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Development process of cast stainless steel

RELEASE TIME :

2018-01-19 14:38

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.

The quality of the mold is largely determined by the quality of the working surface, as a series of physical and chemical interactions occur at the interface between the liquid metal and the working surface during the pouring and solidification of the liquid metal.

Under unfavorable conditions, the interaction between the casting mold and the liquid metal at the interface will result in rough surface of the casting, and even produce defects such as sticky sand, sand holes and pitting.

Now for the production of casting stainless steel, general manufacturers use is quartz sodium silicate sand, quartz resin sand, of course, there are special products for the use of chromite sodium silicate sand, zirconium resin sand, etc..

Coating the surface of sand mold and sand core can improve the surface strength and anti-sand adhesion ability. It is one of the effective measures to prevent the defects of sand adhesion, sand inclusion and sand hole, obtain the surface smooth casting, reduce sand falling, and reduce the amount of labor of casting cleaning.

In particular, some large steel casting sand problem is often solved by coating. Therefore, coating is very important for the surface quality of castings.

Coating should have good anti - sticky sand, and good technology, such as stability coating, room temperature strength, high temperature strength and crack resistance. Coating should have good besmear to brush a gender, ability is even ground adhesion is mixed in the surface of arenaceous core.

It also has sufficient strength and thermal stability, i.e. high fire resistance and chemical inertness. These properties of coating are to rely on the performance of raw materials, reasonable selection of formula, and the correct preparation process and use process to ensure. Sodium silicate binder is water soluble, therefore, the sodium silicate sand mold and sand core and water-based paint does not adapt, hardening of the sodium silicate sand, sand core coating, water-based paint, paint the water will into the hardened waterglass sand type, core, after being absorbed to soften sand mold and core, thereby reducing the surface of the sand mold and core strength. Therefore, it should be said that the use of alcohol - based stainless steel sand coating.

Resin sand in the process of operation itself has a toxic problem, from the point of view of the operator's health and problems, from the point of view of reducing the cost of coating, from the point of view of burning alcohol-based coating somewhat destroy resin sand surface strength, should use water-based stainless steel coating.

1. The stainless steel three-way material should be placed in the closed box, the open box should be covered by canvas, and the end of the pipe should be sealed by plastic cover.

2018/10/18 14:48

How much do you know about the failure of stainless steel pipe fittings?

With the extensive use of stainless steel pipe fittings in life, stainless steel pipe fittings has had a certain market. But at the same time, many users reported that stainless steel pipe fittings will appear when the use of the phenomenon of failure, stainless steel pipe fittings stainless steel pipe fittings failure led to work stagnation,

2018/07/13 14:46

What should be paid attention to when designing stainless steel pipe fittings

不锈钢管件的结构圆角管件壁间连接处均应有铸造圆角。没有圆角的结构，在直角处金属积聚，热节圆比别处大，易产生缩孔和缩松，且内側转角处应力集中严重，易产生裂纹。设计了阀角后，可防止产生上述缺陷。某些金属在直角处晶体宜交，产生晶体间的结合力薄弱，管件在转角处力学性能有所下降，加大了裂纹的产生。所以需将转角处设计成圆角，铸造成圆角更有利于造型，避免铸型尖角损坏而形成砂眼，减少铸件粘砂，使铸件美观等。山东明

2018/05/10 14:45

The development process of cast stainless steel is introduced in detail

Mold coating is the main component of refractory aggregate is, its ability to resist adhering sand on coating plays a decisive role, and the binder, suspending agent, thickening agent, defoaming agent, surfactant and other additives is the auxiliary material coating, decides the suspension stability of coatings, thixotropy, and intensity of flowing property

2018/02/08 14:45

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