CN111185591B - TiC high manganese steel composite material and preparation method thereof - Google Patents
TiC high manganese steel composite material and preparation method thereof Download PDFInfo
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- CN111185591B CN111185591B CN202010098407.8A CN202010098407A CN111185591B CN 111185591 B CN111185591 B CN 111185591B CN 202010098407 A CN202010098407 A CN 202010098407A CN 111185591 B CN111185591 B CN 111185591B
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- 229910000617 Mangalloy Inorganic materials 0.000 title claims abstract description 76
- 239000002131 composite material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 122
- 239000002994 raw material Substances 0.000 claims abstract description 39
- 238000005245 sintering Methods 0.000 claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000011230 binding agent Substances 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 12
- 239000012752 auxiliary agent Substances 0.000 claims description 8
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 7
- 239000012188 paraffin wax Substances 0.000 claims description 7
- 239000011572 manganese Substances 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000956 alloy Substances 0.000 description 12
- 229910045601 alloy Inorganic materials 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 6
- 238000001238 wet grinding Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000000498 ball milling Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0207—Using a mixture of prealloyed powders or a master alloy
- C22C33/0228—Using a mixture of prealloyed powders or a master alloy comprising other non-metallic compounds or more than 5% of graphite
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention relates to a TiC high manganese steel composite material and a preparation method thereof. The raw materials of the TiC high manganese steel composite material comprise a material A and a material B, wherein the mass ratio of the material A to the material B is 10-40: 60-90; the material A is prepared by sintering the following raw materials in mass ratio of 95-105: 7-10 of a powder material and a binder; the powder material comprises the following raw materials in percentage by mass: 70-95% of TiC and 5-30% of high manganese steel; the material B comprises the following raw materials in percentage by mass: 30-40% of TiC and 60-70% of high manganese steel. The TiC high manganese steel composite material has good strength, toughness and wear resistance under high impact.
Description
Technical Field
The invention relates to the field of powder metallurgy manufacturing, in particular to a TiC high manganese steel composite material and a preparation method thereof.
Background
The TiC high manganese steel composite material is a composite material formed between ceramic TiC and metal high manganese steel, and is conventionally called steel bonded hard alloy or steel bonded alloy. The hardness, wear resistance, strength and toughness of the material are between those of the traditional hard alloy and high-speed steel, so that the appearance of the material fills the gap between the hard alloy and the steel.
Compared with steel bonded hard alloy adopting WC as hard phase, the TiC-based steel bonded hard alloy has the following unique advantages: (1) the Ti resource is rich, the TiC preparation process is simple, and the cost is low; (2) in the sintering process, the growth tendency of crystal grains is small, and the crystal grains can generate plastic deformation under the high-temperature condition, so that the sintering material has excellent use performance; (3) the hardness of the TiC-based steel cemented hard alloy is obviously higher than that of the WC-based steel cemented hard alloy, the thermal stability is better, and the high-temperature oxidation resistance is good; (4) the carbon content can fluctuate in a large range and has flexibility in composition; (5) TiC density (4.90 g/cm)3) 1/3, WC only, provides significant advantages for wear parts used for high speed operation and wear parts used on vehicles and aircraft.
The TiC high manganese steel composite material is mainly applied to the industry through an insert casting process and an electric welding process, namely TiC high manganese steel bonded hard alloy is cast on a working surface of a wear-resistant component in an insert casting mode, and a small piece of TiC high manganese steel bonded hard alloy is welded on a steel component, so that the TiC high manganese steel bonded hard alloy is applied to the building material industry and the mining industry, such as a large crusher hammer and an engineering drill bit. However, the existing TiC high manganese steel bonded hard alloy still has the technical problems of insufficient strength and toughness and low wear resistance under high impact.
Disclosure of Invention
The inventor finds that when the impact is high, the traditional TiC high manganese steel composite material is broken due to insufficient toughness, so that the wear rate of the material is greatly accelerated. While increasing the amount of TiC increases wear resistance, both strength and toughness decrease.
Based on the above, one of the purposes of the invention is to provide a preparation method of a TiC high manganese steel composite material with good strength, good toughness and good wear resistance under high impact.
The specific technical scheme is as follows:
a TiC high manganese steel composite material comprises a material A and a material B, wherein the mass ratio of the material A to the material B is 10-40: 60-90;
wherein,
the material A is prepared by sintering the following raw materials in mass ratio of 100: 7-10 parts of powder material and binder; the powder material comprises the following raw materials in percentage by mass: 70-95% of TiC and 5-30% of high manganese steel;
the material B comprises the following raw materials in percentage by mass: 30-40% of TiC and 60-70% of high manganese steel.
The invention also aims to provide a preparation method of the TiC high manganese steel composite material, which comprises the following steps:
(1) preparation of material A: mixing the TiC, the high manganese steel and the binder in the raw material A, drying, granulating, pressing into blocks, sintering, crushing and sieving to obtain a material A;
(2) preparation of material B: mixing the TiC in the raw material of the material B with the high manganese steel to obtain a material B;
(3) mixing the obtained material A and the obtained material B with an auxiliary agent, drying, granulating, pressing, forming and sintering.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the particles of the material A with high TiC content are prepared, the particles are uniformly distributed in the material B to form a local area with high hardness and high wear resistance, and then the particles are matched with other components of the material B, so that the composite material has high hardness and wear resistance without reducing the strength and toughness, and the TiC high manganese steel composite material with excellent properties such as hardness, wear resistance, strength and toughness under high impact force is finally prepared.
In the preparation process of the material A, the invention selects a high-content binder as a pore-forming agent, and the porous sintered block is obtained by sintering at a proper temperature and for a proper time. The porous agglomerates are easily broken into particles, and the size of the particles can be controlled, so that the particles of the material A can be uniformly distributed in the material B.
Detailed Description
In order that the invention may be more readily understood, reference will now be made to the following more particular description of the invention, examples of which are set forth below. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A TiC high manganese steel composite material comprises a material A and a material B, wherein the mass ratio of the material A to the material B is 10-40: 60-90 parts of;
wherein,
the material A is prepared by sintering the following raw materials in mass ratio of 100: 7-10 of a powder material and a binder; the powder material comprises the following raw materials in percentage by mass: 70-95% of TiC and 5-30% of high manganese steel;
the material B comprises the following raw materials in percentage by mass: 30-40% of TiC and 60-70% of high manganese steel.
In some of these embodiments, the raw materials for the TiC high manganese steel composite further include an additive.
In some embodiments, in the raw materials of the material A and the material B, the high manganese steel comprises the following components in percentage by mass: 8-12% of Mn, 1-3% of Ni, 0.5-2% of Mo, 0.3-0.8% of C and 82.2-90.2% of Fe.
In some of the examples, the mass ratio of the material A to the material B is 15-30: 70-85.
In some embodiments, in the material a, the raw materials of the powder material comprise, by mass: 75-90% of TiC and 10-25% of high manganese steel.
In some embodiments, the raw materials of the material A comprise, by mass, TiC 78-82% and high manganese steel 18-22%.
In some embodiments, in the raw material a, the mass ratio of the powder material to the binder is 100: 8.
in some embodiments, the material B comprises the following raw materials in percentage by mass: 32-38% of TiC and 62-68% of high manganese steel.
In some of these embodiments, the binder is at least one of paraffin wax and rubber.
The preparation method of the TiC high manganese steel composite material comprises the following steps:
(1) preparation of material A: mixing the TiC, the high manganese steel and the binder in the raw material A, drying, granulating, pressing into blocks, sintering, crushing and sieving to obtain a material A;
(2) preparation of material B: mixing the TiC in the raw material of the material B with the high manganese steel to obtain a material B;
(3) mixing the obtained material A and the obtained material B with an auxiliary agent, drying, granulating, pressing, forming and sintering.
In some embodiments, in step (3), the auxiliary agent is selected from at least one of paraffin and rubber.
In some embodiments, the sintering time in step (1) is 0.5h to 1 h. Maintaining the sintering time within this range ensures alloying and proper porosity for subsequent fracture. Preferably, the sintering time in the step (1) is 40 min.
In some embodiments, the sintering time in step (3) is 1h to 3 h. Keeping the sintering time within this range ensures alloying, uniform structure, and sufficient densification. Preferably, the sintering time of the step (3) is 2 h.
In some embodiments, the mesh sieved in step (1) is 300-600 mesh. The mesh size kept in this range can provide excellent wear resistance and maintain the uniformity of the structure, and the combination of excellent strength and toughness. Preferably, the mesh sieved in the step (1) is 400 meshes.
In some embodiments, the sintering temperature in step (1) or step (3) is 1400-1440 ℃; and/or the vacuum degree of sintering in the step (1) or the step (3) is 20-50 Pa.
The present invention will be described in further detail with reference to specific examples.
Example 1
The TiC high manganese steel composite material provided by the embodiment comprises the following raw materials in parts by weight: 30 parts of material A, 70 parts of material B and 1 part of auxiliary rubber; wherein,
a material: powder material (TiC 75 wt% and high manganese steel 25 wt%) and binder rubber 7% of the total mass of the powder material. The high manganese steel comprises the following components: mn8 wt.%, Ni1 wt.%, mo0.5wt.%, c0.3wt.%, the remainder being Fe.
B, material B: TiC wt40 wt% and high manganese steel 60 wt%; the high manganese steel comprises Mn12 wt%, Ni3 wt%, Mo2 wt%, C0.8 wt%, and the balance of Fe;
the preparation method comprises the following steps:
(1) preparation of material A: adding a binder rubber into the powder material TiC and the high manganese steel, wet-grinding and uniformly mixing, drying and granulating, pressing into blocks, sintering for 0.5h at 1400 ℃ and 20Pa in a vacuum furnace, ball-milling and crushing after sintering, and sieving with a 300-mesh sieve to obtain a mixture A;
(2) preparation of material B: mixing the TiC and the high manganese steel in the raw material B to obtain a material B;
(3) adding the material A into the material B, adding the auxiliary agent rubber, wet-grinding and uniformly mixing, drying, granulating, pressing and forming, and sintering in a vacuum furnace at 1440 ℃ and 50Pa for 2h to obtain the TiC high manganese steel composite material.
Example 2
The TiC high manganese steel composite material provided by the embodiment comprises the following raw materials in parts by weight: 15 parts of material A, 85 parts of material B and 2 parts of auxiliary agent paraffin; wherein,
a material: powder material: 90 wt% of TiC and 10 wt% of high manganese steel; and 10% binder of the total mass of the powder material. The high manganese steel comprises the following components: 12 wt% of Mn, 3 wt% of Ni, 2 wt% of Mo, 0.8 wt% of C and the balance of Fe;
b, material B: 30 wt.% of TiC and 70 wt.% of high manganese steel; the high manganese steel comprises 8 wt% of Mn, 1 wt% of Ni, 0.5 wt% of Mo, 0.3 wt% of C and the balance of Fe;
the preparation method comprises the following steps:
(1) preparation of material A: adding a binder paraffin into the powder material TiC and the high manganese steel, wet-grinding and uniformly mixing, drying, granulating, pressing into blocks, sintering for 1h at the temperature of 1440 ℃ and the vacuum degree of 50Pa in a vacuum furnace, ball-milling, crushing and sieving by a 600-mesh sieve after sintering to obtain a mixture A;
(2) preparation of material B: mixing the TiC and the high manganese steel in the raw material of the material B to obtain a material B;
(3) adding the material A into the material B, adding the auxiliary agent paraffin wax, wet-milling and uniformly mixing, drying, granulating, pressing and forming, and sintering in a vacuum furnace at 1400 ℃ and 20Pa for 1h to obtain the TiC high manganese steel composite material.
Example 3
The TiC high manganese steel composite material described in this embodiment is prepared from the following raw materials in parts by weight: 25 parts of material A, 75 parts of material B and 1.5 parts of auxiliary rubber; wherein,
a material: powder material: 80 wt% of TiC and 20 wt% of high manganese steel; and 8% of binder by mass of the total powder material. The high manganese steel comprises 10 wt% of Mn, 2 wt% of Ni, 1 wt% of Mo, 0.6 wt% of C and the balance of Fe;
b, material B: 35 wt% of TiC and 75 wt% of high manganese steel; the high manganese steel comprises 11 wt% of Mn, 2 wt% of Ni, 1 wt% of Mo, 0.6 wt% of C and the balance of Fe;
the preparation method comprises the following steps:
(1) preparation of material A: adding a binder rubber into the powder material TiC and the high manganese steel, wet-grinding and uniformly mixing, drying and granulating, pressing into blocks, sintering for 40min at the temperature of 1420 ℃ and the vacuum degree of 40Pa in a vacuum furnace, ball-milling and crushing after sintering, and sieving with a 400-mesh sieve to obtain a mixture A;
(2) preparation of material B: mixing the TiC and the high manganese steel in the raw material of the material B to obtain a material B;
(3) adding the material A into the material B, adding the auxiliary agent rubber, wet-grinding and mixing uniformly, drying and granulating, then pressing and forming, and sintering in a vacuum furnace at the temperature of 1420 ℃ and the vacuum degree of 30Pa for 2h to obtain the TiC high manganese steel composite material.
Example 4
This example differs from example 3 in that step (1) is passed through a 200 mesh screen.
Example 5
This example differs from example 3 in that the sintering time in step (1) was 5 h.
Comparative example 1:
the difference between the comparative example and the example 3 is that the material A and the material B are not distinguished, all raw materials TiC, high manganese steel, a binder and the like are directly wet-milled and uniformly mixed, dried, granulated and then pressed to form, and sintered for 1.5 hours in a vacuum furnace at the temperature of 1420 ℃ and the vacuum degree of 30Pa to obtain the TiC high manganese steel composite material.
Comparative example 2:
the comparative example differs from example 3 in that the raw materials are used in the following amounts: 77 parts of material A, 25 parts of material B and 1.5 parts of auxiliary rubber. The material compositions and preparation methods of the specific materials A and B of this comparative example were the same as in example 3.
Comparative example 3
The material A prepared in example 3 is used as a TiC high manganese steel composite material.
And (3) performance testing:
the test method comprises the following steps: measuring the hardness of the composite material by using a Rockwell hardness tester; and measuring the toughness of the composite material by using an impact tester.
The results are shown in table 1:
TABLE 1 Properties of TiC high manganese Steel composites for the examples and comparative examples
| Hardness HRC | Impact toughness J/cm2 | |
| Example 1 | 60 | ＞6 |
| Example 2 | 62 | ＞6 |
| Example 3 | 65 | ＞6 |
| Example 4 | 63 | ＞6 |
| Example 5 | 62 | ＞6 |
| Comparative example 1 | 56 | ＜6 |
| Comparative example 2 | 55 | 5 |
| Comparative example 3 | 50 | 5 |
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The TiC high manganese steel composite material is characterized in that raw materials comprise a material A and a material B, and the mass ratio of the material A to the material B is 25-30: 70-75;
wherein,
the material A is prepared by sintering the following raw materials in mass ratio of 100: 7-10 of a powder material and a binder; the powder material comprises the following raw materials in percentage by mass: 70-95% of TiC and 5-30% of high manganese steel;
the material B comprises the following raw materials in percentage by mass: 30-40% of TiC and 60-70% of high manganese steel.
2. The TiC high manganese steel composite material of claim 1, wherein in the raw materials of the material A and the material B, the high manganese steel comprises the following components by mass percent: 8-12% of Mn, 1-3% of Ni, 0.5-2% of Mo, 0.3-0.8% of C and 82.2-90.2% of Fe.
3. The TiC high manganese steel composite material of claim 1, wherein in the raw material A, the raw material of the powder material comprises, by mass: 75-90% of TiC and 10-25% of high manganese steel.
4. The TiC high manganese steel composite material of claim 1, wherein in the raw material of the A material, the raw material mass percentage of the powder material is TiC 78-82%, high manganese steel 18-22%.
5. TiC high manganese steel composite according to any of claims 1 to 4, characterized in that said binder is at least one of paraffin and rubber.
6. The TiC high manganese steel composite material preparation method of any one of claims 1 to 5, characterized by comprising the steps of:
(1) preparation of material A: mixing the TiC, the high manganese steel and the binder in the raw material A, drying, granulating, pressing into blocks, sintering, crushing and sieving to obtain a material A;
(2) preparation of material B: mixing the TiC in the raw material of the material B with the high manganese steel to obtain a material B;
(3) mixing the obtained material A and the obtained material B with an auxiliary agent, drying, granulating, pressing, forming and sintering.
7. The production method according to claim 6, wherein in the step (3), the auxiliary is at least one selected from paraffin and rubber.
8. The method according to claim 6, wherein the sintering time in the step (1) is 0.5h to 1 h; the sintering time in the step (3) is 1-3 h.
9. The method as claimed in claim 6, wherein the mesh size in step (1) is 300-600 mesh.
10. The method according to any one of claims 6 to 9, wherein the sintering temperature in step (1) or step (3) is 1400-1440 ℃; the vacuum degree of sintering in the step (1) or the step (3) is 20-50 Pa.
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| CN101265531A (en) * | 2007-03-13 | 2008-09-17 | 四川理工学院 | Production method of cemented carbide with multiple groups of different components |
| CN102978499A (en) * | 2012-12-24 | 2013-03-20 | 株洲硬质合金集团有限公司 | High-temperature-resistant and wear-resistant hard alloy and preparation method thereof |
| CN103725945A (en) * | 2014-01-08 | 2014-04-16 | 北矿新材科技有限公司 | High hardness tungsten carbide base wear-resistant coating material and preparation method thereof |
| CN103769576A (en) * | 2014-01-08 | 2014-05-07 | 北矿新材科技有限公司 | Tungsten carbide-based wear-resistant coating material for preparing low-porosity coating and preparation method thereof |
| CN104195492A (en) * | 2014-09-02 | 2014-12-10 | 北京矿冶研究总院 | Wear-resistant and corrosion-resistant coating material and preparation method thereof, and coating and preparation method thereof |
| CN104195407A (en) * | 2014-09-23 | 2014-12-10 | 江苏汇诚机械制造有限公司 | Preparation method of TiC high-manganese steel based steel bond hard alloy |
| CN106282835A (en) * | 2016-08-30 | 2017-01-04 | 嘉禾县飞恒合金铸造有限公司 | The method of secondary alloyed preparation high rigidity high-strength tenacity ferrio wear-resistant material |
| CN107937789A (en) * | 2017-11-14 | 2018-04-20 | 史浩田 | A kind of manganese steel base steel bonded carbide and preparation method thereof |
| CN109811166A (en) * | 2017-11-20 | 2019-05-28 | 赵超峰 | A kind of manufacturing method of Himet material |
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