CN103667972A

CN103667972A - Special abrasion-resistant alloy material and preparation method thereof

Info

Publication number: CN103667972A
Application number: CN201310550328.6A
Authority: CN
Inventors: 梅百荣; 徐志勇
Original assignee: TONGLING ANDONG CAST STEEL CO Ltd
Current assignee: TONGLING ANDONG CAST STEEL CO Ltd
Priority date: 2013-11-08
Filing date: 2013-11-08
Publication date: 2014-03-26
Anticipated expiration: 2033-11-08
Also published as: CN103667972B

Abstract

The invention relates to a special abrasion-resistant alloy material comprising the following chemical elementary components in percentage by mass: 0.1-0.3% of carbon, 0.3-0.5% of silicon, 0.1-0.2% of boron, 3.0-3.3% of chromium, 11.0-11.5% of nickel, 3.3-3.5% of cobalt, 0.2-0.5% of molybdenum, 0.6-0.8% of copper, 0.01-0.03% of osmium, 0.003-0.005% of iridium, 0.004-0.006% of ruthenium, 1.0-2.5% of rhodium, equal to or less than 0.030% of phosphorus, equal to or less than 0.030% of sulphur and the balance of iron. According to the invention, the rare earth elements are combined with the other raw metal materials and the proportion, the production process and the feed order are reasonably set to ensure that the formed alloy material has a good comprehensive mechanical property and particularly has the characteristics of high strength and hardness, excellent abrasive resistance and the like, so that the life of abrasion-resistant parts can be remarkably prolonged, the damage rate of machinery is reduced and the security coefficient is increased; part of scrap iron is adopted as the raw material to ensure that the quality of the alloy is stable and uniform; and a refining agent is added to ensure that porosity is reduced by 1-2 degrees.

Description

A kind of special type wear-resistant alloy material and preparation method thereof

Technical field

The present invention relates to metallic substance preparation field, relate in particular to a kind of special type wear-resistant alloy material and preparation method thereof.

Background technology

The development of steel alloy has had the history of more than 100 year, up to the present, diversified steel alloy is employed industrial, mainly contain with Types Below: quenched and tempered steel, spring steel, tool steel, rapid steel, die steel, high, normal, basic carbon alloy steel etc., so far, although steel alloy technology is greatly developed, but, still have a lot of problems to exist, as fastness to rubbing, hardness, rustless property, corrosion resistance nature, high and low temperature resistance, fragility, toughness, costs etc. can not be taken into account, in a lot of occasions, can't meet the requirement of production, also require further improvement, to enhance productivity, reduce costs, improve security, for high-quality precision and sophisticated technology development provides safeguard, for social development provides power, task is also very arduous.

Summary of the invention

The object of the present invention is to provide a kind of special type wear-resistant alloy material and preparation method thereof, this alloy material has high wear resistance and hardness.

Technical scheme of the present invention is as follows:

A special type wear-resistant alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.1-0.3, silicon 0.3-0.5, boron 0.1-0.2, chromium 3.0-3.3, nickel 11.0-11.5, cobalt 3.3-3.5, Mo0.2-0.5, Cu0.6-0.8, Os0.01-0.03, Ir0.003-0.005, Ru0.004-0.006, Rh1.0-2.5, P≤0.030, S≤0.030, surplus are iron.

The production method of described special type wear-resistant alloy material, is characterized in that:

(1), the pig iron and scrap iron are dropped in stove and melt and originate as ferrous substrate in 1:2 ratio; Carry out desulfurization, deoxidation, alloying, the refining of employing refining agent, casting, casting postheat treatment etc.;

(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, boron; (2) Cu, Os, Ir; (3) chromium, nickel, cobalt; (4) other remaining component; The timed interval that each batch drops into element is 8-10 minute, after feeding intake, stirs.

Described casting postheat treatment is:

First by room temperature, with 200-230 ℃/h of speed, be warming up to 915-925 ℃, insulation 3-4 hour; With 140-160 ℃/h of speed, be cooled to 620-630 ℃ again, insulation 30-60 minute; With 100-120 ℃/h of speed, be cooled to 320-340 ℃ again, insulation 2-3 hour; To be warming up to 520-540 ℃ with 150-170 ℃/h of speed again, insulation 2-3 hour, takes out air cooling and get final product again.

Described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 3-4, clay 13-16, light calcium carbonate 2-3, silicon-dioxide 2-3, zinc oxide 1-2, wollastonite powder 3-4, magnesium hydroxide 10-12, diatomite 4-5, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2, BaCO3 3-4, BaF ₂2-3; Preparation method mixes each raw material, is heated to molten state, then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 ℃, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain.

Beneficial effect of the present invention

The present invention is by using rare earth element and other material combination, proportioning and production technique are rationally set, input order is rationally set, the alloy material forming has good comprehensive mechanical property, especially there is the features such as intensity and hardness are high, wear resistance is fabulous, can the significant prolongation wear resisting part life-span, reduce mechanical spoilage, increased safety coefficient; And use part scrap iron as raw material, make the steady quality homogeneous of alloy.Refining agent of the present invention is for Foundry Production, and the degree of porosity obviously improving in yield rate, particularly foundry goods reduces 1-2 degree, is controlled effectively, and can not produce pore at cast(ing) surface, and trapped oxide also obviously reduces, and oxide inclusion is 2 grades of left and right.

Embodiment

A special type wear-resistant alloy material, chemical element composition and mass percent thereof that it contains are: carbon 0.1-0.3, silicon 0.3-0.5, boron 0.1-0.2, chromium 3.0-3.3, nickel 11.0-11.5, cobalt 3.3-3.5, Mo0.2-0.5, Cu0.6-0.8, Os0.01-0.03, Ir0.003-0.005, Ru0.004-0.006, Rh1.0-2.5, P≤0.030, S≤0.030, surplus are iron.

The production method of described special type wear-resistant alloy material is:

(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, boron; (2) Cu, Os, Ir; (3) chromium, nickel, cobalt; (4) other remaining component; The timed interval that each batch drops into element is 9 minutes, after feeding intake, stirs.

Described casting postheat treatment is: first by room temperature, with 210 ℃/h of speed, be warming up to 920 ℃, be incubated 3.5 hours; With 150 ℃/h of speed, be cooled to 625 ℃ again, be incubated 46 minutes; With 110 ℃/h of speed, be cooled to 330 ℃ again, be incubated 2.5 hours; To be warming up to 530 ℃ with 160 ℃/h of speed again, be incubated 2.4 hours again, take out air cooling.

Described refining agent by following weight part (kilogram) raw material make: instrument comminuted steel shot 4, clay 13, light calcium carbonate 2, silicon-dioxide 3, zinc oxide 1, wollastonite powder 4, magnesium hydroxide 12, diatomite 4, aluminium hydroxide 8, jade powder 3, montmorillonite 2, BaCO3 3, BaF ₂2; Preparation method mixes each raw material, is heated to molten state, then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 ℃, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain.

The mechanical property of special type wear-resistant alloy material of the present invention is: tensile strength 1056MPa, yield strength 840MPa, unit elongation 14%, relative reduction in area 27%, impact absorbing energy 53J, impelling strength 64J/cm2, hardness 295HB.

Claims

1. a special type wear-resistant alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.1-0.3, silicon 0.3-0.5, boron 0.1-0.2, chromium 3.0-3.3, nickel 11.0-11.5, cobalt 3.3-3.5, Mo0.2-0.5, Cu0.6-0.8, Os0.01-0.03, Ir0.003-0.005, Ru0.004-0.006, Rh1.0-2.5, P≤0.030, S≤0.030, surplus are iron.

2. the production method of special type wear-resistant alloy material according to claim 1, is characterized in that:

3. the production method of special type wear-resistant alloy material according to claim 2, is characterized in that: described casting postheat treatment is: first by room temperature, with 200-230 ℃/h of speed, be warming up to 915-925 ℃, insulation 3-4 hour; With 140-160 ℃/h of speed, be cooled to 620-630 ℃ again, insulation 30-60 minute; With 100-120 ℃/h of speed, be cooled to 320-340 ℃ again, insulation 2-3 hour; With 150-170 ℃/h of speed, be warming up to 520-540 ℃ again, insulation 2-3 hour, takes out air cooling and get final product.

4. the production method of special type wear-resistant alloy material according to claim 2, is characterized in that: described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 3-4, clay 13-16, light calcium carbonate 2-3, silicon-dioxide 2-3, zinc oxide 1-2, wollastonite powder 3-4, magnesium hydroxide 10-12, diatomite 4-5, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2, BaCO3 3-4, BaF ₂2-3; Preparation method mixes each raw material, is heated to molten state, then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 ℃, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain.