CN102465250A - Plasma nitriding process - Google Patents
Plasma nitriding process Download PDFInfo
- Publication number
- CN102465250A CN102465250A CN2010105551178A CN201010555117A CN102465250A CN 102465250 A CN102465250 A CN 102465250A CN 2010105551178 A CN2010105551178 A CN 2010105551178A CN 201010555117 A CN201010555117 A CN 201010555117A CN 102465250 A CN102465250 A CN 102465250A
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- CN
- China
- Prior art keywords
- temperature
- furnace
- air cylinder
- cylinder liner
- nitriding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses a plasma nitriding process. A plasma nitriding furnace is adopted, and after being checked out to be qualified, an air cylinder liner meeting a dimensional requirement is cleaned with detergent or gasoline and is placed into the furnace after being aired. The furnace is internally vacuumized, then, ammonia gas is introduced, the temperature is raised to 400 DEG C at the rate being not more than 50 DEG C per hour and is kept for 1 hour, the temperature is slowly raised to 480 DEG C and kept for 5 hours and then is reduced to 150 DEG C at the rate being not higher than 50 DEG C per hour, and the air cylinder liner is discharged out of the furnace. The air cylinder liner subjected to nitriding treatment in such a way is silver grey; because the plasma nitriding temperature is lower than the gas nitriding temperature, the deformation of a product is small, so that an operating requirement can be met without subsequent processing; and the processed air cylinder liner is good in surface quality.
Description
Affiliated technical field
The present invention relates to the technology of the plasma nitridation process of plasma nitridation process technology, particularly cast iron cylinder cover.
Background technology
Cylinder sleeve is the core part of mover, also is consumable accessory, and mostly the cylinder sleeve failure mode is the not wear-resisting cylinder sleeve premature wear that causes of endoporus.In order to improve the endoporus wear resisting property, adopt gas nitriding technology that cylinder sleeve is carried out whole nitriding treatment more.Nitriding temperature is high but traditional gas nitriding is handled, and the nitrogenize distortion is bigger, thereby also will reserve the distortion that product is eliminated in the processing of surplus process honing machine, and nitride layer is also removed by part like this.
Summary of the invention
In order to improve the wear-resistant ability of cylinder sleeve product; Reduce the Internal Hole Deformation that the cylinder sleeve nitriding treatment causes, the present invention provides ion Plasma Nitriding Treatment technology, can reduce the nitrogenize distortion; Guarantee the dimensional requirement that the cylinder sleeve finished product is satisfied in the distortion of product after the nitrogenize, satisfy the wear-resistant ability of cylinder sleeve.
The technical solution adopted for the present invention to solve the technical problems is, adopts plasma nitrided stove, and cylinder sleeve is carried out ion Plasma Nitriding Treatment to cylinder sleeve under the temperature about 480 ℃.
The invention has the beneficial effects as follows, adopt plasma nitridation process technology, power consumption is lacked in the nitridation process, and the ammonia of consumption is few, the product appearance silver gray, and nitriding temperature is low, and the distortion of cylinder sleeve is little.
Description of drawings
This specification sheets does not have description of drawings.
The practical implementation method
The technical solution adopted for the present invention to solve the technical problems is: equipment adopts plasma desalination stove.The cylinder sleeve that satisfies dimensional requirement through the cylinder sleeve of clean-out system or gasoline cleaning, is dried fed to boiler through after the assay was approved.Vacuumize in the stove, feed ammonia then,, be warming up to 400 ℃, be incubated 1 hour, and then slowly be warming up to 480 ℃, be incubated 5 hours, be cooled to 150 ℃ and come out of the stove per hour not to be higher than 50 ℃ then not to be higher than per hour 50 ℃.Through the cylinder sleeve color silver gray of such nitriding treatment, because plasma nitrided temperature is lower than the gas nitriding temperature, the distortion of product is very little, reaches not that following process just can satisfy request for utilization, and surface quality is good.The ammonia amount of using simultaneously is few, and the electric energy of consumption is few.
Claims (1)
1. plasma nitridation process is characterized in that: not to be higher than per hour 50 ℃, be warming up to 400 ℃, be incubated 1 hour, and then slowly be warming up to 480 ℃, be incubated 5 hours, be cooled to 150 ℃ and come out of the stove per hour not to be higher than 50 ℃ then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105551178A CN102465250A (en) | 2010-11-17 | 2010-11-17 | Plasma nitriding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105551178A CN102465250A (en) | 2010-11-17 | 2010-11-17 | Plasma nitriding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102465250A true CN102465250A (en) | 2012-05-23 |
Family
ID=46069367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105551178A Pending CN102465250A (en) | 2010-11-17 | 2010-11-17 | Plasma nitriding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102465250A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110293153A (en) * | 2019-05-30 | 2019-10-01 | 荆州环球汽车零部件制造有限公司 | The accurate aligning method of appearance color consistency is kept after a kind of crankshaft ionic nitriding |
-
2010
- 2010-11-17 CN CN2010105551178A patent/CN102465250A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110293153A (en) * | 2019-05-30 | 2019-10-01 | 荆州环球汽车零部件制造有限公司 | The accurate aligning method of appearance color consistency is kept after a kind of crankshaft ionic nitriding |
| CN110293153B (en) * | 2019-05-30 | 2020-06-09 | 荆州环球汽车零部件制造有限公司 | Accurate straightening method for keeping appearance color consistency after crankshaft ion nitriding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Xu Jinlan Document name: Notification of before Expiration of Request of Examination as to Substance |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Jia Weizhen Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120523 |