CN105525219A - Molybdenum base alloy steel - Google Patents
Molybdenum base alloy steel Download PDFInfo
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- CN105525219A CN105525219A CN201510858180.1A CN201510858180A CN105525219A CN 105525219 A CN105525219 A CN 105525219A CN 201510858180 A CN201510858180 A CN 201510858180A CN 105525219 A CN105525219 A CN 105525219A
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- steel
- molybdenum
- base alloy
- alloy steel
- molybdenum base
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
Abstract
The invention discloses molybdenum base alloy steel. The molybdenum base alloy steel comprises the following components in percentage by mass: 2.4-3.0% of carbon, 5.0-6.0% of vanadium, 4.0-5.5% of chromium, 4-8% of copper, 5-6% of titanium, 4.0-6.0% of molybdenum, 0.5-1.0% of nickel, 1.0-2.0% of niobium, 0.4-1.0% of silicon, phosphorus less than 0.04%, sulfur less than 0.04%, and the balance of iron. The molybdenum base alloy steel, provided by the invention, has the beneficial effects of increment of contents of molybdenum and vanadium to replace tungsten elements, improvement of hardenability and wear resistance of high-speed steel and satisfaction of mechanical performance requirements.
Description
Technical field
The present invention relates to a kind of molybdenum base alloy steel.
Background technology
Rapid steel is the abbreviation of rapid tool steel, is a kind of compound of complicated component, and rapid steel, except containing except high carbon amounts, also has the alloying constituents such as a large amount of W, Cr, V, Mo; Alloy and carbon define a large amount of carbide, rapid steel is made to have high rigidity, high red hardness, high-wearing feature and enough toughness, drastically increase its cutting speed, the invention of rapid steel makes the speed of cutting medium carbon steel bring up to about 30m/min by 8m/min; Therefore the revolution of Machine Tool Industry is brought.
Along with the continuous change of machined material and the needs of process for processing, people constantly change the composition of rapid steel, have successively occurred Cobalt High Speed Steel, high Molybdenum High Speed Steel M1, tungsten high speed steel M2, high-carbon molybdenum base alloy steel, vulcanization easy cutting rapid steel, super-hard high-speed steel M40 series.At present, rapid steel is usually used in the precision tool such as drill bit, screw tap, saw blade and hobboing cutter, pinion cutter, broaching tool, is particularly useful for manufacturing complicated thin sword and impact-resistant metal cutting tool.
Molybdenum base alloy steel is a kind of new steel grade closely occurred during the last ten years, and molybdenum base alloy steel containing W, does not strengthen the content of carbon simultaneously, forms VC and V4C3, makes rapid steel obtain high hardness and wear resistance.Molybdenum base alloy steel is main adding elements with vanadium, is aided with other alloying elements such as chrome molybdenum, makes full use of vanadium carbon compound (VC) hardness is high, form is good feature to improve toughness and the wear resistance of material.As high-abrasive material of new generation, molybdenum base alloy steel has been used to produce the multiple wearing pieces such as roll, tup, ball grinding machine lining board and rotor block at present.
Facts have proved, the Toughness Ratio rich chromium cast iron of high vanadium wear resistant alloy is high, and wear resistance is more than 3 times of rich chromium cast iron, crack sensitivity is lower than rich chromium cast iron, and the ratio of performance to price is also high, has popularizing application prospect widely, certainly will rich chromium cast iron be substituted, become the main flow of high abrasion resisting material of new generation.This alloy can improve work-ing life and the main frame operational efficiency of wear parts greatly, the complete alternative various antifriction cast iron class material for abrasive wear operating mode.With grinder hammerhead, rolling mill guide wheel, roll etc. that high vanadium wear resistant alloy manufactures, in industry extensive application such as engineering machinery, building materials, mine, electric power, economic results in society are remarkable, right
nationaleconomic development has important promoter action.
Summary of the invention
Object of the present invention provides the molybdenum base alloy steel that a kind of hardness is high, wear resistance is good, and molybdenum base alloy composition of steel mass percent of the present invention is as follows:
Carbon (C) 2.4%-3.0%, vanadium (V) 5.0%-6.0%, chromium (Cr) 4.0%-5.5%, molybdenum (Mo) 4.0%-6.0%, nickel (Ni) 0.5%-1.0%, niobium (Nb) 1.0%-2.0%, silicon (Si) 0.4%-1.0%, phosphorus (P) < 0.04%, sulphur (S) < 0.04%, surplus is iron (Fe).
Carbon (C) has very important impact to the intensity of steel, hardness, hardening capacity and wear resistance.Carbon is the fundamental element forming carbide, and the too low then carbide of content of carbon is few, and wear resistance is low, but the fragility of the too high easy increase material of carbon content, and so the content of carbon will control in certain limit, Integrated comparative, carbon content control is at 2.4%-3.0%.Preferably, carbon content control is at 2.5%-2.8%.
Vanadium (V) is the most remarkable on the impact of rapid steel wear resistance, is conducive to the formation of MC type carbide, and the content improving vanadium can obtain particulate state MC type carbide that is tiny, Dispersed precipitate of taking measurements greatly, thus improves the wear resistance of rapid steel.Content of vanadium in molybdenum base alloy steel of the present invention controls at 5.0%-6.0%.Preferably, content of vanadium controls at 5.6%-5.8%.
Chromium (Cr) can improve the hardening capacity of steel, multiple compounds (Fe is formed with carbon, iron, Cr) 3C, wear resistance can be significantly improved, the matrix of solution strengthening simultaneously, while raising intensity and hardness, do not reduce impact toughness, be one of fundamental element of high-abrasive material, also there is stronger high-temperature oxidation resistant, anti-decarburizating simultaneously.Chromium content in molybdenum base alloy steel of the present invention controls at 4.0%-5.5%.Preferably, chromium content controls at 4.5%-5.3%.
Molybdenum (Mo) can form enough proeutectoid carbides in rapid steel, obtains high molybdenum martensite by high temperature solid solution quenching.Meanwhile, molybdenum can reduce the size of carbide, thinning microstructure, thus improves Wear Resistance, and the molybdenum content in molybdenum base alloy steel of the present invention controls at 4.0%-6.0%.Preferably, molybdenum content controls at 4.2%-5.7%.
Niobium (Nb) is the element that a kind of strong promotion MC phase is formed, and the object of adding niobium is to replace with niobium the formation that vanadium participates in MC type carbide, forces vanadium to be solid-solubilized in matrix, to improve the secondary hardening ability of material.After vanadium, niobium add, the wear resistance of hypoeutectic composition rapid steel can be significantly improved.Content of niobium in molybdenum base alloy steel of the present invention controls at 1.0%-2.0%.Preferably, content of niobium controls at 1.4%-1.9%.
Nickel (Ni) can improve the intensity of steel, and does not reduce its plasticity, improves the low-temperature flexibility of steel, reduce the critical cooling velocity of steel, improve the hardening capacity of steel, expand austenite phase field simultaneously, be the effective element of austenitizing, the nickel content in molybdenum base alloy steel of the present invention is 0.5%-1.0%.Preferably, nickel content controls at 0.6%-0.8%.
Silicon (Si) energy reinforced ferrite, improves intensity and the hardness of steel, reduces the critical cooling velocity of steel, improve the hardening capacity of steel, increase steel belt roof bolt stability, the thermotolerance of raising steel.Combine with chromium, molybdenum, can improve erosion resistance and the oxidation-resistance of steel, the silicone content in molybdenum base alloy steel of the present invention is 0.4%-1.0%.Preferably, silicone content controls at 0.6%-0.8%.
Sulphur (S) and phosphorus (P) are all the harmful elements in steel, and its content all requires < 0.04%.
Molybdenum base alloy steel provided by the invention, the content adding molybdenum and vanadium, to replace hardening capacity and the wear resistance that W elements increases rapid steel, meets again the performance requriements of its mechanics simultaneously.
Molybdenum base alloy steel preparation process in the present invention is as follows: utilize 100kg medium-frequency induction furnace to carry out melting, furnace charge used is load weighted steel scrap and the pig iron, ferrochrome, ferrosilicon is added when temperature reaches 1420 DEG C time, when molten steel temperature reaches 1520 DEG C, add molybdenum-iron, Ni and ferro-niobium, add vanadium iron when 1560 DEG C, object is to reduce scaling loss, stir, insert aluminum strip by the amount of 1kg aluminum strip/ton molten steel and carry out deoxidation; Be placed in casting ladle by rare-earth element cerium and breed molten steel, when going out molten steel, temperature is not less than 1560 DEG C, when temperature maintains 1450-1480 DEG C, directly can pour into roll on whizzer.According to the effect of its reality, its hardness value is 62-66HRC, notched bar impact strength 14-18J/cm2, tensile strength 950-1100MPa.Its hardness is high, dense structure, and wear resisting property is excellent.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1
100kg medium-frequency induction furnace is utilized to carry out melting, furnace charge used is load weighted steel scrap and the pig iron, ferrochrome, ferrosilicon is added when temperature reaches 1420 DEG C time, when molten steel temperature reaches 1520 DEG C, add molybdenum-iron, Ni and ferro-niobium, add vanadium iron when 1560 DEG C, object is to reduce scaling loss, stir, insert aluminum strip by the amount of 1kg aluminum strip/ton molten steel and carry out deoxidation; Be placed in casting ladle by rare-earth element cerium and breed molten steel, when going out molten steel, temperature is not less than 1560 DEG C, when temperature maintains 1450-1480 DEG C, directly can pour into roll on whizzer.Foundry goods after cast needs to heat-treat, and its thermal treatment process is: 1000-1050 DEG C of quench hot, 480-530 DEG C of tempering.Roll dense structure, flawless, wear resistance reaches 4.6 times of rich chromium cast iron, and after testing, its hardness value is 64HRC, notched bar impact strength 15-17J/cm2, tensile strength 960-1000MPa, and mechanical property meets service requirements.
Embodiment 2
100kg medium-frequency induction furnace is utilized to carry out melting, furnace charge used is load weighted steel scrap and the pig iron, ferrochrome, ferrosilicon is added when temperature reaches 1420 DEG C time, when molten steel temperature reaches 1520 DEG C, add molybdenum-iron, Ni and ferro-niobium, add vanadium iron when 1560 DEG C, object is to reduce scaling loss, stir, insert aluminum strip by the amount of 1kg aluminum strip/ton molten steel and carry out deoxidation; Be placed in casting ladle by rare-earth element cerium and breed molten steel, when going out molten steel, temperature is not less than 1560 DEG C, when temperature maintains 1450-1480 DEG C, directly can pour into roll on whizzer.Foundry goods after cast needs to heat-treat, and its thermal treatment process is: 1000-1050 DEG C of quench hot, 480-530 DEG C of tempering.Roll dense structure, flawless, wear resistance reaches 4.1 times of rich chromium cast iron, and after testing, its hardness value is 66HRC, notched bar impact strength 14-16J/cm2, tensile strength 1020-1080MPa, and mechanical property meets service requirements.
Embodiment 3
100kg medium-frequency induction furnace is utilized to carry out melting, furnace charge used is load weighted steel scrap and the pig iron, ferrochrome, ferrosilicon is added when temperature reaches 1420 DEG C time, when molten steel temperature reaches 1520 DEG C, add molybdenum-iron, Ni and ferro-niobium, add vanadium iron when 1560 DEG C, object is to reduce scaling loss, stir, insert aluminum strip by the amount of 1kg aluminum strip/ton molten steel and carry out deoxidation; Be placed in casting ladle by rare-earth element cerium and breed molten steel, when going out molten steel, temperature is not less than 1560 DEG C, when temperature maintains 1450-1480 DEG C, directly can pour into roll on whizzer.Foundry goods after cast needs to heat-treat, and its thermal treatment process is: 1000-1050 DEG C of quench hot, 480-530 DEG C of tempering.Roll dense structure, flawless, wear resistance reaches 3.4 times of rich chromium cast iron, and after testing, its hardness value is 62HRC, notched bar impact strength 16-18J/cm2, tensile strength 1000-1050MPa, and mechanical property meets service requirements.
Embodiment 4
100kg medium-frequency induction furnace is utilized to carry out melting, furnace charge used is load weighted steel scrap and the pig iron, ferrochrome, ferrosilicon is added when temperature reaches 1420 DEG C time, when molten steel temperature reaches 1520 DEG C, add molybdenum-iron, Ni and ferro-niobium, add vanadium iron when 1560 DEG C, object is to reduce scaling loss, stir, insert aluminum strip by the amount of 1kg aluminum strip/ton molten steel and carry out deoxidation; Be placed in casting ladle by rare-earth element cerium and breed molten steel, when going out molten steel, temperature is not less than 1560 DEG C, when temperature maintains 1450-1480 DEG C, directly can pour into roll on whizzer.Foundry goods after cast needs to heat-treat, and its thermal treatment process is: 1000-1050 DEG C of quench hot, 480-530 DEG C of tempering.Roll dense structure, flawless, wear resistance reaches 3.8 times of rich chromium cast iron, and after testing, its hardness value is 63.5HRC, notched bar impact strength 15.5-17.5J/cm2, tensile strength 980-1020MPa, and mechanical property meets service requirements.
Embodiment 5
100kg medium-frequency induction furnace is utilized to carry out melting, furnace charge used is load weighted steel scrap and the pig iron, ferrochrome, ferrosilicon is added when temperature reaches 1420 DEG C time, when molten steel temperature reaches 1520 DEG C, add molybdenum-iron, Ni and ferro-niobium, add vanadium iron when 1560 DEG C, object is to reduce scaling loss, stir, insert aluminum strip by the amount of 1kg aluminum strip/ton molten steel and carry out deoxidation; Be placed in casting ladle by rare-earth element cerium and breed molten steel, when going out molten steel, temperature is not less than 1560 DEG C, when temperature maintains 1450-1480 DEG C, directly can pour into roll on whizzer.Foundry goods after cast needs to heat-treat, and its thermal treatment process is: 1000-1050 DEG C of quench hot, 480-530 DEG C of tempering.Roll dense structure, flawless, wear resistance reaches 4.3 times of rich chromium cast iron, and after testing, its hardness value is 64.5HRC, notched bar impact strength 14.5-16.5J/cm2, tensile strength 1040-1100MPa, and mechanical property meets service requirements.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a molybdenum base alloy steel, is characterized in that: its Ingredient percent is as follows:
Carbon 2.4%-3.0%, vanadium 5.0%-6.0%, chromium 4.0%-5.5%, copper 4%-8%, titanium 5%-6%, molybdenum 4.0%-6.0%, nickel 0.5%-1.0%, niobium 1.0%-2.0%, silicon 0.4%-1.0%, phosphorus < 0.04%, sulphur < 0.04%, surplus is iron.
2. molybdenum base alloy steel according to claim 1, is characterized in that: wherein carbon content is 2.5%-2.8%.
3. molybdenum base alloy steel according to claim 1, is characterized in that: wherein content of vanadium is 5.6%-5.8%.
4. molybdenum base alloy steel according to claim 1, is characterized in that: wherein chromium content is 4.5%-5.3%.
5. molybdenum base alloy steel according to claim 1, is characterized in that: wherein molybdenum content is 4.2%-5.7%.
6. molybdenum base alloy steel according to claim 1, is characterized in that: wherein nickel content is 0.6%-0.8%.
7. molybdenum base alloy steel according to claim 1, is characterized in that: wherein content of niobium is 1.4%-1.9%.
8. molybdenum base alloy steel according to claim 1, is characterized in that: wherein silicone content is 0.6%-0.8%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510858180.1A CN105525219A (en) | 2015-11-30 | 2015-11-30 | Molybdenum base alloy steel |
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| CN201510858180.1A CN105525219A (en) | 2015-11-30 | 2015-11-30 | Molybdenum base alloy steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109266952A (en) * | 2018-10-12 | 2019-01-25 | 东莞市煜田新材料有限公司 | A kind of titanium master alloy steel and titanium master alloy powdered steel sintering process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425791A (en) * | 2003-01-09 | 2003-06-25 | 江苏省机电研究所有限公司 | Wear resistant cast iron containing titanium-chromium and its heat treatment process |
| CN102660714A (en) * | 2012-06-05 | 2012-09-12 | 河南理工大学 | High-carbon and high-vanadium wear-resistant steel |
| CN102978536A (en) * | 2012-12-27 | 2013-03-20 | 河南理工大学 | High-vanadium high-speed steel |
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- 2015-11-30 CN CN201510858180.1A patent/CN105525219A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425791A (en) * | 2003-01-09 | 2003-06-25 | 江苏省机电研究所有限公司 | Wear resistant cast iron containing titanium-chromium and its heat treatment process |
| CN102660714A (en) * | 2012-06-05 | 2012-09-12 | 河南理工大学 | High-carbon and high-vanadium wear-resistant steel |
| CN102978536A (en) * | 2012-12-27 | 2013-03-20 | 河南理工大学 | High-vanadium high-speed steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109266952A (en) * | 2018-10-12 | 2019-01-25 | 东莞市煜田新材料有限公司 | A kind of titanium master alloy steel and titanium master alloy powdered steel sintering process |
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Application publication date: 20160427 |