Q:What's the density of the cast iron? The density is thin and the density is thin

There is a hot knot in the thick area, which easily causes microscopic shrinkage and makes the casting not dense. A riser may be added for shrinkage relief.

Q:What are the casting parts used to test shrinkage holes?

3 fluorescent magnetic powder, this method can also be found in part.

Q:Can the casting part be phosphating with the phosphating solution of the pickling board?

Phosphating. But it's not necessary. Because casting parts have strong corrosion resistance.

Q:Casting parts need to be subjected to the kind of heat treatment after the weldment is finished

Annealing is needed to eliminate stress and refine grain

Q:How is the silicon sol precision casting part priced? What is the price per ton of casting? Such as 304 material.

The material is usually steel material price plus the cost (per ton of 2.5-3 million, plus profit).In the Yangtze River Delta region, generally 304 casting price of about 5-5.5 million / ton.The price will be higher if the parts are complex, or a piece weighs less than 100 grams.

Q:What is the reason for 304 stainless steel precision casting parts to be changed?

Steel deformation control is one of the most common problems in the metal processing industry. Any process will occur. The casting is the largest deformation and the least fine. It is generally used to produce blank blanks

Q:Why does the surface of stainless steel casting mirror mirror ripple?

Because the grinding machine is layer by layer. And the material inside the casting is not completely uniform.

Q:The casting defects of pores, trachoma how to repair?

Metal repair can be used to fill the repair. Airhole 2mm following LT102 recommend the use of liquid metal repairing agent.

Q:Selection of hydraulic press is the casting parts and steel plate welding, how to choose?

Casting parts in one shape, the overall processing in this regard than steel plate welding better. The same price is much more expensive than steel. Large hydraulic presses seldom have casting parts.

Q:How do you mark it on the drawing? Do you need to discuss it with the manufacturer?Because the casting allowance is the standard, then, after all, is the theoretical value, the actual level depends on the manufacturer, so is it necessary to ask the manufacturer?

Casting parts do not need to provide drawings of casting blank, the casting factory according to your drawings in the required surface will be sufficient allowance, and the rest of the size according to the mechanical design manual and the casting manual can be found. The general foundry casting technology division will mark put shrinkage and the allowance of the map in your chart (usually with the red pen) for the production of wood or other material wood workers die drawings.