亚洲国产成人精彩精品,小蝌蚪视频在线观看国语版,亚洲国产成人久久三区,亚洲第一福利视频导航,亚洲阿v天堂2021在线观看,亚洲四虎永久在线播放

歡迎來到鹽山昱通螺旋鋼管實體生產(chǎn)企業(yè)!

服務熱線:

139-0327-6700

銷售熱線:

0317-5760336

昱通管道

鹽山昱通管道

專業(yè)生產(chǎn)銷售大口徑厚壁國標螺旋鋼管,廠內(nèi)加工防腐/保溫/涂塑

×
服務熱線:

139-0327-6700

新聞中心

您現(xiàn)在的位置:
首頁 > 鋼管百科 > 劣質(zhì)螺旋焊管結疤原因分析

劣質(zhì)螺旋焊管結疤原因分析

日期:2020-02-28

螺旋埋弧焊管表面質(zhì)量差的原因容易產(chǎn)生兩種結疤現(xiàn)象:

劣質(zhì)螺旋焊管結疤原因分析

(1) 劣質(zhì)螺旋鋼材雜質(zhì)不均勻。

(2) 劣質(zhì)材料生產(chǎn)廠家導衛(wèi)設備差,易粘鋼,易產(chǎn)生這些雜質(zhì)咬輥后結疤。

劣質(zhì)螺旋鋼管橫肋薄而低,往往出現(xiàn)足夠不滿意的現(xiàn)象,由于廠家要達到較大的負公差,完成前幾道減徑量過大,鐵型偏小,通過充分不滿意。劣質(zhì)鋼管沒有金屬光澤,淡紅色或類似生鐵顏色,有兩個原因,那就是毛坯。較低的軋制溫度是不標準的,它們都是鋼的外觀溫度,所以不能按照奧氏體區(qū)的規(guī)定進行軋制,不能達到鋼的自然性能。

標簽:
主站蜘蛛池模板: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |