CN103074574A - Low temperature salt-bath nitridation technology of Ni-based alloy workpiece - Google Patents
Low temperature salt-bath nitridation technology of Ni-based alloy workpiece Download PDFInfo
- Publication number
- CN103074574A CN103074574A CN2012105398849A CN201210539884A CN103074574A CN 103074574 A CN103074574 A CN 103074574A CN 2012105398849 A CN2012105398849 A CN 2012105398849A CN 201210539884 A CN201210539884 A CN 201210539884A CN 103074574 A CN103074574 A CN 103074574A
- Authority
- CN
- China
- Prior art keywords
- salt
- bath
- workpiece
- base alloy
- nitrogenize
- 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.)
- Pending
Links
Images
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention relates to a low temperature salt-bath nitridation technology of an Ni-based alloy workpiece. The technology is characterized in that a nitridation salt for salt-bath nitridation is composed of 1-45wt% of KCNO, 1-35wt% of NaCNO, 5-20wt% of K2CO3, 5-15wt% of Na2CO3, 3-10wt% of Li2CO3, 5-25wt% of NaCl, and 5-20wt% of KCl. The low temperature salt-bath nitridation technology of the Ni-based alloy workpiece is characterized in that the technology comprises the steps of (1) cleaning, (2) drying preheating, (3) nitridation, (4) cooling, (5) cleaning and drying, and (6) polishing. The technology enables the hardness, the wear resistance, the fatigue resistance and the corrosion resistance of the Ni-based alloy surface to be obviously improved.
Description
Technical field
The present invention relates to a kind of Ni base alloy workpiece low temperature salt-bath nitriding process.
Background technology
The Salt-bath Nitriding Technology treatment technology is also referred to as the tufftride treatment technology, the activated nitrogen atom that utilizes the decomposition of cyanate radical and produce infiltrates workpiece, form the nitride layer of one deck densification at workpiece surface, thereby improve wear resistance, erosion resistance and the fatigue resistance of Ni base alloy workpiece, so salt-bath nitriding is widely used in the production practice.But less to Ni base alloy workpiece cryogenic nitrogen metallization processes both at home and abroad.
Summary of the invention
The purpose of invention is for a kind of Ni base alloy workpiece nitriding process is provided, can so that after the nitrogenize of a kind of Ni base alloy its wear resistance greatly improve and so that the low temperature nitridation treatment method that solidity to corrosion also improves.
The present invention relates to a kind of Ni base alloy workpiece low temperature salt-bath nitriding process, it is characterized in that being undertaken by following technical process:
Clean: Ni base alloy workpiece is placed in acetone or the alcohol medium, cleaned 15 minutes under 50 ℃ of left and right sides conditions with Ultrasonic Cleaners, to remove the workpiece surface greasy dirt;
Drying and forewarm: the Ni base alloy workpiece that cleans up is dried in dryer, and about 300 ℃, carry out preheating 25 minutes;
Nitrogenize: the nitridation salt of special-purpose Ni base alloy low temperature salt-bath nitrogenize is put into nitriding furnace, and be heated to it at 430 ℃-450 ℃ and melt fused solution, then preheated Ni base alloy workpiece is put into and carried out nitrogenize 120 ~ 1200 minutes, the temperature in the nitriding furnace remains on 430 ~ 450 ℃; The technique of described Ni base alloy low temperature salt-bath nitrogenize, it is characterized in that the nitridation salt of salt-bath nitriding is grouped into by following one-tenth by weight percentage: KCNO 1% ~ 45%, and NaCNO 1% ~ 35%, K
2CO
35% ~ 20%, Na
2CO
35% ~ 15%, Li
2CO
33% ~ 10%, La
2(CO
3)
30.1 ~ 5%, Ce
2(CO
3)
30.1 ~ 5%, NaCl 5% ~ 25%, KCl 5% ~ 20%, Na
2SO
40.1% ~ 3%, Na
2S 0.01-0.5%, K
2S 0.01-0.5%;
Cooling: after sample is come out of the stove, at room temperature be cooled to room temperature;
Clean and oven dry: after the cooling, with the salt of clear water flush away workpiece surface, and in dryer, dry with 80 ℃ of left and right sides temperature workpiece that nitrogenize is good;
Polishing: workpiece is polished at the vibrations polishing machine, remove the surface porosity layer.
The present invention adopts a kind of low temperature salt-bath nitriding process of Ni base alloy nitrogenize workpiece, uses specific nitridation salt, can effectively improve hardness, wear resistance, fatigue resistance and the solidity to corrosion on Ni base alloy workpiece surface.
Description of drawings
Fig. 1 be after the Inconel 718 alloy workpiece low temperature nitrogenize the cross section metallograph.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, process program of the present invention is specifically described.
Embodiment 1
Inconel 718 alloy workpieces are placed in the acetone, cleaned 15 minutes under 50 ℃ of left and right sides conditions with Ultrasonic Cleaners, remove the workpiece surface greasy dirt, then with clear water workpiece is cleaned; Workpiece is dried in dryer, be put in interior about 300 ℃ of stove after the oven dry and carried out preheating 25 minutes; Then add the nitridation salt that nitrogenize is used in nitriding furnace, it is characterized in that the nitridation salt of salt-bath nitriding is grouped into by following one-tenth by weight percentage: KCNO 30%, NaCNO30%, K
2CO
312%, Na
2CO
310%, Li
2CO
32%, La
2(CO
3)
30. 5%, Ce
2(CO
3)
30. 5%, NaCl 6%, KCl 7%, Na
2SO
41.5%, Na
2S 0.2%, K
2S 0.3%.Nitridation salt is heated to its melting in nitriding furnace liquid, then preheated workpiece put into crucible, and the temperature in the nitriding furnace remains on 450 ℃ of nitrogenize 1200 minutes, during also frequently pass into oxygen; After 1200 minutes, workpiece is taken out, and place air to be cooled to room temperature; Workpiece that then will cooling is in a large amount of cleanings; In dryer, dry polishing with 80 ℃ of left and right sides temperature workpiece that nitrogenize is good.Obtain Inconel 718 microstructure of the alloys under the opticmicroscope.
Claims (4)
1. Ni base alloy workpiece low temperature salt-bath nitriding process is characterized in that being undertaken by following technical process:
Clean: Ni base alloy workpiece is placed in acetone or the alcohol medium, cleaned 15 minutes under 50 ℃ of left and right sides conditions with Ultrasonic Cleaners, to remove the workpiece surface greasy dirt;
Drying and forewarm: the Ni base alloy workpiece that cleans up is dried in dryer, and about 300 ℃, carry out preheating 25 minutes;
Nitrogenize: the nitridation salt of special-purpose Ni base alloy low temperature salt-bath nitrogenize is put into nitriding furnace, and be heated to it at 430 ℃-450 ℃ and melt fused solution, then preheated Ni base alloy workpiece is put into and carried out nitrogenize 120 ~ 1200 minutes, the temperature in the nitriding furnace remains on 430 ~ 450 ℃;
Cooling: after sample is come out of the stove, at room temperature be cooled to room temperature;
Clean and oven dry: after the cooling, with the salt of clear water flush away workpiece surface, and in dryer, dry with 80 ℃ of left and right sides temperature workpiece that nitrogenize is good;
Polishing: workpiece is polished at the vibrations polishing machine, remove the surface porosity layer.
2. by the technique of Ni base alloy low temperature salt-bath claimed in claim 1 nitrogenize, it is characterized in that the nitridation salt of salt-bath nitriding is grouped into by following one-tenth by weight percentage: KCNO 1% ~ 45%, and NaCNO 1% ~ 35%, K
2CO
35% ~ 20%, Na
2CO
35% ~ 15%, Li
2CO
33% ~ 10%, La
2(CO
3)
30.1 ~ 5%, Ce
2(CO
3)
30.1 ~ 5%, NaCl 5% ~ 25%, KCl 5% ~ 20%, Na
2SO
40.1% ~ 3%, Na
2S 0.01-0.5%, K
2S 0.01-0.5%.
3. by the technique of Ni base alloy low temperature salt-bath claimed in claim 1 nitrogenize, it is characterized in that the nitridation salt of salt-bath nitriding is grouped into by following one-tenth by weight percentage: KCNO 30%, NaCNO30%, K
2CO
312%, Na
2CO
310%, Li
2CO
32%, La
2(CO
3)
30. 5%, Ce
2(CO
3)
30. 5%, NaCl 6%, KCl 7%, Na
2SO
41.5%, Na
2S 0.2%, K
2S 0.3%.
4. by the technique of Ni base alloy low temperature salt-bath claimed in claim 1 nitrogenize, it is characterized in that the temperature in the salt-bath nitriding Nitrogen During stove remains on 430 ~ 450 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105398849A CN103074574A (en) | 2012-12-14 | 2012-12-14 | Low temperature salt-bath nitridation technology of Ni-based alloy workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105398849A CN103074574A (en) | 2012-12-14 | 2012-12-14 | Low temperature salt-bath nitridation technology of Ni-based alloy workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103074574A true CN103074574A (en) | 2013-05-01 |
Family
ID=48151266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105398849A Pending CN103074574A (en) | 2012-12-14 | 2012-12-14 | Low temperature salt-bath nitridation technology of Ni-based alloy workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103074574A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0551702A1 (en) * | 1992-01-14 | 1993-07-21 | Daido Hoxan Inc. | Method of nitriding nickel alloy |
| CN1508282A (en) * | 2002-09-04 | 2004-06-30 | ͬ�Ϳ�ҵ��ʽ���� | Method for producing metal member with intensified corrosion-resisting property by salt-bath nitrizing |
| CN102220553A (en) * | 2011-07-04 | 2011-10-19 | 四川大学 | Nitride salt for low temperature salt bath nitriding of stainless steel |
| CN102392212A (en) * | 2011-11-15 | 2012-03-28 | 西华大学 | Low-temperature nitriding nitride salt |
-
2012
- 2012-12-14 CN CN2012105398849A patent/CN103074574A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0551702A1 (en) * | 1992-01-14 | 1993-07-21 | Daido Hoxan Inc. | Method of nitriding nickel alloy |
| CN1508282A (en) * | 2002-09-04 | 2004-06-30 | ͬ�Ϳ�ҵ��ʽ���� | Method for producing metal member with intensified corrosion-resisting property by salt-bath nitrizing |
| CN102220553A (en) * | 2011-07-04 | 2011-10-19 | 四川大学 | Nitride salt for low temperature salt bath nitriding of stainless steel |
| CN102392212A (en) * | 2011-11-15 | 2012-03-28 | 西华大学 | Low-temperature nitriding nitride salt |
Non-Patent Citations (1)
| Title |
|---|
| 罗德福 等: "QPQ处理对Inconel718镍基合金结构的影响", 《西华大学学报（自然科学版）》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102943234A (en) | Low-temperature salt bath nitriding process for Austenitic stainless steel workpiece | |
| CN106544494B (en) | A kind of online soft annealing method suitable for 1Cr17Ni2 stainless steel cold pull wires | |
| CN103114292A (en) | Laser-cladded oil well pipe subjected to multicomponent cementation compound treatment and production process and device | |
| CN104032116A (en) | Thermal treatment process of steel bevel gear | |
| CN103203390A (en) | Processing method for beta titanium alloy wires used for glass frames | |
| CN107267731A (en) | A kind of production technology for automobile exhaust system stainless steel tube | |
| CN105331926A (en) | N-C-Cr-V-RE multi-element co-diffusion material for 45 steel surface strengthening | |
| CN107699849B (en) | High-frequency induction hot-dip aluminizing process | |
| CN103103321A (en) | Isothermal quenching process | |
| CN111037060A (en) | Welding process for aluminum product processing | |
| CN104775089A (en) | Rapid salt-bath nitridation method by applying magnetic field | |
| CN104762587A (en) | A mold round-corner nitridation process | |
| CN103031513A (en) | Low-temperature salt bath nitriding process for aluminum alloy hot-extrusion die steel | |
| CN102260844A (en) | Surface processing method for coal mining mechanical parts | |
| CN205289116U (en) | Polycrystalline diamond compact belt cleaning device | |
| CN103074574A (en) | Low temperature salt-bath nitridation technology of Ni-based alloy workpiece | |
| CN101665929A (en) | High corrosion resistance plating solution of electroless Ni-P alloy plating and electroless plating method thereof | |
| CN203270017U (en) | Quick nitridation and carburization device of special pipefitting for oil tube and casing for petroleum | |
| CN104451097A (en) | Carburizing and quenching process for springs | |
| CN107059022A (en) | A kind of processing method of steel | |
| CN105838854A (en) | Heating quenching technology for spline shafts | |
| CN112058609A (en) | Metal heat treatment process capable of prolonging service life of metal product | |
| CN203065578U (en) | Oil well pipe of laser cladding multi-component thermochemical treatment composite treatment | |
| CN104831023A (en) | Thermal treatment technology for ball screws of machine tool | |
| CN105714058A (en) | Thermal treatment process for bearing steel gauge blocks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| 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: 20130501 |