CN103667941A

CN103667941A - Alloy steel material for rotor of cam rotor pump and preparation method thereof

Info

Publication number: CN103667941A
Application number: CN201310550366.1A
Authority: CN
Inventors: 张超
Original assignee: 张超
Current assignee: Jiangsu Jianxing Traffic Engineering 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: CN103667941B

Abstract

The invention relates to an alloy steel material for a rotor of a cam rotor pump, which comprises the following chemical element components in percentage by mass: 0.2-0.3% of carbon, 0.2-0.4% of silicon, 1.2-1.5% of titanium, 0.02-0.05% of boron, 4.2-4.5% of chromium, 2.2-2.5% of manganese, 0.4-0.6% of molybdenum, 0.2-0.4% of zinc, 0.02-0.05% of In, 0.3-0.5% of As, 0.08-0.12% of Hf, 0.15-0.18% of Bi, no more than 0.030% of P, no more than 0.030% of S and the balance of iron. According to the invention, the alloy steel formed by combination of multiple raw materials such as boron, hafnium and the like has the characteristics of high strength, high hardness, favorable wear resistance and corrosion resistance; part of waste iron is used as a raw material and is subjected to secondary refining, so that the quality is stabler and more uniform, and the content of harmful elements such as sulfur, phosphorus and the like is lower; and a refining agent is added, so that the porosity is reduced by 1-2 levels, and the oxide inclusion is approximately at Level 2.

Description

A kind of field spider pump rotor alloy steel material and preparation method thereof

Technical field

The present invention relates to metallic substance preparation field, relate in particular to a kind of field spider pump rotor alloy steel 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 contains with Types Below: the steel alloy of the various excellent performances such as quenched and tempered steel, spring steel, roller bearing steel, tool steel, property steel, high temperature steel, low-temperature steel.

The steel alloy that pump valve is used has varied, technology has very much progress, but still has a lot of problems to exist, as wear resistance, hardness, rustless property, corrosion resistance nature, high and low temperature resistance, fragility, toughness etc., 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 field spider pump rotor alloy steel material and preparation method thereof, this alloy material has that wear resistance is good, hardness is high, intensity is high and corrosion resistant feature.

Technical scheme of the present invention is as follows:

A field spider pump rotor alloy steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.3, silicon 0.2-0.4, titanium 1.2-1.5, boron 0.02-0.05, chromium 4.2-4.5, manganese 2.2-2.5, molybdenum 0.4-0.6, zinc 0.2-0.4, In0.02-0.05, As0.3-0.5, Hf0.08-0.12, Bi0.15-0.18, P≤0.030, S≤0.030, surplus are iron.

The production method of described field spider pump rotor alloy steel material, is characterized in that:

(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1-2 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;

(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, chromium, Hf; (2) titanium, zinc, In; (3) boron, manganese; (4) other remaining component; The timed interval that each batch drops into element is 14-17 minute, after feeding intake, stirs.

Described casting postheat treatment is: first by room temperature, with 180-200 ℃/h of speed, be warming up to 470-495 ℃, and insulation 60-80 minute, then continue to be warming up to 925-935 ℃ with 180-200 ℃/h of speed insulation 3-5 hour; With 130-150 ℃/h of speed, be cooled to 700-720 ℃ again, insulation 50-70 minute, then with 130-150 ℃/h of speed, be cooled to 610-620 ℃, insulation 50-70 minute; With 110-125 ℃/h of speed, be cooled to 330-350 ℃ again, insulation 3-4 hour; With 140-160 ℃/h of speed, be warming up to 360-380 ℃ again, then be cooled to 220-240 ℃ with 60-70 ℃/h of speed, then be warming up to 540-560 ℃ with 130-150 ℃/h of speed, insulation 3-4 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, Repone K 5-8, Calcium Fluoride (Fluorspan) 3-5, Graphite Powder 99 5-8, Sodium Silicofluoride 8-10, jade powder 3-4, montmorillonite 1-2, lazurite 3-5, potassium felspar sand 3-5, titanium dioxide 1-2, diatomite in powder 3-4, Sodium Silicofluoride 1-2, SODIUMNITRATE 2-3; 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, by using the plurality of raw materials such as boron, hafnium to combine, rationally arranges proportioning raw materials and production technique, and input order is rationally set, and rationally controls casting postheat treatment temperature, and the steel alloy of formation has high strength, high rigidity, good, the corrosion resistant feature of wear resistance; Use part scrap iron as raw material, and through secondary refining, make more stable uniform of quality, the harmful elements such as sulphur phosphorus are lower.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 field spider pump rotor alloy steel material, chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.3, silicon 0.2-0.4, titanium 1.2-1.5, boron 0.02-0.05, chromium 4.2-4.5, manganese 2.2-2.5, molybdenum 0.4-0.6, zinc 0.2-0.4, In0.02-0.05, As0.3-0.5, Hf0.08-0.12, Bi0.15-0.18, P≤0.030, S≤0.030, surplus are iron.

The production method of described field spider pump rotor alloy steel material is:

(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1.2 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;

(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, chromium, Hf; (2) titanium, zinc, In; (3) boron, manganese; (4) other remaining component; The timed interval that each batch drops into element is 16 minutes, after feeding intake, stirs.

Described casting postheat treatment is: first by room temperature, with 190 ℃/h of speed, be warming up to 485 ℃, be incubated 70 minutes, then continue to be warming up to 930 ℃ with 190 ℃/h of speed, be incubated 4 hours; With 140 ℃/h of speed, be cooled to 710 ℃ again, be incubated 60 minutes, then be cooled to 615 ℃ with 140 ℃/h of speed, be incubated 60 minutes; With 120 ℃/h of speed, be cooled to 340 ℃ again, be incubated 3.5 hours; With 150 ℃/h of speed, be warming up to 370 ℃ again, then be cooled to 230 ℃ with 65 ℃/h of speed, then be warming up to 550 ℃ with 140 ℃/h of speed, be incubated 3.6 hours, take out air cooling and get final product.

Described refining agent by following weight part (kilogram) raw material make: instrument comminuted steel shot 3, Repone K 6, Calcium Fluoride (Fluorspan) 4, Graphite Powder 99 7, Sodium Silicofluoride 9, jade powder 3, montmorillonite 1.5, lazurite 4, potassium felspar sand 4, titanium dioxide 1.5, diatomite in powder 3.5, Sodium Silicofluoride 1.5, SODIUMNITRATE 2.5; Preparation method mixes each raw material, is heated to molten state, then, is poured into Quench in pure water, then is ground into 150 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 3%, 2% nano-carbon powder, after mixing, under 11Mpa, be pressed into base, then, at 930 ℃, calcine 3.5 hours, cooling after, then be ground into 200 order powder, obtain.

The mechanical property of field spider pump rotor alloy steel material of the present invention is: tensile strength 1350MPa, yield strength 953MPa, unit elongation 13%, relative reduction in area 22%, impact absorbing energy 54J, impelling strength 63J/cm2, hardness 276HB.

Claims

1. a field spider pump rotor alloy steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.2-0.3, silicon 0.2-0.4, titanium 1.2-1.5, boron 0.02-0.05, chromium 4.2-4.5, manganese 2.2-2.5, molybdenum 0.4-0.6, zinc 0.2-0.4, In0.02-0.05, As0.3-0.5, Hf0.08-0.12, Bi0.15-0.18, P≤0.030, S≤0.030, surplus are iron.

2. the production method of field spider pump rotor alloy steel material according to claim 1, is characterized in that:

3. the production method of field spider pump rotor alloy steel material according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 180-200 ℃/h of speed, be warming up to 470-495 ℃, insulation 60-80 minute, continue to be again warming up to 925-935 ℃ with 180-200 ℃/h of speed insulation 3-5 hour; With 130-150 ℃/h of speed, be cooled to 700-720 ℃ again, insulation 50-70 minute, then with 130-150 ℃/h of speed, be cooled to 610-620 ℃, insulation 50-70 minute; With 110-125 ℃/h of speed, be cooled to 330-350 ℃ again, insulation 3-4 hour; With 140-160 ℃/h of speed, be warming up to 360-380 ℃ again, then be cooled to 220-240 ℃ with 60-70 ℃/h of speed, then be warming up to 540-560 ℃ with 130-150 ℃/h of speed, insulation 3-4 hour, takes out air cooling and get final product.

4. the production method of field spider pump rotor alloy steel 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, Repone K 5-8, Calcium Fluoride (Fluorspan) 3-5, Graphite Powder 99 5-8, Sodium Silicofluoride 8-10, jade powder 3-4, montmorillonite 1-2, lazurite 3-5, potassium felspar sand 3-5, titanium dioxide 1-2, diatomite in powder 3-4, Sodium Silicofluoride 1-2, SODIUMNITRATE 2-3; 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.