Gray pig iron with good mechanical property and cutting machining property

Abstract

Gray cast iron with good mechanical properties and machinability belongs to the field of powder metallurgy technology, and is composed of the following raw materials in mass percentages, C 4.2%-6.77%, Si 2.5%-3.8%, Mn 1.05%-1.55%, P 0.05- 0.128%, S 0.125%~0.625%, Cr 0.45%~0.85%, Cu 0.62%~0.98%, Sn 0.07~0.12%, Sb 0.02%, Ni 0.77%, W 1.2%, and the balance is pure iron and impurities. The problem of large shrinkage tendency of gray cast iron products is solved. The gray cast iron produced by the gray cast iron production method of the present invention has the characteristics of no shrinkage cavity and high yield, and can meet special occasions such as high performance and good cutting performance.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy and relates to a gray cast iron, in particular to a gray cast iron with good mechanical properties and cutting performance. Background technique [0002] Cast iron is a general term for alloys mainly composed of iron, carbon and silicon. Cast iron can be divided into: gray cast iron, white cast iron, malleable cast iron, nodular cast iron, vermicular cast iron and alloy cast iron. [0003] Alloy cast iron is obtained by adding appropriate amount of alloying elements (such as silicon, manganese, phosphorus, nickel, chromium, molybdenum, copper, aluminum, boron, vanadium, tin, etc.) to ordinary cast iron. Alloying elements change the matrix structure of cast iron, so that it has corresponding properties such as heat resistance, wear resistance, corrosion resistance, low temperature resistance or non-magnetic properties. Among them, gray cast iron in alloy cast iron is the most widely use...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at solving the shortcomings of traditional gray iron castings such as poor fluidity and low wear resistance in the casting process, and provides a gray cast iron with good mechanical properties and cutting performance without adding additional processing procedures and processing Under the condition of low cost, high wear resistance can be obtained, which can meet the use of high-demand occasions