(東北大學(xué) 材料與冶金學(xué)院，沈陽 110004)
摘 要: 采用自行設(shè)計(jì)的連續(xù)流變擴(kuò)展成形技術(shù)裝置對6201鋁合金管材的制備進(jìn)行研究。結(jié)果表明：連續(xù)流變擴(kuò)展成形可以制備質(zhì)量良好的6201鋁合金管材。制備d80 mm的6201合金管材最佳藝工藝條件為：擠壓輪冷卻水流量為10~15 L/min；澆注溫度為750~780 ℃；模具預(yù)熱溫度為500~560 ℃；擠壓輪轉(zhuǎn)速為15 r/min。制品在線水淬固溶并在150 ℃時(shí)效10 h后的抗拉強(qiáng)度為300 MPa，伸長率為10.2%，等效導(dǎo)電率為47.4%IACS，抗拉強(qiáng)度比Al-Mg-Si-Cu鋁合金管母線提高15%，等效導(dǎo)電率提高3%。
關(guān)鍵字: 6201合金；管材；連續(xù)流變擴(kuò)展成形；時(shí)效；性能
producing 6201 alloy tube
（School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China）
Abstract:Continuous extending rheo-extrusion process for producing 6201 alloy tube was investigated by using a self-designed setup. The results show that 6201 alloy tube with good performance can be successfully manufactured by the proposed technique. The optimal process conditions for producing 6201 alloy tube with d80 mm are obtained as follows: the velocity of roll cooling water is 10−15 L/min; the casting temperature is 750−780 ℃; the mould preheating temperature is 500−560 ℃; the velocity of the roll is 15 r/min. After being water quenched for solid solution and artificial aging at 150 ℃ for 10 h, the tensile strength of the product reaches 300 MPa, the elongation is 10.2% and the equivalent conductivity reaches 47.4%IACS. Comparing with the conducting tube of Al-Mg-Si-Cu alloy, the tensile strength is improved by 15% and the equivalent conductivity is improved by 3%.
Key words: 6201 alloy; tube; continuous extending rheo-extrusion; aging; property
