CN102329940A - Thermal treatment process for plunger of axial plunger pump - Google Patents
Thermal treatment process for plunger of axial plunger pump Download PDFInfo
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- CN102329940A CN102329940A CN201110269429A CN201110269429A CN102329940A CN 102329940 A CN102329940 A CN 102329940A CN 201110269429 A CN201110269429 A CN 201110269429A CN 201110269429 A CN201110269429 A CN 201110269429A CN 102329940 A CN102329940 A CN 102329940A
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Abstract
The invention provides a thermal treatment process for a plunger of an axial plunger pump, which is characterized by comprising the following steps of: (1) putting a semi-finished plunger into a vacuum furnace, and heating to 920-940 DEG C via 15-25 min; (2) preserving heat for 25-35 min; (3) cooling to 845-855 DEG C, discharging the plunger, and charging acetylene and nitrogen to the vacuum furnace while preserving heat and cooling to realize carbonitriding on the surface of the plunger; (4) quenching the plunger after discharging, subsequently tempering plunger at the temperature of 130-150 DEG C, and finally air-cooling the plunger to room temperature. In the invention, a hardened layer with high hardness and high wear resistance is formed on the surface of the plunger through carbonitriding on the surface of the plunger. Therefore, the invention has the advantages of wide plunger material selection, high thermal treatment speed, short time consumption and low thermal treatment cost.
Description
Technical field
The present invention relates to a kind of plunger thermal treatment process that is used for axial plunger pump (motor), belong to the manufacturing technology field of axial plunger pump (motor).
Background technology
Swash plate plunger pump (motor) has in engineering machinery more widely and uses because of advantages such as its pressure are high, rotating speed is high, volume is little and Variable Control is convenient.Plunger is the core part in the swash plate plunger pump (motor), because plunger both moved reciprocatingly in cylinder body, rotates with cylinder body again, so require plunger surface promptly wear-resisting, heart portion has good toughness again, and comprehensive mechanical performance requires high.
In order to realize that plunger promptly will wear-resistingly have good toughness again, adopted the heat treating method of nitriding, but the nitriding processing is applicable to the steel grade of alloying elements such as containing Cr, Mo, Al, W, V, Ti more, thereby has limited the scope of selection in the past.Simultaneously, the nitriding heat treatment time reaches more than 20 hour, and production cost is high.
Summary of the invention
The purpose of this invention is to provide a kind of and plunger thermal treatment process that production cost low unrestricted to the material steel grade.
In order to achieve the above object, technical scheme of the present invention has provided a kind of plunger thermal treatment process of axial plunger pump, it is characterized in that, step is:
Step 1, the work in-process plunger is put into vacuum oven, be warming up to 920-940 ℃ through 15-25 minute;
Step 2, insulation 25-35 minute;
Step 3, be cooled to 845-855 ℃ and come out of the stove,, realize that the carbonitriding on plunger top layer is handled heating up, in vacuum oven, charging into acetylene and nitrogen in the insulation, cooling;
Step 4, carry out quench treatment after coming out of the stove, carry out temper subsequently, the tempered temperature is 130-150 ℃, and is last air-cooled to room temperature.
Preferably, said nitrogen is for charge into continuously, and said acetylene is divided into 6 sections and charges into, and every section continues 3 minutes.
The present invention handles through carry out carbonitriding at plunger surface, forms the hardened layer that one deck has high firmness, high-wearing feature on the surface of plunger.Therefore, advantage of the present invention is: the plunger material type selecting is extensive, and thermal treatment rate is fast, and the time spent is short, and the thermal treatment cost is low.
Description of drawings
Fig. 1 is the process route chart among the embodiment 2.
Embodiment
For making the present invention more obviously understandable, now with preferred embodiment, and conjunction with figs. elaborates as follows.
Embodiment 1
The invention provides a kind of plunger thermal treatment process of axial plunger pump, step is:
Step 1, the work in-process plunger is put into vacuum oven, be warming up to 920 ℃ through 15 minutes;
Step 2, insulation 35 minutes;
Step 3, be cooled to 845 ℃ and come out of the stove,, realize that the carbonitriding on plunger top layer is handled heating up, in vacuum oven, charging into acetylene and nitrogen in the insulation, cooling; Nitrogen is used for nitrogenize, and for charging into continuously, acetylene is used for carburizing treatment; Be divided into 6 sections and charge into, every section continues 3 minutes;
Step 4, carry out quench treatment after coming out of the stove, carry out temper subsequently, the tempered temperature is 130 ℃, and is last air-cooled to room temperature.
Embodiment 2
The invention provides a kind of plunger thermal treatment process of axial plunger pump, step is:
Step 1, the work in-process plunger is put into vacuum oven, be warming up to 930 ℃ through 20 minutes;
Step 2, insulation 30 minutes;
Step 3, be cooled to 850 ℃ and come out of the stove, heating up, in vacuum oven, charging into acetylene and nitrogen in the insulation, cooling, realize that the carbonitriding on plunger top layer is handled, nitrogen is for charge into continuously, and acetylene is divided into 6 sections and charges into, every section lasting 3 minutes;
Step 4, carry out quench treatment after coming out of the stove, carry out temper subsequently, the tempered temperature is 140 ℃, and is last air-cooled to room temperature.
The operational path of above-mentioned steps is as shown in Figure 1.
Embodiment 3
The invention provides a kind of plunger thermal treatment process of axial plunger pump, step is:
Step 1, the work in-process plunger is put into vacuum oven, be warming up to 940 ℃ through 25 minutes;
Step 2, insulation 25 minutes;
Step 3, be cooled to 855 ℃ and come out of the stove, heating up, in vacuum oven, charging into acetylene and nitrogen in the insulation, cooling, realize that the carbonitriding on plunger top layer is handled, nitrogen is for charge into continuously, and said acetylene is divided into 6 sections and charges into, every section lasting 3 minutes;
Step 4, carry out quench treatment after coming out of the stove, carry out temper subsequently, the tempered temperature is 150 ℃, and is last air-cooled to room temperature.
Claims (2)
1. the plunger thermal treatment process of an axial plunger pump is characterized in that, step is:
Step 1, the work in-process plunger is put into vacuum oven, be warming up to 920-940 ℃ through 15-25 minute;
Step 2, insulation 25-35 minute;
Step 3, be cooled to 845-855 ℃ and come out of the stove,, realize that the carbonitriding on plunger top layer is handled heating up, in vacuum oven, charging into acetylene and nitrogen in the insulation, cooling;
Step 4, carry out quench treatment after coming out of the stove, carry out temper subsequently, the tempered temperature is 130-150 ℃, and is last air-cooled to room temperature.
2. the plunger thermal treatment process of a kind of axial plunger pump as claimed in claim 1, it is characterized in that: said nitrogen is for charge into continuously, and said acetylene is divided into 6 sections and charges into, and every section continues 3 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110269429A CN102329940A (en) | 2011-09-13 | 2011-09-13 | Thermal treatment process for plunger of axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110269429A CN102329940A (en) | 2011-09-13 | 2011-09-13 | Thermal treatment process for plunger of axial plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102329940A true CN102329940A (en) | 2012-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110269429A Pending CN102329940A (en) | 2011-09-13 | 2011-09-13 | Thermal treatment process for plunger of axial plunger pump |
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| CN (1) | CN102329940A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088349A (en) * | 2012-11-27 | 2013-05-08 | 龙工（上海）桥箱有限公司 | Heating processing technology for material of plunger of plunger pump |
| CN104712512A (en) * | 2013-12-16 | 2015-06-17 | 罗伯特·博世有限公司 | Cylinder Drum of Hydrostatic Axial Piston Machine having Wear-Resistant Layer |
| CN112828536A (en) * | 2020-12-29 | 2021-05-25 | 无锡鹰贝精密液压有限公司 | Method for machining plunger of hydraulic plunger pump |
| CN112941272A (en) * | 2021-01-28 | 2021-06-11 | 长江武汉航道工程局 | High-pressure oil pump plunger coupling piece with good dimensional stability and preparation method thereof |
-
2011
- 2011-09-13 CN CN201110269429A patent/CN102329940A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 朱元浦等: "《金属热处理问答》", 30 November 1993 * |
| 李香琪: "《轮机工程材料》", 30 May 2010 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088349A (en) * | 2012-11-27 | 2013-05-08 | 龙工（上海）桥箱有限公司 | Heating processing technology for material of plunger of plunger pump |
| CN104712512A (en) * | 2013-12-16 | 2015-06-17 | 罗伯特·博世有限公司 | Cylinder Drum of Hydrostatic Axial Piston Machine having Wear-Resistant Layer |
| CN104712512B (en) * | 2013-12-16 | 2020-05-15 | 罗伯特·博世有限公司 | Cylinder for a hydrostatic axial piston machine with a wear protection layer |
| CN112828536A (en) * | 2020-12-29 | 2021-05-25 | 无锡鹰贝精密液压有限公司 | Method for machining plunger of hydraulic plunger pump |
| CN112828536B (en) * | 2020-12-29 | 2022-04-29 | 无锡鹰贝精密液压有限公司 | Method for machining plunger of hydraulic plunger pump |
| CN112941272A (en) * | 2021-01-28 | 2021-06-11 | 长江武汉航道工程局 | High-pressure oil pump plunger coupling piece with good dimensional stability and preparation method thereof |
| CN112941272B (en) * | 2021-01-28 | 2022-07-29 | 长江武汉航道工程局 | High-pressure oil pump plunger coupling piece with good dimensional stability and preparation method thereof |
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Application publication date: 20120125 |