用呋喃树脂砂生产薄壁铸钢件热裂纹成因的分析

New Viewpoints to the Hot Tears on the Thin Wall Steel Castings by Furan Resin Sand Process

将呋喃树脂砂工艺铸钢件上出现的热裂纹分为“缩裂纹”和“拉裂纹”。对两种裂纹的微观形貌和微区成分做了分析 ,深入探讨了两种裂纹具有的不同形成原因和形成过程 ,为采取有效对策解决裂纹问题提供了技术依据。

According to the different appearance of the hot tears,the hot tears in the thin wall steel castings were divided into two kinds:“shrinkage hot tears” and “stress hot tears”,The micro appearance of the hot tears was analyzed.Based on the results of the analysis,authors believed that two kinds of the hot tears have different forming reasons.Finally,the new viewpoints to the hot tears in thin wall steel casting were presented.