CN102925852A - Technique for eliminating nitrided porosity - Google Patents
Technique for eliminating nitrided porosity Download PDFInfo
- Publication number
- CN102925852A CN102925852A CN2012104671769A CN201210467176A CN102925852A CN 102925852 A CN102925852 A CN 102925852A CN 2012104671769 A CN2012104671769 A CN 2012104671769A CN 201210467176 A CN201210467176 A CN 201210467176A CN 102925852 A CN102925852 A CN 102925852A
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- China
- Prior art keywords
- nitriding
- workpiece
- porosity
- eliminating
- technique
- 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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Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005121 nitriding Methods 0.000 claims abstract description 40
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 16
- 238000003672 processing method Methods 0.000 claims description 11
- 229910021529 ammonia Inorganic materials 0.000 claims description 8
- 238000000354 decomposition reaction Methods 0.000 claims description 8
- 230000008030 elimination Effects 0.000 claims description 5
- 238000003379 elimination reaction Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000004513 sizing Methods 0.000 abstract 1
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention relates to the technical field of thermal treatment and specifically relates to a technique for eliminating nitrided porosity. The method comprises the steps as follows: cleaning and top sizing, nitriding gas and cleaning a workpiece. The technique for eliminating nitrided porosity is simple and reliable and increases the hardness and the smoothness on the surface of the workpiece so that the whole workpiece is beautiful; and simultaneously, the technique for eliminating nitrided porosity guarantees the grade precision on the surface of the workpiece, solves the problem that the contact fatigue strength of the workpeice is affected in the using process and is easily used and popularized.
Description
Technical field
The present invention relates to a kind of heat treated technical field, especially a kind of processing method of eliminating Nitriding porosity.
Background technology
Gas nitriding technique tends to produce and loosens, thereby has reduced the hardness of workpiece surface, increased the roughness of workpiece surface, affected the outward appearance of workpiece, simultaneously because the decline of surfaceness, the level accuracy of workpiece is descended, in use affect the contact fatigue strength of workpiece.
Summary of the invention
In order to overcome existing gas nitriding technique so that the deficiency that workpiece surface hardness is low, workpiece surface is coarse and the workpiece level accuracy is low the invention provides a kind of processing method of eliminating Nitriding porosity.
The technical solution adopted for the present invention to solve the technical problems is: a kind of processing method of eliminating Nitriding porosity, its method may further comprise the steps: clean and coat → cleaning of gas nitriding processing → workpiece.
According to another embodiment of the invention, further comprise and clean and when coating, at first workpiece is cleaned, remove the greasy dirt on surface, then workpiece is coated.
According to another embodiment of the invention, further comprise when gas nitriding is processed, with clean and coat after workpiece put into nitriding furnace, furnace temperature is risen to 490 ℃～505 ℃, ammonia decomposition is 35%, carry out the first paragraph nitriding treatment, be incubated 10 hours, furnace temperature remained on 490 ℃～505 ℃ again, ammonia decomposition is 75%～80%, carry out the second segment nitriding treatment, be incubated 90 hours.
According to another embodiment of the invention, behind the nitriding treatment, after the cooling down workpiece is taken out from nitriding furnace and clears up.
The invention has the beneficial effects as follows, the processing method of this elimination Nitriding porosity is simple and reliable, strengthened the hardness of workpiece surface, increased the slickness of workpiece surface, make whole workpiece comparatively attractive in appearance, guaranteed simultaneously the level accuracy of workpiece surface, solved the problem that in use affects the contact fatigue strength of workpiece, be easy to use and promote.
Embodiment
A kind of processing method of eliminating Nitriding porosity, its method may further comprise the steps: clean and coat → cleaning of gas nitriding processing → workpiece, clean and when coating, at first workpiece is cleaned, remove the greasy dirt on surface, then workpiece is coated, when gas nitriding is processed, with clean and coat after workpiece put into nitriding furnace, furnace temperature is risen to 490 ℃～505 ℃, ammonia decomposition is 35%, carry out the first paragraph nitriding treatment, be incubated 10 hours, furnace temperature remained on 490 ℃～505 ℃ again, ammonia decomposition is 75%～80%, carry out the second segment nitriding treatment, be incubated 90 hours, behind the nitriding treatment, after the cooling down workpiece taken out from nitriding furnace and clears up.
At first gear is cleaned, remove its surperficial greasy dirt, then gear is coated, gear after then will cleaning and coat is put into nitriding furnace, and furnace temperature is risen to 490 ℃～505 ℃, and ammonia decomposition is 35%, carry out the first paragraph nitriding treatment, be incubated 10 hours, furnace temperature remained on 490 ℃～505 ℃ again, ammonia decomposition is 75%～80%, carry out the second segment nitriding treatment, be incubated 90 hours, behind the nitriding treatment, after the cooling down gear taken out from nitriding furnace and clears up.The processing method of this elimination Nitriding porosity is simple and reliable, strengthened the hardness of workpiece surface, increased the slickness of workpiece surface, make whole workpiece comparatively attractive in appearance, guaranteed simultaneously the level accuracy of workpiece surface, solved the in use problem of the contact fatigue strength of workpiece, be easy to use and promote.
Claims (4)
1. a processing method of eliminating Nitriding porosity is characterized in that, its method may further comprise the steps: clean and coat → cleaning of gas nitriding processing → workpiece.
2. the processing method of elimination Nitriding porosity according to claim 1 is characterized in that, cleans and when coating, at first workpiece is cleaned, and removes the greasy dirt on surface, then workpiece is coated.
3. the processing method of elimination Nitriding porosity according to claim 1, it is characterized in that, when gas nitriding is processed, with clean and coat after workpiece put into nitriding furnace, furnace temperature is risen to 490 ℃～505 ℃, ammonia decomposition is 35%, carries out the first paragraph nitriding treatment, is incubated 10 hours, again furnace temperature is remained on 490 ℃～505 ℃, ammonia decomposition is 75%～80%, carries out the second segment nitriding treatment, is incubated 90 hours.
4. the processing method of elimination Nitriding porosity according to claim 1 is characterized in that, behind the nitriding treatment, after the cooling down workpiece is taken out from nitriding furnace and clears up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104671769A CN102925852A (en) | 2012-11-19 | 2012-11-19 | Technique for eliminating nitrided porosity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104671769A CN102925852A (en) | 2012-11-19 | 2012-11-19 | Technique for eliminating nitrided porosity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102925852A true CN102925852A (en) | 2013-02-13 |
Family
ID=47640774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104671769A Pending CN102925852A (en) | 2012-11-19 | 2012-11-19 | Technique for eliminating nitrided porosity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102925852A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779929A (en) * | 2016-03-16 | 2016-07-20 | 江苏丰东热处理及表面改性工程技术研究有限公司 | Non-brittle nitriding process for piston of engineering machinery |
| CN105839044A (en) * | 2016-06-03 | 2016-08-10 | 哈尔滨东安发动机（集团）有限公司 | Manufacturing method for titanium alloy gear |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067684A (en) * | 1991-06-15 | 1993-01-06 | 徐厚国 | Hot treating method for elastic parts |
| WO2007034998A1 (en) * | 2005-09-26 | 2007-03-29 | Showa Denko K.K. | Process for fabrication of nitride semiconductor light emitting device |
| CN101736283A (en) * | 2009-12-18 | 2010-06-16 | 大连海事大学 | Composite processing device and processing method for nitriding and oxidizing surface of low-alloy steel |
| CN102517541A (en) * | 2011-12-19 | 2012-06-27 | 台州市百达热处理有限公司 | Gas nitriding treatment method of 11Cr17 stainless steel slip sheet |
-
2012
- 2012-11-19 CN CN2012104671769A patent/CN102925852A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067684A (en) * | 1991-06-15 | 1993-01-06 | 徐厚国 | Hot treating method for elastic parts |
| WO2007034998A1 (en) * | 2005-09-26 | 2007-03-29 | Showa Denko K.K. | Process for fabrication of nitride semiconductor light emitting device |
| CN101736283A (en) * | 2009-12-18 | 2010-06-16 | 大连海事大学 | Composite processing device and processing method for nitriding and oxidizing surface of low-alloy steel |
| CN102517541A (en) * | 2011-12-19 | 2012-06-27 | 台州市百达热处理有限公司 | Gas nitriding treatment method of 11Cr17 stainless steel slip sheet |
Non-Patent Citations (2)
| Title |
|---|
| 刘建华等: "球铁曲轴盐浴氮碳共渗渗层疏松问题的解决方法", 《热加工工艺》 * |
| 火树鹏: "《钢的气体氮化》", 31 December 1984, 机械工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779929A (en) * | 2016-03-16 | 2016-07-20 | 江苏丰东热处理及表面改性工程技术研究有限公司 | Non-brittle nitriding process for piston of engineering machinery |
| CN105779929B (en) * | 2016-03-16 | 2019-01-01 | 江苏丰东热处理及表面改性工程技术研究有限公司 | A kind of engineering machinery piston is without brittleness nitriding process |
| CN105839044A (en) * | 2016-06-03 | 2016-08-10 | 哈尔滨东安发动机（集团）有限公司 | Manufacturing method for titanium alloy gear |
| CN105839044B (en) * | 2016-06-03 | 2020-12-22 | 哈尔滨东安发动机（集团）有限公司 | Manufacturing method of titanium alloy gear |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130213 |