挤压比

通过液淬法获得挤压比为40的AZ91D镁合金等温处理过程中的半固态组织，研究其球化机制。

Microstructural spheroidization of extruded AZ91D magnesium alloys with a high extrusion ratio of40 was investigated at semisolid state .

研究了挤压比、挤压温度及电场退火对AZ31镁合金组织和织构的影响。

The effect of extrusion ratio , temperature and electric field annealing on microstructure and texture of AZ31 magnesium alloy were investigated .

大挤压比铝型材挤压过程的数值模拟

Numerical simulation of extrusion process of aluminum profile with large extrusion ratio

大挤压比薄壁件复合挤压成形工艺过程的数值模拟

Finite Element Simulation of Large Distortion and thin Part in Combined Extrusion Process

增大挤压比有利于型材焊合，提高了焊缝质量，为此对现有的断面重新进行机台布置，使挤压比达到30～80。

Increasing the extrusion ratio to 30 ~ 80 can improve the welding quality .

提高挤压比，有利于复合材料性能的提高。

Increasing of extrusion ratio was beneficial to the improvement of mechanical properties of composites .

随着挤压比的增加，抗拉强度和伸长率提高。

With the increasing of extrusion ratio , both tensile strength and extensibility are improved .

挤压比为R1.5时，屈服强度随挤压温度的降低而升高。

The yield strength of alloy increased with decreasing temperature when extrusion ratio was 1.5 .

随着挤压比的增大，屑粒尺寸的减小，腐蚀程度减轻，腐蚀速率呈递减趋势。

The corrosion rate and degree is decreased with increased extrusion ratio and decreased chips size .

增大摩擦，增大挤压比，增加挤压速度均使模具温度升高。

As increase of extrusion ratio , friction factor and extrusion speed , the die temperature rises .

增大挤压比，减小模具转角，增大摩擦因数均使等效应变增大。

The effective strain increases with the increase of extrusion ratio and friction factor or reduce of channel angular .

大挤压比+轧制确保合金获得平均晶粒尺寸小于5μm的细晶镁合金薄板。

High extrusion ratio and rolling ensured thinner strip of magnesium alloy with average size of grains less then 5 μ m.

同时，随着挤压比的增大，晶粒细化程度增加，合金的力学性能单调增加。

Meanwhile , with increasing in extrusion ratio , the mechanical properties of the extruded alloy are improved due to grain refinement .

采用不同挤压比、不同加热温度和不同铝/盐比的实验条件，研究了铝材无压余热挤压工艺的成形性能。

The forming performance of aluminum hot extrusion without discard technology was studied under varied extrusion ratio , temperature and ratio of aluminum / salt .

当挤压比一定时，随着在线固溶温度与时效温度的升高，线材的力学性能下降，导电性能升高。

For a given extrusion ratio , mechanical properties of alloy wire decrease and conductivity increases with increase of on-line solution temperature and ageing temperature .

得到了以下结论：1.挤压比不变温度升高时，网格先减小再增大。

The following conclusions wereobtained : ( 1 ) The grid firstly became bigger and then smaller when the temperaturerises while the extrusion ratio do not change .

在相同挤压比下，随着挤压温度升高晶粒逐渐长大，在相同温度下，挤压比越大晶粒越小。

The grain grow with the extrusion temperature rise at the same extrusion ratio and the grain smaller with the extrusion ratio enlarge at the same extrusion temperature .

与最近的试验研究得出的工艺参数挤压比为3-10，挤压速度为50-120mm/s，吻合的很好。

Obtained with a recent experimental study of process parameters of extrusion ratio is 3-10 , extrusion speed of 50-120 mm / s , consistent with the good .

本文分析了银石墨触头材料在大挤压比的纤维化挤压中，出现的挤压力过大引起闷车和挤压碎裂的问题。

This paper deals with the problems such as extrusion failure and cxtrusion breaksocurring during the extrusion of silver-graphite materials at high cxtrusion ratio ( so called fibretype extrusion ) .

挤压比选取合理，对不同煤质的适应性强，解决了把粉煤成型为空芯煤棒的技术难题；

The extrusion ratio is chosen reasonably , the adaptability to various coal qualities is strong , and the technological problem that the powder coal is pressed into hollow coal rods is solved .

结果表明：挤压比达到16时动态再结晶基本完成，挤压比为25时形成平均晶粒尺寸为7.3μm的均匀组织；

The results show that the dynamic recrystallization is completed when the extrusion ratio reaches 16.When the extrusion ratio is 25 , the microstructure of fine and even grains with average dimension of 7.3 μ m can be obtained .

通过模拟分析的结果可以看到，在分流孔中进行宽展不仅降低了因为单独使用宽展模具而增加的挤压力，而且可以挤压比圆挤压筒直径更宽的壁板型材。

By analyzing the simulation results , the porthole-expanding die not only reduce the load of extrusion but also produce the alloy profile more wider than round extrusion chamber , and the streamline die can reduce the load of extrusion effectively .

对比分析挤压比、凹模模角、管坯加热温度、挤压速度对挤压力，管坯出口温度，坯料的等效应力的变化规律，总结出最佳的成形工艺参数。

Comparative analysis of extrusion ratio , die angle of die , billet heating temperature , extrusion speed on extrusion pressure , the tube outlet temperature , the blank equivalent stress variation , summed up the best forming process parameters ranges .

结果表明，应变和挤压比与破碎应力成正比，温度与破碎应力成反比，受力面积s1与S3相差越大，破碎应力就越大。

The results indicate that : both strain and extrusion ratios are in direct proportion to crushing stress , while temperature is in inverse proportion to crushing stress . The more D-value of stress area s_1 and s_3 is , the more crushing stress .

研究了变形工艺参数，包括变形温度、凸模速度、凸模压下量、挤压比和摩擦因子，对变形过程中应力、应变和温升的影响。

Effect of the process parameters , including deformation temperature , punch velocity , height reduction , extrusion ratio and shear factor of friction on the equivalent stress , the equivalent strain and the temperature raise during the semi-solid backward extrusion has been studied .

挤压铸造比压对晶粒尺寸的影响

Effects of the Specific Pressure on Grain Size in Squeeze Casting

挤压铸造比压对铜合金阀体性能的影响

Influence of Specific Pressure Value in Squeeze Casting on Properties of Cu Alloy Valve Body

阐述了挤压铸造比压对形核率及成长线速度的影响。

Effects of the specific pressure on nucleation rate and linear growth velocity were expounded in squeeze casting .

结果：与球形挤压器比，扁平心脏挤压器显著提高冠状循环灌注压，后者为前者的两倍，表明只有扁平挤压器能符合设计要求，其血流动力学效益应归因于有效的心脏挤压作用。

It was proved that using flat ITHP , coronary perfusion pressure was twice as high as that using spherical ITHP . The results indicate that only flat ITHP could satisfy our requirement of the design , and its hemodynamic benefit might be attributed to its effective cardiac compression .

结果表明，增加大高径比铸件挤压铸造的比压、提高铸型的预热温度不能有效地减少铸件内的缩松缺陷；

The experimental and simulated results show that increasing squeeze force , or enhancing temperature of the mold cannot reduce the porosities in the castings .