WO2018116763A1 - 鋳鉄、鋳鉄の製造方法およびシリンダーブロック - Google Patents

鋳鉄、鋳鉄の製造方法およびシリンダーブロック Download PDF

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WO2018116763A1
WO2018116763A1 PCT/JP2017/042680 JP2017042680W WO2018116763A1 WO 2018116763 A1 WO2018116763 A1 WO 2018116763A1 JP 2017042680 W JP2017042680 W JP 2017042680W WO 2018116763 A1 WO2018116763 A1 WO 2018116763A1
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cast iron
mass
less
present
content
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PCT/JP2017/042680
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English (en)
French (fr)
Japanese (ja)
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和貴 兼平
重宏 金谷
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株式会社クボタ
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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
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/04—Cast-iron alloys containing spheroidal graphite
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or silicon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 

Definitions

  • the present invention relates to cast iron having both high wear resistance and castability and a method for producing the same.
  • the present invention also relates to a cylinder block including the cast iron.
  • the cylinder block which is one of the members constituting the internal combustion engine, includes a mechanism for sliding the cylinder by the explosion of fuel, and the material constituting the mechanism is required to have high wear resistance. This is because, when the wear resistance of the material is low, there is a possibility that piston seizure, deterioration of airtightness, etc. may occur. And in order to make the output of an internal combustion engine higher, it is necessary to make the abrasion resistance of the said material higher.
  • cast iron which is a material having high wear resistance, is widely used as a cylinder block material. Further, cast iron having higher wear resistance and advantageous physical properties other than wear resistance has been developed.
  • Patent Document 1 C: 3.2 to 3.6% by weight, Si: 1.7 to 2.4% by weight, Mn: 0.45 to 0.9% by weight, P: 0.2% by weight
  • a cast iron having a CE value of 3.8 to 3.95 is disclosed.
  • Patent Document 2 C: 2.9 to 3.6% by mass, Si: 2.0 to 2.5% by mass, Mn: 0.5 to 1.0% by mass, P: 0.03 to 0.3% %
  • Patent Document 3 by weight, C: 3.2 to 3.49%, Si: 1.8 to 2.2%, S: less than 0.15%, P: less than 0.15%, Mn: 0.8. 3 to 0.8%, Cr: 0.2 to 0.4%, Mo: 0.1 to 0.4%, V: 0.03 to 0.3%, Cu: 0.3 to 1.0% Nb: less than 0.15% and others: substantially pearlite gray cast iron alloy containing iron and impurities.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 2003-253375 (published on September 10, 2003)” Japanese Patent Publication “Japanese Patent Laid-Open No. 2008-106357 (published May 8, 2008)” Japanese Patent Gazette “Special Table 2005-525468 (published August 25, 2005)”
  • An object of one embodiment of the present invention is to provide cast iron that achieves both high wear resistance and castability.
  • the present inventors have found that the above problem can be solved by making the Cu content higher than usual. Based on the above findings, the present inventors have completed the present invention. That is, the present invention includes the following inventions.
  • a cylinder block comprising the cast iron according to any one of ⁇ 1> to ⁇ 4>.
  • a method for producing cast iron comprising preparing a molten metal and casting the molten metal into a mold by a gravity casting method or a centrifugal casting method.
  • cast iron having both wear resistance and castability is provided.
  • Example 1 is the schematic showing the method of the hot water flow test performed in Example 1 (refer to [1-4] section of an Example). One end of each of the cast iron test pieces 1 to 3 is provided with a runner through which the molten metal flows.
  • B is the schematic showing the method of the abrasion test performed in Example 2.
  • FIG. (A) to (e) are the results of a hot water flow test of the test piece prepared in Example 1 (see the section [1-4] in the example).
  • (A) to (c) are metallographic microscopic images obtained by observing the structure of the test piece prepared in Example 1 (see the section [1-5] in the example).
  • Example 2 it is a graph showing the result of the abrasion resistance test performed with respect to invention material and FC material.
  • a to B representing a numerical range means “A or more and B or less”, and when “%” is simply written, it means mass%.
  • the wear resistance of cast iron according to an embodiment of the present invention can be evaluated by, for example, the method described in Example 2.
  • the wear amount of the cast iron when evaluated by the above method is preferably 0.80 ⁇ m or less.
  • the Brinell hardness of the material can be measured, for example, by a method in which a cemented carbide ball having a diameter of 10 mm is pushed into the material with a load of 29,400 N and the load is removed by the surface area of the depression generated at that time.
  • the Brinell hardness of the cast iron according to an embodiment of the present invention is preferably 205 HB or more, and more preferably 220 HB or more, from the viewpoint that high abrasion resistance as described above can be expected.
  • the Brinell hardness of the cast iron is preferably 255 HB or less, and more preferably 250 HB or less.
  • the tensile strength of the material can be measured by, for example, a metal material tensile test.
  • the tensile strength of the cast iron is preferably 240 MPa or more from the viewpoint of ensuring the strength of the product obtained by processing the cast iron according to one embodiment of the present invention.
  • the elastic modulus of the material can be measured by, for example, a metal material tensile test.
  • the elastic modulus of the cast iron according to the embodiment of the present invention is preferably 80 GPa or more from the viewpoint of ensuring the rigidity of the product obtained by processing the cast iron according to the embodiment of the present invention.
  • hot water flowability As an index of castability, for example, hot water flowability can be employed.
  • hot water flowability intends the flowability of molten metal.
  • the hot water flowability can be evaluated by, for example, the method described in Example 1 (see FIG. 1). According to the above-described method, the small hot water runoff portion generated in the cast iron test pieces 1 to 3 is small, and in particular, the small hot runout defective portion generated in the test piece 3 means high hot water flowability. .
  • the cast iron according to an embodiment of the present invention can have both the above-described wear resistance and castability at suitable values by having a specific composition described in detail below.
  • Cast iron having such physical properties is suitable as a material for, for example, a cylinder block because it can withstand abrasion due to sliding and can be cast into a complicated shape.
  • the carbon contained in the cast iron according to an embodiment of the present invention is preferably 3.8% by mass or less, and more preferably 3.5% by mass or less. When the carbon content exceeds 3.8% by mass, excessive crystallization amount of graphite and excessive growth of crystallized graphite occur, and the strength of the cast iron decreases.
  • the carbon contained in the cast iron according to an embodiment of the present invention is preferably 3.0% by mass or more, more preferably 3.1% by mass or more, and still more preferably 3.3% by mass or more.
  • the carbon content is less than 3.0% by mass, excessive reduction of the crystallization amount of graphite and excessive refinement of the crystallized graphite occur, and the castability of the cast iron decreases.
  • the silicon contained in the cast iron according to one embodiment of the present invention is preferably 3.0% by mass or less, and more preferably 2.3% by mass or less. When the silicon content exceeds 3.0% by mass, excessive crystallization amount of graphite and excessive growth of crystallized graphite occur, and the strength of the cast iron decreases.
  • the silicon contained in the cast iron according to an embodiment of the present invention is preferably 1.0% by mass or more, more preferably 1.5% by mass or more, and further preferably 1.7% by mass or more.
  • the silicon content is less than 1.0% by mass, excessive reduction of the crystallization amount of graphite and excessive refinement of the crystallized graphite occur, and the castability of the cast iron is lowered.
  • the manganese contained in the cast iron according to an embodiment of the present invention is preferably 1.0% by mass or less, and more preferably 0.8% by mass or less.
  • the manganese content exceeds 1.0% by mass, the pearlite of the base structure is excessively densified. Therefore, when the thickness of the cast product is 5 mm or less, the base structure may be transformed into martensite or bainite. As a result, since martensite and bainite are both hard structures, the workability of the cast iron is lowered.
  • the manganese contained in the cast iron according to an embodiment of the present invention is preferably 0.6% by mass or more, and more preferably 0.7% by mass or more.
  • the manganese content is less than 0.6% by mass, the pearlite of the cast iron base structure becomes coarse and the hardness decreases.
  • the chromium contained in the cast iron according to an embodiment of the present invention is preferably 0.6% by mass or less, and more preferably 0.4% by mass or less. When the chromium content exceeds 0.6% by mass, a carbide is formed between chromium and carbon, and the workability of the cast iron is lowered.
  • the chromium contained in the cast iron according to an embodiment of the present invention preferably exceeds 0% by mass, more preferably 0.1% by mass or more, and further preferably 0.2% by mass or more. When chromium is not contained, the hardness of the cast iron matrix structure is lowered.
  • copper 1.6 mass% or less is preferable and, as for the copper which the cast iron which concerns on one Embodiment of this invention contains, 1.1 mass% or less is more preferable.
  • the copper content exceeds 1.6% by mass, the probability that the total content of copper and molybdenum becomes too high is high. In this case, the base structure of the cast iron is transformed into martensite or bainite, and the workability of the cast iron is lowered.
  • the copper contained in the cast iron according to an embodiment of the present invention is preferably 0.6% by mass or more, more preferably 0.7% by mass or more, and further preferably 0.9% by mass or more.
  • the copper content is less than 0.6% by mass, (i) the castability of the cast iron is reduced, (ii) the pearlite of the base structure is coarsened, and (iii) the hardness of the base structure is reduced.
  • the molybdenum contained in the cast iron according to an embodiment of the present invention is preferably 0.4% by mass or less, more preferably 0.35% by mass or less, and further preferably 0.2% by mass or less.
  • the molybdenum content exceeds 0.4% by mass, the hardness of the matrix structure becomes excessive, and carbides are formed between molybdenum and carbon. As a result, the workability of the cast iron is reduced. Further, if the total content of copper and molybdenum becomes too high, the base structure is transformed into martensite or bainite. This also causes a decrease in the workability of the cast iron.
  • the molybdenum contained in the cast iron according to an embodiment of the present invention is preferably 0.01% by mass or more, and more preferably 0.1% by mass or more.
  • the molybdenum content is less than 0.01% by mass, the hardness of the cast iron matrix structure is lowered, and pearlite at high temperatures becomes unstable.
  • (tungsten) 0.8 mass% or less is preferable, as for the tungsten which the cast iron which concerns on one Embodiment of this invention contains, 0.7 mass% or less is more preferable, and 0.4 mass% or less is further more preferable.
  • the tungsten content exceeds 0.8 mass%, the hardness of the matrix structure becomes excessive, and carbides are formed between tungsten and carbon. As a result, the workability of the cast iron is reduced. If the total content of copper and tungsten is too high, the base structure is transformed into martensite or bainite. This also causes a decrease in the workability of the cast iron.
  • the tungsten contained in the cast iron according to an embodiment of the present invention is preferably 0.02% by mass or more, and more preferably 0.2% by mass or more.
  • the tungsten content is less than 0.02% by mass, the hardness of the cast iron matrix structure is lowered, and pearlite at high temperatures becomes unstable.
  • molybdenum and tungsten have a common effect of hardening the cast iron. Therefore, molybdenum and tungsten are mutually replaceable components.
  • the cast iron may contain (i) molybdenum and no tungsten, (ii) may contain tungsten without molybdenum, and (iii) may contain molybdenum and tungsten.
  • the cast iron according to one embodiment of the present invention contains inevitable impurities.
  • the unavoidable impurities can include the elements described below.
  • inevitable impurities are components derived from cast iron raw materials, facilities for producing cast iron, etc., and are not intentionally added, but mean components that are inevitably mixed in cast iron To do.
  • (Rin) 0.08 mass% or less is preferable and, as for the phosphorus which the cast iron which concerns on one Embodiment of this invention contains, 0.05 mass% or less is more preferable.
  • the strength of the cast iron can be maintained in a suitable range.
  • sulfur 0.2 mass% or less is preferable and, as for sulfur which the cast iron which concerns on one Embodiment of this invention contains, 0.15 mass% or less is more preferable.
  • sulfur content 0.2% by mass or less, high temperature cracking of the cast iron can be prevented in the casting solidification process.
  • nickel 0.05 mass% or less is preferable and, as for nickel which the cast iron which concerns on one Embodiment of this invention contains, 0.02 mass% or less is more preferable.
  • (aluminum) 0.05 mass% or less is preferable and, as for the aluminum which the cast iron which concerns on one Embodiment of this invention contains, 0.01 mass% or less is more preferable.
  • the aluminum content By setting the aluminum content to 0.05 mass% or less, the formation of pinholes that are casting defects can be suppressed.
  • titanium contained in the cast iron according to an embodiment of the present invention is preferably 0.05% by mass or less, and more preferably 0.01% by mass or less. By making the titanium content 0.05% by mass or less, it is possible to suppress a decrease in workability due to generation of titanium carbide.
  • the vanadium contained in the cast iron according to an embodiment of the present invention is preferably 0.01% by mass or less, and more preferably 0.005% by mass or less. By setting the vanadium content to 0.01% by mass or less, it is possible to suppress a decrease in workability due to the generation of vanadium carbide.
  • the cast iron according to one embodiment of the present invention preferably has a ⁇ value represented by the following formula (1) of 2.45 or less.
  • ⁇ value [Mn] + [Cr] + [Cu] + [Ni] + [Mo] + [W] (1) (In the formula, [] represents the content (mass%) of the element in parentheses).
  • the carbon equivalent represented by the following formula (2) is preferably 4.15 or less, and more preferably 4.1 or less. In the cast iron according to one embodiment of the present invention, the carbon equivalent represented by the following formula (2) is preferably 3.8 or more, and more preferably 3.9 or more. When the carbon equivalent is in the above range, it is possible to achieve both the wear resistance and the fluidity of the cast iron.
  • the cast iron base structure according to the embodiment of the present invention is not particularly limited.
  • pearlite is preferably the main base structure.
  • the cast iron may be heat-treated to transform the base structure into martensite and / or bainite. Such heat treatment may be performed only on a part of the cast iron. That is, the cast iron may have a different main base structure depending on the part.
  • the shape of graphite in the structure of cast iron according to an embodiment of the present invention is not particularly limited.
  • the shape of the graphite is preferably A-type graphite.
  • the cast iron casting method according to one embodiment of the present invention is not particularly limited. Below, an example of the casting method of the said cast iron is illustrated.
  • the same composition as the cast iron according to one embodiment of the present invention ie, C: 3.0 to 3.8% by mass, Si: 1.0 to 3.0% by mass, Mn: 0.6 to 1.0%) Mol%, Cr: more than 0 and 0.6 mass% or less, Mo: 0.01 to 0.4 mass%, Cu: 0.6 to 1.6 mass%, balance: Fe and inevitable impurities
  • the method for preparing the molten metal and the order of adding the various components to the molten metal are not particularly limited, and known methods can be used.
  • the composition of the molten metal is calculated from the ratio of the added raw material when the molten metal is prepared.
  • the prepared molten metal is cast into a mold.
  • either a gravity casting method or a centrifugal casting method may be employed.
  • a gravity casting method When manufacturing a cylinder block by casting, it is preferable to employ a gravity casting method.
  • the part that has been cast may be used as it is removed from the mold, or may be used after a part or all of the part is heat-treated.
  • the application of the cast iron according to one embodiment of the present invention is not particularly limited. Considering that the cast iron achieves both castability and high wear resistance, it is preferable to use the cast iron for the cylinder block. In particular, it is more preferable to use the cast iron for a member (that is, a cylinder head or the like) that is exposed to a high combustion pressure in the cylinder block.
  • Example 1 Cast iron pieces with different compositions were prepared and various physical properties were investigated.
  • a molten metal having the composition shown in Table 1 was prepared, and specimens made of the inventive materials 1 to 10, the comparative materials 1 to 5 and the FC material (all 4 cm long ⁇ 20 cm wide ⁇ 5 mm thick) by gravity casting. was cast. A furan mold was used as the mold.
  • the component composition of each material is a value measured by analyzing the material after casting by emission spectroscopic analysis.
  • FC flake graphite cast iron having a general level of wear resistance and castability is shown as an FC material.
  • Inventive materials 1 to 10 have the common feature that the Cu content is higher than that of the FC material.
  • Inventive materials 1 to 5 are mass%, C: 3.3 to 3.5%, Si: 1.7 to 2.3%, Mn: 0.7 to 0.8%, Cr: 0.2 to Cast iron made of 0.4%, Cu: 0.9 to 1.1%, Mo: 0.1 to 0.2% and / or W: 0.2 to 0.4%, balance: Fe and inevitable impurities It is. That is, it has a composition that is particularly suitable for achieving the object of one embodiment of the present invention.
  • Invention materials 6 to 10 are C: 3.0 to 3.8%, Si: 1.0 to 3.0%, Mn: 0.6 to 1.0%, Cr: more than 0 to 0.6%
  • the following is cast iron composed of Cu: 0.6 to 1.6%, Mo: 0.01 to 0.4% and / or W: 0.02 to 0.8%, balance: Fe and inevitable impurities. That is, the composition has a composition suitable for achieving the object of one embodiment of the present invention.
  • the comparative materials 1 to 5 have compositions out of the above range. Specifically, it is different from the inventive material in the following points, and as a result, defects in physical properties occurred.
  • Comparative material 1 has an excessive molybdenum content, so that the Brinell hardness is too high and the workability is low.
  • Comparative material 2 has a high molybdenum content, but the carbon equivalent is too large, so the tensile strength and elastic modulus are low.
  • the comparative material 3 has a large ⁇ value, the base structure is transformed, and the Brinell hardness is too large.
  • Comparative material 4 has a low carbon content and a low carbon equivalent, so the amount of graphite crystallization is insufficient and the Brinell hardness is too high.
  • Comparative material 5 does not contain molybdenum, and the tensile strength is out of the preferred range.
  • Test pieces 1 to 3 were arranged at intervals of 3 cm, and a groove through which the molten metal could flow was provided at one end of the test pieces 1 to 3.
  • Test pieces 1 to 3 were produced by the same method as the test pieces used for the measurement in 1-1 to 1-3, and the size was 4 cm long ⁇ 20 cm wide ⁇ 5 mm thick. Next, 1400 ° C. molten metal was poured into the groove.
  • the hot water run-off portion that occurred in Invention Materials 1 and 3 was approximately the same size as the hot run-out portion that occurred in the FC material ((a) and (b) of FIG. 2). For this reason, it can be said that the inventive materials 1 and 3 have a hot water flow property equivalent to that of the FC material, and thus have a casting property equivalent to that of the FC material.
  • the hot water poor portion generated in the inventive material 10 was slightly larger than the hot water poor portion generated in the FC material ((c) of FIG. 2). For this reason, it can be said that the inventive material 10 has a hot water flow property slightly inferior to that of the FC material, and therefore has a castability slightly inferior to that of the FC material.
  • the hot water runoff portion that occurred in the comparative material 5 was much larger than the hot runoff portion that occurred in the FC material ((d) in FIG. 2). For this reason, it can be said that the comparative material 5 has a molten metal flow property far inferior to that of the FC material, and therefore has castability far inferior to that of the FC material.
  • Inventive materials 1 and 3 have a pearlite base, whereas comparative material 3 has a high ⁇ value (particularly, an excessive Mo content), so that the base structure is transformed into bainite (FIG. 3). (C)). For this reason, it can be said that the hardness as a material becomes excessive and the workability is lowered.
  • Example 2 A wear test was performed using the inventive material 1 and the FC material.
  • inventive material 1 and the FC material were cast into a plate shape by the same method as in Example 1 (cylinder block material 4). Furthermore, a wear test was imposed under the conditions shown in Table 2 below using a metal piece (counter material 5) cut out from a piston ring material actually used as the counterpart material. A schematic diagram of the test is shown in FIG.
  • the test results are shown in FIG.
  • the wear amount of the inventive material 1 is reduced by 20% or more compared to the wear amount of the FC material. That is, the wear resistance of the inventive material 1 was much higher than that of the FC material.
  • the cast iron according to an embodiment of the present invention is suitable as, for example, a cylinder block material because it can sufficiently withstand abrasion due to sliding and can be cast into a complicated shape.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
PCT/JP2017/042680 2016-12-23 2017-11-28 鋳鉄、鋳鉄の製造方法およびシリンダーブロック WO2018116763A1 (ja)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114807735A (zh) * 2021-01-21 2022-07-29 中原内配集团股份有限公司 一种耐腐蚀贝氏体灰铸铁组合物、气缸套及制备方法
CN115094302A (zh) * 2022-06-16 2022-09-23 东风汽车零部件(集团)有限公司通用铸锻分公司 用于大型汽车覆盖件成形类模具的Mo-Cr-Cu系材料及其制备方法

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Publication number Priority date Publication date Assignee Title
JPS5542140B2 (enrdf_load_stackoverflow) * 1977-06-01 1980-10-29
JPS6428342A (en) * 1987-07-22 1989-01-30 Toyota Motor Corp Cast iron for cylinder block
JPH07216495A (ja) * 1994-01-28 1995-08-15 Hitachi Metals Ltd 耐熱亀裂性に優れるブレーキ部品およびその製造方法
JP2016079498A (ja) * 2014-10-16 2016-05-16 現代自動車株式会社Ｈｙｕｎｄａｉ Ｍｏｔｏｒ Ｃｏｍｐａｎｙ シリンダライナ用ねずみ鋳鉄及びそれを用いたシリンダライナの製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542140B2 (enrdf_load_stackoverflow) * 1977-06-01 1980-10-29
JPS6428342A (en) * 1987-07-22 1989-01-30 Toyota Motor Corp Cast iron for cylinder block
JPH07216495A (ja) * 1994-01-28 1995-08-15 Hitachi Metals Ltd 耐熱亀裂性に優れるブレーキ部品およびその製造方法
JP2016079498A (ja) * 2014-10-16 2016-05-16 現代自動車株式会社Ｈｙｕｎｄａｉ Ｍｏｔｏｒ Ｃｏｍｐａｎｙ シリンダライナ用ねずみ鋳鉄及びそれを用いたシリンダライナの製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114807735A (zh) * 2021-01-21 2022-07-29 中原内配集团股份有限公司 一种耐腐蚀贝氏体灰铸铁组合物、气缸套及制备方法
CN114807735B (zh) * 2021-01-21 2023-04-07 中原内配集团股份有限公司 一种耐腐蚀贝氏体灰铸铁组合物、气缸套及制备方法
CN115094302A (zh) * 2022-06-16 2022-09-23 东风汽车零部件(集团)有限公司通用铸锻分公司 用于大型汽车覆盖件成形类模具的Mo-Cr-Cu系材料及其制备方法
CN115094302B (zh) * 2022-06-16 2023-12-19 东风汽车零部件(集团)有限公司通用铸锻分公司 用于大型汽车覆盖件成形类模具的Mo-Cr-Cu系材料及其制备方法

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