TA15粉末冶金产品热等静压成形工艺过程的数值模拟

针对高品质粉末冶金新产品的研发,为了减少其研发周期、降低试验成本,采用Marc模拟软件,对轴承座产品的热等静压近净成形过程进行了有限元数值模拟。结果表明:经工艺成形后,产品几何外形尺寸变化较大,相对密度整体达到0.98,局部尖端位置相对密度仅为0.85,对此提出了改进包套结构和芯模结构形式、局部增加装粉量等方案,提高局部位置致密度,保证产品整体质量,为产品的实际生产提供了理论指导作用。

Numerical Simulation of Hot Isostatic Pressing for TA15 Titanium Alloy Powder Product

In order to reduce development cycle and test costs of high quality powder metallurgy new products, hip near net-shape forming process of bushing bearing was simulated by Marc. The results show that product geometric dimensions change greatly and the relative density reached 0.98,the local tip position relative density is only 0.85 by the process of forming. In order to improve the local position density and ensure the overall quality of the product, an improvement program by improving the capsule and mold structure, the local increasing in the amount of powder is proposed. The result has provided theoretical guidance for the actual production by numerical simulation.