CN109207903A - A kind of excavator guide valve fitment anti-carburizi ng technique - Google Patents
A kind of excavator guide valve fitment anti-carburizi ng technique Download PDFInfo
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- CN109207903A CN109207903A CN201810996642.XA CN201810996642A CN109207903A CN 109207903 A CN109207903 A CN 109207903A CN 201810996642 A CN201810996642 A CN 201810996642A CN 109207903 A CN109207903 A CN 109207903A
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- China
- Prior art keywords
- workpiece
- carburizi
- guide valve
- copper
- valve fitment
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/04—Treatment of selected surface areas, e.g. using masks
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/38—Coating with copper
- C23C18/40—Coating with copper using reducing agents
- C23C18/405—Formaldehyde
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemically Coating (AREA)
Abstract
The invention discloses a kind of excavator guide valve fitment anti-carburizi ng techniques, including turner surface, in workpiece surface electroless copper, smart car workpiece, carburizing and quenching and strip above step, the present invention, which is utilized, forms copper plate in workpiece surface to workpiece surface copper coating, then smart car removes the copper plate of local carburzing portion faces on workpiece, instead of the method in traditional anti-carburizi ng technique in workpiece surface spraying masking paste, with easy to operate, it is high-efficient, feature at low cost, and after the completion of workpiece carbonization quenching, the copper plate for being covered on workpiece surface can be removed easily by decoating liquid, it is time saving and energy saving.
Description
Technical field
The present invention relates to heat treatment technics, in particular to a kind of excavator guide valve fitment anti-carburizi ng technique.
Background technique
For machining, heat treatment is a highly important fundamental technology, to the inherence for improving machine components
Quality and service life have a decisive role.Some accessories (such as gland) of excavator pilot valve are during fabrication, it is desirable that
Local carburzing quenching treatment is carried out to accessory, and other positions of accessory need to carry out anti-carburizi ng protection processing.At present for normal
Two kinds of anti-carburizi ng methods are as follows:
One, first roughing part, then Carburization Treatment is carried out, it is then finished to the carburized layer that removal does not need hardening position, finally
It is quenched again.This method need to separate carburizing and quenching process, need to open furnace twice, waste larger, turnover trouble, cost compared with
Height, and the technique is gradually eliminated.
Two, directly part is processed in place, applies antiseepage carbon material at the position for not needing hardening, finally carries out carburizing and quench
Fire.This method carburizing and quenching process can be completed once, but apply antiseepage carbon material and need artificial, time-consuming and laborious, smearing unevenness
It is even, quality is influenced, and antiseepage carbon material is solidificated in piece surface after quenching, bonding force is strong, is difficult to remove.
Such as: a kind of entitled compressor of air conditioner accessory of China Patent Publication No. CN105568205A, patent of invention are anti-
Carburizing construction technology, it includes ultrasonic cleaning and drying, spraying Al2O3 coating, the mixing for spraying Cu, bonding agent and boron nitride
Object coating and sintering, which is made by the way that the mixture of Cu, bonding agent and boron nitride to be sprayed in aluminium base on overlay film
It obtains copper liquid to penetrate into aluminium base in the pore of overlay film, and is securely seated between in aluminium base on overlay film after cooling down, coating will not be shelled
From the infiltration of anti-blocking.The invention is disadvantageous in that: preparing for impermeable coating is relatively complicated, and impermeable coating is spray coated
Journey is bothersome laborious, and after the completion of carburizing and quenching, since paint adhesion is strong, removal is more difficult.
Summary of the invention
Present invention aim to address existing anti-carburizi ng process requirements manually to workpiece surface spraying side's carburizing coating, takes
When laborious and inefficiency the problem of, a kind of excavator guide valve fitment anti-carburizi ng technique is provided, there is simple process, it is high-efficient
The advantages of.
The purpose of the present invention is what is be achieved through the following technical solutions: a kind of excavator guide valve fitment anti-carburizi ng technique,
The following steps are included:
(1) turning is carried out to workpiece, machining allowance is stayed at the local carburzing position on workpiece, remaining position of workpiece is machined to drawing
Size；
(2) electroless copper is carried out to workpiece surface；
(3) smart car is carried out to the local carburzing position on workpiece, local carburzing position is machined to drawing size；
(4) carburizing and quenching processing is carried out to workpiece；
(5) chemical strip is carried out to workpiece, removes the copper plate of workpiece surface.
The present invention by way of turning by will need to carry out the position of local carburzing in workpiece surface copper facing on workpiece
On copper plate removal, and play the purpose of anti-carburizi ng due to being covered with copper plate on other positions of workpiece.Since copper facing is grasped
To make simple, required chemical bronze plating liquid allotment is simple when copper facing, and it is cheap, and in copper facing, it can disposably in large quantity
Copper facing operation is carried out to workpiece, working efficiency greatly improves；And traditional anti-carburizi ng technique, due to using masking paste, at
This is higher, and masking paste generally requires to spray to workpiece surface one by one, and time-consuming and laborious, working efficiency is low.It quenches in carburizing
After the completion of fire, the copper plate of workpiece surface can be removed easily by decoating liquid, and traditional masking paste is due to bonding force
By force, it is difficult to remove.Therefore, the present invention is opposite with traditional copper-plating technique, economical good, simple process, high-efficient advantage.
Preferably, machining allowance is 0.1-0.15 millimeters in step (1).
Preferably, carrying out copper facing, the formula of chemical bronze plating liquid are as follows: sulphur to workpiece using chemical bronze plating liquid in step (2)
Sour copper -10g/L, EDETATE SODIUM salt -20g/L, formaldehyde (37% concentration) -20ml/L, sodium hydroxide -10g/L, dimethyl dichlorosilane (DMCS) -
0.25g/L。
Preferably, when to workpiece copper facing, the pH value of chemical bronze plating liquid is controlled between 11.5-12.5 in step (2),
Temperature is controlled at 65 ± 5 DEG C.
Preferably, utilizing the copper plate of decoating liquid removal workpiece surface, the formula of decoating liquid are as follows: resist printing in step (5)
Salt S- 150g/L, ammonium nitrate -100g/L, ammonium hydroxide (25% concentration) -100ml/L.
Preferably, when carrying out chemical strip to workpiece, temperature is 25 DEG C, and the strip time is 2-4 minutes in step (5).
Preferably, carburizing mode is gas carburizing in step (4), carburizing temperature is 900-920 DEG C, is kept for 3 hours.
Preferably, in step (4), when workpiece quenching, workpiece is heated to 780-820 DEG C, after heat preservation using quenching oil into
Row cooling.
The beneficial effects of the present invention are: the present invention, which is utilized, forms copper facing in workpiece surface to workpiece surface copper coating
Layer, then by smart car removing workpiece on local carburzing portion faces copper plate, instead of in traditional anti-carburizi ng technique in work
The method of part surface spraying seepage prevention carbon coating, have the characteristics that it is easy to operate, high-efficient, at low cost, and workpiece carbonization quench
After the completion, the copper plate for being covered on workpiece surface can be removed easily by decoating liquid, it is time saving and energy saving.
Detailed description of the invention
Fig. 1 is gland structure schematic diagram.
In figure: 1, gland.
Specific embodiment
Below by specific embodiment and in conjunction with attached drawing, the invention will be further described.
Referring to Fig. 1, a kind of excavator guide valve fitment anti-carburizi ng technique, by taking gland as an example, to specific implementation of the invention
Mode is described.Fig. 1 is the structural schematic diagram of gland.Gland is an important component on excavator pilot valve.Under gland
Side is provided with the conical surface (according to the overlying relation in Fig. 1).In practical manufacturing process, need to carry out the conical surface local infiltration
Carbon processing, and the other parts on gland in addition to the conical surface do not need then to carry out Carburization Treatment.The present invention includes following specific step
It is rapid:
(1) turning is integrally carried out to gland, 0.1-0.15 millimeters of machining allowance is stayed on gland at the conical surface, on gland other than the conical surface
Position be machined to drawing size.
(2) electroless copper is carried out to gland surfaces.When copper facing, copper coating is carried out to gland using chemical bronze plating liquid.Change
Copper plating bath is learned according to being deployed as following formula: copper sulphate -10g/L, EDETATE SODIUM salt -20g/L, formaldehyde (37% concentration) -20ml/
L, sodium hydroxide -10g/L, dimethyl dichlorosilane (DMCS) -0.25g/L.When copper facing, the pH value of chemical bronze plating liquid is controlled in 11.5-12.5
Between, temperature is controlled at 65 ± 5 DEG C.The copper facing time is 1 hour.After the completion of copper facing, gland surfaces should be made to form covering gland complete
Portion surface and copper plate in homogeneous thickness.In actual operation, multiple glands can be disposably accommodated in electroplating bath while being changed
Copper facing is learned, is improved work efficiency.
(3) smart car is carried out to the conical surface on gland, drawing size will be machined at the conical surface, while will be covered on the conical surface
Copper plate removes.
(4) carburizing and quenching processing is carried out to gland.In the present embodiment, part is carried out to gland in the way of gas carburizing
Carburization Treatment.When carburizing, workpiece is placed in gas carbruizing furance, carburizing medium is added in furnace, carburizing temperature control is existed
It 900-920 DEG C, is kept for 3 hours.The carburizing medium can be kerosene, benzene class, methanol, ethyl alcohol and ethyl acetate or other infiltrations
Carbon medium.In the present embodiment, use methanol as carburizing medium.After the completion of carburizing, the carburizing depth on gland at the conical surface exists
Between 0.4-0.6 millimeters.Gland is quenched after completing Carburization Treatment.When quenching, temperature is heated to 780-820 DEG C, protects
It is cooled down after temperature using quenching oil.After cooling, the hardness at the gland conical surface is 58-62HRC.It Carburization Treatment and was quenched
The heating process of Cheng Zhong, workpiece are completed in the same stove.
(5) chemical strip is carried out to gland, removes the copper plate of gland surfaces.Before strip, first gland is cleaned.It moves back
When plating, the copper plate of decoating liquid removal gland surfaces is utilized.Decoating liquid is deployed using formula as below: reservehao S -150g/
L, ammonium nitrate -100g/L, ammonium hydroxide (25% concentration) -100ml/L.When strip, at 25 DEG C, the strip time is 2-4 points for temperature control
Clock.
The present invention by way of turning by will need to carry out the position of local carburzing in workpiece surface copper facing on workpiece
On copper plate removal, and play the purpose of anti-carburizi ng due to being covered with copper plate on other positions of workpiece.Since copper facing is grasped
To make simple, required chemical bronze plating liquid allotment is simple when copper facing, and it is cheap, and in copper facing, it can disposably in large quantity
Copper facing operation is carried out to workpiece, working efficiency greatly improves；And traditional anti-carburizi ng technique, due to using masking paste, at
This is higher, and masking paste generally requires to spray to workpiece surface one by one, and time-consuming and laborious, working efficiency is low.It quenches in carburizing
After the completion of fire, the copper plate of workpiece surface can be removed easily by decoating liquid, and traditional masking paste is due to bonding force
By force, it is difficult to remove.Therefore, the present invention is opposite with traditional copper-plating technique, economical good, simple process, high-efficient advantage.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (8)
1. a kind of excavator guide valve fitment anti-carburizi ng technique, which comprises the following steps:
(1) turning is carried out to workpiece, machining allowance is stayed at the local carburzing position on workpiece, remaining position of workpiece is machined to drawing
Size；
(2) electroless copper is carried out to workpiece surface；
(3) smart car is carried out to the local carburzing position on workpiece, local carburzing position is machined to drawing size；
(4) carburizing and quenching processing is carried out to workpiece；
(5) chemical strip is carried out to workpiece, removes the copper plate of workpiece surface.
2. a kind of excavator guide valve fitment anti-carburizi ng technique according to claim 1, which is characterized in that in step (1),
Machining allowance is 0.1-0.15 millimeters.
3. a kind of excavator guide valve fitment anti-carburizi ng technique according to claim 1, which is characterized in that in step (2),
Copper facing, the formula of chemical bronze plating liquid are carried out to workpiece using chemical bronze plating liquid are as follows: copper sulphate -10g/L, EDETATE SODIUM salt -20g/L,
Formaldehyde (37% concentration) -20ml/L, sodium hydroxide -10g/L, dimethyl dichlorosilane (DMCS) -0.25g/L.
4. a kind of excavator guide valve fitment anti-carburizi ng technique according to claim 3, which is characterized in that in step (2),
When to workpiece copper facing, the pH value of chemical bronze plating liquid is controlled between 11.5-12.5, and temperature is controlled at 65 ± 5 DEG C.
5. a kind of excavator guide valve fitment anti-carburizi ng technique according to claim 1, which is characterized in that in step (5),
Utilize the copper plate of decoating liquid removal workpiece surface, the formula of decoating liquid are as follows: reservehao S -150g/L, ammonium nitrate -100g/L,
Ammonium hydroxide (25% concentration) -100ml/L.
6. a kind of excavator guide valve fitment anti-carburizi ng technique according to claim 5, which is characterized in that in step (5),
When carrying out chemical strip to workpiece, temperature is 25 DEG C, and the strip time is 2-4 minutes.
7. a kind of excavator guide valve fitment anti-carburizi ng technique according to claim 1 or 2 or 3 or 4 or 5 or 6, feature
It is, in step (4), carburizing mode is gas carburizing, and carburizing temperature is 900-920 DEG C, is kept for 3 hours.
8. a kind of excavator guide valve fitment anti-carburizi ng technique according to claim 1 or 2 or 3 or 4 or 5 or 6, feature
It is, in step (4), when workpiece quenching, workpiece is heated to 780-820 DEG C, is cooled down after heat preservation using quenching oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810996642.XA CN109207903A (en) | 2018-08-29 | 2018-08-29 | A kind of excavator guide valve fitment anti-carburizi ng technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810996642.XA CN109207903A (en) | 2018-08-29 | 2018-08-29 | A kind of excavator guide valve fitment anti-carburizi ng technique |
Publications (1)
| Publication Number | Publication Date |
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| CN109207903A true CN109207903A (en) | 2019-01-15 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810996642.XA Pending CN109207903A (en) | 2018-08-29 | 2018-08-29 | A kind of excavator guide valve fitment anti-carburizi ng technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110484857A (en) * | 2019-09-28 | 2019-11-22 | 贵州航天精工制造有限公司 | A kind of process improving eccentric bush performance |
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| CN102888610A (en) * | 2012-10-24 | 2013-01-23 | 哈尔滨东安发动机（集团）有限公司 | Thermal treatment method for internal spline gear with small modulus |
| CN106555154A (en) * | 2015-09-29 | 2017-04-05 | 常州兰翔机械有限责任公司 | A kind of driven gear heat treatment method |
| CN107030451A (en) * | 2017-04-19 | 2017-08-11 | 哈尔滨汽轮机厂有限责任公司 | A kind of carburizing and quenching thin-wall part anti-deformation method |
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2018
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|---|---|---|---|---|
| CN101812658A (en) * | 2009-09-28 | 2010-08-25 | 洛阳Lyc轴承有限公司 | Double carburization protecting process in manufacture of bearing outer ring of squirrel-cage elasticity support |
| CN102888610A (en) * | 2012-10-24 | 2013-01-23 | 哈尔滨东安发动机（集团）有限公司 | Thermal treatment method for internal spline gear with small modulus |
| CN106555154A (en) * | 2015-09-29 | 2017-04-05 | 常州兰翔机械有限责任公司 | A kind of driven gear heat treatment method |
| CN107030451A (en) * | 2017-04-19 | 2017-08-11 | 哈尔滨汽轮机厂有限责任公司 | A kind of carburizing and quenching thin-wall part anti-deformation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110484857A (en) * | 2019-09-28 | 2019-11-22 | 贵州航天精工制造有限公司 | A kind of process improving eccentric bush performance |
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Address after: 323010 No. 11 Lisha Road, Shuige Industrial Zone, Lishui City, Zhejiang Province Applicant after: Zhejiang Happy Tree Shock Absorber Co., Ltd. Address before: 323000 Lisha Road, Shuige Industrial Park, Liandu District, Lishui City, Zhejiang Province Applicant before: Zhejiang Yameili Auto Parts Co., Ltd. |
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Application publication date: 20190115 |