CN104073733A

CN104073733A - Air corrosion-resistant alloy steel material and preparation method thereof

Info

Publication number: CN104073733A
Application number: CN201410194467.4A
Authority: CN
Inventors: 肖颖
Original assignee: Tongling Mingcheng Casting Co Ltd
Current assignee: Tongling Mingcheng Casting Co Ltd
Priority date: 2014-05-09
Filing date: 2014-05-09
Publication date: 2014-10-01

Abstract

The invention discloses an air corrosion-resistant alloy steel material which consists of the chemical element components in percentage by weight: 0.3-0.5% of carbon, 0.1-0.2% of silicon, 1.3-1.5% of manganese, 0.2-0.5% of molybdenum, 1.8-2.1% of nickel, 0.01-0.03% of chromium, 0.005-0.008% of vanadium, 7.0-7.5% of copper, 0.3-0.5% of Ti, 0.4-0.6% of B, not greater than 0.030% of P, not greater than 0.030% of S, and the balance of iron. According to the invention, copper, nickel and vanadium materials are combined, a proportion and a production process are reasonably set, and an adding order is reasonably set, so that the formed alloy material has characteristics of being high in strength and hardness, and good in wear resistance and toughness, has excellent air corrosion resistance, and can remarkably prolong service life of an anti-wearing part; moreover, part of scrap iron is taken as the material, so that stability of the alloy is stable and uniform; a refining agent is added, so that porosity is lowered by 1-2 degrees.

Description

A kind of alloy steel material of resistance to air corrosion and preparation method thereof

Technical field

The present invention relates to metallic substance preparation field, relate in particular to a kind of alloy steel material of resistance to air corrosion 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 alloy steel material of resistance to air corrosion and preparation method thereof, this alloy material has the feature of high hardness, toughness and resistance to atmospheric corrosion.

Technical scheme of the present invention is as follows:

A kind of alloy steel material of resistance to air corrosion, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.3-0.5, silicon 0.1-0.2, manganese 1.3-1.5, molybdenum 0.2-0.5, nickel 1.8-2.1, chromium 0.01-0.03, vanadium 0.005-0.008, copper 7.0-7.5, Ti0.3-0.5, B0.4-0.6, P≤0.030, S≤0.030, surplus are iron.

The production method of the described alloy steel material of resistance to air corrosion, is characterized in that:

(1), the pig iron and scrap iron are dropped in stove and melt and originate as ferrous substrate in 1:1 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, Ti, vanadium; (2) copper, chromium; (3) manganese, B; (4) other remaining component; The timed interval that each batch drops into element is 13-15 minute, after feeding intake, stirs.

Described casting postheat treatment is: first by room temperature, with 210-230 ℃/h of speed, be warming up to 925-945 ℃, insulation 3-4 hour; With 140-160 ℃/h of speed, be cooled to 630-650 ℃ again, insulation 30-60 minute; With 100-120 ℃/h of speed, be cooled to 310-330 ℃ again, insulation 2-3 hour; With 150-170 ℃/h of speed, be warming up to 530-550 ℃ again, insulation 2-3 hour, takes out air cooling and get final product.

Described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 3-4, clay 10-12, Wingdale 3-4, sepiolite 2-3, Sodium Silicofluoride 2-3, SODIUMNITRATE 1-2, vermiculite 5-6, silicon carbide 9-11, titanium dioxide 2-3, fluorite 6-8, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2; Preparation method mixes each raw material, is heated to molten state and stirs remove slag, and 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 copper, nickel, vanadium raw materials to combine, proportioning and production technique are rationally set, input order is rationally set, the alloy material of formation has the feature of high strength, hardness, wear resistance, good toughness, there is well excellent resistance to atmospheric corrosion energy, can the significant prolongation wear resisting part life-span; 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 kind of alloy steel material of resistance to air corrosion, chemical element composition and mass percent thereof that it contains are: carbon 0.3-0.5, silicon 0.1-0.2, manganese 1.3-1.5, molybdenum 0.2-0.5, nickel 1.8-2.1, chromium 0.01-0.03, vanadium 0.005-0.008, copper 7.0-7.5, Ti0.3-0.5, B0.4-0.6, P≤0.030, S≤0.030, surplus are iron.

The production method of the described alloy steel material of resistance to air corrosion is:

(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, Ti, vanadium; (2) copper, chromium; (3) manganese, B; (4) other remaining component; The timed interval that each batch drops into element is 14 minutes, after feeding intake, stirs.

Described casting postheat treatment is: first by room temperature, with 220 ℃/h of speed, be warming up to 935 ℃, be incubated 3.5 hours; With 150 ℃/h of speed, be cooled to 640 ℃ again, be incubated 40 minutes; With 110 ℃/h of speed, be cooled to 320 ℃ again, be incubated 2.5 hours; With 160 ℃/h of speed, be warming up to 540 ℃ again, be incubated 2.6 hours, take out air cooling and get final product.

Described refining agent by following weight part (kilogram) raw material make: instrument comminuted steel shot 4, clay 10, Wingdale 3, sepiolite 2, Sodium Silicofluoride 2, SODIUMNITRATE 2, vermiculite 5, silicon carbide 9, titanium dioxide 2, fluorite 8, aluminium hydroxide 8, jade powder 3, montmorillonite 2; Preparation method mixes each raw material, is heated to molten state and stirs remove slag, and 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%, 1% nano-carbon powder, after mixing, under 12-15Mpa, 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 the present invention's alloy steel material of resistance to air corrosion is: tensile strength 1156MPa, yield strength 889MPa, unit elongation 14%, relative reduction in area 27%, impact absorbing energy 53.2J, impelling strength 62.1J/cm2, hardness 289HB.

Claims

1. the alloy steel material of resistance to air corrosion, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.3-0.5, silicon 0.1-0.2, manganese 1.3-1.5, molybdenum 0.2-0.5, nickel 1.8-2.1, chromium 0.01-0.03, vanadium 0.005-0.008, copper 7.0-7.5, Ti0.3-0.5, B0.4-0.6, P≤0.030, S≤0.030, surplus are iron.

2. the production method of the alloy steel material of resistance to air corrosion according to claim 1, is characterized in that:

3. the production method of the alloy steel material of resistance to air corrosion according to claim 2, is characterized in that: described casting postheat treatment is: first by room temperature, with 210-230 ℃/h of speed, be warming up to 925-945 ℃, insulation 3-4 hour; With 140-160 ℃/h of speed, be cooled to 630-650 ℃ again, insulation 30-60 minute; With 100-120 ℃/h of speed, be cooled to 310-330 ℃ again, insulation 2-3 hour; With 150-170 ℃/h of speed, be warming up to 530-550 ℃ again, insulation 2-3 hour, takes out air cooling and get final product.

4. the production method of the alloy steel material of resistance to air corrosion 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 10-12, Wingdale 3-4, sepiolite 2-3, Sodium Silicofluoride 2-3, SODIUMNITRATE 1-2, vermiculite 5-6, silicon carbide 9-11, titanium dioxide 2-3, fluorite 6-8, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2; Preparation method mixes each raw material, is heated to molten state and stirs remove slag, and 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.