在锻造过程中先将金属加热，然后施加合适的压力使其塑性变形。
Forging is the process by which metal is heated and is shaped by plastic deformation by suitably applying compressive force.
齿轮锻造成形是一个复杂的塑性大变形过程。
The gear forging formation is a complicated and large plastic deforming process.
利用有限元软件模拟了V型砧的锻造拔长过程，并对不同夹角的V型砧压下后锻坯塑性变形区内应力、应变的状态进行比较。
The V-anvil drawing process of large forgings was simulated using FE software, and the stress-strain distributions in the plastically deforming area were compared after different V-anvils drawings.
本文的研究结果为实现粉末高温合金盘件超塑性等温锻造奠定了基础。
The work in this paper can provide useful information for isothermal forging process of P/M superalloy turbine disk.
研究这些合金的超塑性能，对采用超塑性等温锻造方法制造复杂形状锻件具有重要意义。
It is of great significance to research on the superplastic properties of these alloys for using superplastic isothermal forging to manufacture complex forge pieces.
研究这些合金的晶粒细化和超塑性能，对采用超塑性等温锻造方法制造复杂形状航空锻件具有重要意义。
Therefore, it is of great significance to research the superplastic properties of these alloys for using superplastic isothermal forging to manufacture complex aviatic forge pieces.
通过采取相应措施防止氧化，以提高钛合金超塑性变形的性能，确保钛合金等温锻造质量。
Thus the efficient measure of preventing from oxidization was introduced to improve the superplastic deformation and quality of isothermal forging for titanium alloy.
目前，在锻造等热塑性成形生成过程中常采用快速加热和介质保护加热等方式来减少和防止坯料在加热过程中的氧化。
At present, quick heating or medium protected heating to reduce or prevent oxidation during heating are often used in the process of thermo-plastic forming such as forging.
锻造成形机理非常复杂，数值模拟是目前塑性成形分析最有效的方法。
Forging mechanism is very complicated, and numerical simulation is the most effective method for plastic deformation analysis.
此文用塑性泥作模拟材料，进行了压扭复合锻造和不对称V型砧拔长的工艺实验。
The experiments of twist-compression forging and unsymmetrical V-shape die forging are made using plasticine.
室温和高温拉伸强度随锻造火次的增加呈现先减少后增加的趋势，塑性则先增加后减小。
At room temperature and high temperature the tensile strength of the forging decreases firstly and then increases while the ductility changes on the contrary.
本文在锻造新工艺理论与技术的指导下，应用三维弹塑性有限元研究了拔长和倒棱工序。
Guided by the new forging theories and technologies, 3d elastoplastic FEM is applied to research of stretching and chamfering.
结果表明：当锻造产生了白点和过热缺陷时，牙轮牙爪的力学性能明显下降，尤其是塑性指标和冲击韧度降低明显。
It is of vital process step that the temperature of rolled products when inceptively charged into soaking pit for preventing steel from having flakes and internal crack, etc.
平砧锻造是塑性大变形问题，本文采用随动坐标系跟踪流动质点，利用能量法分步计算质点位移增量、等效应变场等，然后叠加。
To improve the accuracy of large floating point number calculatation, an iterative approach of inverse transformation for Gauss projection with floating coordinate system is presented.
平砧锻造是塑性大变形问题，本文采用随动坐标系跟踪流动质点，利用能量法分步计算质点位移增量、等效应变场等，然后叠加。
To improve the accuracy of large floating point number calculatation, an iterative approach of inverse transformation for Gauss projection with floating coordinate system is presented.
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