A low chromium alloy wear-resistant steel ball with a composite wear-resistant layer and its manufacturing method

Abstract

The invention discloses a low-chromium alloy wear-resistant steel ball with a compound wear-resistant layer and a manufacturing method thereof, and relates to the technical field of wear-resistant steel ball manufacturing. The low-chromium wear-resistant steel ball comprises a carbon steel matrix and low-chromium cast iron, and the low-chromium cast iron comprises the following components of, by weight, 3.6% of C, 0.12% of Cr, 0.9% of Mn, 0.78% of Si, 0.05% of Ti, less than 0.02% of P, less than 0.01% of S, 0.008% of B, 0.49% of Cu, 0.13% of Mo, 0.16% of V, 0.08% of Re, 0.14% of rare earth elements, 0.11% of alkaline earth elements and the balance Fe. According to the low-chromium alloy wear-resistant steel ball with the compound wear-resistant layer and the manufacturing method thereof, alow-chromium cast iron layer is compounded on a carbon base material according to a permeation composite principle, so that the service life of the wear-resistant steel ball is prolonged, wear-resistant performance is improved, the ball breakage rate is reduced, the non-circularity rate is reduced, meanwhile, the defect that toughness is insufficient is overcome, and mechanical property and anti-fatigue performance of the wear-resistant steel ball are improved.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant steel ball manufacturing, and in particular relates to a low-chromium alloy wear-resistant steel ball with a composite wear-resistant layer and a manufacturing method thereof. Background technique [0002] With the rapid development of science and technology and modern industry, the operating speed of mechanical equipment is getting higher and higher, and the speed of friction parts is getting faster and faster, and its service life is becoming more and more affecting modern equipment, especially high-speed operation An important factor in the production efficiency of the automatic production line. Although material wear rarely causes catastrophic damage to metal workpieces, the resulting energy and material consumption is staggering. At present, the most widely used wear-resistant steel balls in metal mines, cement, power systems and other industries are mostly made of chromium-based allo...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a low-chromium alloy wear-resistant steel ball with a composite wear-resistant layer and its manufacturing method. By adopting the principle of infiltration and compounding on the carbon steel substrate to compound a layer of low-chromium cast iron layer, the existing problems are solved. Wear-resistant steel balls have short service life, poor wear resistance, high broken ball rate, and high out-of-round rate