CN102978510A

CN102978510A - Spheroidal graphite cast iron alloy

Info

Publication number: CN102978510A
Application number: CN2012105075325A
Authority: CN
Inventors: 俞虹
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-26
Filing date: 2012-11-26
Publication date: 2013-03-20

Abstract

The invention relates to a spheroidal graphite cast iron alloy which comprises the following components in percent by weight: 3.2-3.3 percent of carbon, 2.8-3.0 percent of silicon, 0.03-0.04 percent of magnesium, 0.01-0.025 percent of chromium, 0.005-0.01 percent of aluminum, 0.005-0.01 percent of boron, 0.6-0.8 percent of manganese, 0.08-0.12 percent of copper, 0.01-0.02 percent of vanadium, less than 0.1 percent of impurities and the balance of iron. According to the spheroidal graphite cast iron alloy, the high-temperature resistance is improved, and the application range is enlarged.

Description

Nodular cast iron alloy

Technical field

The invention belongs to the cast iron alloy field, refer to especially a kind of nodular cast iron alloy.

Background technology

In automobile or mechanical manufacturing field, use cast iron alloy and prepare parts or the baroque parts with high-wear resistance.Use cast iron alloy can reduce the difficulty of processing with casting technique, reduce production costs.But it is exactly in use that cast iron alloy has a defective, and heat-resisting ability is limited, and under high-temperature condition, ruckbildung can occur cast iron alloy, and generally speaking, the optimal temperature of cast iron alloy is lower than 350 ℃.But parts such as retarding disc at cast iron alloy, it is in braking procedure, can produce 800-900 ℃ high temperature in the part by friction, not only the wear and tear coating of retarding disc of such result, cause retarding disc coating distortion, the performance of retarding disc is exerted an influence, therefore, retarding disc must be changed in use for some time, and this has caused the raising of cost.

Summary of the invention

The purpose of this invention is to provide a kind of nodular cast iron alloy technology, by the technical program, when guaranteeing wear resistance, the stability of structure increases the service life when having improved high temperature.

The present invention is achieved by the following technical solutions:

Nodular cast iron alloy, be by weight percentage, the vanadium of the manganese of the aluminium of the magnesium of the carbon of 3.2-3.3%, the silicon of 2.8-3.0%, 0.03-0.04%, the chromium of 0.01-0.025%, 0.005-0.01%, the boron of 0.005-0.01%, 0.6-0.8%, the copper of 0.08-0.12%, 0.01-0.02%, be lower than 0.1% impurity, surplus is iron.

The beneficial effect that the present invention compares with prior art is:

By having added v element in the technical program, improved the resistance to elevated temperatures of cast iron alloy, enlarged the range of application of cast iron alloy.

Embodiment

Describe by the following examples concrete technical scheme of the present invention in detail, should be understood that, following embodiment only can be used for explaining the present invention and can not be interpreted as to be limitation of the present invention.

The preparation method is:

Batching, be by weight percentage, the vanadium of the manganese of the aluminium of the magnesium of the carbon of 3.2-3.3%, the silicon of 2.8-3.0%, 0.03-0.04%, the chromium of 0.01-0.025%, 0.005-0.01%, the boron of 0.005-0.01%, 0.6-0.8%, the copper of 0.08-0.12%, 0.01-0.02%, be lower than 0.1% impurity, surplus is that iron is prepared burden;

Melting is smelted into liquid with above-mentioned batching at 1250-1280 ℃, wait through removing slag refining after 1180-1200 ℃ be incubated 1-2 hour and breed;

Casting, with solution carry out constant temperature casting then at the uniform velocity cooling make blank, cooling rate maintains 0.5-1 ℃/second to 150-180 ℃;

Thermal treatment, with the blank after the cooling put into 750-780 ℃ quenching furnance insulation after 2-4 hour salt bath constant temperature be quenched to 300-400 ℃, and then insulation after 1-2 hour constant temperature be quenched to 130-150 ℃;

Tempering, insulation was cooled to room temperature after 2-4 hour in 180-200 ℃ tempering stove.

Embodiment 1

The preparation method is:

Batching, be by weight percentage, 3.2% carbon, 2.8% silicon, 0.03% magnesium, 0.01% chromium, 0.005% aluminium, 0.005% boron, 0.6% manganese, 0.08% copper, 0.01% vanadium, be lower than 0.1% impurity, surplus is that iron is prepared burden;

Melting is smelted into liquid with above-mentioned batching at 1250-1280 ℃, wait through removing slag refining after 1180-1200 ℃ be incubated 1.5 hours and breed;

Thermal treatment, with the blank after the cooling put into 750-780 ℃ quenching furnance insulation after 2 hours salt bath constant temperature be quenched to 300-400 ℃, and then constant temperature is quenched to 130-150 ℃ after being incubated 1 hour;

Tempering, insulation was cooled to room temperature after 3 hours in 180-200 ℃ tempering stove.

Embodiment 2

The preparation method is:

Batching, be by weight percentage, 3.3% carbon, 3.0% silicon, 0.04% magnesium, 0.025% chromium, 0.01% aluminium, 0.01% boron, 0.8% manganese, 0.12% copper, 0.02% vanadium, be lower than 0.1% impurity, surplus is that iron is prepared burden;

Melting is smelted into liquid with above-mentioned batching at 1250-1280 ℃, wait through removing slag refining after 1180-1200 ℃ be incubated 2 hours and breed;

Thermal treatment, with the blank after the cooling put into 750-780 ℃ quenching furnance insulation after 2.5 hours salt bath constant temperature be quenched to 300-400 ℃, and then constant temperature is quenched to 130-150 ℃ after being incubated 1 hour;

Tempering, insulation was cooled to room temperature after 2.5 hours in 180-200 ℃ tempering stove.

Embodiment 3

The preparation method is:

Batching, be by weight percentage, 3.22% carbon, 2.85% silicon, 0.035% magnesium, 0.02% chromium, 0.008% aluminium, 0.008% boron, 0.75% manganese, 0.092% copper, 0.015% vanadium, be lower than 0.1% impurity, surplus is that iron is prepared burden;

Thermal treatment, with the blank after the cooling put into 750-780 ℃ quenching furnance insulation after 3 hours salt bath constant temperature be quenched to 300-400 ℃, and then constant temperature is quenched to 130-150 ℃ after being incubated 1.5 hours;

Tempering, insulation was cooled to room temperature after 3.5 hours in 180-200 ℃ tempering stove.

Claims

1. nodular cast iron alloy, it is characterized in that: be by weight percentage, the vanadium of the manganese of the aluminium of the magnesium of the carbon of 3.2-3.3%, the silicon of 2.8-3.0%, 0.03-0.04%, the chromium of 0.01-0.025%, 0.005-0.01%, the boron of 0.005-0.01%, 0.6-0.8%, the copper of 0.08-0.12%, 0.01-0.02%, be lower than 0.1% impurity, surplus is iron.