High-strength high-toughness winch nodular cast iron winding drum and casting method thereof

Abstract

The invention discloses a high-strength high-toughness winch nodular cast iron winding drum and a casting method of the high-strength high-toughness winch nodular cast iron winding drum. The high-strength high-toughness winch nodular cast iron winding drum mainly comprises the following chemical components in percent by mass: 3.4-3.7 percent of C, 2.1-2.4 percent of Si, 0.03-0.06 percent of Mg, 0.02-0.04 percent of Y, 0.006-0.012 percent of Sn, 0.012-0.018 percent of Sb, 0.02-0.04 percent of RE, 0.035-0.060 percent of N, 0.040-0.065 percent of V, 0.040-0.065 percent of Nb, 0.005-0.010 percent of Ca, 0.005-0.010 percent of Ba and 0.15-0.24 percent of Mn. A few alloying elements are added into the nodular cast iron, and the aims of thinning the solidification structure, improving the graphite form and distribution, improving the strength and toughness and prolonging the service life of the winding drum are achieved through nodulizing, inoculation and annealing.

Description

technical field [0001] The invention relates to a high-strength and high-toughness hoist ductile iron reel and a casting method thereof, belonging to the technical field of casting. Background technique [0002] The winch reducer is widely used in various lifting equipment. The drum is the main part of the hoist reducer and one of the important parts of the crane. Since the wire rope is wound on the drum after assembly, the drum directly bears the load. Therefore, the quality of the drum itself plays a vital role in the safe operation of the crane. With the large-scale development of modern engineering, the lifting weight and lift have increased greatly, which puts forward new and higher requirements for the material and structure of the drum. In addition, the working surface of the reel bears a lot of extrusion stress and shear stress during work, which requires the working surface to have high hardness, strength and toughness. [0003] Drum materials currently mainly inc...

AI Technical Summary

Problems solved by technology

However, its technical difficulty is very high, and it is necessary to ensure high surface quality and avoid defects such as shrinkage porosity, subcutaneous pores, and surface ash layer.

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