氯化钠粉压体热挤压成形性能
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摘要
为了解氯化钠粉压体的高温高压变形情况和成形性能,在不同挤压比、不同挤压温度以及不同坯料高度的条件下,研究了氯化钠粉压体热挤压棒材的成形情况。实验表明:热挤压成形盐棒过程中,粉压体端面上的比压力在100MPa左右。当挤压比为9.77,挤压温度为460℃,坯料高度为20mm时,成形盐棒的综合性能指标最高。造成氯化钠粉压体在热挤压条件下变形的原因除了晶体内部的螺型位错的交滑移和晶粒边界位错的攀移,氯化钠粉压体晶粒在成形过程中发生的再结晶和晶粒长大也是重要因素。
The deformation properties of compressed NaCl powder at high temperatures and pressures were measured using hot extrusions of NaCl bars with various extrusion ratios, temperatures, and heights of the NaCl blanks. The extrusion pressure of container was about 100 MPa in the hot extrusion process. The comprehensive properties of the hot extrusion bar were the best with an extrusion ratio of 9.77, temperature of 460 ℃, and NaCl blank height of 20 mm. The deformation of the hot extrusion was due to cross-slip of screw dislocations and climb-of-edge dislocations with recrystallization and grain growth of the compressed NaCl powder grains as another important factor.
The deformation properties of compressed NaCl powder at high temperatures and pressures were measured using hot extrusions of NaCl bars with various extrusion ratios, temperatures, and heights of the NaCl blanks. The extrusion pressure of container was about 100 MPa in the hot extrusion process. The comprehensive properties of the hot extrusion bar were the best with an extrusion ratio of 9.77, temperature of 460 ℃, and NaCl blank height of 20 mm. The deformation of the hot extrusion was due to cross-slip of screw dislocations and climb-of-edge dislocations with recrystallization and grain growth of the compressed NaCl powder grains as another important factor.
引文
[1]Mazariegos R A,Andrews MJ,Russell J E.Modeling the evolution of salt structures using nonlinear rocksalt flowlaws[J].Tectonophysics,1996,256:129-143.
[2]郤保平,徐素国,赵延林,等.盐岩夹层蠕变特性实验研究与理论分析[J].太原理工大学学报,2006,37(2):123-126.XI Baoping,XUSuguo,ZHAO Yanlin,et al.Experi mental study and theoretic analysis on creep property of rock salt interlayer[J].Journal of Taiyuan University of Technology,2006,37(2):123-126.(in Chinese)
[3]梁卫国,徐素国,刘江,等.金坛储气库岩盐蠕变特性及其实用本构研究[J].辽宁工程技术大学学报,2007,26(3):355-357.LI ANG Weiguo,XU Suguo,LI UJiang,et al.Research on creep property and practical constitutive equation of rock salt in Jintan gas storage of China[J].Journal of Liaoning Technical University,2007,26(3):355-357.(in Chinese)
[4]刘新荣,钟祖良.用于核废料处理的岩盐溶腔力学特性[J].重庆大学学报(自然科学版),2007,30(10):76-81.LI U Xinrong,ZHONG Zuliang.Mechanical behavior of rocksalt cavernfor radioactive waste disposal[J].Journal of Chongqing University(Natural Science Edition),2007,30(10):76-81.(in Chinese)
[5]孙天泽,刘斟,张佩春,等.盐用做高温高压实验传压介质一种新方法[J].地球物理学进展,1995,10(4):32-37.SUN Tianze,LI U Zhen,ZHANG Peichun,et al.A new method of applying salt medium for rock high temperature and pressure experi ments[J].Progress in Geophysics,1995,10(4):32-37.(in Chinese)
[6]岳石,马瑞.氯化钠传压介质高温高压岩石变形实验的应力和围压修正[J].地震地质,1993,15(1):90-96.YUE Shi,MA Rui.Calibration of stress and confining pressure in experi ment of rock deformation under high pressure andtemperature by using NaCl pressure transmitting medium[J].Seismology and Geology,1993,15(1):90-96.(in Chinese)
[7]王天石.金属热挤压无压余技术初步研究[D].北京:清华大学,2009.
[8]王天石,张人佶,颜永年,等.铝材无压余热挤压成形研究[J].电加工与模具,2009(4):32-35.WANG Tianshi,ZHANG Renji,YAN Yongnian,et al.Research on aluminum hot extrusion without discard[J].Electromachining&Mould,2009(4):32-35.(in Chinese)
[9]Carter N L,Handin J,Russell J E,et al.Rheology of rocksalt[J].Struct Geol,1993,15:1257-1271.
[10]Horseman S T,Handin J.Triaxial-compression tests on rocksalt at temperature from50℃to200℃and strain rate from10-4to10-9s-1[M]//The Bittle-Ductile Transitionin Rocks.Washington DC,USA:Am Grophys Union,1990,56:103-110.
[11]Gleason G C,Tullis J.A flow law for dislocation creep of quartz aggregates determined with the molten salt cell[J].Tectonophysics,1995,247:1-23.
[2]郤保平,徐素国,赵延林,等.盐岩夹层蠕变特性实验研究与理论分析[J].太原理工大学学报,2006,37(2):123-126.XI Baoping,XUSuguo,ZHAO Yanlin,et al.Experi mental study and theoretic analysis on creep property of rock salt interlayer[J].Journal of Taiyuan University of Technology,2006,37(2):123-126.(in Chinese)
[3]梁卫国,徐素国,刘江,等.金坛储气库岩盐蠕变特性及其实用本构研究[J].辽宁工程技术大学学报,2007,26(3):355-357.LI ANG Weiguo,XU Suguo,LI UJiang,et al.Research on creep property and practical constitutive equation of rock salt in Jintan gas storage of China[J].Journal of Liaoning Technical University,2007,26(3):355-357.(in Chinese)
[4]刘新荣,钟祖良.用于核废料处理的岩盐溶腔力学特性[J].重庆大学学报(自然科学版),2007,30(10):76-81.LI U Xinrong,ZHONG Zuliang.Mechanical behavior of rocksalt cavernfor radioactive waste disposal[J].Journal of Chongqing University(Natural Science Edition),2007,30(10):76-81.(in Chinese)
[5]孙天泽,刘斟,张佩春,等.盐用做高温高压实验传压介质一种新方法[J].地球物理学进展,1995,10(4):32-37.SUN Tianze,LI U Zhen,ZHANG Peichun,et al.A new method of applying salt medium for rock high temperature and pressure experi ments[J].Progress in Geophysics,1995,10(4):32-37.(in Chinese)
[6]岳石,马瑞.氯化钠传压介质高温高压岩石变形实验的应力和围压修正[J].地震地质,1993,15(1):90-96.YUE Shi,MA Rui.Calibration of stress and confining pressure in experi ment of rock deformation under high pressure andtemperature by using NaCl pressure transmitting medium[J].Seismology and Geology,1993,15(1):90-96.(in Chinese)
[7]王天石.金属热挤压无压余技术初步研究[D].北京:清华大学,2009.
[8]王天石,张人佶,颜永年,等.铝材无压余热挤压成形研究[J].电加工与模具,2009(4):32-35.WANG Tianshi,ZHANG Renji,YAN Yongnian,et al.Research on aluminum hot extrusion without discard[J].Electromachining&Mould,2009(4):32-35.(in Chinese)
[9]Carter N L,Handin J,Russell J E,et al.Rheology of rocksalt[J].Struct Geol,1993,15:1257-1271.
[10]Horseman S T,Handin J.Triaxial-compression tests on rocksalt at temperature from50℃to200℃and strain rate from10-4to10-9s-1[M]//The Bittle-Ductile Transitionin Rocks.Washington DC,USA:Am Grophys Union,1990,56:103-110.
[11]Gleason G C,Tullis J.A flow law for dislocation creep of quartz aggregates determined with the molten salt cell[J].Tectonophysics,1995,247:1-23.
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