2种材料的缩松倾向对比

Shrinkage Porosities Tendency Comparison of Two Materials

介绍了SSDI材料的技术要求,并与EN-GJS-400-18U-LT材料进行了对比。利用数值模拟软件对2种材料的热节、可能产生的缩松区域及大小进行对比,模拟结果显示:这2种材料的热节位置基本相同,但从凝固模拟结果上看,SSDI材料比EN-GJS-400-18U-LT材料的缩松倾向大。为进一步验证SSDI材料的缩松情况,进行铸件试制。通过对缩松面积较大的区域进行解剖,确定了SSDI材料比EN-GJS-400-18U-LT材料的缩松倾向大。此次对比试验,为后续的正式生产积累了丰富的经验,有利于工艺设计人员制订工艺,有效减少废品的产生。

Technical requirements of SSDI material were introduced and were compared with EN-GJS-400-18U-LT. By using numerical simulation software, two materials were compared in the respects of hotspots areas where shrinkage porosities may occur and their sizes. The simulation results showed：two materials have basically the same hot spots position,however the solidification simulation results indicated that the shrinkage porosities tendency of SSDI was more severe than EN-GJS-400- 18U-LT. The above-mentioned comp.arison accumulated abundant experience which is helpful to the casting method designer to method the jobs and thereby effectively reduce rejected castings.