CN111041375A - High-strength antioxidant alloy material and preparation method thereof - Google Patents

Abstract

The invention discloses a high-strength anti-oxidation alloy material and a preparation method thereof, the main formula of the high-strength anti-oxidation alloy material comprises 1.2% of carbon, 0.65% of silicon, 1.3% of manganese, 1.6% of chromium, 0.2% of molybdenum, 0.1% of nickel, 1.2% of aluminum, 0.5% of copper, 0.03% of titanium, 0.06% of vanadium, 0.001% of cerium, 0.003% of boron, 0.05% of cobalt and 0.03% of aluminum, namely, after the first pressurization, the pressure is maintained for a period of time, then the pressure is unloaded, then the workpiece is pressurized again by the pressure higher than the first pressure, the pressure is maintained for a period of time, then the pressure is unloaded to prepare demoulding, the workpiece after demoulding does not have the phenomenon of cracking, thus the density of the pressed compact can be improved by adopting the secondary pressing to the primary pressing, the pressed compact basically has no cracks, thereby solving the problem that the pressed blank of the prior high-strength anti-oxidation alloy material is likely to have cracks after being pressed.

Description

High-strength antioxidant alloy material and preparation method thereof

Technical Field

The invention belongs to the technical field of alloy materials, and particularly relates to a high-strength antioxidant alloy material and a preparation method thereof.

Background

The alloy material is made of hard compound of refractory metal and binding metal by powder metallurgy process, and has a series of excellent properties of high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, especially high hardness and wear resistance.

The prior high-strength oxidation-resistant alloy material method has the following problems: the existing high-strength anti-oxidation alloy material is generally pressurized once when pressurized, so that cracks can appear on a pressed blank during processing, and the problem of certain limitation is brought to the use of the alloy material.

Disclosure of Invention

The invention aims to provide a high-strength antioxidant alloy material and a preparation method thereof, which aim to solve the problem that cracks can appear in a pressed blank of the conventional high-strength antioxidant alloy material after pressurization in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

the high-strength antioxidant alloy material mainly comprises 1.2% of carbon, 0.65% of silicon, 1.3% of manganese, 1.6% of chromium, 0.2% of molybdenum, 0.1% of nickel, 1.2% of aluminum, 0.5% of copper, 0.03% of titanium, 0.06% of vanadium, 0.001% of cerium, 0.003% of boron, 0.05% of cobalt and 0.03% of aluminum.

Preferably, the preparation steps of the high-strength anti-oxidation alloy material are as follows:

step one, weighing 1.2% of carbon, 0.65% of silicon, 1.3% of manganese, 1.6% of chromium, 0.2% of molybdenum, 0.1% of nickel, 1.2% of aluminum, 0.5% of copper, 0.03% of titanium, 0.06% of vanadium, 0.001% of cerium, 0.003% of boron, 0.05% of cobalt and 0.03% of aluminum;

step two, firstly putting 0.65 percent of silicon, 1.3 percent of manganese and 1.2 percent of carbon in the composition obtained by calculation into a smelting furnace for smelting, then sequentially adding 1.6 percent of chromium, 0.2 percent of molybdenum, 0.1 percent of nickel, 1.2 percent of aluminum, 0.5 percent of copper, 0.03 percent of titanium, 0.06 percent of vanadium, 0.001 percent of cerium, 0.003 percent of boron and 0.05 percent of cobalt, heating to 1250-year 1350 ℃, then adding aluminum, and preserving heat for 1.5 hours;

step three, casting the obtained alloy liquid at 1100-1150 ℃, and annealing after cooling to 300-350 ℃;

step four, placing the cast product in an annealing furnace with the temperature of 870 ℃ and 890 ℃, preserving heat for 3.5 hours, discharging, and cooling by air at the air cooling speed of not more than 1.2 ℃/min;

step five, quenching treatment, namely placing the steel plate in a quenching furnace at 930-DEG C and 950 ℃, preserving heat for 2 hours, then carrying out quenching treatment of the quenching liquid at constant temperature by using an aqueous quenching liquid, keeping the temperature of the quenching liquid between 130-DEG C and 150-DEG C during quenching, and carrying out tempering treatment when the quenching temperature reaches 180-DEG C and 200-DEG C;

step six, tempering treatment, namely preserving heat in a tempering furnace at the temperature of 250 +/-10 ℃ for 2.5 hours and then naturally cooling;

step seven, heating the alloy casting to the highest temperature on the premise of not melting, preserving heat for a long time, and slowly cooling after various elements in the alloy are diffused and tend to be uniformly distributed;

and step eight, pressing the mixture by using a common steel die, wherein the pressed compact is a cuboid bending-resistant strip sample, and the pressing process adopts a secondary pressurization method, namely, after the primary pressurization, the pressure is maintained for 2min, then the pressure is unloaded, and then the pressure is again increased by 80 times of the primary pressure, and the pressure is maintained for 1 min. Then unloading the pressure to prepare for demoulding;

and step nine, guiding the mixture subjected to demoulding into a forming device for forming, then carrying out shot blasting on the casting for 20-25 minutes, and removing the oxide skin, sand grains and coating shells on the surface of the casting.

Preferably, the alloy material has the following main characteristics:

wide technological characteristics

The primary process characteristics of steel bonded cemented carbides are machinability and heat treatability. The workability of the steel bonded cemented carbide depends on the content of the alloy matrix, and also on the properties and state of the matrix, and another important process characteristic of the steel bonded cemented carbide is its malleability. The forging not only can deform the alloy, but also can improve the structure of the material, and the weldability is another important technical characteristic of the steel bonded hard alloy. The steel-bonded cemented carbide can be welded not only to a steel material by various welding methods such as butt welding, insert welding, arc welding, vacuum diffusion welding, butt welding, etc., but also to alloys themselves.

Second, good physical and mechanical properties

The steel bonded hard alloy has the most important performance of high hardness in a hardened state, the wear resistance of the steel bonded hard alloy is equivalent to that of hard alloy with high cobalt content, and the steel bonded hard alloy has higher toughness compared with the hard alloy, and the steel bonded hard alloy has higher rigidity, elastic modulus, bending strength and compressive strength compared with steel, thereby showing good comprehensive performance of the steel bonded hard alloy. In addition, the steel bonded hard alloy also has a series of beneficial physical properties such as lower specific gravity, higher specific strength, good self-lubricating property, high damping characteristic and natural frequency, thermal expansion coefficient similar to that of steel and the like.

Thirdly, excellent chemical stability

The steel bonded hard alloy has excellent chemical stability, and can resist high temperature, oxidation and corrosion of various media such as atmosphere, gas, seawater, oil, acid, alkali, salt and the like. The corrosion resistance of the steel bonded hard alloy depends on the type of the matrix, so that the proper steel or alloy can be selected as the binding phase according to different requirements, and the steel or alloy has corresponding corrosion resistance.

Compared with the prior art, the invention provides a high-strength antioxidant alloy material and a preparation method thereof, and the high-strength antioxidant alloy material has the following beneficial effects:

the pressing process adopts a secondary pressing method, namely after the first pressing, the pressure is maintained for a period of time, then the pressure is unloaded, then the workpiece is pressurized again with the pressure higher than the first pressure, the pressure is maintained for a period of time, then the pressure is unloaded for preparing demoulding, and the workpiece after demoulding does not have the phenomenon of cracking.

Detailed Description

The invention provides a technical scheme that:

the high-strength antioxidant alloy material is prepared with carbon in 1.2%, silicon in 0.65%, manganese in 1.3%, chromium in 1.6%, molybdenum in 0.2%, nickel in 0.1%, aluminum in 1.2%, copper in 0.5%, titanium in 0.03%, vanadium in 0.06%, cerium in 0.001%, boron in 0.003%, cobalt in 0.05% and aluminum in 0.03%.

The preparation steps of the high-strength anti-oxidation alloy material are as follows:

step one, weighing 1.2% of carbon, 0.65% of silicon, 1.3% of manganese, 1.6% of chromium, 0.2% of molybdenum, 0.1% of nickel, 1.2% of aluminum, 0.5% of copper, 0.03% of titanium, 0.06% of vanadium, 0.001% of cerium, 0.003% of boron, 0.05% of cobalt and 0.03% of aluminum;

step two, firstly putting 0.65 percent of silicon, 1.3 percent of manganese and 1.2 percent of carbon in the composition obtained by calculation into a smelting furnace for smelting, then sequentially adding 1.6 percent of chromium, 0.2 percent of molybdenum, 0.1 percent of nickel, 1.2 percent of aluminum, 0.5 percent of copper, 0.03 percent of titanium, 0.06 percent of vanadium, 0.001 percent of cerium, 0.003 percent of boron and 0.05 percent of cobalt, heating to 1250-year 1350 ℃, then adding aluminum, and preserving heat for 1.5 hours;

step three, casting the obtained alloy liquid at 1100-1150 ℃, and annealing after cooling to 300-350 ℃;

step four, placing the cast product in an annealing furnace with the temperature of 870 ℃ and 890 ℃, preserving heat for 3.5 hours, discharging, and cooling by air at the air cooling speed of not more than 1.2 ℃/min;

step five, quenching treatment, namely placing the steel plate in a quenching furnace at 930-DEG C and 950 ℃, preserving heat for 2 hours, then carrying out quenching treatment of the quenching liquid at constant temperature by using an aqueous quenching liquid, keeping the temperature of the quenching liquid between 130-DEG C and 150-DEG C during quenching, and carrying out tempering treatment when the quenching temperature reaches 180-DEG C and 200-DEG C;

step six, tempering treatment, namely preserving heat in a tempering furnace at the temperature of 250 +/-10 ℃ for 2.5 hours and then naturally cooling;

step seven, heating the alloy casting to the highest temperature on the premise of not melting, preserving heat for a long time, and slowly cooling after various elements in the alloy are diffused and tend to be uniformly distributed;

and step eight, pressing the mixture by using a common steel die, wherein the pressed compact is a cuboid bending-resistant strip sample, and the pressing process adopts a secondary pressurization method, namely, after the primary pressurization, the pressure is maintained for 2min, then the pressure is unloaded, and then the pressure is again increased by 80 times of the primary pressure, and the pressure is maintained for 1 min. Then unloading the pressure to prepare for demoulding;

and step nine, guiding the mixture subjected to demoulding into a forming device for forming, then carrying out shot blasting on the casting for 20-25 minutes, and removing the oxide skin, sand grains and coating shells on the surface of the casting.

The alloy material has the following main characteristics:

wide technological characteristics

The primary process characteristics of steel bonded cemented carbides are machinability and heat treatability. The workability of the steel bonded cemented carbide depends on the content of the alloy matrix, and also on the properties and state of the matrix, and another important process characteristic of the steel bonded cemented carbide is its malleability. The forging not only can deform the alloy, but also can improve the structure of the material, and the weldability is another important technical characteristic of the steel bonded hard alloy. The steel-bonded cemented carbide can be welded not only to a steel material by various welding methods such as butt welding, insert welding, arc welding, vacuum diffusion welding, butt welding, etc., but also to alloys themselves.

Second, good physical and mechanical properties

The steel bonded hard alloy has the most important performance of high hardness in a hardened state, the wear resistance of the steel bonded hard alloy is equivalent to that of hard alloy with high cobalt content, and the steel bonded hard alloy has higher toughness compared with the hard alloy, and the steel bonded hard alloy has higher rigidity, elastic modulus, bending strength and compressive strength compared with steel, thereby showing good comprehensive performance of the steel bonded hard alloy. In addition, the steel bonded hard alloy also has a series of beneficial physical properties such as lower specific gravity, higher specific strength, good self-lubricating property, high damping characteristic and natural frequency, thermal expansion coefficient similar to that of steel and the like.

Thirdly, excellent chemical stability

The steel bonded hard alloy has excellent chemical stability, and can resist high temperature, oxidation and corrosion of various media such as atmosphere, gas, seawater, oil, acid, alkali, salt and the like. The corrosion resistance of the steel bonded hard alloy depends on the type of the matrix, so that the proper steel or alloy can be selected as the binding phase according to different requirements, and the steel or alloy has corresponding corrosion resistance.

The working principle and the using process of the invention are as follows:

weighing 1.2% of carbon, 0.65% of silicon, 1.3% of manganese, 1.6% of chromium, 0.2% of molybdenum, 0.1% of nickel, 1.2% of aluminum, 0.5% of copper, 0.03% of titanium, 0.06% of vanadium, 0.001% of cerium, 0.003% of boron, 0.05% of cobalt and 0.03% of aluminum, placing 0.65% of silicon, 1.3% of manganese and 1.2% of carbon in the composition obtained by calculation into a smelting furnace for melting, then sequentially adding 1.6% of chromium, 0.2% of molybdenum, 0.1% of nickel, 1.2% of aluminum, 0.5% of copper, 0.03% of titanium, 0.06% of vanadium, 0.001% of cerium, 0.003% of boron and 0.05% of cobalt, heating to 1350 hours, adding aluminum, casting into the furnace for annealing at the temperature of 870 hours, casting and then placing the alloy into the furnace for annealing at the temperature of 870 hours, casting and annealing at the temperature of 870 hours after annealing at the temperature of 890 ℃ of 890 hours, adopting air cooling, wherein the air cooling speed is not more than 1.2 ℃/min, quenching, placing in a quenching furnace with the temperature of 930-; the quenching is divided into two stages, the first stage is isothermal quenching, and the quenching speed is 15-20/min; when the temperature is reduced to 600-650 ℃, a second stage of quenching is adopted, the quenching speed is 3-5 ℃/s, the tempering treatment is carried out, the temperature is kept in a tempering furnace at the temperature of 250 +/-10 ℃ for 2.5 hours, then the natural cooling is carried out, the diffusion annealing method is used for homogenizing the chemical components of the alloy casting and improving the service performance of the alloy casting, the casting is heated to the highest temperature on the premise of no melting, the temperature is kept for a long time, the mixture is slowly cooled after various elements in the alloy are diffused and tend to be uniformly distributed, then the mixture is pressed, the common steel die is adopted for pressing, the pressed blank is a cuboid anti-bending strip sample, the pressing process adopts a secondary pressing method, namely, after the first pressing, the pressure is kept for 2min, then the pressure is unloaded, and then the pressure is kept for 1min again by using 80 degrees of the first pressure. And then unloading the pressure to prepare demoulding, introducing the mixture subjected to demoulding into a forming device for forming, and then carrying out shot blasting on the casting for 20-25 minutes to remove the oxide skin, sand grains and coating shells on the surface of the casting.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. A high-strength anti-oxidation alloy material and a preparation method thereof are characterized in that: the high-strength anti-oxidation alloy material mainly comprises 1.2% of carbon, 0.65% of silicon, 1.3% of manganese, 1.6% of chromium, 0.2% of molybdenum, 0.1% of nickel, 1.2% of aluminum, 0.5% of copper, 0.03% of titanium, 0.06% of vanadium, 0.001% of cerium, 0.003% of boron, 0.05% of cobalt and 0.03% of aluminum.

2. The high-strength anti-oxidation alloy material and the preparation method thereof according to claim 1, wherein the high-strength anti-oxidation alloy material is characterized in that: the preparation steps of the high-strength anti-oxidation alloy material are as follows:

step one, weighing 1.2% of carbon, 0.65% of silicon, 1.3% of manganese, 1.6% of chromium, 0.2% of molybdenum, 0.1% of nickel, 1.2% of aluminum, 0.5% of copper, 0.03% of titanium, 0.06% of vanadium, 0.001% of cerium, 0.003% of boron, 0.05% of cobalt and 0.03% of aluminum;

step two, firstly putting 0.65 percent of silicon, 1.3 percent of manganese and 1.2 percent of carbon in the composition obtained by calculation into a smelting furnace for smelting, then sequentially adding 1.6 percent of chromium, 0.2 percent of molybdenum, 0.1 percent of nickel, 1.2 percent of aluminum, 0.5 percent of copper, 0.03 percent of titanium, 0.06 percent of vanadium, 0.001 percent of cerium, 0.003 percent of boron and 0.05 percent of cobalt, heating to 1250-year 1350 ℃, then adding aluminum, and preserving heat for 1.5 hours;

step three, casting the obtained alloy liquid at 1100-1150 ℃, and annealing after cooling to 300-350 ℃;

step four, placing the cast product in an annealing furnace with the temperature of 870 ℃ and 890 ℃, preserving heat for 3.5 hours, discharging, and cooling by air at the air cooling speed of not more than 1.2 ℃/min;

step five, quenching treatment, namely placing the steel plate in a quenching furnace at 930-DEG C and 950 ℃, preserving heat for 2 hours, then carrying out quenching treatment of the quenching liquid at constant temperature by using an aqueous quenching liquid, keeping the temperature of the quenching liquid between 130-DEG C and 150-DEG C during quenching, and carrying out tempering treatment when the quenching temperature reaches 180-DEG C and 200-DEG C;

step six, tempering treatment, namely preserving heat in a tempering furnace at the temperature of 250 +/-10 ℃ for 2.5 hours and then naturally cooling;

step seven, heating the alloy casting to the highest temperature on the premise of not melting, preserving heat for a long time, and slowly cooling after various elements in the alloy are diffused and tend to be uniformly distributed;

and step eight, pressing the mixture by using a common steel die, wherein the pressed compact is a cuboid bending-resistant strip sample, and the pressing process adopts a secondary pressurization method, namely, after the primary pressurization, the pressure is maintained for 2min, then the pressure is unloaded, and then the pressure is again increased by 80 times of the primary pressure, and the pressure is maintained for 1 min. Then unloading the pressure to prepare for demoulding;

and step nine, guiding the mixture subjected to demoulding into a forming device for forming, then carrying out shot blasting on the casting for 20-25 minutes, and removing the oxide skin, sand grains and coating shells on the surface of the casting.

3. The high-strength anti-oxidation alloy material and the preparation method thereof according to claim 2, wherein the high-strength anti-oxidation alloy material is characterized in that: the alloy material has the following main characteristics:

wide technological characteristics

The primary process characteristics of steel bonded cemented carbides are machinability and heat treatability. The workability of the steel bonded cemented carbide depends on the content of the alloy matrix, and also on the properties and state of the matrix, and another important process characteristic of the steel bonded cemented carbide is its malleability. The forging not only can deform the alloy, but also can improve the structure of the material, and the weldability is another important technical characteristic of the steel bonded hard alloy. The steel-bonded cemented carbide can be welded not only to a steel material by various welding methods such as butt welding, insert welding, arc welding, vacuum diffusion welding, butt welding, etc., but also to alloys themselves.

Second, good physical and mechanical properties

The steel bonded hard alloy has the most important performance of high hardness in a hardened state, the wear resistance of the steel bonded hard alloy is equivalent to that of hard alloy with high cobalt content, and the steel bonded hard alloy has higher toughness compared with the hard alloy, and the steel bonded hard alloy has higher rigidity, elastic modulus, bending strength and compressive strength compared with steel, thereby showing good comprehensive performance of the steel bonded hard alloy. In addition, the steel bonded hard alloy also has a series of beneficial physical properties such as lower specific gravity, higher specific strength, good self-lubricating property, high damping characteristic and natural frequency, thermal expansion coefficient similar to that of steel and the like.

Thirdly, excellent chemical stability

The steel bonded hard alloy has excellent chemical stability, and can resist high temperature, oxidation and corrosion of various media such as atmosphere, gas, seawater, oil, acid, alkali, salt and the like. The corrosion resistance of the steel bonded hard alloy depends on the type of the matrix, so that the proper steel or alloy can be selected as the binding phase according to different requirements, and the steel or alloy has corresponding corrosion resistance.