新型切向分块式两面顶超高压模具
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摘要
以提高年轮式超高压模具的压力承载能力为目标,设计一种新型切向剖分式模具结构。切向剖分式结构通过剖分面上的相互摩擦和挤压,不仅能够消除压缸内壁的周向拉应力,而且在内壁上产生较大的周向压应力。这种受压状态对硬质合金材料非常有利,可以显著提高压缸的极限承载能力。数值模拟结果显示,在相同的载荷条件下,分块式压缸受到的等效应力显著小于年轮式压缸。分块式压缸内壁的3个主应力均为压应力,且差值较小,接近于等静压状态,因此能够承受更高的样品腔压力。对比实验结果同样证明切向剖分式超高压模具结构具有更高的极限承载能力。
A novel tangential split apparatus was designed to improve the pressure bearing capacity of the ultra-high pressure die. The tangential block structure can not only eliminate the circumferential tensile stress of the inner wall of the cylinder through mutual friction and extrusion on the split surface, but also generate a large circumferential compressive stress on the inner wall. This pressed state is very advantageous for the cemented carbide material and can significantly increase the ultimate pressure capacity of the cylinder. The numerical simulation results show that under the same load conditions, the equivalent stress of the segmented cylinder is significantly less than that of the belt cylinder. The three principal stresses on the inner wall of the block cylinder are compressive stress, and the difference is small. These stresses are close to the isostatic pressure state, so the cylinder can withstand higher sample chamber pressure. The comparative experimental results also prove that the tangential split-belt ultrahigh pressure apparatus has higher ultimate load carrying capacity.
A novel tangential split apparatus was designed to improve the pressure bearing capacity of the ultra-high pressure die. The tangential block structure can not only eliminate the circumferential tensile stress of the inner wall of the cylinder through mutual friction and extrusion on the split surface, but also generate a large circumferential compressive stress on the inner wall. This pressed state is very advantageous for the cemented carbide material and can significantly increase the ultimate pressure capacity of the cylinder. The numerical simulation results show that under the same load conditions, the equivalent stress of the segmented cylinder is significantly less than that of the belt cylinder. The three principal stresses on the inner wall of the block cylinder are compressive stress, and the difference is small. These stresses are close to the isostatic pressure state, so the cylinder can withstand higher sample chamber pressure. The comparative experimental results also prove that the tangential split-belt ultrahigh pressure apparatus has higher ultimate load carrying capacity.
引文
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[3]HALL H T.Ultra-high-pressure,high-temperature apparatus:the"Belt"[J].Review of Scientific Instruments,1960,31(2):125-131.
[4]KHVOSTANTSEV L G,VERESHCHAGIN L F,NOVIKOV A P.Device of toroid type for high pressure generation[J].High Temperatures High Pressures,1977,9(3):637-640.
[5]胡静竹,唐汝明,徐济安.金刚石压砧高压装置及I2和S高压相变的观察[J].物理学报,1980,29(10):1351-1354.HU J Z,TANG R M,XU J A.The high pressure device of diamond anvil and the observation of phase transition of iodine and sulphur[J].Acta Physica Sinica,1980,29(10):1351-1354.
[6]韩奇钢,马红安,肖宏宇,等.基于有限元法分析宝石级金刚石的合成腔体温度场[J].物理学报,2010,59(3):1923-1927.HAN Q G,MA H A,XIAO H Y,et al.Finite element method study on the temperature distribution in the cell of large single crystal diamond[J].Acta Physica Sinica,2010,59(3):1923-1927.
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[9]BUNDY F P.Pressure-temperature phase diagram of iron to 200 kbar,900℃[J].Journal of Applied Physics,1965,36(2):616-620.
[10]LEGER J M,LORIERS-SUSSE C,VODAR B.Pressure effect on the Curie temperatures of transition metals and alloys[J].Physical Review B,1972,6(11):4250-4261.
[11]肖宏宇,李尚升,秦玉琨,等.高温高压下掺硼宝石级金刚石单晶生长特性的研究[J].物理学报,2014,63(19):198101.XIAO H Y,LI S S,QIN Y K,et al.Studies on synthesis of boron-doped Gem-diamond single crystals under high temperature and high pressure[J].Acta Physica Sinica,2014,63(19):198101.
[12]王海阔,贺端威,许超,等.基于国产铰链式六面顶压机的大腔体静高压技术研究进展[J].高压物理学报,2013,27(5):633-661.WANG H K,HE D W,XU C,et al.Development of large volume-high static pressure techniques based on the hinge-type cubic presses[J].Chinese Journal of High Pressure Physics,2013,27(5):633-661.
[13]LIU Z,LI M,YANG Y,et al.Study on pressure capacity of multilayer stagger-split die,using simulation-based optimization[J].High Pressure Research,2013,33(4):787-794.
[14]KLüNSNER T,WURSTER S,SUPANCIC P,et al.Effect of specimen size on the tensile strength of WC-Co hard metal[J].Acta Materialia,2011,59(10):4244-4252.
[15]GETTING I C,CHEN G,BROWN J A.The strength and rheology of commercial tungsten carbide cermets used in highpressure apparatus[J].Pure and Applied Geophysics,1993,141(2):545-577.
[16]WANG B,LI M,YANG Y,et al.Note:double-beveled multilayer stagger-split die for a large volume high-pressure apparatus[J].Review of Scientific Instruments,2015,86(8):086106.
[17]VRBKA J,KNESL Z.Proceedings of high pressure geoscience and material synthesis[C].Berlin:Akademie-Verlag,1988:234.
[2]BUNDY F P,HALL H T,STRONG H M,et al.Man-made diamonds[J].Nature,1955,176(4471):51-55.
[3]HALL H T.Ultra-high-pressure,high-temperature apparatus:the"Belt"[J].Review of Scientific Instruments,1960,31(2):125-131.
[4]KHVOSTANTSEV L G,VERESHCHAGIN L F,NOVIKOV A P.Device of toroid type for high pressure generation[J].High Temperatures High Pressures,1977,9(3):637-640.
[5]胡静竹,唐汝明,徐济安.金刚石压砧高压装置及I2和S高压相变的观察[J].物理学报,1980,29(10):1351-1354.HU J Z,TANG R M,XU J A.The high pressure device of diamond anvil and the observation of phase transition of iodine and sulphur[J].Acta Physica Sinica,1980,29(10):1351-1354.
[6]韩奇钢,马红安,肖宏宇,等.基于有限元法分析宝石级金刚石的合成腔体温度场[J].物理学报,2010,59(3):1923-1927.HAN Q G,MA H A,XIAO H Y,et al.Finite element method study on the temperature distribution in the cell of large single crystal diamond[J].Acta Physica Sinica,2010,59(3):1923-1927.
[7]KAWAI N,ENDO S.The generation of ultrahigh hydrostatic pressures by a split sphere apparatus[J].Review of Scientific Instruments,1970,41(8):1178-1181.
[8]吕世杰,罗建太,苏磊,等.滑块式六含八超高压实验装置及其压力温度标定[J].物理学报,2009,58(10):6852-6857.LüS J,LUO J T,SU L,et al.A slide-type multianvil ultrahigh pressure apparatus and calibrations of its pressure and temperature[J].Acta Physica Sinica,2009,58(10):6852-6857.
[9]BUNDY F P.Pressure-temperature phase diagram of iron to 200 kbar,900℃[J].Journal of Applied Physics,1965,36(2):616-620.
[10]LEGER J M,LORIERS-SUSSE C,VODAR B.Pressure effect on the Curie temperatures of transition metals and alloys[J].Physical Review B,1972,6(11):4250-4261.
[11]肖宏宇,李尚升,秦玉琨,等.高温高压下掺硼宝石级金刚石单晶生长特性的研究[J].物理学报,2014,63(19):198101.XIAO H Y,LI S S,QIN Y K,et al.Studies on synthesis of boron-doped Gem-diamond single crystals under high temperature and high pressure[J].Acta Physica Sinica,2014,63(19):198101.
[12]王海阔,贺端威,许超,等.基于国产铰链式六面顶压机的大腔体静高压技术研究进展[J].高压物理学报,2013,27(5):633-661.WANG H K,HE D W,XU C,et al.Development of large volume-high static pressure techniques based on the hinge-type cubic presses[J].Chinese Journal of High Pressure Physics,2013,27(5):633-661.
[13]LIU Z,LI M,YANG Y,et al.Study on pressure capacity of multilayer stagger-split die,using simulation-based optimization[J].High Pressure Research,2013,33(4):787-794.
[14]KLüNSNER T,WURSTER S,SUPANCIC P,et al.Effect of specimen size on the tensile strength of WC-Co hard metal[J].Acta Materialia,2011,59(10):4244-4252.
[15]GETTING I C,CHEN G,BROWN J A.The strength and rheology of commercial tungsten carbide cermets used in highpressure apparatus[J].Pure and Applied Geophysics,1993,141(2):545-577.
[16]WANG B,LI M,YANG Y,et al.Note:double-beveled multilayer stagger-split die for a large volume high-pressure apparatus[J].Review of Scientific Instruments,2015,86(8):086106.
[17]VRBKA J,KNESL Z.Proceedings of high pressure geoscience and material synthesis[C].Berlin:Akademie-Verlag,1988:234.
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