1990年3月在南(nan)非TOSA香蕉視頻app連接:不銹鋼管廠有1套采用(yong)CPS工(gong)藝(yi)的(de)無縫香蕉視頻app連接:不銹鋼管軋(ya)機投產，其工藝流程如圖27-1所示。
1. CPS軋管工藝流程
CPS軋管(guan)(guan)機組生(sheng)產外徑為(wei)33.4~179.8mm、壁厚為(wei)3.4~25.0mm的熱軋成品管(guan)(guan)和冷(leng)拔(ba)不(bu)銹鋼(gang)(gang)管(guan)(guan)用(yong)料，鋼(gang)(gang)種包括碳素鋼(gang)(gang)、中合金(jin)(jin)鋼(gang)(gang)和含Cr13%的合金(jin)(jin)鋼(gang)(gang)。其變形參數(shu)如下：
管坯(pi)直徑／mm 100,130,150(160)
穿孔坯外徑／mm 150~190
穿(chuan)孔坯壁厚／mm 最(zui)薄5
張力減(jian)徑(jing)管外徑(jing)／mm 33.4~88.9
熱軋荒管(guan)最小(xiao)規格／mm 33.4×3.5
熱軋荒管最大長度／m 60
2. CPS軋管主要工藝設備(bei)的技術(shu)性能(neng)
錐輥式穿孔(kong)機：
延伸系數 4.17~5.50
穿孔坯D/S值 25~27.5
張力(li)減徑機：
單(dan)架(jia)減徑率(lv) 6%~7%
最大減壁率 43%
TOSA不銹鋼管(guan)(guan)(guan)廠(chang)的(de)CPS軋管(guan)(guan)(guan)廠(chang)于1991年7月停(ting)止(zhi)生產，CPS工(gong)(gong)藝由此宣(xuan)告失(shi)敗(bai)。這種(zhong)工(gong)(gong)藝失(shi)敗(bai)的(de)原(yuan)因尚沒(mei)有(you)見到相關的(de)文(wen)字闡述。從變(bian)形參(can)數的(de)角度(du)來(lai)看，找不出什么原(yuan)因。但據(ju)MDM公司的(de)工(gong)(gong)程師反(fan)映，是因為(wei)鋼管(guan)(guan)(guan)內表面(mian)質(zhi)量太差(cha)，且無(wu)法控制(zhi)或予以(yi)改善(shan)。
軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)生產(chan)(chan)中(zhong)通(tong)常(chang)所講的二步或三步軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)法是就變形(xing)階(jie)段(duan)(duan)而言(yan)的，具有“穿(chuan)孔、軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)（延伸(shen)）和精(jing)軋(ya)(ya)”的3個變形(xing)階(jie)段(duan)(duan)軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)工藝就是三步軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)法：將(jiang)穿(chuan)孔和軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)兩(liang)個變形(xing)階(jie)段(duan)(duan)合(he)二為一的軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)工藝即為二步軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)法。很明顯(xian)，CPS軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)工藝即是將(jiang)穿(chuan)孔和軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)兩(liang)個變形(xing)階(jie)段(duan)(duan)合(he)為同一個變形(xing)階(jie)段(duan)(duan)來完(wan)成變形(xing)，從而省去(qu)一道變形(xing)工序，由(you)此使生產(chan)(chan)成本大大降低，產(chan)(chan)品競爭能(neng)力大大提高。目前(qian)，國(guo)內不銹(xiu)鋼管(guan)(guan)(guan)(guan)(guan)(guan)界已(yi)開始研究(jiu)這一工藝，其意義是顯(xian)而易見的。
