模锻

All damnification influences severely life of die.

这些损伤严重影响锻模的寿命。

The models of decalescence and heat-lossing are established.

为了得到锻模的热平衡状态，提出试探法的新思路求解最佳工作节拍。

It is concluded that disablement of die is mainly by temperature stress and disablement form is mainly plastic and thermal fatigue disablement from data of stress.

根据应力场的数据，得出结论：锻模的失效主要是温度应力引起的，其失效形式主要是塑变失效和热疲劳失效。

New technology and essentials in die design for upset ting drill key on a universal press was introduced.

介绍了在通用冲床上镦锻钻头钥匙的新工艺和模具设计要点，并给出了实用的模具结

A layer of dry lubricant is applied on the inner surface of a cavity within a forging die of a forging press of the present invention.

干膜润滑剂层施用于本发明的锻压机锻模内腔体的内表面上，还可以施用在锻压机冲头的外表面上。

Inconel751 alloy is used to produce valve of heavy-duty engine by the electrical upsetting and press forging technology which is very complex.

生产大功率内燃机用Inconel751合金气门的电镦加模锻工艺十分复杂，与传统的自由锻相比，该工艺大大提高了生产效率和成材率。

The results prove that using the laser power P=1.7Kw, scanning velocity V=4mm/s, spot diameter D=3mm, cladding thickness T=0.6mm, 50%: 50% Ni60:Ni-Cr-Cr_3C_2 as laser cladding process can obtain the laser coating with lubricous tight surface, tiny dilution rate ,fining microstructure and higher micro hardness and fine metallurgical-bonding Interface.

试验结果最终证明，激光熔覆工艺参数对熔覆层的宏观形貌、微观组织及涂层性能有极大的影响，在激光熔覆工艺参数为功率P=7Kw，速度Vs=5mm/S光斑直径D=3mm，厚度T=0.6mm，50%；50%的Ni60；Ni-Cr-Cr_3C_2的条件下，所得到熔覆层表面光滑致密、组织细小均匀、稀释率小、硬度高且与基体实现了良好的冶金结合，证明这种方法是一种在提高热锻模寿命方面有前途的方法。

By the analysis and comparison of upsetting extrusion and cold forging technology,the upsetting extrusion technology on the countersunk square neck bolt is introduced in the paper.

通过两种工艺方案中成型凹模受力情况的分析比较，说明用镦挤工艺生产沉头方颈螺栓，可降低镦锻力，提高模具寿命，保证零件质

3D-CTM (Coupled Thermo-Mechanical Forming Simulation) software for precision forging process of aero-engine blade was developed. The key technologies of 3D coupled rigid-viscoplastic thermo-mechanical FEM simulation of blade forging process were studied systematically. By using the remeshing method of contracting from the boundary to the inner, new mesh system from old distorted mesh system can be obtained. A method of modifying the position of nodes touching on the die according to its original normal was proposed to avoid "dead lock" problem due to uncontinuity of normal of scatted die meshes. The pseudo-static iterative algorithm was used to simplify the coupled thermo-mechanical computation. In particular, formulations to determine relaxation factor β was established for rigid viscoplastic FEM adopting penalty function method, and an improved cubic factor rapid algorithm derived from these formulations was proposed by combining with the advantage of advance and retreat search method.

采用基于边界构形的内缩法，实现了三维畸变网格的重新划分；提出了初矢修正法对触模节点的位置进行修正，解决了由于离散的模具网格的法矢不连续造成的&死锁&问题；采用准静态迭代法简化了速度场和温度场耦合计算过程；特别是针对减速因子β的选取，建立了适用于三维复杂成形过程刚粘塑性罚函数法有限元三次因子法的计算公式，并结合进退搜索法提出了改进的三次因子快速算法，提高了模拟计算效率和稳定性，在此基础之上，开发了面向叶片精锻过程的三维刚粘塑性热力耦合有限元模拟分析系统(3D-CTM)，系统的可靠性得到了圆柱体镦粗的验证。

And we have found the relationship between the combined stress of forging die and elastic module of its material.

因此，深入研究锻模材料的力学性能变化对其温度场和应力场的影响，具有重要的意义。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。