CN114836689B - High-chromium wear-resistant steel ball and preparation method thereof - Google Patents
High-chromium wear-resistant steel ball and preparation method thereof Download PDFInfo
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- CN114836689B CN114836689B CN202210439816.9A CN202210439816A CN114836689B CN 114836689 B CN114836689 B CN 114836689B CN 202210439816 A CN202210439816 A CN 202210439816A CN 114836689 B CN114836689 B CN 114836689B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 63
- 239000010959 steel Substances 0.000 title claims abstract description 63
- 239000011651 chromium Substances 0.000 title claims abstract description 60
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 21
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 18
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000005266 casting Methods 0.000 claims description 22
- 238000003723 Smelting Methods 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 239000013078 crystal Substances 0.000 description 6
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- 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
- C22C38/18—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
-
- 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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a high-chromium wear-resistant steel ball and a preparation method thereof, wherein the high-chromium wear-resistant steel ball comprises the following chemical components in percentage by mass: c:0.5-1.1%, cr:11.1-13.2%, si:0.1-0.5%, mn:1.25-1.48%, ni:0.18-1.1%, ti:0.55-0.79%, V + Nb:0.25-0.38%, sn:0.01-0.03%, W:0.15 to 0.72 percent of Fe, less than or equal to 0.04 percent of P, less than or equal to 0.04 percent of S, and the balance of Fe and inevitable impurities. The preparation method of the high-chromium wear-resistant steel ball provided by the invention is simple in process, and the obtained steel ball is high in hardness, good in toughness, excellent in wear resistance and long in service life.
Description
Technical Field
The invention relates to the technical field of wear-resistant materials, in particular to a high-chromium wear-resistant steel ball and a preparation method thereof.
Background
The steel balls of the ball mill are grinding material media of ball mill equipment, are important basic parts of the ball mill, and are used in a large number in the market. The high-chromium steel contains a large amount of carbides and has good wear resistance, but the high-chromium steel has the defect of low impact toughness due to the large amount of carbides, and the wear-resistant steel ball made of the high-chromium steel is easy to crack in the using process, so that the service life of the wear-resistant steel ball is seriously influenced.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a high-chromium wear-resistant steel ball and a preparation method thereof.
The invention provides a high-chromium wear-resistant steel ball, which comprises the following chemical components in percentage by mass: c:0.5-1.1%, cr:11.1-13.2%, si:0.1-0.5%, mn:1.25-1.48%, ni:0.18-1.1%, ti:0.55-0.79%, V + Nb:0.25-0.38%, sn:0.01-0.03%, W:0.15 to 0.72 percent of Fe, less than or equal to 0.04 percent of P, less than or equal to 0.04 percent of S, and the balance of Fe and inevitable impurities.
Preferably, the chemical composition further comprises Mo:0.3-0.78%, B:0.001-0.003%.
Preferably, in the chemical composition, the mass percentages of V and Nb satisfy the following relational expression: v = Nb +0.045%.
Preferably, the chemical composition of the alloy contains Mn and Cr in percentage by mass, and the mass percentage of Mn and Cr satisfies the following relational expression: mn +0.5 multiplied by Cr is more than or equal to 7.8 percent.
Preferably, the chemical composition of the alloy comprises the following relational expression of the mass percentages of Ti, W and C: 2 xTi + C is not less than 3 xW.
Preferably, the high-chromium wear-resistant steel ball comprises the following chemical components in percentage by mass: c:0.5%, cr:13%, si:0.15%, mn:1.32%, ni:0.87%, ti:0.71%, V:0.175%, nb:0.13%, sn:0.018%, W:0.5%, mo:0.6%, B:0.002%, P less than or equal to 0.04%, S less than or equal to 0.04%, and the balance of Fe and inevitable impurities.
The invention also provides a preparation method of the high-chromium wear-resistant steel ball, which comprises the following steps:
s1, putting required raw materials into a vacuum medium-frequency induction furnace for smelting, and pouring to obtain a casting;
s2, heating the casting to T ℃, preserving heat for 2-3.5h, cooling the oil to room temperature, heating to 1020-1150 ℃, preserving heat for 2-3h, cooling to room temperature, heating to 250-380 ℃, preserving heat for 2-3h, and cooling in a furnace to room temperature; wherein T =656+ (3000-4000). Times.C Cr ，C Cr Is the mass percent of Cr.
Preferably, in S2, the cooling speed is 0.1-0.2 ℃/S in the process of cooling to the room temperature.
C is a basic element for ensuring the strength and the wear resistance, the too low steel has high toughness but low strength and wear resistance, and the too high C generates an acicular martensite structure in the heat treatment process to reduce the toughness, and the range of 0.5 to 1.1 percent is specifically selected in the invention;
cr can improve the hardenability, strength and corrosion resistance of steel; too high Cr reduces toughness; in the invention, the Cr is selected in the range of 11.1-13.2%, and the Cr and the carbon act synergistically to enable a matrix to obtain a lath martensite structure;
si is used as a deoxidizer in steel, and in the invention, the Si is specifically selected to be 0.1-0.5%, so that the toughness of the steel is maintained while the deoxidizing effect is ensured;
mn is added into steel to enable the steel to have excellent strength and low-temperature toughness, in the invention, the Mn content needs to reach more than 1.25 percent, however, the low-temperature toughness is reduced due to excessive Mn element, and in the invention, the Mn content needs to be less than 1.48 percent;
meanwhile, the mass percent of Mn and Cr satisfies the relational expression of Mn +0.5 multiplied by Cr which is more than or equal to 7.8 percent and is formed in the system (Fe.Mn) 3 C、(Fe.Cr) 3 C and other carbides, and improves the hardenability of the steel, and improves the hardness and strength of the steel ball;
ni can improve hardenability, is an element for expanding austenite, avoids ferrite, and is beneficial to improving strength and toughness;
when Ti is added to the system, nitrides can be generated and crystal grains can be refined, and the content of Ti is specifically limited to 0.55% or more, but when Ti is contained in an amount exceeding 0.79%, toughness deterioration due to carbides formed by Ti becomes remarkable;
v is added into a system, and carbonitrides can be precipitated during tempering of the material, so that the strength of the steel is improved, but the toughness is also deteriorated due to the excessively high content of the carbonitrides;
nb is a strong carbide forming element, can form high-melting point stable carbide with carbon when added into steel, can be used as a heterogeneous crystal nucleus in the solidification process, increases the nucleation rate, refines the crystal structure, and can prevent the growth of austenite grains due to the existence of NbC mass points at the austenitizing temperature;
v + Nb is added according to the mass ratio of 0.25-0.38%, and simultaneously the mass percentages of V and Nb satisfy the relation V = Nb +0.045%, the composite action of the V and Nb is exerted, so that substances such as VC and Nb (C, N) are formed, the growth of crystal grains is inhibited, the quenching performance of steel is improved, and the obtained steel ball has better strength and toughness;
sn is added into the system, so that the corrosion resistance of the steel can be improved;
the addition of W can favorably improve the hardenability of the steel and the strength of the steel, however, the steel-making difficulty is increased by excessively adding W, and the W is specifically limited to be 0.15-0.72 percent in the invention;
meanwhile, the mass percentages of Ti, W and C meet the relation that 2 xTi + C is more than or equal to 3 xW, tiC carbide is formed in the system and used as a crystal core to refine crystal grains, and (Ti, W) C is formed, and the TiC and the (Ti, W) C are dispersed in the matrix, so that the wear resistance is improved.
According to the high-chromium wear-resistant steel ball, C, cr, si, mn, ni, ti, V, nb, sn, W, mo and B are specifically selected to be added into a system, the content of each element is optimized, and the mass percentage relationship between V and Nb, between Mn and Cr, and between Ti, W and C is controlled, so that the obtained steel ball is good in toughness, high in hardness, excellent in wear resistance and long in service life; in the preparation process of the steel ball, firstly, the casting is heated to T ℃ for treatment, and T =656+ (3000-4000). Times.C Cr ，C Cr The mass percentage of Cr is used to make the structure and components of the matrix more uniform, and the structure is further refined through the subsequent heat treatment process, so that the obtained steel ball has excellent toughness and wear resistance.
The high-chromium wear-resistant steel ball is subjected to performance detection, the surface hardness is more than or equal to 55HRC, and the impact toughness is more than or equal to 18J/cm 2 The impact fatigue life of falling ball is more than or equal to 15200 times.
The wear-resistant steel balls are selected and compared with the wear-resistant steel balls on the same market under the same condition, and experiments show that the wear-resistant steel balls in the invention are not worn, and part of grinding balls in the comparison example are worn.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
The invention provides a high-chromium wear-resistant steel ball which comprises the following chemical components in percentage by mass: c:1.1%, cr:12.9%, si:0.1%, mn:1.48%, ni:1.1%, ti:0.55%, V:0.1475%, nb:0.1025%, sn:0.03%, W:0.15%, P:0.04%, S:0.04%, and the balance of Fe and inevitable impurities.
The invention also provides a preparation method of the high-chromium wear-resistant steel ball, which comprises the following steps:
s1, putting required raw materials into a vacuum medium-frequency induction furnace for smelting, and pouring to obtain a casting;
s2, heating the casting to 1043 ℃, keeping the temperature for 2h, cooling the casting to room temperature with oil, heating to 1150 ℃, keeping the temperature for 2h, cooling to room temperature at the cooling speed of 0.2 ℃/S, heating to 380 ℃, keeping the temperature for 2h, and cooling in a furnace to room temperature.
Example 2
The invention provides a high-chromium wear-resistant steel ball which comprises the following chemical components in percentage by mass: c:0.5%, cr:13.2%, si:0.5%, mn:1.25%, ni:0.18%, ti:0.79%, V:0.2125%, nb:0.1675%, sn:0.01%, W:0.69%, mo:0.3%, B:0.003%, P:0.04%, S:0.04%, and the balance of Fe and inevitable impurities.
The invention also provides a preparation method of the high-chromium wear-resistant steel ball, which comprises the following steps:
s1, putting required raw materials into a vacuum medium-frequency induction furnace for smelting, and pouring to obtain a casting;
s2, heating the casting to 1052 ℃, preserving heat for 3.5h, cooling oil to room temperature, heating to 1020 ℃, preserving heat for 3h, cooling to room temperature at a cooling speed of 0.1 ℃/S, heating to 250 ℃, preserving heat for 3h, and cooling the furnace to room temperature.
Example 3
The invention provides a high-chromium wear-resistant steel ball, which comprises the following chemical components in percentage by mass: c:1%, cr:13.2%, si:0.13%, mn:1.25%, ni:0.9%, ti:0.7%, V:0.18%, nb:0.135%, sn:0.014%, W:0.7%, mo:0.78%, B:0.001%, P:0.04%, S:0.04%, and the balance of Fe and inevitable impurities.
The invention also provides a preparation method of the high-chromium wear-resistant steel ball, which comprises the following steps:
s1, putting required raw materials into a vacuum medium-frequency induction furnace for smelting, and pouring to obtain a casting;
s2, heating the casting to 1118 ℃, preserving heat for 2.3h, cooling the casting with oil to room temperature, heating to 1100 ℃, preserving heat for 2h, cooling to room temperature at a cooling speed of 0.15 ℃/S, heating to 320 ℃, preserving heat for 2.5h, and cooling in a furnace to room temperature.
Example 4
The invention provides a high-chromium wear-resistant steel ball, which comprises the following chemical components in percentage by mass: c:0.7%, cr:13%, si:0.4%, mn:1.48%, ni:0.3%, ti:0.7%, V:0.165%, nb:0.12%, sn:0.02%, W:0.18%, mo:0.4%, B:0.0023%, P:0.04%, S:0.04%, and the balance of Fe and inevitable impurities.
The invention also provides a preparation method of the high-chromium wear-resistant steel ball, which comprises the following steps:
s1, putting required raw materials into a vacuum medium-frequency induction furnace for smelting, and pouring to obtain a casting;
s2, heating the casting to 1100 ℃, preserving heat for 3h, cooling the casting to room temperature, heating to 1050 ℃, preserving heat for 3h, cooling to room temperature at a cooling speed of 0.18 ℃/S, heating to 250 ℃, preserving heat for 2.8h, and cooling in a furnace to room temperature.
Example 5
The invention provides a high-chromium wear-resistant steel ball which comprises the following chemical components in percentage by mass: c:0.6%, cr:12.7%, si:0.19%, mn:1.45%, ni:0.18%, ti:0.79%, V:0.18%, nb:0.135%, sn:0.01%, W:0.58%, mo:0.7%, B:0.0011%, P:0.04%, S:0.04%, and the balance of Fe and inevitable impurities.
The invention also provides a preparation method of the high-chromium wear-resistant steel ball, which comprises the following steps:
s1, putting required raw materials into a vacuum medium-frequency induction furnace for smelting, and pouring to obtain a casting;
s2, heating the casting to 1037 ℃, preserving heat for 3h, cooling the casting to room temperature with oil, heating to 1080 ℃, preserving heat for 2.5h, cooling to room temperature at the cooling speed of 0.1 ℃/S, heating to 350 ℃, preserving heat for 2h, and cooling in a furnace to room temperature.
Example 6
The invention provides a high-chromium wear-resistant steel ball which comprises the following chemical components in percentage by mass: c:0.5%, cr:13%, si:0.15%, mn:1.32%, ni:0.87%, ti:0.71%, V:0.175%, nb:0.13%, sn:0.018%, W:0.5%, mo:0.6%, B:0.002%, P:0.04%, S:0.04%, and the balance of Fe and inevitable impurities.
The invention also provides a preparation method of the high-chromium wear-resistant steel ball, which comprises the following steps:
s1, putting required raw materials into a vacuum medium-frequency induction furnace for smelting, and pouring to obtain a casting;
s2, heating the casting to 1150 ℃, preserving heat for 3h, cooling the casting to room temperature, heating to 1020 ℃, preserving heat for 2h, cooling to room temperature at a cooling speed of 0.1 ℃/S, heating to 300 ℃, preserving heat for 2h, and cooling in a furnace to room temperature.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The preparation method of the high-chromium wear-resistant steel ball is characterized by comprising the following steps of:
s1, putting required raw materials into a vacuum medium-frequency induction furnace for smelting, and pouring to obtain a casting;
s2, heating the casting to T ℃, preserving heat for 2-3.5h, cooling the oil to room temperature, heating to 1020-1150 ℃, preserving heat for 2-3h, cooling to room temperature, heating to 250-380 ℃, preserving heat for 2-3h, and cooling in a furnace to room temperature; wherein, T =656+ (3000-4000). Times.C Cr ，C Cr Is the mass percentage of Cr;
the high-chromium wear-resistant steel ball comprises the following chemical components in percentage by mass: c:0.5-1.1%, cr:11.1-13.2%, si:0.1-0.5%, mn:1.25-1.48%, ni:0.18-1.1%, ti:0.55-0.79%, V + Nb:0.25-0.38%, sn:0.01-0.03%, W:0.15 to 0.72 percent of Fe, less than or equal to 0.04 percent of P, less than or equal to 0.04 percent of S, and the balance of Fe and inevitable impurities.
2. The method for preparing the high-chromium wear-resistant steel ball as claimed in claim 1, wherein the chemical components of the high-chromium wear-resistant steel ball further comprise Mo:0.3-0.78%, B:0.001-0.003%.
3. The method for preparing the high-chromium wear-resistant steel ball according to the claim 1 or 2, wherein the mass percentages of V and Nb in the chemical components of the high-chromium wear-resistant steel ball satisfy the following relational expression: v = Nb +0.045%.
4. The method for preparing the high-chromium wear-resistant steel ball as claimed in claim 1 or 2, wherein the chemical components of the high-chromium wear-resistant steel ball comprise Mn and Cr in percentage by mass, and the mass percentage of Mn and Cr in the chemical components of the high-chromium wear-resistant steel ball satisfies the following relational expression: mn +0.5 multiplied by Cr is more than or equal to 7.8 percent.
5. The method for preparing the high-chromium wear-resistant steel ball as claimed in claim 1 or 2, wherein the chemical components of the high-chromium wear-resistant steel ball comprise Ti, W and C in percentage by mass which satisfy the following relational expression: 2 xTi + C is not less than 3 xW.
6. The method for preparing the high-chromium wear-resistant steel ball as claimed in claim 1 or 2, wherein the chemical components of the high-chromium wear-resistant steel ball comprise, by mass: c:0.5%, cr:13%, si:0.15%, mn:1.32%, ni:0.87%, ti:0.71%, V:0.175%, nb:0.13%, sn:0.018%, W:0.5%, mo:0.6%, B:0.002%, P is less than or equal to 0.04%, S is less than or equal to 0.04%, and the balance is Fe and inevitable impurities.
7. The method for preparing the high-chromium wear-resistant steel ball according to the claim 1, wherein in the step S2, the cooling speed is 0.1-0.2 ℃/S in the process of cooling to the room temperature.
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| JP4975448B2 (en) * | 2004-12-15 | 2012-07-11 | エヌケーケーシームレス鋼管株式会社 | 655 MPa grade martensitic stainless steel excellent in toughness and method for producing the same |
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Denomination of invention: A high chromium wear-resistant steel ball and its preparation method Granted publication date: 20230407 Pledgee: China Postal Savings Bank Limited by Share Ltd. Ningguo branch Pledgor: NINGGUO DONGFANG MILLING MATERIAL CO.,LTD. Registration number: Y2024980000862 |