Composite cold iron for iron castings and production method thereof

• Main Authors: NA JIANHONG, SU SHAOJING, SONG LIANG, MA BINGPING
• Format: Patent
• Language: Chinese; English
• Published: 27.09.2019
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The invention relates to efficient composite cold iron for iron castings and a production method thereof. The composite cold iron comprises a main body; the main body comprises a coating layer and a gray iron layer; the coating layer is prepared by adopting common carbon steel; the gray iron layer is prepared by adopting gray iron; the coating layer is of a cavity structure; the gray iron layer is matched with the coating layer; the gray iron layer is cast in a cavity of the coating layer; and a boss positioning hole is formed in the side wall of the coating layer. The composite cold iron further comprises a boss for preventing slippage; and the shape and the size of the boss positioning hole are matched with that of a projection part of the boss. The production of positioning grooves by steel cold iron in the prior art is high in cost; the cold iron slips due to improper production to cause the casting waste; the steel cold iron is high in material cost; and in order to solve the defects in the prior art, th