CN109454202B - Casting infiltration agent, wear-resistant steel casting and preparation method thereof - Google Patents
Casting infiltration agent, wear-resistant steel casting and preparation method thereof Download PDFInfo
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- CN109454202B CN109454202B CN201811518352.0A CN201811518352A CN109454202B CN 109454202 B CN109454202 B CN 109454202B CN 201811518352 A CN201811518352 A CN 201811518352A CN 109454202 B CN109454202 B CN 109454202B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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Abstract
The invention relates to a casting infiltration agent, a wear-resistant steel casting and a preparation method thereof, and belongs to the technical field of wear-resistant materials. The casting infiltration agent comprises the following components in percentage by mass: 50-70% of chromium, 3-5% of carbon, 1-2% of molybdenum, 1-1.5% of manganese, 1-2% of vanadium and the balance of iron. The carbon in the casting infiltration agent can form carbides with a large amount of chromium and a small amount of vanadium respectively, so that the hardness and the wear resistance of a casting infiltration layer are improved, and meanwhile, the manganese, the molybdenum and the vanadium can refine grains of the casting infiltration layer, so that the toughness of the casting infiltration layer is improved, and the impact resistance of the casting infiltration layer is improved.
Description
Technical Field
The invention relates to a casting infiltration agent, a wear-resistant steel casting and a preparation method thereof, and belongs to the technical field of wear-resistant materials.
Background
The casting infiltration technology is that alloy powder and hard particles are coated or made into a prefabricated part which is embedded on the specific surface of a casting mould, and a surface alloy layer with specific structure and performance is formed on the surface of a substrate by utilizing solidification residual heat during casting. The casting infiltration technology forms a composite casting infiltration layer on the local part of the easily worn casting, and can ensure that the casting has enough strength and toughness and greatly improve the wear resistance of the easily worn surface of the casting on the basis of not changing the original components and tissues of the casting, thereby prolonging the service life of the whole casting. And the casting infiltration technology has short production period, low energy consumption, simple process, no need of special equipment, thick composite layer and low cost, and is widely applied to industries such as metallurgy, mines, machinery and the like.
At present, chromium and other hard elements are mostly used as a reinforcing phase in the cast-infiltration technology, but the components are single, so that the matching relationship between the hardness and the toughness of a cast-infiltration layer is poor, and the cast-infiltration layer is easy to fall off and crack.
In the prior art, chinese patent application with application publication No. CN101195156A discloses a method for forming a cast-infiltration layer on the surface of a guide plate. The guide plate is formed by compounding a wear-resistant alloy layer and a matrix. The method comprises the following steps: grinding high-carbon ferrochrome, ferrovanadium, ferrotitanium and rare earth ferrosilicon into 200-300 meshes, uniformly stirring, adding 250-300 meshes of nickel-coated alumina powder, then adding resin, stirring, coating on the surface of a casting mold, solidifying for more than 30min, pouring medium-carbon low-alloy steel molten steel with the temperature of 1600-1650 ℃ into the casting mold, and cooling. The combination effect between the base body and the cast-infiltration layer of the guide plate prepared by the method is good, and the guide plate has high hardness and excellent wear resistance. However, the used ferrovanadium powder and nickel-coated alumina are more and expensive, and in addition, although the nickel-coated alumina can improve the wettability of alumina particles and a matrix, under the condition of a wear working condition, the alumina is still easy to peel off, and the wear resistance is poor.
Disclosure of Invention
The invention aims to provide a casting infiltration agent with low cost and good wear resistance.
The invention also provides a wear-resistant steel casting with low cost and good wear resistance.
The invention also provides a preparation method of the wear-resistant steel casting, which can further improve the wear resistance of the wear-resistant steel casting.
In order to realize the purposes, the casting infiltration agent adopts the technical scheme that:
a casting infiltration agent, which is characterized in that: the composite material comprises the following components in percentage by mass: 50-70% of chromium, 3-5% of carbon, 1-2% of molybdenum, 1-1.5% of manganese, 1-2% of vanadium and the balance of iron.
The carbon in the casting infiltration agent can form carbides with a large amount of chromium and a small amount of vanadium respectively, so that the hardness and the wear resistance of a casting infiltration layer are improved, and meanwhile, the manganese, the molybdenum and the vanadium can refine grains of the casting infiltration layer, so that the toughness of the casting infiltration layer is improved, and the impact resistance of the casting infiltration layer is improved.
The casting infiltration agent is prepared by mixing high-carbon ferrochrome powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder. The high-carbon ferrochromium powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder are mixed to prepare the casting infiltration agent, so that the uniformity of each component in the casting infiltration agent can be improved.
In order to reduce the melting difficulty of the casting infiltration agent, the average grain size of the casting infiltration agent is 80-200 mu m.
The technical scheme adopted by the wear-resistant steel casting is as follows:
the wear-resistant steel casting comprises a steel casting base body and a cast-infiltration layer arranged on the surface of the steel casting base body, wherein the cast-infiltration layer comprises the following components in percentage by mass: 50-70% of chromium, 3-5% of carbon, 1-2% of molybdenum, 1-1.5% of manganese, 1-2% of vanadium and the balance of iron.
The cast-infiltration layer in the wear-resistant steel casting is a multi-element alloy wear-resistant composite layer taking chromium as a main element, the cast-infiltration layer and a steel casting base body can form good metallurgical bonding, and carbon in the cast-infiltration layer can form carbides with a large amount of chromium and a small amount of vanadium respectively, so that the hardness and the wear resistance of the cast-infiltration layer are improved, and meanwhile, manganese, molybdenum and vanadium can refine grains of the cast-infiltration layer, improve the toughness of the cast-infiltration layer and improve the impact resistance of the cast-infiltration layer.
Preferably, the steel casting substrate is low alloy steel. The low alloy steel is used as a steel casting base body, the low alloy steel has better matching performance with the cast-infiltration layer, the bonding strength of the cast-infiltration layer and the steel casting base body can be further improved, the matching relation between the hardness and the toughness of the low alloy steel is good, and the integral impact wear resistance of the casting can be improved.
Preferably, the steel casting base body consists of the following components in percentage by mass: 0.35-0.40% of C, 0.30-0.50% of Si, 1.8-2.4% of Mn, 0.9-1.4% of Cr, 0.3-0.5% of Ni, 0.2-0.3% of Mo, 0.01-0.02% of Nb, 0.03-0.05% of B, less than or equal to 0.005% of S, less than or equal to 0.005% of P, and the balance of Fe. The content of P and S in the steel casting base body is controlled, the diffusion of P and S to the cast-infiltration layer is reduced, the cast-infiltration layer and the base body are prevented from becoming brittle, and the integral impact wear resistance is improved.
In order to further improve the abrasion and impact resistance of the cast-infiltration layer and reduce the cost, the thickness of the cast-infiltration layer is preferably 6-10 mm.
The preparation method of the wear-resistant steel casting adopts the technical scheme that:
the preparation method of the wear-resistant steel casting comprises the following steps:
providing a casting infiltration agent consistent with the composition of the casting infiltration layer;
providing a casting infiltration coating mainly consisting of the casting infiltration agent, an organic binder and an organic solvent;
and coating the casting infiltration coating on the surface of the mold cavity of the mold, then igniting the casting infiltration coating coated on the mold cavity of the mold, injecting molten steel into the mold cavity of the mold after the coating is solidified, and cooling.
The preparation method of the wear-resistant steel casting has simple process, can be completed by the conventional casting production line at present, has short production period and low cost, and can prepare a thicker cast-impregnated layer; in addition, the components between the prepared cast-infiltration layer and the steel casting base body are distributed in a gradient manner, so that the bonding strength of the cast-infiltration layer and the base body is greatly improved.
In order to improve the uniformity of each component in the casting infiltration agent and improve the mixing efficiency, preferably, the casting infiltration agent consists of high-carbon ferrochrome powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder; the average grain size of the casting infiltration agent is 80-200 mu m. The reason why the particle size range is selected is to ensure both melting of the infiltrant and flow of the molten steel into the infiltrant.
In order to further improve the performance of the infiltration layer and reduce the cost, the coating thickness of the infiltration coating on the surface of the cavity of the casting mould is preferably 5-9 mm.
Detailed Description
The casting infiltration agent provided by the invention is characterized in that: the composite material comprises the following components in percentage by mass: 50-70% of chromium, 3-5% of carbon, 1-2% of molybdenum, 1-1.5% of manganese, 1-2% of vanadium and the balance of iron.
The casting infiltration agent is prepared by mixing high-carbon ferrochrome powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder. The average grain size of the casting infiltration agent is 80-200 mu m, and preferably 120-150 mu m.
The invention provides a wear-resistant steel casting which comprises a steel casting base body and a cast-impregnated layer arranged on the surface of the steel casting base body, wherein the cast-impregnated layer comprises the following components in percentage by mass: 50-70% of chromium, 3-5% of carbon, 1-2% of molybdenum, 1-1.5% of manganese, 1-2% of vanadium and the balance of iron. The cast-infiltration layer comprises lath martensite structure with high wear resistance and chromium carbide and vanadium carbide which are dispersed and distributed.
The preparation method of the wear-resistant steel casting provided by the invention comprises the following steps:
providing a casting infiltration agent consistent with the composition of the casting infiltration layer;
providing a casting infiltration coating mainly consisting of the casting infiltration agent, an organic binder and an organic solvent;
and coating the casting infiltration coating on the surface of the mold cavity of the mold, then igniting the casting infiltration coating coated on the mold cavity of the mold, injecting molten steel into the mold cavity of the mold after the coating is solidified, and cooling.
The cast-infiltration layer of the wear-resistant steel prepared by the preparation method of the wear-resistant steel casting forms lath martensite with high wear resistance, and chromium carbide and vanadium carbide which are dispersed and distributed.
Preferably, the average grain size of the casting infiltration agent is 80-200 μm. More preferably, the average grain size of the casting agent is 120-150 μm.
When the infiltration casting coating is coated on the surface of the mold cavity, only a partial area of the surface of the mold cavity can be coated with the infiltration casting coating according to needs.
In order to improve the bonding strength of the infiltration casting coating on the surface of the mold cavity, reduce the flow of the infiltration casting coating on the surface of the mold cavity and improve the surface quality of the wear-resistant steel casting, preferably, the organic binder is polyvinyl butyral or phenolic resin. The organic solvent is ethanol. The mass ratio of the organic binder to the organic solvent is 1 (14-20). The ratio of the total mass of the organic binder and the organic solvent to the mass of the casting infiltration agent is 1 (7-11.5).
More preferably, the mass ratio of the organic binder to the organic solvent is 1 (15-20). The ratio of the total mass of the organic binder and the organic solvent to the mass of the casting infiltration agent is 1 (7-10).
Preferably, the molten steel is low alloy steel molten steel. Further preferably, the low alloy steel liquid comprises the following components in percentage by mass: 0.35-0.40% of C, 0.30-0.50% of Si, 1.8-2.4% of Mn, 0.9-1.4% of Cr, 0.3-0.5% of Ni, 0.2-0.3% of Mo, 0.01-0.02% of Nb, 0.03-0.05% of B, less than or equal to 0.005% of S, less than or equal to 0.005% of P, and the balance of Fe. The Cr and the Ni cooperate with each other to increase the super-cooling degree of the austenitic steel, refine the structure, improve the strength, improve the impact toughness and reduce the cold-brittleness transition temperature. Proper amount of Mo, Cr and Ni can refine crystal grains and improve strength.
Preferably, the temperature of the molten steel is 1580-1680 ℃. The casting at higher temperature can provide enough heat to melt the casting infiltration agent and ensure the diffusion of alloy elements of the cast infiltration layer into the matrix, and finally the metallurgical bonding between the cast infiltration layer and the matrix is ensured, so that the cast infiltration layer is not easy to peel off in the working engineering.
The technical solution of the present invention will be further described with reference to the following specific examples.
Examples of casting infiltrants
Example 1
The casting infiltration agent of the embodiment comprises the following components in percentage by mass: 70% of chromium, 5% of carbon, 2% of molybdenum, 1.5% of manganese, 2% of vanadium and the balance of iron; the casting infiltration agent is obtained by uniformly mixing high-carbon ferrochromium powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder with the average particle size of 150 mu m.
Example 2
The casting infiltration agent of the embodiment comprises the following components in percentage by mass: 50% of chromium, 3% of carbon, 1% of molybdenum, 1% of manganese, 1% of vanadium and the balance of iron; the casting infiltration agent is obtained by uniformly mixing high-carbon ferrochromium powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder with the average particle size of 120 mu m.
Example 3
The casting infiltration agent of the embodiment comprises the following components in percentage by mass: 60% of chromium, 4% of carbon, 1.5% of molybdenum, 1.2% of manganese, 1.5% of vanadium and the balance of iron; the casting infiltration agent is obtained by uniformly mixing high-carbon ferrochromium powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder with the average particle size of 130 mu m.
Example 4
The casting infiltration agent of the present example is different from the casting infiltration agent of example 1 in that: the casting infiltration agent of the embodiment is obtained by uniformly mixing high-carbon ferrochromium powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder with the average particle size of 80 μm.
Example 5
The casting infiltration agent of the present embodiment is different from the casting infiltration agent of the embodiment 2 only in that: the casting infiltration agent of the embodiment is obtained by uniformly mixing high-carbon ferrochromium powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder with the average particle size of 200 μm.
Examples of wear resistant Steel castings
Example 1
The wear-resistant steel casting comprises a steel casting base body and a cast-infiltration layer arranged on the surface of the steel casting base body, wherein the cast-infiltration layer comprises the following components in percentage by mass: 70% of chromium, 5% of carbon, 2% of molybdenum, 1.5% of manganese, 2% of vanadium and the balance of iron; the thickness of the cast-infiltration layer is 10 mm; the steel casting base body comprises the following components in percentage by mass: c: 0.40%, Si: 0.50%, Mn: 2.4%, Cr: 1.4%, Ni: 0.5%, Mo: 0.3%, Nb: 0.02%, B: 0.05%, S: 0.004%, P: 0.003% and the balance Fe. The cast-infiltration layer comprises lath martensite structure with high wear resistance and chromium carbide and vanadium carbide which are dispersed and distributed.
Example 2
The wear-resistant steel casting comprises a steel casting base body and a cast-infiltration layer arranged on the surface of the steel casting base body, wherein the cast-infiltration layer comprises the following components in percentage by mass: 50% of chromium, 3% of carbon, 1% of molybdenum, 1% of manganese, 1% of vanadium and the balance of iron; the thickness of the cast-infiltration layer is 6 mm; the steel casting base body comprises the following components in percentage by mass: c: 0.35%, Si: 0.30%, Mn: 1.8%, Cr: 0.9%, Ni: 0.3%, Mo: 0.2%, Nb: 0.01%, B: 0.03%, S: 0.003%, P: 0.004%, and the balance of iron. The cast-infiltration layer comprises lath martensite structure with high wear resistance and chromium carbide and vanadium carbide which are dispersed and distributed.
Example 3
The wear-resistant steel casting comprises a steel casting base body and a cast-infiltration layer arranged on the surface of the steel casting base body, wherein the cast-infiltration layer comprises the following components in percentage by mass: 60% of chromium, 4% of carbon, 1.5% of molybdenum, 1.2% of manganese, 1.5% of vanadium and the balance of iron; the thickness of the cast-infiltration layer is 8 mm; the steel casting base body comprises the following components in percentage by mass: c: 0.4%, Si: 0.4%, Mn: 2.0%, Cr: 1.2%, Ni: 0.4%, Mo: 0.25%, Nb: 0.02%, B: 0.04%, S: 0.003%, P: 0.004%, and the balance of iron. The cast-infiltration layer comprises lath martensite structure with high wear resistance and chromium carbide and vanadium carbide which are dispersed and distributed.
Examples of methods for producing wear-resistant steel castings
Example 1
The preparation method of the wear-resistant steel casting comprises the following steps:
1) according to 70g of chromium, 5g of carbon, 2g of molybdenum, 1.5g of manganese, 2g of vanadium and the balance of iron in 100g of alloy powder, respectively weighing high-carbon ferrochromium powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder with the average particle size of 150 mu m to prepare alloy powder, and uniformly mixing the alloy powder by using a ball mill to obtain a casting infiltration agent for later use;
2) adding a mixed solution of 0.5g of polyvinyl butyral and 8.5g of absolute ethyl alcohol into each 100g of casting infiltration agent prepared in the step 1), and uniformly stirring to obtain a casting infiltration coating; then coating the obtained cast infiltration coating on the surface of a mold cavity corresponding to the part of the casting requiring wear resistance, coating the cast infiltration coating with the thickness of 9mm, igniting the cast infiltration coating, and curing the coating for later use;
3) pouring molten steel with the temperature of 1680 ℃ into the casting mould in the step 2), naturally cooling, and taking out the casting to obtain a casting infiltration layer with the thickness of 10 mm.
The poured molten steel is low alloy steel and comprises the following components in percentage by mass: c: 0.40%, Si: 0.50%, Mn: 2.4%, Cr: 1.4%, Ni: 0.5%, Mo: 0.3%, Nb: 0.02%, B: 0.05%, S: 0.004%, P: 0.003% and the balance Fe.
Example 2
The preparation method of the wear-resistant steel casting comprises the following steps:
1) according to the method, high-carbon ferrochromium powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder with the average particle size of 120 mu m are respectively weighed according to 50g of chromium, 3g of carbon, 1g of molybdenum, 1g of manganese, 1g of vanadium and the balance of iron in 100g of alloy powder to prepare alloy powder, and the alloy powder is uniformly mixed by a ball mill to obtain a casting infiltration agent for later use;
2) adding a mixed solution of 0.8g of polyvinyl butyral and 11.7g of absolute ethyl alcohol into each 100g of casting infiltration agent prepared in the step 1), and uniformly stirring to obtain a casting infiltration coating; then coating the obtained cast infiltration coating on the surface of a mold cavity corresponding to the part of the casting requiring wear resistance, coating the cast infiltration coating with the thickness of 5mm, igniting the cast infiltration coating, and curing the coating for later use;
3) pouring the molten steel with the temperature of 1580 ℃ into the casting mould in the step 2), naturally cooling, and taking out the casting to obtain a casting infiltration layer with the thickness of 6 mm.
The poured molten steel is low alloy steel and comprises the following components in percentage by mass: c: 0.35%, Si: 0.30%, Mn: 1.8%, Cr: 0.9%, Ni: 0.3%, Mo: 0.2%, Nb: 0.01%, B: 0.03%, S: 0.003%, P: 0.004%, and the balance of iron.
Example 3
The preparation method of the wear-resistant steel casting comprises the following steps:
1) according to 60g of chromium, 4g of carbon, 1.5g of molybdenum, 1.2g of manganese, 1.5g of vanadium and the balance of iron in 100g of alloy powder, respectively weighing high-carbon ferrochromium powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder with the particle sizes of 130 mu m to prepare alloy powder, and uniformly mixing the alloy powder by using a ball mill to obtain a casting infiltration agent for later use;
2) adding a mixed solution of 0.6g of polyvinyl butyral and 9.4g of absolute ethyl alcohol into each 100g of casting infiltration agent prepared in the step 1), and uniformly stirring to obtain a casting infiltration coating; then coating the obtained cast infiltration coating on the surface of a mold cavity corresponding to the part of the casting requiring wear resistance, coating the cast infiltration coating with the thickness of 7mm, igniting the cast infiltration coating, and curing the coating for later use;
3) pouring the molten steel with the temperature of 1630 ℃ into the casting mold in the step 2), naturally cooling, and taking out the casting to obtain a casting infiltration layer with the thickness of 8 mm.
The poured molten steel is low alloy steel and comprises the following components in percentage by mass: c: 0.4%, Si: 0.4%, Mn: 2.0%%, Cr: 1.2%, Ni: 0.4%, Mo: 0.25%, Nb: 0.02%, B: 0.04%, S: 0.003%, P: 0.004%, and the balance of iron.
Example 4
The method for producing the wear-resistant steel casting of the present example is different from the method for producing the wear-resistant steel casting of example 1 only in that: the average grain sizes of the high-carbon ferrochromium powder, the ferromolybdenum powder, the ferromanganese powder, the ferrovanadium powder and the iron powder adopted in the step 1) are all 80 microns.
Example 5
The method for producing the wear-resistant steel casting of the present example is different from the method for producing the wear-resistant steel casting of example 2 only in that: the average grain sizes of the high-carbon ferrochromium powder, the ferromolybdenum powder, the ferromanganese powder, the ferrovanadium powder and the iron powder adopted in the step 1) are all 200 mu m.
Examples of the experiments
According to the national standard GB/T230.1-2018 part 1 of Rockwell hardness test of metal materials: test methods, the cast-infiltration layers of the wear-resistant steel castings prepared in the above preparation methods of examples 1 to 5 were respectively subjected to rockwell hardness tests, and the test results are shown in table 1.
TABLE 1 Performance test results of wear-resistant steel casting cast-infiltration layer
| Item | Rockwell Hardness (HRC) |
| Example 1 | 61.5 |
| Example 2 | 57.0 |
| Example 3 | 60.5 |
| Example 4 | 60.4 |
| Example 5 | 61.2 |
As can be seen from Table 1, the cast-infiltration layer of the wear-resistant steel casting of the invention has the advantages of high hardness and good wear resistance.
Claims (9)
1. A casting infiltration agent, which is characterized in that: the composite material comprises the following components in percentage by mass: 50-70% of chromium, 3-5% of carbon, 1-2% of molybdenum, 1-1.5% of manganese, 1-2% of vanadium and the balance of iron; the casting infiltration agent is prepared by mixing high-carbon ferrochrome powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder.
2. The infiltrant according to claim 1, wherein: the average grain size of the casting infiltration agent is 80-200 mu m.
3. A wear-resistant steel casting is characterized in that: the casting infiltration agent comprises a steel casting base body and a casting infiltration layer arranged on the surface of the steel casting base body, wherein the casting infiltration agent used in the preparation of the casting infiltration layer comprises the following components in percentage by mass: 50-70% of chromium, 3-5% of carbon, 1-2% of molybdenum, 1-1.5% of manganese, 1-2% of vanadium and the balance of iron; the casting infiltration agent is prepared by mixing high-carbon ferrochrome powder, ferromolybdenum powder, ferromanganese powder, ferrovanadium powder and iron powder.
4. A wear resistant steel casting according to claim 3 characterized in that: the steel casting base body is low alloy steel.
5. A wear resistant steel casting according to claim 3 or 4 characterized in that: the steel casting base body comprises the following components in percentage by mass: 0.35-0.40% of C, 0.30-0.50% of Si, 1.8-2.4% of Mn, 0.9-1.4% of Cr, 0.3-0.5% of Ni, 0.2-0.3% of Mo, 0.01-0.02% of Nb, 0.03-0.05% of B, less than or equal to 0.005% of S, less than or equal to 0.005% of P, and the balance of Fe.
6. A wear resistant steel casting according to claim 3 characterized in that: the thickness of the cast-infiltration layer is 6-10 mm.
7. A method of making a wear resistant steel casting according to claim 3 characterized by: the method comprises the following steps:
providing a casting infiltration agent consistent with the composition of the casting infiltration layer;
providing a casting infiltration coating mainly consisting of the casting infiltration agent, an organic binder and an organic solvent;
and coating the casting infiltration coating on the surface of the mold cavity of the mold, then igniting the casting infiltration coating coated on the mold cavity of the mold, injecting molten steel into the mold cavity of the mold after the coating is solidified, and cooling.
8. A method of making a wear resistant steel casting according to claim 7 characterized in that: the average grain size of the casting infiltration agent is 80-200 mu m.
9. A method of making a wear resistant steel casting according to claim 7 characterized in that: the coating thickness of the casting infiltration coating on the surface of the cavity of the casting mold is 5-9 mm.
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| CN201811518352.0A CN109454202B (en) | 2018-12-12 | 2018-12-12 | Casting infiltration agent, wear-resistant steel casting and preparation method thereof |
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| CN201811518352.0A CN109454202B (en) | 2018-12-12 | 2018-12-12 | Casting infiltration agent, wear-resistant steel casting and preparation method thereof |
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| CN112570687A (en) * | 2019-09-29 | 2021-03-30 | 洛阳钢丰机械制造有限公司 | Special alloy composite casting process |
| CN113145829A (en) * | 2021-01-29 | 2021-07-23 | 自贡长城硬面材料有限公司 | Preparation method of composite wear-resistant element |
| CN112962019B (en) * | 2021-02-03 | 2022-03-04 | 河南科技大学 | High-wear-resistance steel-based composite material and preparation method thereof |
| CN114011887B (en) * | 2021-10-18 | 2023-01-17 | 马鞍山市方圆材料工程股份有限公司 | Outlet guide for lost foam composite casting and production process |
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