CN116377351A - High-strength wear-resistant steel casting and preparation method thereof - Google Patents
High-strength wear-resistant steel casting and preparation method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 84
- 239000010959 steel Substances 0.000 title claims abstract description 84
- 238000005266 casting Methods 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000004744 fabric Substances 0.000 claims abstract description 58
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 29
- 239000011159 matrix material Substances 0.000 claims abstract description 23
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 15
- 229910001208 Crucible steel Inorganic materials 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 105
- 239000000956 alloy Substances 0.000 claims description 105
- 238000011282 treatment Methods 0.000 claims description 58
- 238000003723 Smelting Methods 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 18
- 238000005496 tempering Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000010791 quenching Methods 0.000 claims description 16
- 230000000171 quenching effect Effects 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- 239000007864 aqueous solution Substances 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 239000003365 glass fiber Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229910052684 Cerium Inorganic materials 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 7
- 229910052746 lanthanum Inorganic materials 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 7
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 7
- 238000001291 vacuum drying Methods 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052735 hafnium Inorganic materials 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052741 iridium Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052762 osmium Inorganic materials 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims 2
- 230000008018 melting Effects 0.000 claims 2
- 239000011230 binding agent Substances 0.000 claims 1
- 238000004321 preservation Methods 0.000 description 12
- 238000005299 abrasion Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 238000009941 weaving Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 241001098109 Jacaranda mimosifolia Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 238000012797 qualification Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
-
- 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
-
- 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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with 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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/08—Making alloys containing metallic or non-metallic fibres or filaments by contacting the fibres or filaments with molten metal, e.g. by infiltrating the fibres or filaments placed in a mould
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/08—Iron group metals
Abstract
The invention discloses a high-strength wear-resistant steel casting and a preparation method thereof, and relates to the technical field of cast steel materials, wherein the steel casting comprises a matrix material and reinforcing fiber cloth, and the reinforcing fiber cloth accounts for 5-10% of the weight of the steel casting; the matrix material comprises the following components: C. si, mn, cr, cu, nb, hf, al, W, os, ir, B, rare earth elements, N and Fe. The high-strength wear-resistant steel casting has the advantages of good mechanical property, good wear resistance, excellent performance stability and durability and long service life.
Description
Technical Field
The invention relates to the technical field of steel casting materials, in particular to a high-strength wear-resistant steel casting and a preparation method thereof.
Background
The steel casting is widely applied to various metallurgical mechanical equipment or parts as a common structural material, and the quality of the steel casting directly influences the service life, the normal working stability and the safety of the equipment. In particular in special machines or engineering, the cast steel often acts as a critical wearing part on the equipment, whether it itself has good mechanical properties or not determines to a large extent the service life and the effect of the equipment. Therefore, from the material and the preparation process of the steel castings, it is particularly important to develop the steel castings with good comprehensive performance and performance stability.
The tooth is one of the important parts of the excavator and plays a very important role in separating materials and protecting the front wall of the shovel. As a more common steel casting, the working condition of the material is very bad, when the material is contacted, the rapid movement of the material enables the bucket tooth to be subjected to strong impact action, the tip of the bucket tooth is worn by the strong impact sliding of the material, various furrows, deformation and the like usually occur, the surface is easy to fall off due to the wear, so the service life of the bucket tooth is very short, and the consumption is huge. At the same time, the indirect economic loss caused by equipment damage shutdown and production stoppage is huge and cannot be counted. It can be seen that improvement of strength and wear resistance of steel castings is imperative.
In order to solve the problems, the Chinese patent publication CN106282787B discloses a cast steel material with high strength, good toughness and low cost, which comprises the following components in percentage by weight: 0.32-0.40% of C, 0.25-0.45% of Si, 0.50-0.80% of Mn, less than or equal to 0.035% of P, less than or equal to 0.035% of S, 0.02-0.03% of N, 0.020-0.060% of Al, less than or equal to 0.10% of Mo, less than or equal to 0.05% of V, less than or equal to 0.20% of Ni, less than or equal to 0.20% of Cu, less than or equal to 0.25% of Cr, and the balance of Fe and unavoidable impurities. The cast steel material improves the strength and toughness of the axle housing and the suspension support without increasing the wall thickness, the section proportion and the manufacturing cost of the axle housing and the suspension of the engineering vehicle so as to improve the bearing capacity; the thickness of the casting of the product can be properly reduced by combining finite element analysis, so that the purpose of light weight is achieved, and meanwhile, the manufacturing cost is reduced. However, the abrasion resistance of the product still remains to be further improved.
Therefore, there is still a need in the art for a high-strength wear-resistant steel casting with good mechanical properties, good wear resistance, excellent performance stability and durability, and long service life, and a preparation method thereof.
Disclosure of Invention
The invention mainly aims to provide a high-strength wear-resistant steel casting with good mechanical property, good wear resistance, excellent performance stability and durability and long service life and a preparation method thereof.
In order to achieve the above purpose, the invention provides a high-strength wear-resistant steel casting, which comprises a matrix material and reinforcing fiber cloth uniformly distributed in the matrix material, wherein the reinforcing fiber cloth accounts for 5-10% of the weight of the steel casting; the matrix material comprises the following components in percentage by mass: 0.13 to 0.23 percent of C, 0.35 to 0.8 percent of Si, 0.5 to 1.5 percent of Mn, 0.5 to 1.0 percent of Cr, 0.5 to 0.8 percent of Cu, 0.005 to 0.01 percent of Nb, 0.001 to 0.005 percent of Hf, 0.01 to 0.05 percent of Al, 0.001 to 0.003 percent of W, 0.002 to 0.004 percent of Os, 0.002 to 0.004 percent of Ir, 0.001 to 0.002 percent of B, 0.006 to 0.01 percent of rare earth element, 0.0003 to 0.0005 percent of N and the balance of Fe.
Preferably, the reinforcing fiber cloth is any one of Qinghai Guxiang GX-CF300 carbon fiber cloth and 06 alkali-free glass fiber cloth EWR600-100 provided by the glass fiber weaving mill of jacaranda in Huzhou.
Preferably, the rare earth element is a mixture formed by mixing Ce and La according to the mass ratio of (3-5) to 1.
The invention also aims at providing a preparation method of the high-strength wear-resistant steel casting, which comprises the following steps:
s1, adding the reinforced fiber cloth into an aqueous solution of an adhesive, soaking for 5-8 minutes at 50-60 ℃, taking out, and drying in a vacuum drying oven at 100-110 ℃ to constant weight; then evenly placing the mixture in a mould;
s2, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Cu intermediate alloy, fe-Nb intermediate alloy, fe-Hf intermediate alloy, fe-Al intermediate alloy, fe-W intermediate alloy, fe-Os intermediate alloy, fe-Ir intermediate alloy, fe-B intermediate alloy, fe-Ce intermediate alloy, fe-La intermediate alloy and Fe-N intermediate alloy into molten steel in a vacuum induction furnace according to mass percentage; pouring molten steel into a mold provided with the reinforced fiber cloth, cooling, solidifying and demolding;
and S3, performing heat treatment to obtain the high-strength wear-resistant steel casting.
Preferably, the aqueous solution of the adhesive in step S1 is formed by mixing the following components in parts by weight: 3-5 parts of sodium silicate, 1-3 parts of sodium tripolyphosphate and 20-30 parts of water.
Preferably, the smelting temperature of the smelting in step S2 is 1630-1680 ℃.
Preferably, the temperature of the mold with the reinforcing fiber cloth placed in the step S2 before molten steel is poured in is 800-1000 ℃.
Preferably, the heat treatment in step S3 includes a normalizing treatment, a quenching treatment, and a tempering treatment in this order.
Preferably, the temperature of the normalizing treatment is 900-950 ℃, and the normalizing treatment is cooled in the air after the heat preservation time is 1-3 hours; the quenching treatment process is to keep the temperature at 880-900 ℃ for 2-4 hours and then cool the water; the tempering treatment is carried out by keeping the temperature at 650-700 ℃ for 1-3 hours and cooling in air.
Due to the application of the technical scheme, the invention has the following beneficial effects:
(1) The preparation method of the high-strength wear-resistant steel casting disclosed by the invention has the advantages of simple process, convenience in operation, small equipment dependence, high preparation efficiency and high finished product qualification rate, is suitable for continuous large-scale production, and has higher popularization and application values.
(2) The invention discloses a high-strength wear-resistant steel casting, which comprises a matrix material and reinforcing fiber cloth uniformly distributed in the matrix material, wherein the reinforcing fiber cloth is any one of Qinghai Guxiang GX-CF300 carbon fiber cloth and 06 alkali-free glass fiber cloth EWR600-100 provided by Yangda glass fiber weaving factories in Huzhou; by means of the structural design, the base material fixes the reinforced fiber cloth inside, so that not only can the mechanical properties of the steel casting be improved, but also the steel can be endowed with excellent wear resistance.
(3) The invention discloses a high-strength wear-resistant steel casting, which comprises the following components in percentage by mass: 0.13 to 0.23 percent of C, 0.35 to 0.8 percent of Si, 0.5 to 1.5 percent of Mn, 0.5 to 1.0 percent of Cr, 0.5 to 0.8 percent of Cu, 0.005 to 0.01 percent of Nb, 0.001 to 0.005 percent of Hf, 0.01 to 0.05 percent of Al, 0.001 to 0.003 percent of W, 0.002 to 0.004 percent of Os, 0.002 to 0.004 percent of Ir, 0.001 to 0.002 percent of B, 0.006 to 0.01 percent of rare earth element, 0.0003 to 0.0005 percent of N and the balance of Fe. Through reasonable selection of component types and proportions, the components can be matched with each other to act together better, so that the steel casting has the advantages of good mechanical property, good wear resistance, excellent performance stability and durability and long service life.
(4) The invention discloses a high-strength wear-resistant steel casting, which sequentially comprises normalizing treatment, quenching treatment and tempering treatment; the temperature of the normalizing treatment is 900-950 ℃, and the normalizing treatment is cooled in the air after the heat preservation time is 1-3 hours; the quenching treatment process is to keep the temperature at 880-900 ℃ for 2-4 hours and then cool the water; the tempering treatment process is to cool in air after heat preservation for 1-3 hours at 650-700 ℃; through reasonable selection of the heat treatment process parameters, the physical properties of the steel casting can be further improved, so that the steel casting has high strength, wear resistance and long service life.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
Example 1
The high-strength wear-resistant steel casting comprises a matrix material and reinforcing fiber cloth uniformly distributed in the matrix material, wherein the reinforcing fiber cloth accounts for 5% of the weight of the steel casting; the matrix material comprises the following components in percentage by mass: 0.13% of C, 0.35% of Si, 0.5% of Mn, 0.5% of Cr, 0.5% of Cu, 0.005% of Nb, 0.001% of Hf, 0.01% of Al, 0.001% of W, 0.002% of Os, 0.002% of Ir, 0.001% of B, 0.006% of rare earth element, 0.0003% of N and the balance of Fe.
The reinforcing fiber cloth is Qinghai Guxiang GX-CF300 carbon fiber cloth; the rare earth element is a mixture formed by mixing Ce and La according to a mass ratio of 3:1.
A preparation method of a high-strength wear-resistant steel casting comprises the following steps:
s1, adding the reinforced fiber cloth into an aqueous solution of an adhesive, soaking for 5 minutes at 50 ℃, taking out, and drying in a vacuum drying oven at 100 ℃ until the weight is constant; then evenly placing the mixture in a mould;
s2, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Cu intermediate alloy, fe-Nb intermediate alloy, fe-Hf intermediate alloy, fe-Al intermediate alloy, fe-W intermediate alloy, fe-Os intermediate alloy, fe-Ir intermediate alloy, fe-B intermediate alloy, fe-Ce intermediate alloy, fe-La intermediate alloy and Fe-N intermediate alloy into molten steel in a vacuum induction furnace according to mass percentage; pouring molten steel into a mold provided with the reinforced fiber cloth, cooling, solidifying and demolding;
and S3, performing heat treatment to obtain the high-strength wear-resistant steel casting.
The aqueous solution of the adhesive in the step S1 is prepared by mixing the following components in parts by weight: 3 parts of sodium silicate, 1 part of sodium tripolyphosphate and 20 parts of water.
The smelting temperature of smelting in the step S2 is 1630 ℃; the temperature of the mould provided with the reinforced fiber cloth in the step S2 before molten steel is poured in is 800-1000 ℃.
The heat treatment in the step S3 sequentially comprises normalizing treatment, quenching treatment and tempering treatment; the temperature of the normalizing treatment is 900 ℃, and the normalizing treatment is cooled in the air after the heat preservation time is 1 hour; the quenching treatment process is to keep the temperature at 880 ℃ for 2 hours and then cool the water; the tempering treatment is carried out by keeping the temperature at 650 ℃ for 1 hour and then cooling in air.
Example 2
The high-strength wear-resistant steel casting comprises a matrix material and reinforcing fiber cloth uniformly distributed in the matrix material, wherein the reinforcing fiber cloth accounts for 6% of the weight of the steel casting; the matrix material comprises the following components in percentage by mass: 0.16% of C, 0.5% of Si, 0.7% of Mn, 0.6% of Cr, 0.6% of Cu, 0.006% of Nb, 0.002% of Hf, 0.02% of Al, 0.0015% of W, 0.0025% of Os, 0.0025% of Ir, 0.0013% of B, 0.007% of rare earth element, 0.00035% of N and the balance of Fe.
The reinforced fiber cloth is 06 alkali-free glass fiber cloth provided by the glass fiber weaving mill of jacobian in Huzhou; the rare earth element is a mixture formed by mixing Ce and La according to the mass ratio of 3.5:1.
A preparation method of a high-strength wear-resistant steel casting comprises the following steps:
s1, adding the reinforced fiber cloth into an aqueous solution of an adhesive, soaking for 6 minutes at 53 ℃, taking out, and drying in a vacuum drying oven at 103 ℃ to constant weight; then evenly placing the mixture in a mould;
s2, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Cu intermediate alloy, fe-Nb intermediate alloy, fe-Hf intermediate alloy, fe-Al intermediate alloy, fe-W intermediate alloy, fe-Os intermediate alloy, fe-Ir intermediate alloy, fe-B intermediate alloy, fe-Ce intermediate alloy, fe-La intermediate alloy and Fe-N intermediate alloy into molten steel in a vacuum induction furnace according to mass percentage; pouring molten steel into a mold provided with the reinforced fiber cloth, cooling, solidifying and demolding;
and S3, performing heat treatment to obtain the high-strength wear-resistant steel casting.
The aqueous solution of the adhesive in the step S1 is prepared by mixing the following components in parts by weight: 3.5 parts of sodium silicate, 1.5 parts of sodium tripolyphosphate and 23 parts of water; the smelting temperature of the smelting in the step S2 is 1650 ℃; the temperature of the mould provided with the reinforcing fiber cloth in the step S2 before molten steel is poured in is 850 ℃.
The heat treatment in the step S3 sequentially comprises normalizing treatment, quenching treatment and tempering treatment; the temperature of the normalizing treatment is 920 ℃, and the normalizing treatment is cooled in the air after the heat preservation time is 1.5 hours; the quenching treatment process is water cooling after heat preservation for 2.5 hours at 885 ℃; the tempering treatment is carried out by keeping the temperature at 660 ℃ for 1.5 hours and then cooling the temperature in the air.
Example 3
The high-strength wear-resistant steel casting comprises a matrix material and reinforcing fiber cloth uniformly distributed in the matrix material, wherein the reinforcing fiber cloth accounts for 8% of the weight of the steel casting; the matrix material comprises the following components in percentage by mass: 0.2% of C, 0.6% of Si, 1% of Mn, 0.8% of Cr, 0.65% of Cu, 0.008% of Nb, 0.003% of Hf, 0.035% of Al, 0.002% of W, 0.003% of Os, 0.003% of Ir, 0.0015% of B, 0.008% of rare earth element, 0.0004% of N and the balance of Fe.
The reinforcing fiber cloth is Qinghai Guxiang GX-CF300 carbon fiber cloth; the rare earth element is a mixture formed by mixing Ce and La according to a mass ratio of 4:1.
A preparation method of a high-strength wear-resistant steel casting comprises the following steps:
s1, adding the reinforced fiber cloth into an aqueous solution of an adhesive, soaking for 6.5 minutes at 55 ℃, taking out, and drying in a vacuum drying oven at 105 ℃ until the weight is constant; then evenly placing the mixture in a mould;
s2, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Cu intermediate alloy, fe-Nb intermediate alloy, fe-Hf intermediate alloy, fe-Al intermediate alloy, fe-W intermediate alloy, fe-Os intermediate alloy, fe-Ir intermediate alloy, fe-B intermediate alloy, fe-Ce intermediate alloy, fe-La intermediate alloy and Fe-N intermediate alloy into molten steel in a vacuum induction furnace according to mass percentage; pouring molten steel into a mold provided with the reinforced fiber cloth, cooling, solidifying and demolding;
and S3, performing heat treatment to obtain the high-strength wear-resistant steel casting.
The aqueous solution of the adhesive in the step S1 is prepared by mixing the following components in parts by weight: 4 parts of sodium silicate, 2 parts of sodium tripolyphosphate and 25 parts of water; the smelting temperature of smelting in the step S2 is 1660 ℃; the temperature of the die with the reinforcing fiber cloth placed in the step S2 before molten steel is poured in is 900 ℃.
The heat treatment in the step S3 sequentially comprises normalizing treatment, quenching treatment and tempering treatment; the temperature of the normalizing treatment is 930 ℃, and the normalizing treatment is cooled in the air after the heat preservation time is 2 hours; the quenching treatment process is water cooling after heat preservation for 3 hours at 890 ℃; the tempering treatment is carried out by keeping the temperature at 680 ℃ for 2 hours and cooling in air.
Example 4
The high-strength wear-resistant steel casting comprises a matrix material and reinforcing fiber cloth uniformly distributed in the matrix material, wherein the reinforcing fiber cloth accounts for 9% of the weight of the steel casting; the matrix material comprises the following components in percentage by mass: 0.21% of C, 0.7% of Si, 1.3% of Mn, 0.9% of Cr, 0.75% of Cu, 0.009% of Nb, 0.004% of Hf, 0.04% of Al, 0.0025% of W, 0.0035% of Os, 0.0035% of Ir, 0.0018% of B, 0.009% of rare earth elements, 0.00045% of N and the balance of Fe.
The reinforcing fiber cloth is 06 alkali-free glass fiber cloth EWR600-100 provided by the glass fiber weaving mill of jacobian in Huzhou; the rare earth element is a mixture formed by mixing Ce and La according to the mass ratio of 4.5:1.
A preparation method of a high-strength wear-resistant steel casting comprises the following steps:
s1, adding the reinforced fiber cloth into an aqueous solution of an adhesive, soaking for 7.5 minutes at 58 ℃, taking out, and drying in a vacuum drying oven at 108 ℃ to constant weight; then evenly placing the mixture in a mould;
s2, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Cu intermediate alloy, fe-Nb intermediate alloy, fe-Hf intermediate alloy, fe-Al intermediate alloy, fe-W intermediate alloy, fe-Os intermediate alloy, fe-Ir intermediate alloy, fe-B intermediate alloy, fe-Ce intermediate alloy, fe-La intermediate alloy and Fe-N intermediate alloy into molten steel in a vacuum induction furnace according to mass percentage; pouring molten steel into a mold provided with the reinforced fiber cloth, cooling, solidifying and demolding;
and S3, performing heat treatment to obtain the high-strength wear-resistant steel casting.
The aqueous solution of the adhesive in the step S1 is prepared by mixing the following components in parts by weight: 4.5 parts of sodium silicate, 2.5 parts of sodium tripolyphosphate and 28 parts of water; the smelting temperature of smelting in the step S2 is 1670 ℃; the temperature of the die with the reinforcing fiber cloth placed in the step S2 before molten steel is poured is 950 ℃.
The heat treatment in the step S3 sequentially comprises normalizing treatment, quenching treatment and tempering treatment; the temperature of the normalizing treatment is 940 ℃, and the normalizing treatment is cooled in the air after the heat preservation time is 2.5 hours; the quenching treatment process is water cooling after heat preservation for 3.5 hours at 895 ℃; the tempering treatment is carried out by keeping the temperature at 690 ℃ for 2.5 hours and then cooling the mixture in air.
Example 5
The high-strength wear-resistant steel casting comprises a matrix material and reinforcing fiber cloth uniformly distributed in the matrix material, wherein the reinforcing fiber cloth accounts for 10% of the weight of the steel casting; the matrix material comprises the following components in percentage by mass: 0.23% of C, 0.8% of Si, 1.5% of Mn, 1.0% of Cr, 0.8% of Cu, 0.01% of Nb, 0.005% of Hf, 0.05% of Al, 0.003% of W, 0.004% of Os, 0.004% of Ir, 0.002% of B, 0.01% of rare earth element, 0.0005% of N and the balance of Fe.
The reinforcing fiber cloth is Qinghai Guxiang GX-CF300 carbon fiber cloth; the rare earth element is a mixture formed by mixing Ce and La according to a mass ratio of 5:1.
A preparation method of a high-strength wear-resistant steel casting comprises the following steps:
s1, adding the reinforced fiber cloth into an aqueous solution of an adhesive, soaking for 8 minutes at 60 ℃, taking out, and drying in a vacuum drying oven at 110 ℃ to constant weight; then evenly placing the mixture in a mould;
s2, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Cu intermediate alloy, fe-Nb intermediate alloy, fe-Hf intermediate alloy, fe-Al intermediate alloy, fe-W intermediate alloy, fe-Os intermediate alloy, fe-Ir intermediate alloy, fe-B intermediate alloy, fe-Ce intermediate alloy, fe-La intermediate alloy and Fe-N intermediate alloy into molten steel in a vacuum induction furnace according to mass percentage; pouring molten steel into a mold provided with the reinforced fiber cloth, cooling, solidifying and demolding;
and S3, performing heat treatment to obtain the high-strength wear-resistant steel casting.
The aqueous solution of the adhesive in the step S1 is prepared by mixing the following components in parts by weight: 5 parts of sodium silicate, 3 parts of sodium tripolyphosphate and 30 parts of water; the smelting temperature of the smelting in the step S2 is 1680 ℃; the temperature of the mould provided with the reinforcing fiber cloth in the step S2 before molten steel is poured in is 1000 ℃.
The heat treatment in the step S3 sequentially comprises normalizing treatment, quenching treatment and tempering treatment; the temperature of the normalizing treatment is 950 ℃, and the normalizing treatment is cooled in the air after the heat preservation time is 3 hours; the quenching treatment process is water cooling after heat preservation for 4 hours at 900 ℃; the tempering treatment is carried out by keeping the temperature at 700 ℃ for 3 hours and then cooling the mixture in air.
Comparative example 1
A high strength wear resistant cast steel part substantially the same as in example 1 except that Cu, nb, and N were not added and normalizing treatment was not performed.
Comparative example 2
A high-strength abrasion-resistant cast steel member was substantially the same as in example 1 except that Hf, ir and W were not added and that tempering treatment was not performed.
In order to further illustrate the beneficial technical effects of the high-strength wear-resistant steel castings manufactured by the embodiments of the present invention, the high-strength wear-resistant steel castings manufactured by the embodiments 1 to 5 and the comparative examples 1 to 2 were subjected to the related performance tests, the test results are shown in table 1, and the test methods are as follows:
(1) Tensile strength: tensile test pieces taken so that the width direction of the steel casting was parallel to the longitudinal direction of the test pieces were used, and evaluation was performed based on JIS Z2241:2011. The sheet thickness was controlled to 15mm, and the tensile test piece was 13B of JISZ 2241:2011.
(2) Abrasion resistance: the abrasion loss in the scratch abrasion test (circumferential speed 3.7m/sec,50 hours) using a mixture of silica sand (JISG 5901: 5 th of 2016) and water (mixing ratio: silica sand 2: water 1) as an abrasion material was evaluated based on the ordinary steel (JISG 3101: 2015) and expressed as the abrasion loss ratio relative to the ordinary steel, which was obtained by dividing the abrasion loss of each steel by the abrasion loss of the ordinary steel. The test piece was controlled to have a thickness of 15 mm.
As can be seen from Table 1, the high-strength wear-resistant steel castings disclosed by the embodiment of the invention have more excellent mechanical properties and wear resistance compared with the products of the comparative examples; cu, nb, N, normalizing, hf, ir, W and tempering treatments are beneficial for improving the above properties.
TABLE 1
| Project | Tensile strength of | Wear ratio |
| Unit (B) | MPa | — |
| Example 1 | 1500 | ＜0.01 |
| Example 2 | 1508 | ＜0.01 |
| Example 3 | 1520 | ＜0.01 |
| Example 4 | 1526 | ＜0.01 |
| Example 5 | 1535 | ＜0.01 |
| Comparative example 1 | 1328 | 0.07 |
| Comparative example 2 | 1365 | 0.10 |
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The high-strength wear-resistant steel casting is characterized by comprising a base material and reinforcing fiber cloth uniformly distributed in the base material, wherein the reinforcing fiber cloth accounts for 5-10% of the weight of the steel casting; the matrix material comprises the following components in percentage by mass: 0.13 to 0.23 percent of C, 0.35 to 0.8 percent of Si, 0.5 to 1.5 percent of Mn, 0.5 to 1.0 percent of Cr, 0.5 to 0.8 percent of Cu, 0.005 to 0.01 percent of Nb, 0.001 to 0.005 percent of Hf, 0.01 to 0.05 percent of Al, 0.001 to 0.003 percent of W, 0.002 to 0.004 percent of Os, 0.002 to 0.004 percent of Ir, 0.001 to 0.002 percent of B, 0.006 to 0.01 percent of rare earth element, 0.0003 to 0.0005 percent of N and the balance of Fe.
2. The high-strength wear-resistant steel casting according to claim 1, wherein the reinforcing fiber cloth is any one of Qinghai Guxiang GX-CF300 carbon fiber cloth and 06 alkali-free glass fiber cloth EWR 600-100.
3. The high-strength wear-resistant steel casting according to claim 1, wherein the rare earth element is a mixture formed by mixing Ce and La according to the mass ratio of (3-5) to 1.
4. A method of producing a high strength wear resistant cast steel product according to any one of claims 1 to 3, comprising the steps of:
s1, adding the reinforced fiber cloth into an aqueous solution of an adhesive, soaking for 5-8 minutes at 50-60 ℃, taking out, and drying in a vacuum drying oven at 100-110 ℃ to constant weight; then evenly placing the mixture in a mould;
s2, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Cu intermediate alloy, fe-Nb intermediate alloy, fe-Hf intermediate alloy, fe-Al intermediate alloy, fe-W intermediate alloy, fe-Os intermediate alloy, fe-Ir intermediate alloy, fe-B intermediate alloy, fe-Ce intermediate alloy, fe-La intermediate alloy and Fe-N intermediate alloy into molten steel in a vacuum induction furnace according to mass percentage; pouring molten steel into a mold provided with the reinforced fiber cloth, cooling, solidifying and demolding;
and S3, performing heat treatment to obtain the high-strength wear-resistant steel casting.
5. The method for producing high-strength wear-resistant cast steel according to claim 4, wherein the aqueous solution of the binder in step S1 is prepared by mixing the following components in parts by weight: 3-5 parts of sodium silicate, 1-3 parts of sodium tripolyphosphate and 20-30 parts of water.
6. The method for producing high strength and wear resistant cast steel as claimed in claim 4, wherein the melting temperature of said melting in step S2 is 1630-1680 ℃.
7. The method for producing high strength and wear resistant steel castings according to claim 4, wherein the temperature of said reinforced fiber cloth placed mold in step S2 before molten steel is poured is 800 to 1000 ℃.
8. The method for producing a high-strength wear-resistant cast steel product according to claim 4, wherein the heat treatment in step S3 comprises normalizing treatment, quenching treatment and tempering treatment in this order.
9. The method for producing high-strength wear-resistant cast steel according to claim 8, wherein the normalizing treatment is carried out at 900-950 ℃ for 1-3 hours and then cooled in air; the quenching treatment process is to keep the temperature at 880-900 ℃ for 2-4 hours and then cool the water; the tempering treatment is carried out by keeping the temperature at 650-700 ℃ for 1-3 hours and cooling in air.
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