CN103352106A - Surface-hardening treatment method for inner wall of low-carbon steel long cylinder - Google Patents
Surface-hardening treatment method for inner wall of low-carbon steel long cylinder Download PDFInfo
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- CN103352106A CN103352106A CN2013102660800A CN201310266080A CN103352106A CN 103352106 A CN103352106 A CN 103352106A CN 2013102660800 A CN2013102660800 A CN 2013102660800A CN 201310266080 A CN201310266080 A CN 201310266080A CN 103352106 A CN103352106 A CN 103352106A
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Abstract
The invention discloses a surface-hardening treatment method for the inner wall of a low-carbon steel long cylinder. The method comprises the following steps of: firstly, performing carburization or carbonitriding treatment on the inner wall of the low-carbon steel long cylinder; secondly, grinding the inner wall of the long cylinder; and finally, performing heat treatment on the inner wall of the long cylinder by using a plasma quench hardening method so that the surface of the inner wall is hardened. The surface-hardening treatment method is applicable to hardening treatment of the inner wall surface of the long cylinder made of low-carbon steel and is also applicable to low-carbon alloy steel, medium-carbon steel and medium-carbon alloy steel; and the hardness of the inner wall surface of an oil pump cylinder made of a 20# steel tube is higher than HV900.
Description
Technical field
The present invention relates to a kind of heat treating method, relate in particular to a kind of inner wall surface plasma quenching hardening process to soft steel steel long cylinder.
Background technology
Contain sand in the oil extraction in oil field, contain alkali, acid content is larger, polymkeric substance is more, Chemical Composition is complicated, and oil well pump is caused abrasion and corrosion, and shortened its work-ing life.Domestic used oil well pump has three kinds at present:
One, the structural alloy steel surface is through heat treated sundstrand pump (hereinafter to be referred as sundstrand pump); Two, the structural carbon steel surface is through heat treated whole cylinder carburizing pump (hereinafter to be referred as the carburizing pump); Three, the whole barrel plating chromium pump (hereinafter to be referred as the chromium plating pump) of structural carbon steel plating inner surface.
The sundstrand pump hexyl originally is eliminated at present, because of its processed complex, take 0.3 meter cylinder sleeve of every joint as main, is assembled into the long oil well pump of 3-12 rice (outer sleeve is long equally), disorderly position phenomenon easily occurs, expends steel, when taking a lot of work again; What corner the market now is carburizing pump, chromium plating pump, yet the carburizing pump is take structural carbon steel (20# steel) as main.This material is anticorrosive, and wear resisting property is low; And its chromium layer of chromium plating pump is 0.07-0.12mm, employing be the method for plating inner surface, very easily scratched by sand, work-ing life is short, easily causes the holddown phenomenon.All need be through strict processing before and after rear two kinds of pump thermal treatments, particularly mechanical workout is difficult to after the thermal treatment.
The key part oil pumping barrel diameter of oil well pump is less by 28-95, and length is grown (can reach more than 8000 millimeters), is a kind of typical long cylinder, and to carry out internal surface sclerosis under the prerequisite of micro-deformation very difficult only having.
Summary of the invention
The purpose of this invention is to provide a kind of soft steel that both had been applicable to use, also be applicable to the method for the long cylinder inner wall surface hardening treatment made with medium carbon steel, medium carbon alloy steel, low-carbon alloy steel.
The present invention is achieved by the following technical solutions:
A kind of inner wall surface hardening process of soft steel steel cylindrical workpiece includes following operation steps:
A. soft steel steel cylindrical workpiece inwall is carried out carburizing or carbonitriding processing;
B. steel cylindrical workpiece inwall is carried out the Hang mill;
C. more described steel cylindrical workpiece inwall is carried out plasma spiral scan hardening treatment.
It is soft steel steel cylindrical workpiece to be placed on carry out carbonitriding in the pit furnace under 860-900 ℃ temperature that described carbonitriding is processed.
Advantage of the present invention is:
Because steel are after carburizing or carbonitriding, the carbon content of steel surface improves, even soft steel, surface carbon content also can reach more than 0.8%, no matter so be the long cylinder made of soft steel or medium carbon steel, medium carbon alloy steel, low-carbon alloy steel all available aforesaid method make the sclerosis of long cylinder inner wall surface, thereby enlarged the selection range of making long cylinder.
The invention will be further described below in conjunction with embodiment.
The oil pumping barrel made from 20 steel, 45# steel, 42CrMo or 20CrMo steel pipe, in pit furnace, under 860-900 ℃ temperature, the pump barrel inwall is carried out carburizing or carbonitriding respectively, then the pump barrel inwall through carbonitriding is carried out the Hang mill, at last to pump barrel inwall plasma quenching hardening treatment.
The surface hardness of oil pumping barrel inwall can reach more than the Hv900 after aforesaid method is processed.
Claims (1)
1. the inner wall surface hardening process of a soft steel steel cylindrical workpiece is characterized in that, includes following operation steps:
A. soft steel steel cylindrical workpiece inwall is carried out carburizing or carbonitriding processing;
B. steel cylindrical workpiece inwall is carried out the Hang mill;
C. more described steel cylindrical workpiece inwall is carried out plasma spiral scan hardening treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102660800A CN103352106A (en) | 2013-06-28 | 2013-06-28 | Surface-hardening treatment method for inner wall of low-carbon steel long cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102660800A CN103352106A (en) | 2013-06-28 | 2013-06-28 | Surface-hardening treatment method for inner wall of low-carbon steel long cylinder |
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| Publication Number | Publication Date |
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| CN103352106A true CN103352106A (en) | 2013-10-16 |
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| CN2013102660800A Pending CN103352106A (en) | 2013-06-28 | 2013-06-28 | Surface-hardening treatment method for inner wall of low-carbon steel long cylinder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369016A (en) * | 2015-10-26 | 2016-03-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for improving surface strength of high-strength alloy transmission rod |
| CN113005394A (en) * | 2021-02-22 | 2021-06-22 | 山东农业大学 | J55 steel pipe processing method based on rare earth catalytic carbonitriding |
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| JPH073330A (en) * | 1993-06-18 | 1995-01-06 | Nkk Corp | Production of high tensile strength and high toughness bent tube excellent in corrosion resistance |
| JPH07316640A (en) * | 1994-03-29 | 1995-12-05 | Mazda Motor Corp | Carburization hardening method and driving power transmission member subjected to carburization hardening |
| CN1121115A (en) * | 1994-05-07 | 1996-04-24 | 铁岭石油机械研究制造所 | Surface hardening treatment method for inner wall of long cylinder |
| CN1182800A (en) * | 1996-11-20 | 1998-05-27 | 山东矿业学院 | Method of quick scan fusing hardening for surface of cast iron |
| CN1197126A (en) * | 1997-04-22 | 1998-10-28 | 山东矿业学院 | Method for hardening surface of metal parts |
| CN103132085A (en) * | 2011-12-05 | 2013-06-05 | 江苏亚洲气体设备有限公司 | Inner wall surface hardening processing method |
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2013
- 2013-06-28 CN CN2013102660800A patent/CN103352106A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH073330A (en) * | 1993-06-18 | 1995-01-06 | Nkk Corp | Production of high tensile strength and high toughness bent tube excellent in corrosion resistance |
| JPH07316640A (en) * | 1994-03-29 | 1995-12-05 | Mazda Motor Corp | Carburization hardening method and driving power transmission member subjected to carburization hardening |
| CN1121115A (en) * | 1994-05-07 | 1996-04-24 | 铁岭石油机械研究制造所 | Surface hardening treatment method for inner wall of long cylinder |
| CN1182800A (en) * | 1996-11-20 | 1998-05-27 | 山东矿业学院 | Method of quick scan fusing hardening for surface of cast iron |
| CN1197126A (en) * | 1997-04-22 | 1998-10-28 | 山东矿业学院 | Method for hardening surface of metal parts |
| CN103132085A (en) * | 2011-12-05 | 2013-06-05 | 江苏亚洲气体设备有限公司 | Inner wall surface hardening processing method |
Non-Patent Citations (1)
| Title |
|---|
| 崔洪芝等: "常压等离子束气缸套内壁硬化处理技术的应用", 《机械工程材料》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369016A (en) * | 2015-10-26 | 2016-03-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for improving surface strength of high-strength alloy transmission rod |
| CN105369016B (en) * | 2015-10-26 | 2017-08-29 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of method for improving high-strength alloy steel drive link surface strength |
| CN113005394A (en) * | 2021-02-22 | 2021-06-22 | 山东农业大学 | J55 steel pipe processing method based on rare earth catalytic carbonitriding |
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Application publication date: 20131016 |