CN103589930A - Stainless-steel-bonded powder metallurgy tool and preparation method thereof - Google Patents

Abstract

The invention discloses a stainless-steel-bonded powder metallurgy tool which is characterized by being prepared from the following raw materials in parts by weight: 30-34 of stainless steel powder, 40-42 of tungsten carbide, 12-13 of iron powder, 3-4 of chromium, 4-5 of nickel, 10-11 of silicon carbide, 2-3 of molybdenum trioxide, 1-2 of sodium molybdate, 1-2 of graphite, 2-3 of stearic acid zinc salt and 2-3 of disperse phase. The disperse phase is added, so that alloy powder is uniformly dispersed, the vertical and horizontal uniformity of the internal structure of the product is ensured, the abrasive resistance is increased, and the service life of the product is prolonged. The stainless-steel-bonded powder metallurgy tool has the advantages of stable quality, high hardness, good abrasive resistance and good application prospect and is not easy to generate a rupture phenomenon, and the performance is superior to common high-speed steel.

Description

Powder metallurgy cutter of a kind of stainless steel bonding and preparation method thereof

Technical field

The present invention relates to field of powder metallurgy, particularly powder metallurgy cutter of a kind of stainless steel bonding 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 being shaped 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 tool development vitality in novel material science.That powder metallurgy technology possesses is significantly energy-conservation, economize material, excellent performance, Product Precision is high and the series of advantages such as good stability, is very suitable for producing in enormous quantities.The cutting tool performance of p/m high speed steel manufacture is better than common rapid steel, work-ing life is higher than common rapid steel (general 2～3 times), at the large cutting occasion of impact load alternative inserted tool again, therefore p/m high speed steel cutter is very good in the application prospect of tool industry, more and more receives people's concern.Compare with common speedy steel cutting-tool, p/m high speed steel cutter hardness is higher, toughness better, more wear-resistant, therefore in some Application Areas (as the processing occasion of high impact-resistant, large excision amount), p/m high speed steel cutter have replace gradually fragility large, under cutting-impact the easy trend of chipping solid carbide.

Summary of the invention

The object of this invention is to provide powder metallurgy cutter of a kind of stainless steel bonding and preparation method thereof.

In order to realize object of the present invention, the present invention passes through following scheme implementation:

A powder metallurgy cutter for bonding, is made by the raw material of following weight part: Stainless Steel Powder 30-34, wolfram varbide 40-42, iron powder 12-13, chromium 3-4, nickel 4-5, silicon carbide 10-11, molybdic oxide 2-3, Sodium orthomolybdate 1-2, graphite 1-2, Zinc Stearate 2-3, disperse phase 2-3;

Described disperse phase is made by the raw material of following weight part: iron powder 30-40, tripoly phosphate sodium STPP 1-2, iron(ic) chloride 1-2, feldspar in powder 2-3, Tremoliteor Tremoliteasbestos 5-6, sal epsom 2-3, nano silicon 1-2, N660 carbon black 2-3, Union carbide A-162 1-2; Preparation method mixes iron powder, tripoly phosphate sodium STPP, iron(ic) chloride, feldspar in powder, Tremoliteor Tremoliteasbestos, sal epsom, grind to form 200-300 order powder, then add Union carbide A-162 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other remaining component, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.

The powder metallurgy cutter of stainless steel bonding of the present invention, by following concrete steps, made:

(1) Stainless Steel Powder, wolfram varbide, iron powder, chromium, nickel are mixed with disperse phase, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 12-15Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-750 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other remaining component is mixed;

(3) at 62-66 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering oven, with 8-12 ℃/min of speed, is warming up to sintering 1-2 hour under 450-550 ℃ of condition, then be warming up to sintering 1.5-2 hour under 800-850 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; In air, be cooled to room temperature.

The present invention adds disperse phase, and powdered alloy is uniformly dispersed, and guarantees the uniformity coefficient in length and breadth of interiors of products weave construction, increases wear resistance, and increased the work-ing life of product; Steady quality of the present invention, hardness is large, and wear resistance is good, is not prone to phenomenon of rupture, and performance is better than common rapid steel, and application prospect is good.

Specific embodiments

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

Bonding a powder metallurgy cutter, by following weight part (kilogram) raw material make: Stainless Steel Powder 30, wolfram varbide 40, iron powder 12, chromium 3, nickel 4, silicon carbide 10, molybdic oxide 2, Sodium orthomolybdate 1, graphite 1, Zinc Stearate 2, disperse phase 2;

Described disperse phase by following weight part (kilogram) raw material make: iron powder 30, tripoly phosphate sodium STPP 1, iron(ic) chloride 1, feldspar in powder 2, Tremoliteor Tremoliteasbestos 5, sal epsom 2, nano silicon 1, N660 carbon black 2, Union carbide A-162 1; Preparation method mixes iron powder, tripoly phosphate sodium STPP, iron(ic) chloride, feldspar in powder, Tremoliteor Tremoliteasbestos, sal epsom, grind to form 200-300 order powder, then add Union carbide A-162 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other remaining component, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.

The powder metallurgy cutter of stainless steel bonding of the present invention, by following concrete steps, made:

(1) Stainless Steel Powder, wolfram varbide, iron powder, chromium, nickel are mixed with disperse phase, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 12-15Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-750 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other remaining component is mixed;

(3) at 62-66 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering oven, with 8-12 ℃/min of speed, is warming up to sintering 1-2 hour under 450-550 ℃ of condition, then be warming up to sintering 1.5-2 hour under 800-850 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; In air, be cooled to room temperature.

Through detecting, hardness of the present invention can reach HRC57.

Claims (2)

1. the powder metallurgy cutter of stainless steel bonding, it is characterized in that, by the raw material of following weight part, made: Stainless Steel Powder 30-34, wolfram varbide 40-42, iron powder 12-13, chromium 3-4, nickel 4-5, silicon carbide 10-11, molybdic oxide 2-3, Sodium orthomolybdate 1-2, graphite 1-2, Zinc Stearate 2-3, disperse phase 2-3;

Described disperse phase is made by the raw material of following weight part: iron powder 30-40, tripoly phosphate sodium STPP 1-2, iron(ic) chloride 1-2, feldspar in powder 2-3, Tremoliteor Tremoliteasbestos 5-6, sal epsom 2-3, nano silicon 1-2, N660 carbon black 2-3, Union carbide A-162 1-2; Preparation method mixes iron powder, tripoly phosphate sodium STPP, iron(ic) chloride, feldspar in powder, Tremoliteor Tremoliteasbestos, sal epsom, grind to form 200-300 order powder, then add Union carbide A-162 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other remaining component, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.

2. the powder metallurgy cutter that stainless steel bonds according to claim 1, is characterized in that, by following concrete steps, is made:

(1) Stainless Steel Powder, wolfram varbide, iron powder, chromium, nickel are mixed with disperse phase, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 12-15Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-750 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other remaining component is mixed;

(3) at 62-66 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering oven, with 8-12 ℃/min of speed, is warming up to sintering 1-2 hour under 450-550 ℃ of condition, then be warming up to sintering 1.5-2 hour under 800-850 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; In air, be cooled to room temperature.