CN114438410A - Wear-resistant impact-resistant metal material and forming method thereof - Google Patents
Wear-resistant impact-resistant metal material and forming method thereof Download PDFInfo
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- 239000007769 metal material Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 49
- 239000002184 metal Substances 0.000 claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 238000005496 tempering Methods 0.000 claims abstract description 29
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 15
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 14
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 238000010791 quenching Methods 0.000 claims description 29
- 230000000171 quenching effect Effects 0.000 claims description 29
- 238000003723 Smelting Methods 0.000 claims description 21
- 229910052796 boron Inorganic materials 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 11
- 229910052720 vanadium Inorganic materials 0.000 claims description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims description 10
- 229910052721 tungsten Inorganic materials 0.000 claims description 10
- 229910052758 niobium Inorganic materials 0.000 claims description 7
- 229910052718 tin Inorganic materials 0.000 claims description 7
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 230000035939 shock Effects 0.000 abstract description 5
- 239000000956 alloy Substances 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 10
- 230000002195 synergetic effect Effects 0.000 description 6
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- 238000005260 corrosion Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
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- 206010039203 Road traffic accident Diseases 0.000 description 1
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- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a wear-resistant impact-resistant metal material and a forming method thereof, and relates to the technical field of metal material production and manufacturing. The wear-resistant impact-resistant metal material and the forming method thereof comprise the following steps: 0.45-2.82%, N: 0.10 to 0.35%, Mn: 0.1-0.35%, Cr: 21-25%, P: 0.02-0.05%, S: 0.01 to 0.05%, Si: 0.5-0.7% of the raw materials. Through adopting the sectional heating melting mode, can be better prepare the metal die base, improve metal material's shock resistance down, choose for use suitable process temperature and operating time, can be so that the quality of the metal material who prepares is good, and production efficiency is high, convenient operation, can effectively reduce or eliminate the internal stress in the metal material through adopting the sectional tempering, improve the toughness of metal and improve its shock resistance, can avoid its metal material to appear the crack in the tempering process through accurate temperature control simultaneously, guarantee metal material's finished product quality.
Description
Technical Field
The invention relates to the technical field of metal material production and manufacturing, in particular to a wear-resistant impact-resistant metal material and a forming method thereof.
Background
The metal materials include pure metals, alloys, intermetallic compounds of metal materials, special metal materials and the like, the application range of the metal materials is very wide, and the metal materials used in the manufacturing industry of automobiles are very many. As a convenient vehicle, the automobile brings great convenience to people, and meanwhile, potential safety hazards such as traffic accidents of collision and the like are caused, people often put safety at important positions when selecting the automobile, and the requirement that the strength and the impact resistance of a metal material are continuously improved in the automobile manufacturing process is required. The alloy is a substance with metal characteristics formed by alloying two or more metals and metals or nonmetals through a certain method. Although an alloy includes two or more metal materials, the physical properties of the alloy may be similar to those of the constituent elements of the alloy, but the tensile strength and shear strength of the alloy are generally very different from those of the constituent elements, mainly due to the great difference in atomic arrangement between the alloy and the simple metal. The factors influencing the metal properties mainly come from two aspects, namely the composition of metal elements on one hand and the processing technology of metals on the other hand, which requires that proper element compositions are selected and the processing technology is continuously optimized in production and manufacture.
Chinese patent CN104250714A discloses a low-density impact-resistant metal material, which comprises the following components: C. si, Mn, S, P, Cr, Ni, Cu, Co, Fe, and the balance of Cu. The low-density impact-resistant metal material disclosed by the patent is added with a small amount of Ni, Cu, Co and Fe, so that the density of the metal material is further reduced, the quality of the metal material is ensured, the metal material is formed by one-step casting without quenching or nitriding, the wear resistance and the impact resistance are improved, but the impact-resistant material manufactured by the patent is poor in impact resistance, Chinese patent CN104862590A discloses an impact-resistant composite metal material and a preparation method thereof, and the impact-resistant composite metal material is composed of the following components: ti, Co, Ag, Al, Sn, Ca, In and the balance of Fe, and the preparation method comprises the following steps: (1) taking the raw materials according to the weight; (2) putting the metal raw materials into a vacuum high-temperature smelting furnace, and smelting into a composite metal ingot; (3) cooling and preserving heat of the composite metal ingot in the step (2); (4) and annealing the composite metal ingot after heat preservation, and cooling to room temperature to prepare the shock-resistant composite metal ingot. The patent improves the shock resistance of the material by improving the heating rate, the annealing rate, the smelting temperature and the heat preservation temperature and changing other metals of the alloy material, but the wear resistance prepared by the patent is not enough, so that a metal material with good shock resistance, strong wear resistance and simple preparation method and a forming method thereof are urgently needed.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a wear-resistant impact-resistant metal material and a forming method thereof, and solves the problems of poor impact resistance and poor wear resistance of a finished product of the metal material in the production and processing process.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a wear-resistant impact-resistant metal material comprises the following raw materials in percentage by weight: c: 0.45-2.82%, N: 0.10 to 0.35%, Mn: 0.1-0.35%, Cr: 21-25%, P: 0.02-0.05%, S: 0.01 to 0.05%, Si: 0.5 to 0.7%, Al: 0.15-0.25%, B: 0.10-0.26%, V: 0.32 to 0.48%, Mo: 0.18-0.25%, W: 0.25 to 0.9%, Nb: 0.02 to 0.12%, Co: 0.068% -0.125% of Co, Sn: 0.032-0.068%, Ti: 1.6 to 2.4 percent, and the balance of Fe.
Preferably, the weight ratio of Mn to Cr is 0.1-0.35%: 21-25%, wherein the weight ratio of Al, B, V and Mo is 0.15-0.25%: 0.10-0.26%: 0.32-0.48%: mo: 0.18-0.25%, and the weight ratio of Co to Sn is as follows: 1: 2.
preferably, the weight ratio of W and Nb satisfies the functional relation: n is a radical ofw＝6.4×Nnb+0.124, where NwIs the percentage of W element in the raw material, NnbIs the percentage of NB element in the raw material.
Preferably, the composite material comprises the following raw materials in percentage by weight: c: 0.52-2.82%, N: 0.13 to 0.35%, Mn: 0.23-0.35%, Cr: 18-25%, P: 0.02-0.05%, S: 0.01 to 0.05%, Si: 0.5 to 0.7%, Al: 0.15-0.25%, B: 0.15-0.26%, V: 0.33 to 0.48%, Mo: 0.15-0.25%, W: 0.31 to 0.95%, Nb: 0.03-0.13%, Co: 0.068% -0.125% of Co, Sn: 0.032-0.068%, Ti: 1.6 to 2.4 percent, and the balance of Fe.
Preferably, the forming method of the wear-resistant and impact-resistant metal material comprises the following steps:
s1, weighing the raw materials for preparing the metal according to the weight ratio, then putting the raw materials in the weight ratio into a vacuum high-temperature smelting furnace for smelting, melting the metal by adopting a sectional heating smelting mode, and pouring and molding the obtained metal solution to obtain a metal mold blank;
and S2, putting the metal die blank prepared in the step S1 into a tempering furnace for tempering, tempering the tempering furnace in a sectional heating mode, then quenching the tempered metal die blank, and grinding and polishing the quenched composite metal to obtain a finished metal material.
Preferably, in the step S1, the specific operation method of the segmented heating smelting is as follows: firstly heating to 650-700 ℃, preserving heat for 20-30 min, then heating to 900-1200 ℃, preserving heat for 120-40 min, continuing heating to 1200-1400 ℃, preserving heat for 25-30 min, finally heating to 1600-1650 ℃, preserving heat for 1-1.5 h, wherein the heating rate is 30-50 ℃/min.
Preferably, in the step S2, the tempering treatment specifically includes: firstly, raising the temperature in a tempering furnace to 442-; the temperature is raised to 556 and 620 ℃ for the second time, and the temperature is kept for 1.5 to 2.5 hours; the temperature is raised to 753-; the temperature is raised to 920 ℃ and 1000 ℃ for four times, and the temperature is kept for 1.0 to 2.5 hours; the temperature is raised for five times to 1035-1146 ℃, and the temperature is maintained for 0.5 to 1.0 hour.
Preferably, in the step S2, the quenching process of quenching includes: firstly, the tempered metal material is put into nitrite solution for quenching, the quenching temperature is in the range of 270-290 ℃, and the quenching time is 0.3-0.5 h.
(III) advantageous effects
The invention provides a wear-resistant impact-resistant metal material and a forming method thereof. The method has the following beneficial effects:
1. according to the invention, the weight ratio of Mn to Cr, the weight ratio of B, V to Mo and the functional relationship of the weight ratio of W to Nb are controlled, so that the weight ratio of the raw materials of the metal material is optimized, Mn and Cr are mutually synergistic under the ratio, the hardenability, the strength, the hardness and the impact resistance can be improved, the oxidation resistance and the corrosion resistance can be improved, W and NB are mutually synergistic under the ratio of the functional relationship, the crystal grains can be refined, the hardenability and the heat strength can be improved, the sufficient strength and the creep resistance can be maintained at high temperature, and the mechanical property can be improved; the brittleness of the alloy caused by quenching can be inhibited, so that the processing capacity is improved, and meanwhile, a small amount of C, Mn, Cr and Cu raw materials are added into the metal material layer, so that the mechanical property and plasticity of the metal material are greatly improved, and the strength and the wear resistance of the metal material are greatly improved.
2. According to the invention, by adopting a sectional heating smelting mode, a metal mold blank can be better prepared, the impact resistance of a metal material is improved, and proper process temperature and operation time are selected, so that the prepared metal material has good quality, high production efficiency and convenience in operation, the internal stress in the metal material can be effectively reduced or eliminated by adopting sectional tempering, the toughness of the metal is improved, the impact resistance of the metal is improved, and meanwhile, the metal material can be prevented from cracking in the tempering process through accurate temperature control, so that the finished product quality of the metal material is ensured.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a wear-resistant impact-resistant metal material which comprises the following raw materials in percentage by weight: c: 0.45-2.82%, N: 0.10 to 0.35%, Mn: 0.1-0.35%, Cr: 21-25%, P: 0.02-0.05%, S: 0.01 to 0.05%, Si: 0.5 to 0.7%, Al: 0.15-0.25%, B: 0.10-0.26%, V: 0.32 to 0.48%, Mo: 0.18-0.25%, W: 0.25 to 0.9%, Nb: 0.02-0.12%, Co: 0.068% -0.125% of Co, Sn: 0.032-0.068%, Ti: 1.6 to 2.4 percent, and the balance of Fe.
The weight ratio of Mn to Cr is 0.1-0.35%: 21-25%, and the weight ratio of Al, B, V and Mo is 0.15-0.25%: 0.10-0.26%: 0.32-0.48%: mo: 0.18-0.25%, the weight ratio of Co to Sn is: 1: 2.
the weight ratio of W to Nb satisfies the functional relation: n is a radical ofw＝6.4×Nnb+0.124, where NwIs the percentage of W element in the raw material, NnbThe weight ratio of Mn to Cr is controlled according to the percentage of NB element in the raw material,B. The weight ratio of V to Mo and the weight ratio of W to Nb are in a functional relationship, so that the weight ratio of the raw materials of the metal material is optimized, Mn and Cr are in mutual synergistic action under the ratio, the hardenability, the strength, the hardness and the impact resistance can be improved, the oxidation resistance and the corrosion resistance can be improved, W and NB are in mutual synergistic action under the ratio of the functional relationship, crystal grains can be refined, the hardenability and the heat strength can be improved, enough strength and creep resistance can be maintained at high temperature, and the mechanical property can be improved; the brittleness of the alloy caused by quenching can be inhibited, so that the processing capacity is improved, and meanwhile, a small amount of C, Mn, Cr and Cu raw materials are added into the metal material layer, so that the mechanical property and plasticity of the metal material are greatly improved, and the strength and the wear resistance of the metal material are greatly improved.
A forming method of a wear-resistant impact-resistant metal material comprises the following steps:
s1, weighing raw materials for preparing metal according to the weight ratio, then putting the raw materials according to the weight ratio into a vacuum high-temperature smelting furnace for smelting, melting the metal by adopting a sectional heating smelting mode, and pouring and molding the obtained metal solution to obtain a metal mold blank;
and S2, putting the metal die blank prepared in the step S1 into a tempering furnace for tempering, tempering the tempering furnace in a sectional heating mode, then quenching the tempered metal die blank, and grinding and polishing the quenched composite metal to obtain a finished metal material.
In the step S1, the specific operation method of the sectional heating smelting is as follows: firstly heating to 650-700 ℃, preserving heat for 20-30 min, then heating to 900-1200 ℃, preserving heat for 120-40 min, continuing heating to 1200-1400 ℃, preserving heat for 25-30 min, finally heating to 1600-1650 ℃, preserving heat for 1-1.5 h, wherein the heating rate is 30-50 ℃/min, adopting a sectional heating and smelting mode, better preparing a metal mold blank, improving the impact resistance of the metal material, selecting proper process temperature and operation time, and enabling the prepared metal material to have good quality, high production efficiency and convenient operation.
In step S2, the specific operation mode of the tempering treatment is as follows: firstly, raising the temperature in a tempering furnace to 442-; raising the temperature to 556-620 ℃ for the second time, and keeping the temperature for 1.5-2.5 hours; the temperature is raised to 753-; the temperature is raised to 920 ℃ and 1000 ℃ for four times, and the temperature is kept for 1.0 to 2.5 hours; the temperature is raised to 1035-.
In the step S2, the quenching process of quenching includes the specific steps of: firstly, the tempered metal material is put into nitrite solution for quenching, the quenching temperature is in the range of 270-290 ℃, the quenching time is 0.3-0.5 h, the strength, the toughness and the fatigue strength of the metal material can be greatly improved through quenching and tempering, and the comprehensive mechanical properties among the properties can be obtained to meet different use requirements.
Example two:
the embodiment of the invention provides a wear-resistant impact-resistant metal material which comprises the following raw materials in percentage by weight: c: 0.52-2.82%, N: 0.13 to 0.35%, Mn: 0.23-0.35%, Cr: 18-25%, P: 0.02-0.05%, S: 0.01 to 0.05%, Si: 0.5 to 0.7%, Al: 0.15-0.25%, B: 0.15-0.26%, V: 0.33 to 0.48%, Mo: 0.15-0.25%, W: 0.31 to 0.95%, Nb: 0.03-0.13%, Co: 0.068% -0.125% of Co, Sn: 0.032-0.068%, Ti: 1.6 to 2.4 percent, and the balance of Fe.
The weight ratio of Mn to Cr is 0.23-0.35%: 18-25%, and the weight ratio of Al, B, V and Mo is 0.15-0.25%: 0.15-0.26%: 0.33-0.48%: mo: 0.15-0.25%, the weight ratio of Co to Sn is: 1: 2.
the weight ratio of W to Nb satisfies the functional relation: n is a radical ofw＝6.4×Nnb+0.124, where NwIs the percentage of W element in the raw material, NnbThe weight ratio of Mn to Cr, B,The weight ratio of V to Mo and the weight ratio of W to Nb are in a functional relationship, so that the weight ratio of the raw materials of the metal material is optimized, Mn and Cr are in mutual synergistic action under the ratio, the hardenability, the strength, the hardness and the impact resistance can be improved, the oxidation resistance and the corrosion resistance can be improved, W and NB are in mutual synergistic action under the ratio of the functional relationship, crystal grains can be refined, the hardenability and the heat strength can be improved, enough strength and creep resistance can be maintained at high temperature, and the mechanical property can be improved; the brittleness of the alloy caused by quenching can be inhibited, so that the processing capacity is improved, and meanwhile, a small amount of C, Mn, Cr and Cu raw materials are added into the metal material layer, so that the mechanical property and plasticity of the metal material are greatly improved, and the strength and the wear resistance of the metal material are greatly improved.
A forming method of a wear-resistant impact-resistant metal material comprises the following steps:
s1, weighing raw materials for preparing metal according to the weight ratio, then putting the raw materials according to the weight ratio into a vacuum high-temperature smelting furnace for smelting, melting the metal by adopting a sectional heating smelting mode, and pouring and molding the obtained metal solution to obtain a metal mold blank;
and S2, putting the metal die blank prepared in the step S1 into a tempering furnace for tempering, tempering the tempering furnace in a sectional heating mode, then quenching the tempered metal die blank, and grinding and polishing the quenched composite metal to obtain a finished metal material.
In the step S1, the specific operation method of the sectional heating smelting is as follows: firstly heating to 650-700 ℃, preserving heat for 20-30 min, then heating to 900-1200 ℃, preserving heat for 120-40 min, continuously heating to 1200-1400 ℃, preserving heat for 25-30 min, finally heating to 1600-1650 ℃, preserving heat for 1-1.5 h, wherein the heating rate is 30-50 ℃/min, a sectional heating and smelting mode is adopted, a metal mold blank can be better prepared, the impact resistance of the metal material is improved, and the proper process temperature and operation time are selected, so that the prepared metal material has good quality, high production efficiency and convenient operation.
In step S2, the specific operation mode of the tempering treatment is as follows: firstly, raising the temperature in a tempering furnace to 442-; the temperature is raised to 556 and 620 ℃ for the second time, and the temperature is kept for 1.5 to 2.5 hours; the temperature is raised to 753-; the temperature is raised to 920 ℃ and 1000 ℃ for four times, and the temperature is kept for 1.0 to 2.5 hours; the temperature is raised to 1035-.
In the step S2, the quenching process of quenching includes the specific steps of: firstly, the tempered metal material is put into nitrite solution for quenching, the quenching temperature is in the range of 270-290 ℃, and the quenching time is 0.3-0.5 h.
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 (8)
1. A wear-resistant impact-resistant metal material is characterized in that: comprises the following raw materials in percentage by weight: c: 0.45-2.82%, N: 0.10 to 0.35%, Mn: 0.1-0.35%, Cr: 21-25%, P: 0.02-0.05%, S: 0.01 to 0.05%, Si: 0.5 to 0.7%, Al: 0.15-0.25%, B: 0.10-0.26%, V: 0.32 to 0.48%, Mo: 0.18-0.25%, W: 0.25 to 0.9%, Nb: 0.02 to 0.12%, Co: 0.068% -0.125% of Co, Sn: 0.032-0.068%, Ti: 1.6 to 2.4 percent, and the balance of Fe.
2. A wear-resistant impact-resistant metallic material according to claim 1, wherein: the weight ratio of Mn to Cr is 0.1-0.35%: 21-25%, wherein the weight ratio of Al, B, V and Mo is 0.15-0.25%: 0.10-0.26%: 0.32-0.48%: mo: 0.18-0.25%, and the weight ratio of Co to Sn is as follows: 1: 2.
3. a wear-resistant impact-resistant metallic material according to claim 1, wherein: the weight ratio of W to Nb satisfies the functional relation: n is a radical ofw＝6.4×Nnb+0.124, where NwIs the percentage of W element in the raw material, NnbIs the percentage of NB element in the raw material.
4. A wear-resistant impact-resistant metallic material according to claim 1, wherein: comprises the following raw materials in percentage by weight: c: 0.52-2.82%, N: 0.13 to 0.35%, Mn: 0.23-0.35%, Cr: 18-25%, P: 0.02-0.05%, S: 0.01 to 0.05%, Si: 0.5 to 0.7%, Al: 0.15-0.25%, B: 0.15-0.26%, V: 0.33 to 0.48%, Mo: 0.15-0.25%, W: 0.31 to 0.95%, Nb: 0.03-0.13%, Co: 0.068% -0.125% of Co, Sn: 0.032-0.068%, Ti: 1.6 to 2.4 percent, and the balance of Fe.
5. The method for forming a wear-resistant impact-resistant metal material according to any one of claims 1 to 4, wherein: the method comprises the following steps:
s1, weighing the raw materials for preparing the metal according to the weight ratio, then putting the raw materials in the weight ratio into a vacuum high-temperature smelting furnace for smelting, melting the metal by adopting a sectional heating smelting mode, and pouring and molding the obtained metal solution to obtain a metal mold blank;
and S2, putting the metal die blank prepared in the step S1 into a tempering furnace for tempering, tempering the tempering furnace in a sectional heating mode, then quenching the tempered metal die blank, and grinding and polishing the quenched composite metal to obtain a finished metal material.
6. The method for forming a wear-resistant impact-resistant metal material as claimed in claim 5, wherein: in the step S1, the specific operation method of the sectional heating melting is as follows: firstly heating to 650-700 ℃, preserving heat for 20-30 min, then heating to 900-1200 ℃, preserving heat for 120-40 min, continuing heating to 1200-1400 ℃, preserving heat for 25-30 min, finally heating to 1600-1650 ℃, preserving heat for 1-1.5 h, wherein the heating rate is 30-50 ℃/min.
7. The method for forming a wear-resistant impact-resistant metal material as claimed in claim 5, wherein: in the step S2, the specific operation mode of the tempering treatment is as follows: firstly, raising the temperature in a tempering furnace to 442-; the temperature is raised to 556 and 620 ℃ for the second time, and the temperature is kept for 1.5 to 2.5 hours; the temperature is raised to 753-; the temperature is raised to 920 ℃ and 1000 ℃ for four times, and the temperature is kept for 1.0 to 2.5 hours; the temperature is raised for five times to 1035-1146 ℃, and the temperature is maintained for 0.5 to 1.0 hour.
8. The method for forming a wear-resistant impact-resistant metal material as claimed in claim 5, wherein: in the step S2, the quenching process of quenching includes the specific steps of: firstly, the tempered metal material is put into nitrite solution for quenching, the quenching temperature is in the range of 270-290 ℃, and the quenching time is 0.3-0.5 h.
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