CN104195472A - Tungsten-vanadium-molybdenum alloy steel and preparation method thereof - Google Patents

Abstract

The invention discloses tungsten-vanadium-molybdenum alloy steel and a preparation method thereof. The tungsten-vanadium-molybdenum alloy steel is prepared from the following chemical elements and components in percentage by mass: 0.48-0.55% of carbon, 0.2-0.5% of silicon, 0.2-0.3% of manganese, 0.02-0.035% of chromium, 0.024-0.028% of tungsten, 0.01-0.03% of vanadium, 0.035-0.048% of molybdenum, 0.0046-0.0053% of scandium, 0.27-0.35% of aluminum, 0.078-0.092% of boron, 0.0056-0.0067% of palladium, 0.2-0.35% of sulfur, 0.45-0.55% of phosphorus and the balance of iron. The tungsten-vanadium-molybdenum alloy steel adopts a low-alloy principle, and the proportioning of alloy steel materials is changed so that the content of tungsten-vanadium-molybdenum is increased; the tungsten-vanadium-molybdenum is made into a part of alloy blocks which are further refined to obtain the alloy steel, so that the internal atom structure of the alloy steel is improved, and the prepared alloy has the characteristics of high strength, impact resistance, corrosion resistance and high thermal strength.

Description

A kind of tungsten vanadium molybdenum alloy steel and manufacture method thereof

 

Technical field

The present invention relates to a kind of steel alloy and manufacture method thereof, particularly a kind of manufacture method of tungsten vanadium molybdenum alloy steel.

 

Background technology

So far, although steel alloy technology is greatly developed, be applicable in all trades and professions, 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, cost 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 manufacture method of tungsten vanadium molybdenum alloy steel.

The present invention adopts following technical scheme:

Tungsten vanadium molybdenum alloy steel, chemical element composition and mass percent thereof that it contains are: carbon 0.48-0.55%, silicon 0.2-0.5%, manganese 0.2-0.3%, chromium 0.02-0.035%, tungsten 0.024-0.028%, vanadium 0.01-0.03%, molybdenum 0.035-0.048%, scandium 0.0046-0.0053%, aluminium 0.27-0.35%, boron 0.078-0.092%, palladium 0.0056-0.0067%, sulphur 0.2-0.35%, phosphorus 0.45-0.55%, surplus are iron.

The manufacture method of tungsten vanadium molybdenum alloy steel, comprises the following steps:

(1) steel scrap, ferrosilicon, ferromanganese, ferrochrome being put into electric furnace by equal proportion melts, add again scrap iron, after molten steel melts clearly, control carbon content and reach requirement, after stokehold adjusting component is qualified, melt temperature is increased to 1480-1550 ℃, adds it to mix total amount 0.4-0.8% Si-Al-Ba-Ca powder and carry out pre-deoxidation, add it to mix 0.2-0.5% aluminium powder and the 2.1-2.3% attapulgite final deoxygenation of total amount;

(2) by the mass percent of chemical element composition, take tungsten powder, vanadium oxide, molybdenum powder; Fully mix, then under the pressure of 800-1000MPa, carry out press-powder shaping, then at the temperature of 1250-1420 ℃, carry out sintering, by crossing 200-400 mesh sieve after the crushing material after sintering, make tungsten vanadium molybdenum alloy powder;

(3) step (2) tungsten vanadium molybdenum alloy powder is added in step (1), after melting is uniformly mixed, then by constitutive material mass percent, add other residue alloying elements wherein, refining 30-40 minute, controls temperature 1430-1670 ℃, then sampling, after analysis ingredient, adjusting component, fusing 25-35min, casting, tapping temperature is 1490-1510 ℃, and after tapping, material is heat-treated, quenching temperature 850-920 ℃, tempering temperature 430-510 ℃, tempering time 60-80min.

Beneficial effect of the present invention:

The present invention adopts low-alloy principle, by changing the proportioning of alloy steel material, increase the content of tungsten vanadium molybdenum, the present invention first makes alloy part piece by tungsten vanadium molybdenum, by refining, make steel alloy again, strengthen the inner atomic structure of steel alloy, the alloy of formation has high strength, shock-resistant, wear-resisting, the strong high feature of heat.

 

Embodiment

Embodiment 1: tungsten vanadium molybdenum alloy steel, chemical element composition and mass percent thereof that it contains are: carbon 0.52%, silicon 0.33%, manganese 0.25%, chromium 0.027%, tungsten 0.026%, vanadium 0.02%, molybdenum 0.043%, scandium 0.005%, aluminium 0.31%, boron 0.085%, palladium 0.0062%, sulphur 0.28%, phosphorus 0.5%, surplus are iron.

The manufacture method of tungsten vanadium molybdenum alloy steel, comprises the following steps:

(1) steel scrap, ferrosilicon, ferromanganese, ferrochrome being put into electric furnace by equal proportion melts, add again scrap iron, after molten steel melts clearly, control carbon content and reach requirement, after stokehold adjusting component is qualified, melt temperature is increased to 1500 ℃, adds it to mix total amount 0.6% Si-Al-Ba-Ca powder and carry out pre-deoxidation, add it to mix 0.3% aluminium powder and the 2.2% attapulgite final deoxygenation of total amount;

(2) by the mass percent of chemical element composition, take tungsten powder, vanadium oxide, molybdenum powder; Fully mix, then under the pressure of 900MPa, carry out press-powder shaping, then at the temperature of 1320 ℃, carry out sintering, by crossing 400 mesh sieves after the crushing material after sintering, make tungsten vanadium molybdenum alloy powder;

(3) step (2) tungsten vanadium molybdenum alloy powder is added in step (1), after melting is uniformly mixed, then by constitutive material mass percent, add other residue alloying elements wherein, refining 35 minutes, controls 1540 ℃ of temperature, then sampling, after analysis ingredient, adjusting component, fusing 25-35min, casting, tapping temperature is 1510 ℃, and after tapping, material is heat-treated, 880 ℃ of quenching temperatures, 480 ℃ of tempering temperatures, tempering time 70min.

The present invention manufacture alloy steel material testing data: tensile strength sigma b>=1315MPa; Yield strength σ _0.2>=1080MPa; Impact absorbing energy 57.8J, low-temperature impact toughness σ ku (40 ℃)>=54.6J/cm ²; Hardness HRC 54-57.

Claims (2)

1. a tungsten vanadium molybdenum alloy steel, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.48-0.55%, silicon 0.2-0.5%, manganese 0.2-0.3%, chromium 0.02-0.035%, tungsten 0.024-0.028%, vanadium 0.01-0.03%, molybdenum 0.035-0.048%, scandium 0.0046-0.0053%, aluminium 0.27-0.35%, boron 0.078-0.092%, palladium 0.0056-0.0067%, sulphur 0.2-0.35%, phosphorus 0.45-0.55%, surplus are iron.

2. a manufacture method for tungsten vanadium molybdenum alloy steel as claimed in claim 1, is characterized in that comprising the following steps:

(1) steel scrap, ferrosilicon, ferromanganese, ferrochrome being put into electric furnace by equal proportion melts, add again scrap iron, after molten steel melts clearly, control carbon content and reach requirement, after stokehold adjusting component is qualified, melt temperature is increased to 1480-1550 ℃, adds it to mix total amount 0.4-0.8% Si-Al-Ba-Ca powder and carry out pre-deoxidation, add it to mix 0.2-0.5% aluminium powder and the 2.1-2.3% attapulgite final deoxygenation of total amount;

(2) by the mass percent of chemical element composition, take tungsten powder, vanadium oxide, molybdenum powder; Fully mix, then under the pressure of 800-1000MPa, carry out press-powder shaping, then at the temperature of 1250-1420 ℃, carry out sintering, by crossing 200-400 mesh sieve after the crushing material after sintering, make tungsten vanadium molybdenum alloy powder;

(3) step (2) tungsten vanadium molybdenum alloy powder is added in step (1), after melting is uniformly mixed, then by constitutive material mass percent, add other residue alloying elements wherein, refining 30-40 minute, controls temperature 1430-1670 ℃, then sampling, after analysis ingredient, adjusting component, fusing 25-35min, casting, tapping temperature is 1490-1510 ℃, and after tapping, material is heat-treated, quenching temperature 850-920 ℃, tempering temperature 430-510 ℃, tempering time 60-80min.