CN103882310A

CN103882310A - Corrosion-resistant high-carbon steel alloy material and preparation method thereof

Info

Publication number: CN103882310A
Application number: CN201410059352.4A
Authority: CN
Inventors: 黄浩
Original assignee: Wuhu Hongkun Auto Parts Co Ltd
Current assignee: Jilin asachen Machinery Manufacturing Co., Ltd.
Priority date: 2014-02-21
Filing date: 2014-02-21
Publication date: 2014-06-25
Anticipated expiration: 2034-02-21
Also published as: CN103882310B

Abstract

A corrosion-resistant high-carbon steel alloy material comprises the following chemical elements by mass percent: 0.7-1.0 percent of carbon, 0.7-0.9 percent of silicon, 0.2-0.4 percent of copper, 0.05-0.08 percent of aluminum, 3.3-2.5 percent of manganese, 6.0-6.5 percent of Ni, 0.05-0.09 percent of titanium, 0.3-0.5 percent of boron, 0.1-0.3 percent of Mo, 0.002-0.005 percent of niobium, 0.001-0.003 percent of Ta, 0.03-0.05 percent of Co, less than or equal to 0.030 percent of P, less than or equal to 0.030 of S and the balance of iron. The alloy material, which is prepared from the raw materials including niobium and aluminum by reasonably setting the proportion, production process and dispensing order, has the characteristics of very high strength, hardness and wear resistance, low thermosensitivity, low temper brittleness, atmosphere corrosion resistance, and hydrogen, nitrogen and ammonia corrosion resistance at high temperature; the porosity is decreased by 1-2 degrees by adding a refining agent.

Description

A kind of corrosion-resistant high carbon steel alloy material and preparation method thereof

Technical field

The present invention relates to metallic substance preparation field, relate in particular to a kind of corrosion-resistant high carbon steel 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, can't meet the requirement of production in a lot of occasions, 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 corrosion-resistant high carbon steel alloy material and preparation method thereof, this alloy material has the feature of high wear resistance, hardness and wear resistance.

Technical scheme of the present invention is as follows:

A kind of corrosion-resistant high carbon steel alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.7-1.0, silicon 0.7-0.9, copper 0.2-0.4, aluminium 0.05-0.08, manganese 3.3-2.5, nickel 6.0-6.5, titanium 0.05-0.09, boron 0.3-0.5, Mo0.1-0.3, Nb0.002-0.005, Ta0.001-0.003, Co0.03-0.05, P≤0.030, S≤0.030, surplus are iron.

The production method of described corrosion-resistant high carbon steel 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 1:1 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, nickel, copper; (2) aluminium, manganese, Nb; (3) titanium, boron, Ta; (4) other remaining component; The each batch of timed interval of dropping into element is 8-10 minute, after feeding intake, stirs.

Described casting postheat treatment is: be first warming up to 920-930 DEG C by room temperature with 200-230 DEG C/h of speed, insulation 3-4 hour; Be cooled to 630-650 DEG C with 140-160 DEG C/h of speed again, insulation 40-60 minute; Be cooled to 330-350 DEG C with 100-120 DEG C/h of speed again, insulation 2-3 hour; Be warming up to 530-550 DEG C with 150-170 DEG C/h of speed again, insulation 2-3 hour, takes out air cooling and get final product.

Described refining agent is made up of the raw material of following weight part: instrument comminuted steel shot 3-4, attapulgite 100-120, unslaked lime 2-3, nanometer jade powder 3-4, montmorillonite powder 1-2, perlite 95-110, BaCO3 3-4, Sodium Silicofluoride 4-5, Calcium Fluoride (Fluorspan) 2-3; 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 DEG C, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain final product.

Beneficial effect of the present invention

The present invention is by using the material combination such as niobium, aluminium, proportioning and production technique are rationally set, input order is rationally set, the alloy material forming has high intensity, hardness, wear resistance, low heat sensitivity, low temper brittleness, also have the feature of the corrosive nature of atmospheric corrosion resistance and high temperature resistant lower hydrogen, nitrogen, ammonia; And use part scrap iron as raw material, carry heavy alloyed steady quality homogeneous.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 corrosion-resistant high carbon steel alloy material, chemical element composition and mass percent thereof that it contains are: carbon 0.7-1.0, silicon 0.7-0.9, copper 0.2-0.4, aluminium 0.05-0.08, manganese 3.3-2.5, nickel 6.0-6.5, titanium 0.05-0.09, boron 0.3-0.5, Mo0.1-0.3, Nb0.002-0.005, Ta0.001-0.003, Co0.03-0.05, P≤0.030, S≤0.030, surplus are iron.

(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, nickel, copper; (2) aluminium, manganese, Nb; (3) titanium, boron, Ta; (4) other remaining component; The each batch of timed interval of dropping into element is 9 minutes, after feeding intake, stirs.

Described casting postheat treatment is: be first warming up to 925 DEG C by room temperature with 220 DEG C/h of speed, be incubated 3.5 hours; Be cooled to 640 DEG C with 150 DEG C/h of speed again, be incubated 50 minutes; Be cooled to 340 DEG C with 110 DEG C/h of speed again, be incubated 2.5 hours; Be warming up to 540 DEG C with 160 DEG C/h of speed again, be incubated 2.5 hours, take out air cooling and get final product.

Described refining agent by following weight part (kilogram) raw material make: described refining agent by following weight part (kilogram) raw material make: instrument comminuted steel shot 3, attapulgite 100-, unslaked lime 2, nanometer jade powder 3, montmorillonite powder 2, perlite 95, BaCO3 4, Sodium Silicofluoride 4, Calcium Fluoride (Fluorspan) 3; 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 DEG C, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain final product.

The mechanical property of the corrosion-resistant high carbon steel alloy material of the present invention is: tensile strength 81380MPa, yield strength 973MPa, unit elongation 12%, relative reduction in area 22%, impact absorbing energy 48J, impelling strength 58J/cm2, hardness 295HB.

Claims

1. a corrosion-resistant high carbon steel alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.7-1.0, silicon 0.7-0.9, copper 0.2-0.4, aluminium 0.05-0.08, manganese 3.3-2.5, nickel 6.0-6.5, titanium 0.05-0.09, boron 0.3-0.5, Mo0.1-0.3, Nb0.002-0.005, Ta0.001-0.003, Co0.03-0.05, P≤0.030, S≤0.030, surplus are iron.

2. the production method of corrosion-resistant high carbon steel alloy material according to claim 1, is characterized in that:

3. the production method of corrosion-resistant high carbon steel alloy material according to claim 2, is characterized in that: described casting postheat treatment is: be first warming up to 920-930 DEG C by room temperature with 200-230 DEG C/h of speed, insulation 3-4 hour; Be cooled to 630-650 DEG C with 140-160 DEG C/h of speed again, insulation 40-60 minute; Be cooled to 330-350 DEG C with 100-120 DEG C/h of speed again, insulation 2-3 hour; Be warming up to 530-550 DEG C with 150-170 DEG C/h of speed again, insulation 2-3 hour, takes out air cooling and get final product.

4. the production method of corrosion-resistant high carbon steel alloy material according to claim 2, is characterized in that: described refining agent is made up of the raw material of following weight part: instrument comminuted steel shot 3-4, attapulgite 100-120, unslaked lime 2-3, nanometer jade powder 3-4, montmorillonite powder 1-2, perlite 95-110, BaCO3 3-4, Sodium Silicofluoride 4-5, Calcium Fluoride (Fluorspan) 2-3; 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 DEG C, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain final product.