CN111250714A - Method and tool for cladding nickel-based alloy in inner hole of thin-wall small-caliber pipe - Google Patents
Method and tool for cladding nickel-based alloy in inner hole of thin-wall small-caliber pipe Download PDFInfo
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- CN111250714A CN111250714A CN202010045085.0A CN202010045085A CN111250714A CN 111250714 A CN111250714 A CN 111250714A CN 202010045085 A CN202010045085 A CN 202010045085A CN 111250714 A CN111250714 A CN 111250714A
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- temperature
- sliding bearing
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- shaft sleeve
- inner shaft
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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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
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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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention relates to a method and a tool for cladding nickel-based alloy in an inner hole of a thin-wall small-caliber pipe, belonging to the technical field of high-temperature valves, wherein one end of a sliding bearing is coaxially and fixedly provided with a fixing ring, an inner shaft sleeve is coaxially and fixedly arranged in the fixing ring, the inner shaft sleeve, the fixing ring and the sliding bearing are enclosed into an annular cavity with one open end, nickel-based powder is directly filled in the annular cavity, the powder utilization rate reaches 100 percent, the tool is made of carbon steel, the cost is saved on the raw material, and the processing aspect is as: the middle drilling sequence is reduced, the excircle can be processed by adopting a stainless steel material roughness lathe, the grinding processing is not needed, and the processing period is greatly shortened.
Description
Technical Field
The invention relates to the technical field of high-temperature valves, in particular to a method and a tool for cladding a nickel-based alloy in an inner hole of a thin-wall small-caliber pipe.
Background
The high-temperature valve is harsh in use working condition, and has high requirements on materials and high roughness of a matching surface. The sliding bearing on the high-temperature valve is a small-caliber thin-walled tube, the excircle of the sliding bearing is matched and sealed with the valve body, the inner hole of the sliding bearing directly rubs with the valve rod, and the inner hole is made of a wear-resistant material and has high corrosion resistance and oxidation resistance. The sliding bearing on the high-temperature valve is usually processed by a high-nickel cast iron cast rod. The high-nickel cast iron casting rod has higher processing difficulty and higher cost. The roughness of the surface of the workpiece can only be used through grinding, so that the processing period is longer, and the production efficiency is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problem that the surface roughness of an inner hole of a sliding bearing on a high-temperature valve is processed by grinding and the processing period is long, a method and a tool for cladding a nickel-based alloy on the inner hole of a thin-wall small-caliber pipe are provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a thin wall small-bore pipe hole melts and covers nickel base alloy frock, includes slide bearing, the coaxial fixed mounting in one end of slide bearing has solid fixed ring, the coaxial fixed mounting in the fixed ring has interior axle sleeve, solid fixed ring and slide bearing enclose synthetic one end open-ended annular cavity.
In order to fill nickel-based alloy powder into the annular cavity, the nickel-based alloy powder is prevented from entering the inner shaft sleeve, and one end, far away from the fixing ring, of the inner shaft sleeve extends out of the sliding bearing.
A method for cladding nickel-based alloy on an inner hole of a thin-wall small-caliber pipe comprises the following steps: 1) cleaning the sliding bearing and then carrying out sand blasting on the inner circumferential surface of the sliding bearing;
2) a fixing ring is coaxially and fixedly installed in one end of the sliding bearing, an inner shaft sleeve is coaxially and fixedly installed in the fixing ring, the inner shaft sleeve, the fixing ring and the sliding bearing are enclosed to form an annular chamber with one open end, and nickel-based alloy powder is filled into the annular chamber;
3) and putting the tool finished in the step 2 into a vacuum furnace for sintering, wherein the sintering process is as follows:
a. after the tool is placed in a vacuum furnace, vacuumizing the vacuum sintering furnace to enable the vacuum degree to reach below 10Pa, and heating;
b. heating in the first stage: raising the temperature in the vacuum furnace to 550 ℃, wherein the temperature raising time is 1h and 40min, and the temperature is not preserved;
c. heating in the second stage to raise the temperature in the vacuum furnace to 950 ℃, wherein the temperature is raised for 1h, and the temperature is kept for 10-15 min;
d. heating in the third stage: raising the temperature in the vacuum furnace to 1080 ℃, wherein the temperature raising time is 40min, and the temperature is kept for 12-18 min;
e. after the heat preservation is finished, cooling the furnace to 800-;
4) and after the air cooling is finished, removing the inner shaft sleeve and machining the sliding bearing.
The invention has the beneficial effects that: according to the method and the tool for cladding the nickel-based alloy in the inner hole of the thin-wall small-caliber pipe, the inner shaft sleeve, the fixing ring and the sliding bearing are enclosed to form the annular cavity with one open end, the nickel-based powder is directly filled in the annular cavity, the powder utilization rate reaches 100%, the tool is made of carbon steel, and the cost is saved on raw materials; from the aspect of processing: the middle drilling sequence is reduced, the excircle can be processed by adopting a stainless steel material roughness lathe, the grinding processing is not needed, and the processing period is greatly shortened.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a two-dimensional cross-sectional view of the present invention.
In the figure: 1. sliding bearing, 2, fixed ring, 3, inner shaft sleeve, 4, annular chamber.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1, the thin-wall small-caliber pipe inner hole cladding nickel-based alloy tool comprises a sliding bearing 1, a fixing ring 2 is coaxially and fixedly installed at one end of the sliding bearing 1, an inner shaft sleeve 3 is coaxially and fixedly installed in the fixing ring 2, one end, far away from the fixing ring 2, of the inner shaft sleeve 3 extends out of the sliding bearing 1, and an annular chamber 4 with one open end is enclosed by the inner shaft sleeve 3, the fixing ring 2 and the sliding bearing 1.
A method for cladding nickel-based alloy on an inner hole of a thin-wall small-caliber pipe comprises the following steps: 1) cleaning the sliding bearing 1 and then carrying out sand blasting on the inner circumferential surface of the sliding bearing 1;
2) a fixing ring 2 is coaxially and fixedly installed in one end of a sliding bearing 1, an inner shaft sleeve 3 is coaxially and fixedly installed in the fixing ring 2, the inner shaft sleeve 3, the fixing ring 2 and the sliding bearing 1 are enclosed to form an annular chamber 4 with one open end, and nickel-based alloy powder is filled into the annular chamber 4; the fixing ring in the step can be fixedly installed in the sliding bearing through welding, and can also be integrally manufactured with the sliding bearing; the inner shaft sleeve in the step can be fixedly arranged in the fixed ring by welding; before processing, a layer of high-temperature-resistant release agent can be uniformly coated on the outer circumferential surface of the inner shaft sleeve, and then the inner shaft sleeve is arranged in the fixed ring in an interference manner;
3) and putting the tool finished in the step 2 into a vacuum furnace for sintering, wherein the sintering process is as follows:
a. after the tool is placed in a vacuum furnace, vacuumizing the vacuum sintering furnace by using a vacuum pump to ensure that the vacuum degree reaches below 10Pa for heating;
b. heating in the first stage: raising the temperature in the vacuum furnace to 550 ℃, wherein the temperature raising time is 1h and 40min, and the temperature is not preserved;
c. heating in the second stage: raising the temperature in the vacuum furnace to 950 ℃, wherein the temperature rise time is 1h, and the temperature is kept for 10-15 min;
d. heating in the third stage: raising the temperature in the vacuum furnace to 1080 ℃, wherein the temperature raising time is 40min, and the temperature is kept for 12-18 min;
e. after the heat preservation is finished, cooling the furnace to 800-;
4) after air cooling is finished, removing the inner shaft sleeve, and machining the sliding bearing, wherein in the step, if the inner shaft sleeve is fixedly installed in the fixed ring through welding, the inner shaft sleeve can be turned and removed through a turning process; if the inner sleeve is arranged in the fixed ring in an interference mode, the inner sleeve can be ejected out by using a jack, and the release agent provides a lubricating effect.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. The utility model provides a thin wall small-bore pipe hole melts and covers nickel base alloy frock which characterized in that: including slide bearing (1), the coaxial fixed mounting in one end of slide bearing (1) has solid fixed ring (2), gu fixed ring (2) interior coaxial fixed mounting has interior axle sleeve (3), gu fixed ring (2) and slide bearing (1) enclose synthetic one end open-ended annular chamber (4).
2. The tool for cladding nickel-based alloy on the inner hole of the thin-wall small-caliber pipe, disclosed by claim 1, is characterized in that: and one end of the inner shaft sleeve (3) far away from the fixed ring (2) extends out of the sliding bearing (1).
3. A method for cladding nickel-based alloy in an inner hole of a thin-wall small-caliber pipe is characterized by comprising the following steps: the method comprises the following steps: 1) cleaning the sliding bearing (1) and then carrying out sand blasting on the inner circumferential surface of the sliding bearing (1);
2) a fixing ring (2) is coaxially and fixedly installed in one end of the sliding bearing (1), an inner shaft sleeve (3) is coaxially and fixedly installed in the fixing ring (2), the inner shaft sleeve (3), the fixing ring (2) and the sliding bearing (1) are enclosed to form an annular chamber (4) with one open end, and nickel-based alloy powder is filled into the annular chamber (4);
3) and putting the tool finished in the step 2 into a vacuum furnace for sintering, wherein the sintering process is as follows:
a. after the tool is placed in a vacuum furnace, vacuumizing the vacuum sintering furnace to enable the vacuum degree to reach below 10Pa, and heating;
b. heating in the first stage: raising the temperature in the vacuum furnace to 550 ℃, wherein the temperature raising time is 1h40min, and the temperature is not preserved;
c. heating in the second stage to raise the temperature in the vacuum furnace to 950 ℃, wherein the temperature is raised for 1h, and the temperature is kept for 10-15 min;
d. heating in the third stage: raising the temperature in the vacuum furnace to 1080 ℃, wherein the temperature raising time is 40min, and the temperature is kept for 12-18 min;
e. after the heat preservation is finished, cooling the furnace to 800-;
4) and after the air cooling is finished, removing the inner shaft sleeve and machining the sliding bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010045085.0A CN111250714A (en) | 2020-01-16 | 2020-01-16 | Method and tool for cladding nickel-based alloy in inner hole of thin-wall small-caliber pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010045085.0A CN111250714A (en) | 2020-01-16 | 2020-01-16 | Method and tool for cladding nickel-based alloy in inner hole of thin-wall small-caliber pipe |
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| Publication Number | Publication Date |
|---|---|
| CN111250714A true CN111250714A (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010045085.0A Pending CN111250714A (en) | 2020-01-16 | 2020-01-16 | Method and tool for cladding nickel-based alloy in inner hole of thin-wall small-caliber pipe |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310080A (en) * | 2001-03-15 | 2001-08-29 | 西北稀有金属材料研究院 | Ceramic composite cylinder sleeve and cold and hot isostatic pressing method manufacturing process thereof |
| KR100789994B1 (en) * | 2006-07-20 | 2008-01-02 | 주식회사 에스.오.비 | Bush type sliding bearing comprising of sintered segments with sloped joining surface |
| KR20110118283A (en) * | 2010-04-23 | 2011-10-31 | 주식회사 에스지오 | Non oil supplying and antirust sinterred bearing |
| CN102601583A (en) * | 2012-03-15 | 2012-07-25 | 胡长安 | Near-net forming manufacturing method of sliding bearing dual-metal thrust sleeve and mold thereof |
| CN106694889A (en) * | 2017-01-17 | 2017-05-24 | 苏州艾盾合金材料有限公司 | Inner liner with composite alloy layer and preparation method of inner liner |
| CN106944612A (en) * | 2017-05-22 | 2017-07-14 | 广东博杰特新材料科技有限公司 | Bimetallic pipe sleeve vacuum-sintering moulding process and its product |
| CN107559307A (en) * | 2016-06-30 | 2018-01-09 | 祥莹有限公司 | Double-layer sliding bearing |
| CN109290580A (en) * | 2018-11-07 | 2019-02-01 | 北京航空航天大学 | A kind of nickel base superalloy annular element method in conjunction with the solid powder of copper zinc-aluminium powder |
-
2020
- 2020-01-16 CN CN202010045085.0A patent/CN111250714A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310080A (en) * | 2001-03-15 | 2001-08-29 | 西北稀有金属材料研究院 | Ceramic composite cylinder sleeve and cold and hot isostatic pressing method manufacturing process thereof |
| KR100789994B1 (en) * | 2006-07-20 | 2008-01-02 | 주식회사 에스.오.비 | Bush type sliding bearing comprising of sintered segments with sloped joining surface |
| KR20110118283A (en) * | 2010-04-23 | 2011-10-31 | 주식회사 에스지오 | Non oil supplying and antirust sinterred bearing |
| CN102601583A (en) * | 2012-03-15 | 2012-07-25 | 胡长安 | Near-net forming manufacturing method of sliding bearing dual-metal thrust sleeve and mold thereof |
| CN107559307A (en) * | 2016-06-30 | 2018-01-09 | 祥莹有限公司 | Double-layer sliding bearing |
| CN106694889A (en) * | 2017-01-17 | 2017-05-24 | 苏州艾盾合金材料有限公司 | Inner liner with composite alloy layer and preparation method of inner liner |
| CN106944612A (en) * | 2017-05-22 | 2017-07-14 | 广东博杰特新材料科技有限公司 | Bimetallic pipe sleeve vacuum-sintering moulding process and its product |
| CN109290580A (en) * | 2018-11-07 | 2019-02-01 | 北京航空航天大学 | A kind of nickel base superalloy annular element method in conjunction with the solid powder of copper zinc-aluminium powder |
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Application publication date: 20200609 |
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