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利用CuO/Al体系超重力熔铸钨铜复合材料,采用ANSYS有限元软件,提出一种先微单元、再整体而后微单元的模拟方法,对其成型过程中的温度、应力场进行仿真模拟并进行显微组织观察分析,结果表明:超重力场熔铸可形成非平衡结晶条件,高温低黏度铜溶液超重力场作用下快速填充钨颗粒压块孔隙,形成极高冷却速度(>100000℃/s),产生较大的应力,压块内的钨颗粒表面升温速度较快,其瞬时等效应力值可达5 GPa,使得颗粒表面爆裂而钝化,烧结能力及质量得到提高,随着温度降低,钨铜两相应力值逐渐降低,温度测量及显微组织研究结果验证了仿真模拟结果的可靠性。
The CuO / Al system was used to simulate and simulate the temperature and stress field in the process of forming the tungsten-copper composite by means of ANSYS finite element software, and then to simulate the micro-unit, then the whole and then the micro-unit. The results show that non-equilibrium crystallization conditions can be formed by melt casting in super gravity field, and the pores of tungsten particle compact are rapidly filled under the super gravity field of high temperature and low viscosity copper solution to form extremely high cooling rate (> 100000 ℃ / s) , Resulting in greater stress, tungsten particles in the compact block surface heating rate faster, the instantaneous equivalent stress of up to 5 GPa, making the particle surface burst passivation, sintering ability and quality are improved, with the temperature decreases, Tungsten and copper stress gradually decreased, the temperature measurement and microstructure results verify the simulation results of the reliability.