Austenite vermicular graphite cast iron material

Abstract

The invention discloses an austenite vermicular graphite cast iron material. The austenite vermicular graphite cast iron material comprises the following components in percentage by mass: carbon: 2.2-3.0%, silicon: 2.0-3.1%, manganese: 0.5-1.5%, phosphorus: <=0.08%, Sulfur: <= 0.02%, chromium: 0.9-1.8%, nickel: 12-18%, copper: 4.8-8%, cerium: 0.01-0.03%, magnesium: 0.012-0.02%, and the balance iron. The austenitic vermicular graphite cast iron material provided by the invention contains less magnesium elements, so that the wear resistance of the austenitic vermicular graphite cast iron material can be greatly improved. By detecting the performance of the austenite vermicular graphite cast iron material provided by the invention, the vermicular rate, the tensile strength and the elongationrate of the austenite vermicular graphite cast iron material are greatly improved compared with relevant performance parameters in the prior art, and the main reason is that the austenite vermicular graphite cast iron material provided by the invention is a spherical and vermicular mixed body, so that the austenite vermicular graphite cast iron material has the advantages of tensile strength of aspherical cast iron material and high vermicular rate and elongation rate of a vermicular cast iron material.

Description

technical field [0001] The invention relates to the technical field of cast iron, in particular to an austenitic vermicular graphite cast iron material. Background technique [0002] The piston is the "heart" of the automobile engine, which bears alternating mechanical loads and thermal loads, and is one of the key components in the engine with the worst working conditions. One of the main factors affecting the service life of aluminum alloy pistons is the wear of piston ring grooves, especially the first ring groove. [0003] In order to improve the wear resistance of the first ring groove of the aluminum piston, cast iron wear-resistant ring seat (insert ring) is generally used in the industry as an effective solution. This ring-inlaid piston not only maintains the light weight of the aluminum piston, but also Combined with the advantages of wear-resistant cast iron piston ring grooves, the service life of aluminum pistons is greatly improved, and ring-mounted aluminum pi...

AI Technical Summary

Problems solved by technology

With the implementation of the National Sixth Standard, the temperature resistance and pressure resistance of the existing aluminum pistons have been significantly improved. Due to the limited heat resistance and tensile strength of the currently used nickel-based austenitic gray cast iron inserts, the failure rate of the installed machine has been greatly increased. fulfil requirements

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