行星轧制变形程度对TP2铜管材组织及性能的影响
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摘要
目的研究行星轧制变形程度对TP2铜管材在轧制和联拉时的组织和性能的影响。方法采用金相显微分析和拉伸实验,研究行星轧制变形程度对TP2铜管铸坯轧拉态以及拉拔态组织及性能的影响规律。结果经连续铸造的TP2铸坯为柱状晶,且由外向内成长。经行星轧制、联拉后的管材晶粒纤维流线,其晶粒显著拉长,随着轧制变形程度的增加,流线减弱,晶粒更加细化。轧制变形程度为93%与90%的轧管屈服强度、抗拉强度分别降低了22.83%和7.59%,伸长率提升了4.44%,塑性变形能力增加。结论随着轧制变形程度的增加,联拉管抗拉强度略有提高,而伸长率得到了保持。
The aim is to study effects of planetary rolling deformation on microstructure and properties of TP2 copper tube during rolling and tension. The effect law of planetary rolling deformation on microstructure and properties of TP2 copper tube during rolling and drawing were studied by optical metallographic microscope and testing machine. The results indicated that the TP2 casting of continuous casting was columnar and grew from the outside to the inside. The grain fiber streamline of the tube after planetary rolling and drawing was significantly elongated. With the increase of rolling deformation, the streamlines became weaker and the grains became more refined. The yield strength and tensile strength of rolled tubes with rolling deformation of 93% and 90% respectively were decreased by 22.83% and 7.59% respectively, their elongation was increased by4.44%, and their plastic deformation ability was increased. The tensile strength and slightly increases and the elongation is maintained with the increase of the rolling deformation.
The aim is to study effects of planetary rolling deformation on microstructure and properties of TP2 copper tube during rolling and tension. The effect law of planetary rolling deformation on microstructure and properties of TP2 copper tube during rolling and drawing were studied by optical metallographic microscope and testing machine. The results indicated that the TP2 casting of continuous casting was columnar and grew from the outside to the inside. The grain fiber streamline of the tube after planetary rolling and drawing was significantly elongated. With the increase of rolling deformation, the streamlines became weaker and the grains became more refined. The yield strength and tensile strength of rolled tubes with rolling deformation of 93% and 90% respectively were decreased by 22.83% and 7.59% respectively, their elongation was increased by4.44%, and their plastic deformation ability was increased. The tensile strength and slightly increases and the elongation is maintained with the increase of the rolling deformation.
引文
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[16]汪志刚,冯兴宇,杨泰胜,等.第二相粒子与织构对高强Cu-Ni-Si系合金薄板各向异性的影响[J].工程科学学报,2017,39(6):867-874.WANG Zhi-gang,FENG Xing-yu,YANG Tai-sheng,et al.Effects of Precipitates and Texture on the Anisotropy of High-strength Cu-Ni-Si Alloy Sheets[J].Journal of University of Science and Technology Beijing,2017,39(6):867-874.
[2]RANJBARZADEH R,MEGHDADI A H,AFRAND M,et al.An Experimental Study on Heat Transfer and Pressure Drop of Water/Graphene Oxide Nanofluidin a Copper Tube under Air Cross-flow:Applicable as a Heat Exchanger[J].Applied Thermal Engineering,2017,125(10):69-79.
[3]LIU N,LAI X L,KAI Y,et al.Investigation of Flow and Heat Transfer Characteristics on Different Heat Exchangers of Air Conditioner[J].Applied Thermal Engineering,2016,103(25):428-433.
[4]胡新芳,邵明星,韩潇潇,等.硼对纯铜的细化机理研究[J].精密成形工程,2018,10(6):17-21.HU Xin-fang,SHAO Ming-xing,HAN Xiao-xiao,et al.Boron Refining Mechanism of Pure Copper[J].Journal of Netshape Forming Engineering,2018,10(6):17-21.
[5]危利民,罗欣,余琪.退火工艺对薄壁铜管组织和性能的影响[J].铜业工程,2018(6):9-13.WEI Li-min,LUO Xin,YU Qi.Effect of Annealing Process on the Structure and Mechanical Properties of Thin Wall Copper Tube[J].Copper Engineering,2018(6):9-13.
[6]张士宏,张金利,刘劲松,等.铜管铸轧技术的新进展[J].世界有色金属,2006(7):14-17.ZHANG Shi-hong,ZHANG Jin-li,LIU Jin-song,et al.New Advancement of Casting Technologies for Copper Tubing[J].World Nonferrous Metals,2006(7):14-17.
[7]周文龙,许沂,张士宏,等.铸轧法与挤压法生产TP2铜管组织和性能对比分析[J].塑性加工技术,2004(1):34-37.ZHOU Wen-long,XU Yi,ZHANG Shi-hong,et al.Comparisons&Analyses of the Microstructure&Mechanical Properties for TP2 Copper Tubes Produced by Cast-roll Processes&Extrusion Processes[J].World Nonferrous Metals,2004(1):34-37.
[8]张士宏,刘劲松,程明.精密铜管铸轧加工技术[M].北京:国防工业出版社,2016.ZHANG Shi-hong,LIU Jin-song,CHENG Ming.Cast and Roll Technology of Precision Copper Tubes[M].Beijing:National Defend Industry Press,2016.
[9]肖寒,张士宏,张海渠,等.TP2铜管坯水平连铸表面裂纹研究[J].特种铸造及有色合金,2007,27(11):864-866.XIAO Han,ZHANG Shi-hong,ZHANG Hai-qu,et al.Study on Surface Crack of TP2 Copper Tube Billet in Horizontal Continuous Casting[J].Special Casting and Nonferrous Alloys,2007,27(11):864-866.
[10]CHIH-KANG Shih,CHINGHUA Hung,RAY-QUEN Hsu.The Finite Element Analysis on Planetary Rolling Process[J].Journal of Materials Processing Technology,2001,113:115-123.
[11]CHIH-KANG Shih,CHINGHUA Hung.Experimental and Numerical Analyses on Three-roll Planetary Rolling Process[J].Journal of Materials Processing Technology,2003,142:702-709.
[12]周默,运新兵,赵颖.轧辊压下量对铜板带连挤连轧的影响[J].塑性工程学报,2015,22(5):88-93.ZHOU Mo,YUN Xin-bing,ZHAO Ying.Effects of Rolling Reduction on Continuous Extrusion and Rolling of Copper Strips[J].Journal of Plasticity Engineering,2015,22(5):88-93.
[13]运新兵,王聪,田甜,等.轧制压下量对连挤连轧铜排组织和性能的影响[J].精密成形工程,2015,7(4):1-5.YUN Xin-bing,WANG Cong,TIAN Tian,et al.Effects of Rolling Reduction on Microstructure and Properties of Copper Strips during Continuous Extrusion and Rolling[J].Journal of Netshape Forming Engineering,2015,7(4):1-5.
[14]董营,张进生,王志,等.铜管三辊行星轧制过程轧辊轴力学行为分析[J].热加工工艺,2016,45(5):111-115.DONG Ying,ZHANG Jin-sheng,WANG Zhi,et al.Analysis of Mechanical Behavior of Roll Shaft in Copper Tube Three-roll Planetary Rolling Process[J].Hot Working Technology,2016,45(5):111-115.
[15]刘劲松,王芳,李艳娟.TP2铜管坯行星旋轧组织演变规律的研究[J].沈阳理工大学学报,2008,27(5):61-64.LIU Jin-song,WANG Fang,LI Yan-juan.Research on Microstructure Evolutions of TP2 Planetary Rolling of Copper Tubes Blank[J].Transactions of Shenyang Ligong University,2008,27(5):61-64.
[16]汪志刚,冯兴宇,杨泰胜,等.第二相粒子与织构对高强Cu-Ni-Si系合金薄板各向异性的影响[J].工程科学学报,2017,39(6):867-874.WANG Zhi-gang,FENG Xing-yu,YANG Tai-sheng,et al.Effects of Precipitates and Texture on the Anisotropy of High-strength Cu-Ni-Si Alloy Sheets[J].Journal of University of Science and Technology Beijing,2017,39(6):867-874.