xin)。旋轉(zhuan)(zhuan)(zhuan)輪(lun)進(jin)(jin)行(xing)中(zhong)(zhong)心(xin)(xin)存在(zai)偏差(cha)對無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)淬(cui)火時(shi)彎曲(qu)(qu)度(du)(du)有(you)較大(da)發(fa)(fa)展(zhan)影(ying)響(xiang)(xiang)。研(yan)究表明，轉(zhuan)(zhuan)(zhuan)輪(lun)中(zhong)(zhong)心(xin)(xin)距(ju)應控(kong)(kong)(kong)(kong)制(zhi)在(zai)0 ~ 5mm。 　　(5)控(kong)(kong)(kong)(kong)制(zhi)企業內(nei)(nei)外(wai)(wai)噴(pen)水(shui)(shui)(shui)量及均勻性。外(wai)(wai)表面層(ceng)流冷(leng)(leng)卻和(he)內(nei)(nei)軸向(xiang)噴(pen)射用(yong)(yong)于油(you)井管(guan)(guan)(guan)(guan)(guan)淬(cui)火時(shi)，外(wai)(wai)噴(pen)射水(shui)(shui)(shui)的(de)(de)(de)大(da)小和(he)均勻性、內(nei)(nei)噴(pen)射水(shui)(shui)(shui)的(de)(de)(de)大(da)小以(yi)及內(nei)(nei)噴(pen)射水(shui)(shui)(shui)的(de)(de)(de)作用(yong)(yong)也是影(ying)響(xiang)(xiang)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)水(shui)(shui)(shui)淬(cui)曲(qu)(qu)率的(de)(de)(de)重要(yao)(yao)因(yin)素。