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金融界 2025 年 4 月 5 日消息,國(guó)家知識(shí)產(chǎn)權(quán)局信息顯示,衡陽(yáng)華菱鋼管有限公司申請(qǐng)一項(xiàng)名為“無(wú)縫鋼管及其制備方法和應(yīng)用”的專(zhuān)利,公開(kāi)號(hào) CN 119753503 A,申請(qǐng)日期為 2024 年 12 月。
專(zhuān)利摘要顯示,本申請(qǐng)公開(kāi)了一種無(wú)縫鋼管及其制備方法和應(yīng)用。該無(wú)縫鋼管包括:C 0.1 0 ~0.18%,Si0.15~0.3 0 %,Mn 0.8 ~1.5%,P≤0.015%,S≤0.005%,Cu≤0.1 0 %,Cr0.5 ~1.5 %,Mo 0.2 ~0.7%,Ni1.0~1.5%,V0.01~0.08%,V+Nb+Ti≤0.10%,Al0.018~0.050%;Al/N≥2;CEV≤0.75,CEV=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15;余量為Fe和雜質(zhì),共計(jì)100%。該無(wú)縫鋼管具有高精度、高抗拉強(qiáng)度和沖擊韌性、優(yōu)良的抗腐蝕性和可焊性?xún)?yōu)點(diǎn),尤其適用于直徑 700mm 以上且壁厚 70mm 以上無(wú)縫鋼管加工。
管材展-鋼管展-2025第二十五屆廣州國(guó)際管材及管材加工設(shè)備展覽會(huì)-巨浪展覽-The 25th China (Guangzhou) Int''l Tube & Pipe Processing Equipment Exhibition
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