CN110983167A - Wear-resistant bearing material and preparation method thereof - Google Patents
Wear-resistant bearing material and preparation method thereof Download PDFInfo
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- CN110983167A CN110983167A CN201911311772.6A CN201911311772A CN110983167A CN 110983167 A CN110983167 A CN 110983167A CN 201911311772 A CN201911311772 A CN 201911311772A CN 110983167 A CN110983167 A CN 110983167A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
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- 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
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a wear-resistant bearing material which comprises the following components in parts by mass: 3.2 to 4.8 percent of carbon, 0.2 to 0.35 percent of manganese, 16 to 20 percent of chromium, 2.6 to 3.2 percent of copper-plated graphite powder, 1.46.6 to 2.36 percent of nickel, 1.6 to 7.2 percent of copper, 0.3 to 0.8 percent of tin and the balance of iron, wherein the sum of the percentages of the components is 100 percent; the invention also discloses a preparation method of the wear-resistant bearing material. According to the wear-resistant bearing material, the copper-plated graphite powder is adopted, so that the problem of poor wear resistance caused by alloy can be effectively solved; the preparation method adopts effective primary sintering and secondary sintering technologies, can enhance the collective density of the materials, is more wear-resistant, and has simple and practical steps and good practical value.
Description
Technical Field
The invention belongs to the technical field of bearing materials and preparation methods thereof, and particularly relates to a wear-resistant bearing material and a preparation method thereof.
Background
The bearing is an important part in mechanical equipment, and has the main functions of supporting a mechanical rotating body, reducing the friction coefficient in the movement process of the mechanical rotating body and ensuring the rotation precision of the mechanical rotating body.
The existing bearing is generally made of bearing steel, and the bearing steel has the following characteristics: in order to improve the service life of the bearing, the bearing steel must have high contact fatigue strength; in order to increase the abrasion of bearing parts, maintain the precision stability of the bearing and extend the service life, the bearing steel has good abrasion resistance; the hardness of the bearing steel under the application condition respectively reaches HRC 61-65, so that the bearing can obtain higher contact fatigue strength and wear resistance; in order to avoid corrosion and rust of bearing parts and finished products in the processes of machining, depositing and using, the bearing steel is required to have good rust-proof performance; in addition to the basic requirements, the bearing steel also can meet the requirements of average external structure, less non-metal dopant, conformity of external appearance defects and no exceeding of regular concentration of an external decarburized layer.
However, the existing bearing steel generally has poor wear resistance in the using process, and the service life and the processing performance of the bearing are affected.
Disclosure of Invention
The invention aims to provide a wear-resistant bearing material, which solves the problem of poor wear resistance of the existing bearing steel material.
The invention also provides a preparation method of the wear-resistant bearing material.
The technical scheme adopted by the invention is that the wear-resistant bearing material comprises the following components in percentage by mass: 3.2 to 4.8 percent of carbon, 0.2 to 0.35 percent of manganese, 16 to 20 percent of chromium, 2.6 to 3.2 percent of copper-plated graphite powder, 1.46 to 2.36 percent of nickel, 1.6 to 7.2 percent of copper, 0.3 to 0.8 percent of tin and the balance of iron, wherein the sum of the percentages of the components is 100 percent.
The invention adopts another technical scheme that the preparation method of the wear-resistant bearing material comprises the following steps:
step 1, weighing raw materials according to mass fraction, wherein the raw materials comprise the following components: 3.2 to 4.8 percent of carbon, 0.2 to 0.35 percent of manganese, 16 to 20 percent of chromium, 2.6 to 3.2 percent of copper-plated graphite powder, 1.46 to 2.36 percent of nickel, 1.6 to 7.2 percent of copper, 0.3 to 0.8 percent of copper and the balance of iron, wherein the sum of the percentages of the components is 100 percent;
step 2, putting the carbon, the manganese, the chromium, the copper-plated graphite powder and the iron in the step 1 into a mixer, stirring for 30-40 min, and uniformly stirring;
step 3, sequentially putting copper-plated graphite powder, nickel, copper and copper into the mixer processed in the step 2, and uniformly stirring again;
step 4, sintering the raw materials in the mixer processed in the step 3 to obtain a prefabricated product;
and 5, re-burning the prefabricated product in the step 2, preserving heat, and then cooling in air to normal temperature to obtain the required material.
The present invention is also characterized in that,
the parameters of raw material sintering in the step 4 are as follows: the sintering temperature is 560-780 ℃ and the time is 60-80 min.
The parameters of the re-sintering in the step 5 are as follows: the re-sintering temperature is 800-980 ℃ and the time is 60-80 min.
In the step 5, the temperature rise rate of the re-burning is 5-8 ℃.
The invention has the beneficial effects that: according to the wear-resistant bearing material, the copper-plated graphite powder is adopted, so that the problem of poor wear resistance caused by alloy can be effectively solved; the preparation method adopts effective primary sintering and secondary sintering technologies, can enhance the collective density of the materials, is more wear-resistant, and has simple and practical steps and good practical value.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments.
The invention relates to a wear-resistant bearing material which comprises the following components in parts by mass: 3.2 to 4.8 percent of carbon, 0.2 to 0.35 percent of manganese, 16 to 20 percent of chromium, 2.6 to 3.2 percent of copper-plated graphite powder, 1.46 to 2.36 percent of nickel, 1.6 to 7.2 percent of copper, 0.3 to 0.8 percent of tin and the balance of iron, wherein the sum of the percentages of the components is 100 percent.
The copper-plated graphite powder increases the lubricating property of the bearing and slows down the wear of the bearing in the use process.
Example 1
Step 1, weighing raw materials according to mass fraction, wherein the raw materials comprise the following components: 3.2 percent of carbon, 0.2 percent of manganese, 16 percent of chromium, 2.6 percent of copper-plated graphite powder, 1.46 percent of nickel, 1.6 percent of copper, 0.3 percent of copper and the balance of iron, wherein the sum of the percentages of the components is 100 percent;
step 2, putting the carbon, the manganese, the chromium, the copper-plated graphite powder and the iron in the step 1 into a mixer, stirring for 30min, and uniformly stirring;
step 3, sequentially putting copper-plated graphite powder, nickel, copper and copper into the mixer processed in the step 2, and uniformly stirring again;
step 4, sintering the raw materials in the mixer processed in the step 3 to obtain a prefabricated product;
the parameters of raw material sintering are as follows: the sintering temperature is 560 ℃, and the time is 80 min.
Step 5, re-burning the prefabricated product in the step 2, preserving heat, and then air-cooling to normal temperature to obtain the required material; the parameters of the reburning are as follows: re-sintering at 800 deg.c for 80 min; the rate of temperature rise was 5 ℃.
Example 2
Step 1, weighing raw materials according to mass fraction, wherein the raw materials comprise the following components: 4.8 percent of carbon, 0.35 percent of manganese, 20 percent of chromium, 3.2 percent of copper-plated graphite powder, 2.36 percent of nickel, 7.2 percent of copper, 0.8 percent of copper and the balance of iron, wherein the sum of the percentages of the components is 100 percent;
step 2, putting the carbon, the manganese, the chromium, the copper-plated graphite powder and the iron in the step 1 into a mixer, stirring for 40min, and uniformly stirring;
step 3, sequentially putting copper-plated graphite powder, nickel, copper and copper into the mixer processed in the step 2, and uniformly stirring again;
step 4, sintering the raw materials in the mixer processed in the step 3 to obtain a prefabricated product;
the parameters of raw material sintering are as follows: the sintering temperature is 780 ℃ and the time is 60 min.
Step 5, re-burning the prefabricated product in the step 2, preserving heat, and then air-cooling to normal temperature to obtain the required material; the parameters of the reburning are as follows: the re-sintering temperature is 980 ℃ and the time is 60 min; the rate of temperature rise was 5 ℃.
Example 3
Step 1, weighing raw materials according to mass fraction, wherein the raw materials comprise the following components: 4.2 percent of carbon, 0.28 percent of manganese, 17.4 percent of chromium, 2.9 percent of copper-plated graphite powder, 2.2 percent of nickel, 6 percent of copper, 0.5 percent of copper and the balance of iron, wherein the sum of the percentages of the components is 100 percent;
step 2, putting the carbon, the manganese, the chromium, the copper-plated graphite powder and the iron in the step 1 into a mixer, stirring for 35min, and uniformly stirring;
step 3, sequentially putting copper-plated graphite powder, nickel, copper and copper into the mixer processed in the step 2, and uniformly stirring again;
step 4, sintering the raw materials in the mixer processed in the step 3 to obtain a prefabricated product;
the parameters of raw material sintering are as follows: the sintering temperature is 600 ℃ and the sintering time is 70 min.
Step 5, re-burning the prefabricated product in the step 2, preserving heat, and then air-cooling to normal temperature to obtain the required material; the parameters of the reburning are as follows: re-sintering at 860 deg.C for 70 min; the rate of temperature rise was 6 ℃.
The wear-resistant bearing material prepared in the embodiment 1-3 adopts copper-plated graphite powder, so that the problem of poor wear resistance caused by alloy can be effectively solved; the preparation method adopts effective primary sintering and secondary sintering technologies, can enhance the collective density of the materials, is more wear-resistant, and has simple and practical steps and good practical value.
Claims (5)
1. A wear-resistant bearing material is characterized by comprising the following components in percentage by mass: 3.2 to 4.8 percent of carbon, 0.2 to 0.35 percent of manganese, 16 to 20 percent of chromium, 2.6 to 3.2 percent of copper-plated graphite powder, 1.46.6 to 2.36 percent of nickel, 1.6 to 7.2 percent of copper, 0.3 to 0.8 percent of tin and the balance of iron, wherein the sum of the percentages of the components is 100 percent.
2. The method of preparing a wear resistant bearing material of claim 1 comprising the steps of:
step 1, weighing raw materials according to mass fraction, wherein the raw materials comprise the following components: 3.2 to 4.8 percent of carbon, 0.2 to 0.35 percent of manganese, 16 to 20 percent of chromium, 2.6 to 3.2 percent of copper-plated graphite powder, 1.46.6 to 2.36 percent of nickel, 1.6 to 7.2 percent of copper, 0.3 to 0.8 percent of copper and the balance of iron, wherein the sum of the percentages of the components is 100 percent;
step 2, putting the carbon, the manganese, the chromium, the copper-plated graphite powder and the iron in the step 1 into a mixer, stirring for 30-40 min, and uniformly stirring;
step 3, sequentially putting copper-plated graphite powder, nickel, copper and copper into the mixer processed in the step 2, and uniformly stirring again;
step 4, sintering the raw materials in the mixer processed in the step 3 to obtain a prefabricated product;
and 5, re-burning the prefabricated product in the step 2, preserving heat, and then cooling in air to normal temperature to obtain the required material.
3. The method for preparing a wear-resistant bearing material as claimed in claim 2, wherein the parameters of the raw material sintering in the step 4 are as follows: the sintering temperature is 560-780 ℃ and the time is 60-80 min.
4. The method for preparing a wear-resistant bearing material as claimed in claim 2, wherein the parameters of the re-sintering in the step 5 are as follows: the re-sintering temperature is 800-980 ℃ and the time is 60-80 min.
5. The method of claim 2, wherein the re-firing in step 5 is performed at a temperature increase rate of 5 to 8 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911311772.6A CN110983167A (en) | 2019-12-18 | 2019-12-18 | Wear-resistant bearing material and preparation method thereof |
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| CN201911311772.6A CN110983167A (en) | 2019-12-18 | 2019-12-18 | Wear-resistant bearing material and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1769508A (en) * | 2005-11-10 | 2006-05-10 | 西安交通大学 | Low cost, high-wearability hypereutectic high chromium cast iron and its production method |
| CN101871058A (en) * | 2010-06-17 | 2010-10-27 | 大连宏润复合轴承有限公司 | Metal-based self-lubricating composite material and preparation method thereof |
| CN102453827A (en) * | 2010-10-28 | 2012-05-16 | 刘芳 | Preparation method of powdered metallurgic iron-based material |
-
2019
- 2019-12-18 CN CN201911311772.6A patent/CN110983167A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1769508A (en) * | 2005-11-10 | 2006-05-10 | 西安交通大学 | Low cost, high-wearability hypereutectic high chromium cast iron and its production method |
| CN101871058A (en) * | 2010-06-17 | 2010-10-27 | 大连宏润复合轴承有限公司 | Metal-based self-lubricating composite material and preparation method thereof |
| CN102453827A (en) * | 2010-10-28 | 2012-05-16 | 刘芳 | Preparation method of powdered metallurgic iron-based material |
Non-Patent Citations (1)
| Title |
|---|
| 陆文华: "《铸铁及其熔炼》", 30 April 1981, 机械工业出版社 * |
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