Archives

Prevention method of porosity in cast iron

Cast iron castings often have various casting defects. How to prevent these defects has always been the concern of casting manufacturers. This paper introduces the author’s knowledge and practical experience in this field. Characteristics of casting porosity: porosity in casting refers to the smooth pores with different sizes existing...

spacer

Analysis of common defects in castings

Casting porosity This is a small cavity formed by the gas which can not escape during the solidification of metal. The inner wall of the cavity is smooth and contains gas. It has a high reflectivity to the ultrasonic wave. However, because it is basically spherical or ellipsoidal, that...

spacer
spacer
spacer
spacer
spacer

Internal casting defects of die casting (part 1)

1 Casting porosity (1) Features and inspection methods: After dissection, appearance inspection or flaw detection showed that the pores had smooth surface and round shape. (2) Causes: ① The introduction direction of the alloy liquid is unreasonable or the flow speed of the metal liquid is too high, resulting...

spacer