CN101775573A - Surface hardening treatment technology for oil distribution cover of plunger pump - Google Patents
Surface hardening treatment technology for oil distribution cover of plunger pump Download PDFInfo
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- CN101775573A CN101775573A CN 201010118644 CN201010118644A CN101775573A CN 101775573 A CN101775573 A CN 101775573A CN 201010118644 CN201010118644 CN 201010118644 CN 201010118644 A CN201010118644 A CN 201010118644A CN 101775573 A CN101775573 A CN 101775573A
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- ion
- oil cap
- hardening treatment
- ionic
- surface hardening
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Abstract
The invention discloses a surface hardening treatment technology for the oil distribution cover of a plunger pump. The technology is that the oil distribution cover of the plunger pump is nitrided first and N+ ions are injected on the surface of a workpiece to realize the composite surface hardening treatment of the workpiece. The invention has the advantages that the adhesive wear resistance and the abrasive wear resistance of the oil distribution cover of the plunger pump are obviously improved, the wear life of the part is prolonged and the service life of the treated plunger pump is improved by more than one time.
Description
Technical field
The present invention relates to a kind of workpiece surface strengthening treatment process, relate in particular to the surface Hardening Treatment technology that hydraulic planger pump divides oil cap, belong to precision component surface modification treatment field.
Background technology
Ram pump sucks low pressure fluid by dividing oil cap, and the high pressure chest from minute oil cap after high pressure compressed is exported, thereby changes mechanical energy into the hydraulic pressure energy.Dividing oil cap is the interior crucial parts with frication pair of ram pump, and its working face carries the big specific pressure thrust and the effect of high rotating speed heat of friction of rotor, also will keep the sealing property of working face simultaneously.Thereby, require to divide an oil cap working face working accuracy height, wear resistance good.Learn experience according to the pump internal friction, if mechanically resistant material and soft material pairing, it is hard that buffing takes place, and its wear mechanism is mainly abrasive wear.Handling with the nitriding of copper alloy paired in the ram pump divides the common premature wear in oil cap surface serious, confirms that the wear-resistant grain wearing and tearing of material surface are not enough, and the not anti-dry grinding of steel of nitriding processing, can generate the white layer of deleterious friction.Need find out a kind of surface modification technology method, can further improve the ability of its antistick wearing and tearing and wear-resistant grain wearing and tearing, can keep the dimensional precision of working face again.
The method of the surface strengthening of existing workpiece has a variety of, as nitridation process, vapour deposition, ion implantation technique etc.It is undesirable that nitriding steel divides the working face of oil cap to only depend on nitriding to handle the method for strengthening, and ram pump is worked under critical working condition and the situation of the aggravation of oil cap surface abrasion, internal leakage increase, the reduction of pump life-span can be occurred dividing.
Ion implantation technology is in vacuum system, with being injected into solid material surface through the energetic ion that quickens, causes material composition and structural changes, thereby forms the upper layer of a reinforcement at selected working surface region.One of ion implantation feature is to inject under vacuum and lesser temps, and not oxidation of part, indeformable can keep original dimensional precision and surfaceness, can be used as the final treatment process of precision component.Verified, steel carries out the ion implantation antistick wearing and tearing and the wear-resistant grain wearing and tearing ability that can obviously improve steel again after nitriding is handled.Existing ion implantation technology generally comprises conventional ion implantttion technique (being called for short C I in the world) and comprehensive ion implantation technique (being called for short PS II in the world).It is by ionic fluid workpiece surface to be carried out line-of-sight process to inject that conventional ion injects; Comprehensive ion implantation technique is that processed workpiece directly is immersed in the high density plasma, applies the pulse negative high voltage on workpiece, realizes omnibearing ion implantation.Adopt the conventional ion injection+comprehensive ion implantation compound implantttion technique of different-energy to improve surface ion concentration and homogeneity, guaranteed the stability of implantation quality, wear-out life and the reliability of handling the back workpiece improve greatly.But ion implantation technique is applied on the precision component of aviation field such as bearing and so on mostly, divides the ion implantation technology of oil cap up to the present not use as yet at ram pump.
Summary of the invention
The surface Hardening Treatment technology that provides a kind of ram pump to divide oil cap is provided.The present invention can significantly improve ram pump and divide oil cap antistick wearing and tearing and wear-resistant grain wearing and tearing ability, thereby improves the result of use of dividing oil cap and prolong the work-ing life of dividing oil cap.
Technical scheme of the present invention: a kind of ram pump divides the surface Hardening Treatment technology of oil cap, and this technology is will divide the oil cap surface to carry out nitriding earlier to handle, then by N is injected on a minute oil cap surface
+Ion realizes dividing the surface Hardening Treatment of oil cap.
Above-mentioned ram pump divides in the surface Hardening Treatment technology of oil cap, and is described to workpiece surface injection N
+Ion is to carry out N earlier
+The conventional implantttion technique of ionic is carried out N again
+The comprehensive implantttion technique of ionic.
Aforesaid ram pump divides in the surface Hardening Treatment technology of oil cap, described N
+The conventional implantttion technique of ionic adopts the injection energy of 60～70KeV, and implantation dosage is controlled at 4 * 10
17～8 * 10
17Ion/cm
2, working vacuum degree: 5.0 * 10
3～6.0 * 10
3Pa; Described N
+The comprehensive implantttion technique of ionic adopts the injection energy of 35～45KeV, and implantation dosage is controlled at 0.5 * 10
17～1.5 * 10
17Ion/cm
3, working vacuum degree: 5.0 * 10
-3～6.0 * 10
-3Pa.
Aforesaid ram pump divides in the surface Hardening Treatment technology of oil cap, described N
+The conventional implantttion technique of ionic adopts the injection energy of 70KeV, and implantation dosage is controlled at 6 * 10
17Ion/cm
2, working vacuum degree: 6.0 * 10
-3Pa; Described N
+The comprehensive implantttion technique of ionic adopts the injection energy of 45KeV, and implantation dosage is controlled at 1.0 * 10
17Ion/cm
3, working vacuum degree: 6.0 * 10
-3Pa.
Compared with prior art, the present invention handles by dividing the surface of oil cap to carry out nitriding to ram pump earlier, and N reinjects
+Ion is realized the surface strengthening of workpiece.The present invention divides oil cap to adopt nitriding+N to ram pump
+After ion implantation, the nitrogen concentration of element on the nearly top layer of workpiece is handled than simple nitriding and has been improved 2～3 times, and the amorphous film that the top layer forms, refinement polycrystal layer, second build up effect such as precipitation mutually make the surface microhardness raising, the antistick wearing and tearing ability of workpiece is greatly improved, the abrasive wear resistance ability obviously improves, and the frictional coefficient of the friction pair of workpiece is reduced, bearing capacity increases; The present invention injects N to workpiece surface
+Ion is to carry out N earlier
+The conventional implantttion technique (C I) of ionic is carried out N again
+The comprehensive implantttion technique of ionic (PS II), this surface Hardening Treatment have not only significantly improved workpiece antistick wearing and tearing, wear-resistant grain wearing and tearing ability, and the workpiece surface intensive treatment is even, has improved the stability of workpiece.The parameters combination of ion implantation technique is the result who obtains by repetition test, comparison, conclusion and summary the applicant, the effect highly significant, the recirculating oil quantity curve of ram pump is straight or the situation that rises gently, and the life-span is more than doubled, and the working reliability of pump also improves greatly.
Description of drawings
Fig. 1 is the conventional principle of work synoptic diagram that injects of the present invention;
Fig. 2 is the comprehensive ion implantation principle of work synoptic diagram of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Embodiment.A kind of ram pump divides the surface Hardening Treatment technology of oil cap, and this technology is will divide the oil cap surface to carry out nitriding earlier to handle, then by N is injected on a minute oil cap surface
+Ion realizes dividing the surface Hardening Treatment of oil cap; Inject N
+Ion is to carry out N earlier
+Ionic conventional ion implantttion technique is carried out N again
+Ionic is comprehensive ion implantation; Described N
+The conventional implantttion technique of ionic adopts the injection energy of 70KeV, and implantation dosage is controlled at 6 * 10
17Ion/cm
2, working vacuum degree: 6.0 * 10
-3Pa; Described N
+The comprehensive implantttion technique of ionic adopts the injection energy of 45KeV, and implantation dosage is controlled at 1.0 * 10
17Ion/cm
3, working vacuum degree: 6.0 * 10
-3Pa.
Technical process of the present invention: 1, nitriding steel divides oil cap modifier treatment (the 38CrMoAlA steel is with reference to the new 1-92 of enterprise's sample, and the 25Cr3MoA steel is with reference to HB/Z136-88); 2, minute oil cap is carried out precision work; 3, minute oil cap is carried out gas nitriding (with reference to the HB/Z79-95 two-phase method), hardness 38CrMoAlA 〉=900HV5 after the nitriding, 25Cr3MoA 〉=800HV5; 4, push away the working face that grinds the branch oil cap; 5, conventional ion is carried out on a minute oil cap surface and inject (C I)+comprehensive ion implantation (PS II).Ion implantation back quality inspection: 1. accompany the microhardness value after sample ion injects to improve more than 10% than before injecting; 2. the planeness and the surfaceness that detect the part injection face after injecting once more should meet the requirement of detail design drawing.
N among the present invention
+The principle of work of ionic conventional ion implantttion technique (CI) as shown in Figure 1, N
+Ion is penetrated by ion source 1, forms ionic fluid 3 through accelerator 2, is fixed on the workpiece that rotates with workpiece bobbing target 5 on the workpiece bobbing target 5 at vacuum system 4 intermediate ion bundles 3 bumps, and N is carried out on workpiece 6 surfaces
+The conventional implantttion technique (CI) of ionic; N
+The principle of work of the comprehensive ion implantation technique of ionic (PSII) as shown in Figure 2, the workpiece 6 that is installed on the worktable 9 is arranged in the vacuum system 8 that is full of plasma body 11, when high-voltage pulse power source 7 energisings the high-voltage pulse 10 that connects work stage 9 is introduced electrode, hot-cathode filament 11 is realized the N on workpiece 6 surfaces as ion source
+The comprehensive injection of ion (PSII).
N among the present invention
+The parameter of ion implantation technique:
| Project | Conventional ion injects (CI) | Comprehensive ion implantation (PSII) |
| Ionic species | ??N ++N 2 + | ??N ++N 2 + |
| Inject energy | ??(60～70)KeV | ??(35～45)KeV |
| Implantation dosage | ??(4～8)×10 17Ion/cm 2 | ??(0.5～1.5)×10 17Ion/cm 2 |
| The working vacuum degree | ??(5.0～6.0)×10 -3Pa | ??(5.0～6.0)×10 -3Pa |
| Method of cooling | Special-purpose water-cooled anchor clamps | Special-purpose water-cooled anchor clamps |
| Injection mode | Interval type | Interval type |
According to art methods, promptly divide oil cap only to carry out nitriding and handle the time-division oil cap working face serious wear of then under critical working condition, working, the fluid internal leakage increases, the recirculating oil quantity of ram pump raises fast, the decrease in efficiency and the lost of life, for high-power pump performance more so.The branch oil cap that adopts back-plunger pump of the present invention is by nitriding+N
+Ion implantation technique makes the nitrogen concentration of element on the nearly top layer of workpiece improve 2～3 times than simple nitriding processing, and the amorphous film that forms at workpiece surface, refinement polycrystal layer, second build up effect such as precipitation mutually make the surface microhardness raising, the antistick wearing and tearing ability of workpiece and wear-resistant grain wearing and tearing ability obviously improve, and the while frictional coefficient of friction pair reduces, bearing capacity increases.The actual effect of the ram pump after the present invention handles shows as, and the recirculating oil quantity curve of ram pump is straight or the situation that rises gently, and the life-span of pump is enhanced about more than once, and the working reliability of pump improves greatly.
Claims (4)
1. surface Hardening Treatment technology that ram pump divides oil cap is characterized in that: this technology will divide the oil cap surface to carry out nitriding earlier to handle, then by a N is injected on a minute oil cap surface
+Ion realizes dividing the surface Hardening Treatment of oil cap.
2. ram pump according to claim 1 divides the surface Hardening Treatment technology of oil cap, it is characterized in that: described to workpiece surface injection N
+Ion is to carry out N earlier
+The conventional implantttion technique of ionic is carried out N again
+The comprehensive implantttion technique of ionic.
3. ram pump according to claim 2 divides the surface Hardening Treatment technology of oil cap, it is characterized in that: described N
+The conventional implantttion technique of ionic adopts the injection energy of 60～70KeV, and implantation dosage is controlled at 4 * 10
17～8 * 10
17Ion/cm
2, working vacuum degree: 5.0 * 10
-3～6.0 * 10
-3Pa; Described N
+The comprehensive implantttion technique of ionic adopts the injection energy of 35～45KeV, and implantation dosage is controlled at 0.5 * 10
17～1.5 * 10
17Ion/cm
3, working vacuum degree: 5.0 * 10
-3～6.0 * 10
-3Pa.
4. ram pump according to claim 3 divides the surface Hardening Treatment technology of oil cap, it is characterized in that: described N
+The conventional implantttion technique of ionic adopts the injection energy of 70KeV, and implantation dosage is controlled at 6 * 10
17Ion/cm
2, working vacuum degree: 6.0 * 10
-3Pa; Described N
+The comprehensive implantttion technique of ionic adopts the injection energy of 45KeV, and implantation dosage is controlled at 1.0 * 10
17Ion/cm
3, working vacuum degree: 6.0 * 10
-3Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010118644 CN101775573A (en) | 2010-03-05 | 2010-03-05 | Surface hardening treatment technology for oil distribution cover of plunger pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010118644 CN101775573A (en) | 2010-03-05 | 2010-03-05 | Surface hardening treatment technology for oil distribution cover of plunger pump |
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| CN101775573A true CN101775573A (en) | 2010-07-14 |
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| CN 201010118644 Pending CN101775573A (en) | 2010-03-05 | 2010-03-05 | Surface hardening treatment technology for oil distribution cover of plunger pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835055A (en) * | 2017-03-08 | 2017-06-13 | 南华大学 | A kind of nuclear grade stainless steel of wear resistant corrosion resistant |
| CN113464511A (en) * | 2021-06-30 | 2021-10-01 | 北京航空航天大学宁波创新研究院 | Bimetal oil separating cover |
-
2010
- 2010-03-05 CN CN 201010118644 patent/CN101775573A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 《航空制造技术》 20011231 尹克里 《离子注入在航空液压泵中的应用》 39-41 1-4 , 第6期 * |
| 《航空材料学报》 20031231 尹克里等 《离子注入技术在航空柱塞泵批量生产中的应用》 295 1-2 , * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835055A (en) * | 2017-03-08 | 2017-06-13 | 南华大学 | A kind of nuclear grade stainless steel of wear resistant corrosion resistant |
| CN106835055B (en) * | 2017-03-08 | 2019-08-09 | 南华大学 | A kind of nuclear grade stainless steel of wear resistant corrosion resistant |
| CN113464511A (en) * | 2021-06-30 | 2021-10-01 | 北京航空航天大学宁波创新研究院 | Bimetal oil separating cover |
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Open date: 20100714 |