The quality of furan sand castings is usually better than clay sand castings, however, some defects are also very easy t摘要呋喃树脂砂铸件质量一般比黏土砂铸件好，但如果原材料选择、工艺设计、造型和制芯操作不当，也会产生气孔、粘砂、脉纹、裂纹，夹渣、硬度不足、渗碳、渗硫和球化不良等铸造缺陷。