论文部分内容阅读
针对应用于高温工作环境的金属橡胶的热稳定性问题,结合其冷态成型工艺特征,提出通过去应力退火消除加工残余应力、稳定高温性能的金属橡胶热处理工艺,并以高温合金GH4169制备的金属橡胶为例,通过试验对比研究了热处理工艺对其力学性能的影响.结果表明,去应力退火工艺使金属橡胶构件的刚度提高1.5倍以上,但是对损耗因子几乎没有影响.经过退火处理的金属橡胶构件在高温工作环境下具有稳定的刚度和阻尼性能,并且刚度和阻尼的变化规律受安装约束条件影响.而未经热处理的金属橡胶构件在高温工作条件下将偏离几何尺寸及力学性能的初始设计值.因此,应用于高温环境的金属橡胶阻尼构件为了满足初始设计的力学性能并保持稳定,有必要进行合理的热处理.
Aiming at the problem of thermal stability of metal rubber applied to high temperature working environment and combining with the characteristics of its cold forming process, a heat treatment process of metal rubber to eliminate residual stress and stabilize high temperature performance through stress relief annealing was proposed. Metallic material prepared by superalloy GH4169 Rubber as an example, the effects of heat treatment process on its mechanical properties were studied through experiments.The results showed that the stress-relief annealing process increased the stiffness of metal rubber components by more than 1.5 times, but had little effect on the loss factor.After annealing the metal rubber The components have stable stiffness and damping performance under high temperature working conditions, and the variation rules of rigidity and damping are affected by the installation constraints, while the original design of the metal rubber without heat treatment will deviate from the geometric dimensions and mechanical properties under high temperature working conditions Therefore, the metal rubber damping member applied to a high-temperature environment is required to be heat-treated reasonably in order to satisfy the initial design mechanical properties and to maintain stability.