CN103736548A

CN103736548A - Cast iron alloy roller ring with high wear resistance

Info

Publication number: CN103736548A
Application number: CN201310755194.1A
Authority: CN
Inventors: 黄忠波
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-27
Filing date: 2013-12-27
Publication date: 2014-04-23

Abstract

The invention relates to a cast iron alloy roller ring with high wear resistance. The cast iron alloy roller ring comprises a composite structure formed by an inner layer and an outer layer, wherein the inner layer is made from high-strength ordinary nodular cast iron; the outer layer is made from chromium-tungsten alloy cast iron. Cast iron alloy is produced by the technical scheme of the invention, so that the problem of contradiction between high wear resistance and high robustness can be solved, and the quality of products using the alloy is improved.

Description

A kind of high-wearing feature cast-iron alloy roller circle

Technical field

The invention belongs to cast-iron alloy field, specifically refer to that one has high-wearing feature, low internal stress, high tenacity, and there is the cast-iron alloy roller circle in higher service life.

Background technology

For the roller circle on the plant equipment double-roll type pulverizer of the hard solid piece material fragmentations such as gangue and small stone stone or pulverizing, it is a vitals, the material of this roller circle be have necessarily required, require it to there is high-wearing feature, low internal stress, high tenacity, and there is higher service life.For the outer field problem of materials of antiwear composite pair roller circle, there is more material optional, also can be indicated in Patent document data.

But in actual use, above-mentioned material also cannot reach perfect condition on anti-wear performance, and some material can be realized anti-wear performance, but in material, include a large amount of noble metals or rare metal, the cost of material is higher.

Summary of the invention

The object of the present invention is to provide a kind of high-wearing feature, low internal stress, high tenacity, high service life, and there is the cast iron alloy material of the more excellent ratio of performance to price.

The present invention is achieved by the following technical solutions:

A kind of high-wearing feature cast-iron alloy roller circle, includes internal layer and the outer composite construction forming; Described inner layer material is high-strength common spheroidal graphite cast-iron; Cladding material is for containing chromium tungsten alloy cast iron; Described containing chromium tungsten alloy cast iron, its composition is by weight percentage, cerium and the lanthanum rare earth of the boron of the carbon of the chromium of 5-8%, the tungsten of 0.5-1.0%, 2.5-3.5%, the manganese of 0.5-1.2%, 0.3-0.5%, the silicon of 1.5-1.8%, 0.05-0.08%, surplus is iron and inevitable impurity.

Described containing chromium tungsten alloy cast iron, its composition also includes the vanadium of 0.05-0.1% and the aluminium of 0.1-0.3% by weight percentage.

The invention has the beneficial effects as follows:

The cast-iron alloy that technical scheme of the present invention is produced can solve the contradictory problems of high-wearing feature and high-strength tenacity, has improved the product quality of applying this alloy.

The specific embodiment

The manufacture method of high-wearing feature cast-iron alloy roller circle is:

Determine and the design structure of composite anti-wear roll ring and the chemical composition of material: the structure of composite anti-wear roll ring is internal layer and the outer composite construction forming; Inner layer material is high-strength common spheroidal graphite cast-iron; Cladding material is for containing chromium tungsten alloy cast iron; Described containing chromium tungsten alloy cast iron, its composition is by weight percentage, cerium and the lanthanum rare earth of the boron of the carbon of the chromium of 5-8%, the tungsten of 0.5-1.0%, 2.5-3.5%, the manganese of 0.5-1.2%, 0.3-0.5%, the silicon of 1.5-1.8%, 0.05-0.08%, surplus is iron and inevitable impurity;

Carry out composite centrifugal casting: with intermediate frequency furnace or arc melting above-mentioned containing chromium tungsten alloy cast iron and spheroidal graphite cast-iron; Adopt centrifugal casting technique, opening mould temperature while watering is 220～280 ℃, and containing opening of chromium tungsten alloy cast iron, watering temperature is 1350～1450 ℃ of constant temperature casting, containing chromium tungsten alloy cast iron, pours into and adds covering slag, has then watered all containing chromium tungsten alloy cast iron; Be incubated after 15-30 minute, constant temperature is at the uniform velocity cooling, and cooling velocity is no more than 8 ℃/sec; After being cooled to 850～1000 ℃, its surface temperature pours into spheroidal graphite cast-iron; It is 1300～1400 ℃ that the opening of spheroidal graphite cast-iron watered temperature; After solidifying completely, spheroidal graphite cast-iron shuts down;

Heat-treat: by the above-mentioned composite roll circle demoulding making, at the uniform velocity air-cooled to air-cooled to 350～450 ℃ after being incubated 0.5-1 hour after 550 ℃-600 ℃ with 3-5 ℃/sec subsequently, carry out quenching liquid constant temperature Quenching Treatment, then put into the tempering furnace that is preheating to 350～450 ℃, be warming up to 380～500 ℃, and keep 4 hours, then cool to room temperature with the furnace and come out of the stove.

Embodiment 1

Containing chromium tungsten alloy cast iron, its composition is by weight percentage, 8% chromium, 1.0% tungsten, 3.5% carbon, 1.2% manganese, 0.5% boron, 1.8% silicon, 0.08% cerium and lanthanum rare earth, 0.1% vanadium and 0.3% aluminium, surplus is iron and inevitable impurity.

Embodiment 2

Containing chromium tungsten alloy cast iron, its composition is by weight percentage, 5% chromium, 0.5% tungsten, 2.5% carbon, 0.5% manganese, 0.3% boron, 1.5% silicon, 0.05% cerium and lanthanum rare earth, and surplus is iron and inevitable impurity.

Embodiment 3

Containing chromium tungsten alloy cast iron, its composition is by weight percentage, 6.5% chromium, 0.8% tungsten, 3.0% carbon, 1.0% manganese, 0.35% boron, 1.6% silicon, 0.06% cerium and lanthanum rare earth, 0.085% vanadium and 0.15% aluminium, surplus is iron and inevitable impurity.

Claims

1. a high-wearing feature cast-iron alloy roller circle, is characterized in that: include internal layer and the outer composite construction forming; Described inner layer material is high-strength common spheroidal graphite cast-iron; Cladding material is for containing chromium tungsten alloy cast iron; Described containing chromium tungsten alloy cast iron, its composition is by weight percentage, cerium and the lanthanum rare earth of the boron of the carbon of the chromium of 5-8%, the tungsten of 0.5-1.0%, 2.5-3.5%, the manganese of 0.5-1.2%, 0.3-0.5%, the silicon of 1.5-1.8%, 0.05-0.08%, surplus is iron and inevitable impurity.

2. according to claim 1 containing chromium tungsten alloy cast iron, its composition also includes the vanadium of 0.05-0.1% and the aluminium of 0.1-0.3% by weight percentage.