CN102909374A - Method for preparing mould punching sliding sleeve - Google Patents

Abstract

The invention discloses a method for preparing a mould punching sliding sleeve. The method comprises the following steps of: dosing, mixing at several times, sintering, heat treatment, blackening treatment and the like. Ingredients mainly comprise carbonyl iron powder, copper powder and the like. A scientific powder metallurgy production process is adopted, and the hardness and the strength of the produced product can meet a requirement of an enterprise; the mould punching sliding sleeve is formed by a hydraulic machine at one time, so that the sliding sleeve has an optimal structure, is material-saving, energy-saving and time-saving and easy for batch production and can meet a requirement on using strength; the density can reach over 7.4g/cm<3>; and for the product subjected to blackening treatment, the hardness of the surface of the product is improved, and the strength of the product is increased.

Description

A kind of preparation method of mould punching sliding sleeve

Technical field

The present invention relates to technical field of mold, specifically a kind of preparation method of mould punching sliding sleeve.

Background technology

The mould punching sliding sleeve is a kind of axle sleeve structure, and present sliding sleeve adopts turning processing, the waste material, and spended time is more, and mostly the sliding sleeve material be particular types, is difficult to satisfy the particular requirement of enterprise.The PM technique development is rapid, and production technology is simple, and the present invention adopts PM technique to produce sliding sleeve, the large reduction of cost.Intensity increases.

Summary of the invention

The invention provides a kind of preparation method of mould punching sliding sleeve, its disposal molding, overall performance better, be easy to batch production, relative cost is lower.

Technical scheme of the present invention is:

A kind of preparation method of mould punching sliding sleeve is characterized in that: may further comprise the steps:

(1), designs and produces the powder metallurgy diel of punching press sliding sleeve according to the requirement of drawing;

(2), the percentage by weight of each component of raw materials is:

Carbonyl iron dust 5-6, copper powder 1.2-1.6, martensite valve powdered steel 4-6, manganese powder 0.6-0.8, tungsten powder 0.8-1, cobalt powder 0.2-0.3, molybdenum 0.1-0.2, barium 0.8-1, copper powder 1.0-1.2, silicon 0.8-1, zirconium 0.2-0.3, lanthanum sesquioxide 0.2-0.3, graphite 1.0-1.2, zinc stearate 1-2, polyamide wax micropowder 1.0-1.2, isopropyl two oleic acid acyloxy (dioctyl phosphoric acid acyloxy) titanate esters 1-2, heavy alkylbenzene sulfonate 1-2, all the other are atomized iron powder.

(3), first with atomized iron powder and carbonyl iron dust and isopropyl two oleic acid acyloxy (dioctyl phosphoric acid acyloxy) titanate esters, heavy alkylbenzene sulfonate, pour Double cone mixer into and fully mix dispersion, speed of agitator 1500-1800 rev/min, incorporation time is 30-40 minute; Other composition is poured into, incorporation time is 30-40 minute more again, speed of agitator 2000-2200 rev/min;

(4), then mixed material is sent into mould, 500-600MPa is compressing;

(5), then the product with moulding adopts Autonet band oven sintering furnace to carry out presintering, as protective atmosphere, is warming up to 760--820 ℃, temperature retention time 2-3 hour with 60-70 ℃/hour with nitrogen; Then with 40-50 ℃ of/hour intensification, to 1180-1220 ℃, be incubated 2-3 hour, be cooled to 250-300 ℃;

(6), the blank after sintering cooling finished places batch-type furnace, is heated to 825-855 ℃, is incubated 1-2 hour, the oil quenching to 320 ℃ of coming out of the stove again with 20-25 ℃ of/hour heating rate, is tempered to 400-450 ℃, is incubated 10-12 hour, then air cooling is to room temperature;

(7), the antirust processing of final high temperature steam blackening, under 450-550 ℃ of temperature, lead to water vapour and make product surface after the shaping form the oxide-film of black densification.

The present invention has adopted the powder metallurgical production technique of science, therefore product hardness and the intensity of producing can both satisfy enterprise's requirement; Adopt the hydraulic press disposal molding, structure optimization during the saving metal material and energy joint, is easy to mass production, and can reaches the requirement of working strength, and density reachable is to 7.4g/cm ³Above; By the product of blackening process, its surperficial hardness also improves, and has increased the intensity of product.

The specific embodiment

A kind of preparation method of mould punching sliding sleeve may further comprise the steps:

(1), designs and produces the powder metallurgy diel of punching press sliding sleeve according to the requirement of drawing;

(2), the percentage by weight of each component of raw materials is:

Carbonyl iron dust 6, copper powder 1.2, martensite valve powdered steel 4, manganese powder 0.8, tungsten powder 0.8, cobalt powder 0.2, molybdenum 0.2, barium 0.8, copper powder 1.0, silicon 0.8, zirconium 0.2, lanthanum sesquioxide 0.3, graphite 1.0, zinc stearate 1, polyamide wax micropowder 1.2, isopropyl two oleic acid acyloxy (dioctyl phosphoric acid acyloxy) titanate esters 2, heavy alkylbenzene sulfonate 2, all the other are atomized iron powder.

(3), first with atomized iron powder and carbonyl iron dust and isopropyl two oleic acid acyloxy (dioctyl phosphoric acid acyloxy) titanate esters, heavy alkylbenzene sulfonate, pour Double cone mixer into and fully mix dispersion, speed of agitator 1500-1800 rev/min, incorporation time is 30-40 minute; Other composition is poured into, incorporation time is 30-40 minute more again, speed of agitator 2000-2200 rev/min;

(4), then mixed material is sent into mould, 500-600MPa is compressing;

(5), then the product with moulding adopts Autonet band oven sintering furnace to carry out presintering, as protective atmosphere, is warming up to 760--820 ℃, temperature retention time 2-3 hour with 60-70 ℃/hour with nitrogen; Then with 40-50 ℃ of/hour intensification, to 1180-1220 ℃, be incubated 2-3 hour, be cooled to 250-300 ℃;

(6), the blank after sintering cooling finished places batch-type furnace, is heated to 825-855 ℃, is incubated 1-2 hour, the oil quenching to 320 ℃ of coming out of the stove again with 20-25 ℃ of/hour heating rate, is tempered to 400-450 ℃, is incubated 10-12 hour, then air cooling is to room temperature;

(7), the antirust processing of final high temperature steam blackening, under 450-550 ℃ of temperature, lead to water vapour and make product surface after the shaping form the oxide-film of black densification.

Detect performance indications:

Hardness HRC:55-67, bending strength: 1080-1200Mpa, impact flexibility: 4.9-5.7J/cm ², tensile strength: 860-930 Mpa.

Claims (1)

1. the preparation method of a mould punching sliding sleeve is characterized in that: may further comprise the steps:

(1), designs and produces the powder metallurgy diel of punching press sliding sleeve according to the requirement of drawing;

(2), the percentage by weight of each component of raw materials is:

Carbonyl iron dust 5-6, copper powder 1.2-1.6, martensite valve powdered steel 4-6, manganese powder 0.6-0.8, tungsten powder 0.8-1, cobalt powder 0.2-0.3, molybdenum 0.1-0.2, barium 0.8-1, copper powder 1.0-1.2, silicon 0.8-1, zirconium 0.2-0.3, lanthanum sesquioxide 0.2-0.3, graphite 1.0-1.2, zinc stearate 1-2, polyamide wax micropowder 1.0-1.2, isopropyl two oleic acid acyloxy (dioctyl phosphoric acid acyloxy) titanate esters 1-2, heavy alkylbenzene sulfonate 1-2, all the other are atomized iron powder;

(3), first with atomized iron powder and carbonyl iron dust and isopropyl two oleic acid acyloxy (dioctyl phosphoric acid acyloxy) titanate esters, heavy alkylbenzene sulfonate, pour Double cone mixer into and fully mix dispersion, speed of agitator 1500-1800 rev/min, incorporation time is 30-40 minute; Other composition is poured into, incorporation time is 30-40 minute more again, speed of agitator 2000-2200 rev/min;

(4), then mixed material is sent into mould, 500-600MPa is compressing;

(5), then the product with moulding adopts Autonet band oven sintering furnace to carry out presintering, as protective atmosphere, is warming up to 760--820 ℃, temperature retention time 2-3 hour with 60-70 ℃/hour with nitrogen; Then with 40-50 ℃ of/hour intensification, to 1180-1220 ℃, be incubated 2-3 hour, be cooled to 250-300 ℃;

(6), the blank after sintering cooling finished places batch-type furnace, is heated to 825-855 ℃, is incubated 1-2 hour, the oil quenching to 320 ℃ of coming out of the stove again with 20-25 ℃ of/hour heating rate, is tempered to 400-450 ℃, is incubated 10-12 hour, then air cooling is to room temperature;

(7), the antirust processing of final high temperature steam blackening, under 450-550 ℃ of temperature, lead to water vapour and make product surface after the shaping form the oxide-film of black densification.