CN103602909B

CN103602909B - A kind of powder metallurgy rolling bearing and preparation method thereof

Info

Publication number: CN103602909B
Application number: CN201310469248.8A
Authority: CN
Inventors: 胡光荣
Original assignee: TONGLING XINCHUANG FLUID TECHNOLOGY Co Ltd
Current assignee: Jiangsu coastal agricultural science and Technology Development Co Ltd
Priority date: 2013-10-10
Filing date: 2013-10-10
Publication date: 2016-01-20
Anticipated expiration: 2033-10-10
Also published as: CN103602909A

Abstract

The invention discloses a kind of powder metallurgy rolling bearing, it is characterized in that, be made up of the raw material of following weight part: graphite 0.6-0.8, copper 1.2-1.3, silicon 2.1-2.3, manganese 5.7-5.9, chromium 10.2-10.7, molybdenum 0.2-0.3, titanium 1.2-1.3, TiB2 0.2-0.3, niobium (Nb) boride 0.2-0.3, V ₂o ₅0.3-0.4, Zinc Stearate 2-3, steel scrap powder 89-91, auxiliary agent 1-2; Increase graphite in raw material of the present invention, add wear resistance and the oilness of bearing, the bearing dense structure of manufacture, microtexture is good, and hole is little, and structural rigidity, hardness, fatigue performance, tensile strength properties are excellent, and wear resistant corrosion resistant, and noise is low.

Description

A kind of powder metallurgy rolling bearing and preparation method thereof

Technical field

The present invention relates to field of powder metallurgy, particularly a kind of powder metallurgy rolling bearing and preparation method thereof.

Background technology

Powder metallurgy be produce metal-powder or with metal-powder (or mixture of metal-powder and non-metal powder) as raw material, through shaping and sintering, produce the industrial technology of metallic substance, matrix material and all kinds goods.At present, powder metallurgy technology has been widely used in the fields such as traffic, machinery, electronics, aerospace, weapons, biology, new forms of energy, information and nuclear industry, becomes one of branch of most development vitality in novel material science.Powder metallurgy technology possess significantly energy-conservation, economize the high and series of advantages such as good stability of material, excellent performance, Product Precision, be very suitable for producing in enormous quantities.In addition, the material that part conventional casting methods and machining process cannot be prepared and complicated shape also available powders metallurgical technology manufacture, thus enjoy the attention of industry member.Powder metallurgy structural part product material composition does not limit by melting, both can add alloying constituent, also can add other structural constituent, and adjusts as requested in sizable scope, and then can reach the effect of mating with steel part in mechanical property.

Powder metallurgy mechanization degree is high, can reduce personnel, can raise the efficiency again, and then cost-saving.Powder metallurgy technology can replace traditional manufacturing process, for the vast traditional forms of enterprises is cost-saving.

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

As the bearing steel that rotating machinery generally uses, be generally following steel: in spot contact bearing and stick roller bearing, the steel of the hardening treatment of the high-carbon-chromium bearing steel that use carbon containing is high or surface cementation.Carburizing bearing is that effects on surface hardened steel carries out carburizing treatment, has high surface hardness and soft core, is particularly suitable for the purposes being used in impact load.In the bearing used under more than 110 DEG C of environment, low-temperaturetempering structural section, can not use owing to can there is the reasons such as tissue change, softening and dimensional change, and can only use the high carbon element high quality steel of high tempering type.But existing bearing steel has following defect respectively: 1) case hardening steel is identical with high-carbon-chromium bearing steel, melting refining is difficult to oxygen level is reduced, easily produces the non-metallic inclusions such as oxide compound, this is the major cause that rolling bearing life reduces.2) high-carbon element alloy steel also easily generates the large carbide particle that rolling bearing life is declined, and in order to solve this defect, being generally add chromium in the alloy, both using high-carbon-chromium bearing steel.And high-carbon-chromium bearing steel gets rusty easily, appearance needs to use slushing oil, can affect the normal work of precision machinery like this, therefore in corrosion-resistant environment, use martensitic stainless steel.But the stainless steel of martensitic, cutting ability is poor, cannot carry out high-precision machining, therefore cannot be used in precision machinery.For overcoming above defect, just have wear-resisting and excellent corrosion resistance and the roller bearing steel of lower noise is suggested, but the existing technology solved the problem proposed is homogeneous can solve the existing problem of rolling bearing completely.

Summary of the invention

The object of this invention is to provide a kind of wear resistant corrosion resistant rolling bearing material utilizing powder metallurgy technology to produce.

In order to realize object of the present invention, the present invention is by following scheme implementation:

A kind of powder metallurgy rolling bearing, is made up of the raw material of following weight part: graphite 0.6-0.8, copper 1.2-1.3, silicon 2.1-2.3, manganese 5.7-5.9, chromium 10.2-10.7, molybdenum 0.2-0.3, titanium 1.2-1.3, TiB2 0.2-0.3, niobium (Nb) boride 0.2-0.3, V ₂o ₅0.3-0.4, Zinc Stearate 2-3, steel scrap powder 89-91, auxiliary agent 1-2;

Described auxiliary agent is made up of the raw material of following weight part: iron powder 3-4, kaolin 2-3, nano-sized carbon 1-2, Zirconium tetrafluoride 1-2, alum 2-3, sodium alginate 2-3, tripoly phosphate sodium STPP 1-2, lapis amiridis 2-3, copper sulfate 1-2, calcium stearate 1-2, vinyltriethoxysilane 2-3; Preparation method is by iron powder, kaolin, Zirconium tetrafluoride, alum, sodium alginate, tripoly phosphate sodium STPP, lapis amiridis, copper sulfate mixing, grind to form 200-300 order powder, then add vinyltriethoxysilane and mix, under 10-15Mpa, be pressed into blank, then, calcine 3-4 hour at sending into 920-950 DEG C, after cooling, be ground into 300-400 order powder, mix with other remaining component, be heated to 60-70 DEG C, under 1200-1500 rev/min, stir 1-2 hour, to obtain final product.

Powder metallurgy rolling bearing of the present invention, be made up of following concrete steps:

(1) by copper, manganese, chromium, molybdenum, titanium, steel scrap powder, V ₂o ₅mixing, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying dry, oven dry, make bulk at 8-10Mpa pressure, then under nitrogen protection atmosphere 600-650 DEG C carry out sintering 8-10 hour, cross 200-400 mesh sieve by after the crushing material after sintering;

(2) other remaining component is mixed;

(3) step (1), (2) material after mixing and stirring 65-85 minute, are loaded mould, are pressed into base at 55-65 DEG C;

(4) pressed compact is placed in sintering oven, to 650-750 DEG C of condition, sinters 1.5-2 hour with 6-8 DEG C/min of ramp; Then to 1100-1150 DEG C of condition, 2-3 hour is sintered with 5-7 DEG C/min of ramp; Sinter 1-2 hour under being cooled to 350-450 DEG C of condition with 9-12 DEG C/min of speed again, in last air, be cooled to room temperature.

Increase graphite in raw material of the present invention, add wear resistance and the oilness of bearing, the bearing dense structure of manufacture, microtexture is good, and hole is little, and structural rigidity, hardness, fatigue performance, tensile strength properties are excellent, and wear resistant corrosion resistant, and noise is low.

Embodiment

Below by specific examples, the present invention is described in detail.

A kind of powder metallurgy rolling bearing, is made up of the raw material of following weight part (kilogram): graphite 0.6, copper 1.2, silicon 2.1, manganese 5.7, chromium 10.2, molybdenum 0.2, titanium 1.2, TiB2 0.2, niobium (Nb) boride 0.2, V ₂o ₅0.3, Zinc Stearate 2, steel scrap powder 89, auxiliary agent 1;

Described auxiliary agent is made up of the raw material of following weight part (kilogram): iron powder 3, kaolin 2, nano-sized carbon 2, Zirconium tetrafluoride 1, alum 2, sodium alginate 3, tripoly phosphate sodium STPP 1, lapis amiridis 3, copper sulfate 1, calcium stearate 1, vinyltriethoxysilane 3; Preparation method is by iron powder, kaolin, Zirconium tetrafluoride, alum, sodium alginate, tripoly phosphate sodium STPP, lapis amiridis, copper sulfate mixing, grind to form 200-300 order powder, then add vinyltriethoxysilane and mix, under 10-15Mpa, be pressed into blank, then, calcine 3-4 hour at sending into 920-950 DEG C, after cooling, be ground into 300-400 order powder, mix with other remaining component, be heated to 60-70 DEG C, under 1200-1500 rev/min, stir 1-2 hour, to obtain final product.

(2) other remaining component is mixed;

Through detecting, the hardness of flange of the present invention: HRC58; Tensile strength: 860MPa.

Claims

1. a powder metallurgy rolling bearing, it is characterized in that, be made up of the raw material of following weight part: graphite 0.6-0.8, copper 1.2-1.3, silicon 2.1-2.3, manganese 5.7-5.9, chromium 10.2-10.7, molybdenum 0.2-0.3, titanium 1.2-1.3, TiB2 0.2-0.3, niobium (Nb) boride 0.2-0.3, V ₂o ₅0.3-0.4, Zinic stearas 2-3, steel scrap powder 89-91, auxiliary agent 1-2;

2. powder metallurgy rolling bearing according to claim 1, is characterized in that, be made up of following concrete steps:

(2) other remaining component is mixed;