CN103131958A

CN103131958A - Low alloy abrasion-resistant steel

Info

Publication number: CN103131958A
Application number: CN2011103812587A
Authority: CN
Inventors: 马中亮
Original assignee: JIANGSU NANSHAN METALLURGICAL MACHINE Manufacturing Co Ltd
Current assignee: JIANGSU NANSHAN METALLURGICAL MACHINE Manufacturing Co Ltd
Priority date: 2011-11-26
Filing date: 2011-11-26
Publication date: 2013-06-05

Abstract

The invention relates to a low alloy abrasion-resistant steel, which mainly comprises elements such as C, Si, Mn and Cr, wherein chemical components of the low alloy abrasion-resistant steel comprise, by weight, 0.35-0.45% of C, 0.9-1.8% of Si, 1.5-2.5% of Mn, 1.4-2.2% of Cr, 0.0008-0.004% of B, 0.01-0.03% of Ce, less than or equal to 0.03% of P, less than or equal to 0.03% of S, and the balance of Fe. The product can obtain good abrasion resistance, high hardness and sufficient toughness under various abrasion operating conditions.

Description

Low-alloy wear-resistant steel

The present invention relates to field of alloy steel, refer more particularly to a kind of low-alloy wear-resistant steel.

Background technology:

In the industry-by-industries such as metallurgy, mine, electric power, coal, building materials and military affairs, many workpiece and equipment are because wearing and tearing were lost efficacy.Fret wear has caused a large amount of financial losses, and the financial loss that China every year causes because of wearing and tearing is more than 10,000 hundred million yuans, and only abrasive wear will consume more than 3,000 ten thousand tons of metal wear resistant materials every year.Therefore the development and application of high life high-abrasive material is related to the long-term stability development of national economy.Metal wear resistant material mainly comprises following several: (1) austenite abrasion-proof manganese steel, and this material is famous with the high tenacity sclerosis, only in the situation that impact is large, stress is high, abrasive material is hard just wear-resisting; (2) Cr series white cast iron, this material contain high chromium element, so cost is higher; (3) austempered ductile iron series wear-resistant cast iron, China also is limited to low-and-medium-grade products to the application of austempered ductile iron antifriction cast iron, does not reach the level that industrialization is produced; (4) iron and steel wearing composite material take steel as matrix metal, is made bond material with refractory carbide, obtained application in this serious wear working condition, but cost compare is high; (5) low-alloy wear-resistant steel in, has good wear resistance, can improve higher hardness and enough toughness, the alloying element content of this class steel is lower, and institute's addition element Domestic Resources is abundant, can control in the larger context the matching relationship of hardness and toughness, all can obtain wear resistance preferably under all kinds of abrasive wear operating mode bar uncles, have broad application prospects and dissemination.

Summary of the invention:

The purpose of this invention is to provide and a kind ofly all can obtain wear resistance preferably under all kinds of wear working condition conditions, the low-alloy wear-resistant steel of higher hardness and enough toughness.

The object of the present invention is achieved like this, and a kind of low-alloy wear-resistant steel is mainly by C, Si, Mn, the Cr element forms, its wear resisting steel chemical component weight per-cent is: C0.35 ~ 0.45%, and Si 0.9 ~ 1.8%, and Mn 1.5 ~ 2.5%, Cr 1.4 ~ 2.2%, B0.0008 ~ 0.004, Ce0.01 ~ 0.03, P≤0.03, S≤0.03%, all the other are Fe.

The product that the present invention produces all can obtain wear resistance preferably, higher hardness and enough toughness under all kinds of wear working condition conditions.

Embodiment:

A kind of low-alloy wear-resistant steel is mainly by C, Si, and Mn, the Cr element forms, its wear resisting steel chemical component weight per-cent is: C0.35 ~ 0.45%, and Si 0.9 ~ 1.8%, and Mn 1.5 ~ 2.5%, and Cr 1.4 ~ 2.2%, B0.0008 ~ 0.004, Ce0.01 ~ 0.03, P≤0.03, S≤0.03%, all the other are Fe.Above-mentioned wear resisting steel raw material is adopted the medium-frequency induction furnace melting, adopt the cerium inoculation (because the chemical property of rare-earth element cerium is more active, so can not add the most at first), add during general keeping warm mode before casting, rare earth can improve the as-cast structure of steel, crystal grain thinning, cleaning molten steel, rotten non-metallic inclusion improves its form and the regularity of distribution, play microalloying, improve toughness and castability.Tapping temperature 1550 ~ 1600C °, pouring temperature 1500 ~ 1530C °, 870 ~ 900C ° of oil quenchinng of heat treating castings temperature, 180 ~ 200C ° of low-temperaturetempering then, hardness value is HRC50 ~ 55, metallographic structure is martensite+austenite.

Claims

1. a low-alloy wear-resistant steel, be mainly by C, Si, Mn, the Cr element forms, and its wear resisting steel chemical component weight per-cent is: C0.35 ~ 0.45%, Si 0.9 ~ 1.8%, Mn 1.5 ~ 2.5%, and Cr 1.4 ~ 2.2%, B0.0008 ~ 0.004, Ce0.01 ~ 0.03, P≤0.03, S≤0.03%, all the other are Fe.