阿里巴巴出现不锈钢铸件尺寸缺陷的因素：
Factors leading to dimensional defects in stainless steel castings:
1、铸件材质的影响：
1. The impact of casting material:
a、材料中含碳量越高，线收缩率越小，含碳量越低，线收缩率越大。b、常见材质的铸造收缩率如下：铸造收缩率K=(LM-LJ)/LJ，LM为型腔尺寸，LJ为铸件尺寸。
a. The higher the carbon content in the material, the smaller the linear shrinkage rate. The lower the carbon content, the greater the linear shrinkage rate. b. The casting shrinkage rate of common materials is as follows: casting shrinkage rate K=(LM LJ)/LJ, LM is the cavity size, and LJ is the casting size.
2、制壳材料的影响：
2. The impact of shell making materials:
采用锆英砂、锆英粉、上店砂、上店粉，因其膨胀系数小，仅为4.6×10-6/℃，可以忽略不计。
Using zircon sand, zircon powder, Shangdian sand, and Shangdian powder, due to their small expansion coefficient, it is only 4.6 × 10-6/℃, negligible.
3、铸件结构的影响：
3. The impact of casting structure:
a、铸件壁厚，收缩率大，铸件壁薄，收缩率小。b、自由收缩率大，阻碍收缩率小。
a. The wall thickness of the casting has a high shrinkage rate, while the wall thickness of the casting is thin with a low shrinkage rate. b. The free shrinkage rate is high, while the hindrance shrinkage rate is low.
4、浇铸温度的影响：
4. The influence of casting temperature:
浇注温度越高，收缩率越大，浇注温度低，收缩率越小，因此浇注温度应适当。
The higher the pouring temperature, the greater the shrinkage rate. The lower the pouring temperature, the smaller the shrinkage rate. Therefore, the pouring temperature should be appropriate.
5、制模对铸件线收缩率的影响：
5. The effect of mold making on the linear shrinkage rate of castings:
a、射蜡温度、射蜡压力、保压时间对熔模尺寸的影响以射蜡温度较明显，其次为射蜡压力，保压时间在确定熔模成型后对熔模尺寸的影响很小。b、蜡(模)料的线收缩率约为0.9-1.1%。c、熔模存放时
a. The influence of wax injection temperature, wax injection pressure, and holding time on the size of the investment mold is more obvious in wax injection temperature, followed by wax injection pressure. The holding time has little effect on the size of the investment mold after determining the formation of the investment mold. b. The linear shrinkage rate of wax (mold) material is about 0.9-1.1%. c. During mold storage