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利用SYSWELD软件对304不锈钢激光熔覆成形过程的温度场及应力-应变场进行数值模拟。在304不锈钢基板材料上熔覆钴基合金,模拟铺粉式单层多道搭接激光熔覆成形在不同扫描路径下的温度场及应力-应变场的变化情况,从而优化激光熔覆工艺参数。结果表明,在相同熔覆工艺参数的情况下,以平行线扫描方式中的长边螺旋扫描路径进行激光熔覆时,产生的热影响区、残余应力、曲翘变形等相对较小,温度梯度及整体位移量也很小,使激光熔覆的工艺性能得到改善。
The temperature field and stress-strain field of 304 stainless steel during laser cladding are simulated by SYSWELD software. Cobalt-based alloy was deposited on 304 stainless steel substrate to simulate the changes of temperature field and stress-strain field under different scanning paths in a single-layer multi-lap lap cladding laser cladding process to optimize the laser cladding process parameters . The results show that the heat affected zone, residual stress and warp deformation are relatively small when the laser cladding is carried out by the long-side helical scanning path in the parallel line scanning mode under the same cladding process parameters. The temperature gradient And the overall displacement is also small, the laser cladding process performance is improved.