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常见的精密铸造缺陷

RELEASE TIME :

2019-10-09 07:59

常见的精密铸造缺陷有气泡，气泡是指精细铸件个别位置呈现润滑孔眼缺陷。气泡通常在机加工之后才干被发现。我们的精密铸造技术人员分离多年车间消费经历，对精密铸造中呈现气泡的缘由及预防办法总结如下：

一、构成缘由：
1.大多数状况下呈现气泡主要是由于精细铸外型壳焙烧不充沛，浇注钢水时型壳霎时产生大量气体无法顺利排出，进而侵入金属液中构成气泡；
2.由于制壳工艺或壳型资料缘由，型壳透气性太差，型腔中气体难以排出，进入金属液中构成气泡；
3.浇注时卷入钢水中的空气未能排出从而形成的铸件气泡。

二、预防办法
1.在精密铸造条件允许的状况下，在构造复杂的铸件高处设置排气泡。
2.在设计浇注系统时，要充沛思索到型壳排气需求。
3.型壳焙烧温度、时间要合理，保温时间也要充足。
4.脱蜡时应将蜡料彻底扫除。
5.恰当降低浇包嘴到浇口杯间隔，浇注速度要平均，以确保钢程度稳充溢型腔，尽可能少的卷入钢水中空气，以便型腔中及钢水中气体能顺利排出

In the process of casting production, the role of the casting mold is very important. The surface on which the mold cavity is in direct contact with the liquid metal is called the working surface.

2018/01/19 14:38

There are several annealing processes for wear - resistant castings

Recrystallization annealing is usually referred to as recrystallization annealing because recrystallization occurs once during heating and cooling process. This annealing method is quite common in steel.

2017/12/14 14:37

Investment casting is a revival of an ancient craft

Lost wax method casting is now called investment casting, is a little cutting or no cutting casting process, is an excellent technology in the casting industry, its application is very wide. It is not only suitable for casting of various types and alloys, but also can produce castings with higher dimensional accuracy and surface quality than other casting methods.

2017/11/10 14:23

Shandong Mingxing Metal Technology Co., LTD

Shandong mingxing metal Technology co., LTD., formerly known as xintai xiaogang coal mine casting steel factory, was founded in September 1995, and now has nearly 20 years of production history. The company is now located at the foot of taishan xintai high-tech development zone. Adjacent to the beijing-shanghai expressway and beijing-fuzhou expressway, convenient transportation.

2018/07/25 16:52

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Tel/Fax：+865385393589
Mob：+8615092816269
E-mail：mxcasting@163.com
Web：www.mxcasting.cn
Add：No.9 Mingxing road, Xintai city, Shandong province, China.

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