CN103406532A - Car shaft-type component powder metallurgy material and preparation method thereof - Google Patents

Abstract

Provided are a car shaft-type component powder metallurgy material and a preparation method thereof. The car shaft-type component powder metallurgy material is characterized by comprising, by weight, 93-94 parts of iron powder, 1.2-1.4 parts of chromium powder, 0.3-0.4 part of molybdenum powder, 0.8-1.0 part of manganese sulfide, 0.4-0.6 part of copper, 0.3-0.4 part of nickel powder, 1-2 parts of microcrystalline wax, 1.2-1.3 parts of SnO2, 0.5-0.7 part of V2O5, 0.06-0.08 part of Nb, 0.4-0.6 part of tungsten carbide, 0.3-0.5 part of TiC, 0.1-0.2 part of diboride hafnium, 2-3 parts of dispersing agents and 2-3 parts of stearic acid. According to the formula of the car shaft-type component powder metallurgy material, the chromium powder is added, so hardness, abrasion resistance, hitting prevention, corrosion resistance of shaft components under a high temperature are obviously improved, and good dimensional precision and surface roughness of a cutting face after cutting are guaranteed.

Description

A kind of automobile shafts base part powdered metallurgical material and preparation method thereof

Technical field

The present invention relates to field of powder metallurgy, relate in particular to a kind of automobile shafts base part powdered metallurgical material and preparation method thereof.

Background technology

PM technique be by material science and the metal forming technology perfect combine a kind of new technique because efficient, without machining, material-saving, energy-saving and environmental protection, be widely used in various industries.

Powder metallurgy structural part product material composition is not limited by melting, both can add alloying component, can add other structural constituent yet, and adjusts as requested in sizable scope, and then on mechanical property, can reach the effect of mating with steel part.

The powder metallurgy mechanization degree is high, can reduce personnel, can raise the efficiency again, so that cost-saving.PM technique can replace traditional manufacturing process, for the vast traditional forms of enterprises cost-saving.

So study the formula of the powder metallurgy of various components of machine, adapt to different needs, have great importance.

Summary of the invention

The purpose of this invention is to provide a kind of automobile shafts base part powdered metallurgical material and preparation method thereof,

Technical scheme of the present invention is as follows:

A kind of automobile shafts base part powdered metallurgical material is characterized in that being made by the raw material of following weight portion: iron powder 93-94, chromium powder 1.2-1.4, molybdenum powder 0.3-0.4, manganese sulfide 0.8-1.0, copper 0.4-0.6, nickel powder 0.3-0.4, microwax 1-2, SnO ₂1.2-1.3, V ₂O ₅0.5-0.7, Nb0.06-0.08, tungsten carbide 0.4-0.6, TiC0.3-0.5, hafnium boride 0.1-0.2,, dispersant 2-3, stearic acid 2-3.

Described dispersant is made by the raw material of following weight portion: polyethylene glycol 2-3, Bi2O3 0.2-0.3, aminopropyl triethoxysilane 0.5-0.8, aluminium nitride 1-1.3, Nb2O5 0.3-0.5, barium sulfate 1-2, zinc stearate 4-5, stearic acid monoglyceride 2-3.

The preparation method is: by each mixing of materials, grinding distribution evenly gets final product.

The preparation method of described automobile shafts base part powdered metallurgical material is characterized in that comprising the following steps:

(1) iron powder, chromium powder, molybdenum powder, manganese sulfide, dispersant, stearic acid are mixed;

(2) other residual components is mixed, evenly;

(3) by step (1), (2) material after 50-55 ℃ of lower mixing and stirring 50-60 minute, the mould of packing into, be pressed into base;

(4) pressed compact is placed in sintering furnace, under the blanket of nitrogen that contains oxygen component 2-3%, is warming up to sintering 2-3 hour under 420-450 ℃ of condition with 6-8 ℃ of/minute clock rate; Then the blanket of nitrogen oxygen content is adjusted into to 0.3-0.5%, is warming up to sintering 120-150 minute under 1020-1080 ℃ of condition with 10-12 ℃ of/minute clock rate; Take out again air cooling;

(5) pressed compact is sent into to sintering 120-150 minute in 450-480 ℃ of stove;

(6) pressed compact is sent in the steam treatment stove, after in stove, passing into steam 40-60 minute under the condition of temperature 520-550 ℃, taken out and get final product.

In the present invention formula, increase chromium powder, make spindle unit at high temperature hardness, wear-resistant, anti-strike, anticorrosive anti-wear performance be obvious raising, after cutting, guarantee that dimensional accuracy and the surface roughness in cutting face is good.

The specific embodiment

A kind of automobile shafts base part powdered metallurgical material, by the raw material (kilogram) of following weight portion, made:

Iron powder 93, chromium powder 1.4, molybdenum powder 0.4, manganese sulfide 1.0, copper 0.6, nickel powder 0.4, microwax 2, SnO ₂1.2, V ₂O ₅0.5, Nb 0.06, tungsten carbide 0.4, TiC 0.3, hafnium boride 0.2, dispersant 3, stearic acid 2.

Described dispersant is made by the raw material of following weight portion: polyethylene glycol 3, Bi ₂O ₃0.3, aminopropyl triethoxysilane 0.5, aluminium nitride 1, Nb ₂O ₅0.5, barium sulfate 2, zinc stearate 5, stearic acid monoglyceride 2.

The preparation method is: by each mixing of materials, grinding distribution evenly gets final product.

The preparation method of automobile shafts base part powdered metallurgical material comprises the following steps:

(1) iron powder, chromium powder, molybdenum powder, manganese sulfide, dispersant, stearic acid are mixed;

(2) other residual components is mixed, evenly;

(3) by step (1), (2) material after 50-55 ℃ of lower mixing and stirring 50-60 minute, the mould of packing into, be pressed into base;

(4) pressed compact is placed in sintering furnace, under the blanket of nitrogen that contains oxygen component 2-3%, is warming up to sintering 2-3 hour under 420-450 ℃ of condition with 6-8 ℃ of/minute clock rate; Then the blanket of nitrogen oxygen content is adjusted into to 0.3-0.5%, is warming up to sintering 120-150 minute under 1020-1080 ℃ of condition with 10-12 ℃ of/minute clock rate; Take out again air cooling;

(5) pressed compact is sent into to sintering 120-150 minute in 450-480 ℃ of stove;

(6) pressed compact is sent in the steam treatment stove, after in stove, passing into steam 40-60 minute under the condition of temperature 520-550 ℃, taken out and get final product.

Through detection, the heat treatment hardness of automobile shafts of the present invention: HRC59; Tensile strength: 1170MPa.

Claims (2)

1. an automobile shafts base part powdered metallurgical material, is characterized in that being made by the raw material of following weight portion: iron powder 93-94, chromium powder 1.2-1.4, molybdenum powder 0.3-0.4, manganese sulfide 0.8-1.0, copper 0.4-0.6, nickel powder 0.3-0.4, microwax 1-2, SnO ₂1.2-1.3, V ₂O ₅0.5-0.7, Nb0.06-0.08, tungsten carbide 0.4-0.6, TiC0.3-0.5, hafnium boride 0.1-0.2,, dispersant 2-3, stearic acid 2-3;

Described dispersant is made by the raw material of following weight portion: polyethylene glycol 2-3, Bi ₂O ₃0.2-0.3, aminopropyl triethoxysilane 0.5-0.8, aluminium nitride 1-1.3, Nb ₂O ₅0.3-0.5, barium sulfate 1-2, zinc stearate 4-5, stearic acid monoglyceride 2-3; The preparation method is: by each mixing of materials, grinding distribution evenly gets final product.

2. the preparation method of automobile shafts base part powdered metallurgical material according to claim 1 is characterized in that comprising the following steps:

(1) iron powder, chromium powder, molybdenum powder, manganese sulfide, dispersant, stearic acid are mixed;

(2) other residual components is mixed, evenly;

(3) by step (1), (2) material after 50-55 ℃ of lower mixing and stirring 50-60 minute, the mould of packing into, be pressed into base;

(4) pressed compact is placed in sintering furnace, under the blanket of nitrogen that contains oxygen component 2-3%, is warming up to sintering 2-3 hour under 420-450 ℃ of condition with 6-8 ℃ of/minute clock rate; Then the blanket of nitrogen oxygen content is adjusted into to 0.3-0.5%, is warming up to sintering 120-150 minute under 1020-1080 ℃ of condition with 10-12 ℃ of/minute clock rate; Take out again air cooling;

(5) pressed compact is sent into to sintering 120-150 minute in 450-480 ℃ of stove;

(6) pressed compact is sent in the steam treatment stove, after in stove, passing into steam 40-60 minute under the condition of temperature 520-550 ℃, taken out and get final product.