CN102220553A - Nitride salt for low temperature salt bath nitriding of stainless steel - Google Patents
Nitride salt for low temperature salt bath nitriding of stainless steel Download PDFInfo
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- CN102220553A CN102220553A CN 201110184878 CN201110184878A CN102220553A CN 102220553 A CN102220553 A CN 102220553A CN 201110184878 CN201110184878 CN 201110184878 CN 201110184878 A CN201110184878 A CN 201110184878A CN 102220553 A CN102220553 A CN 102220553A
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- salt
- stainless steel
- low temperature
- nitride
- bath nitriding
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Abstract
The invention discloses nitride salt for low temperature salt bath nitriding of austenitic stainless steel. The nitride salt consists of the following components in percentage by weight: 1%-55% of KCNO, 1%-55% of NaCNO, 35%-15% of K2CO, 33%-15% of Na2CO, 33%-15% of Li2CO, 5%-15% of NaCl, 5%-15% of KCl and 40.1%-2% of Na2SO. In the invention, the temperature of the common salt bath nitriding is lowered and the using temperature of the currently known nitride salt is enlarged. In addition, the nitride salt has the advantages that the deformation of the processed workpiece is very small, the equipment is simple, the pollution-free work is realized and the like.
Description
Technical field
The present invention relates to a kind of nitridation salt that stainless steel low temperature salt-bath nitridation process is handled that is applied to.
Background technology
Salt bath nitriding art breading 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 compound layer and the diffusion layer of iron at workpiece surface, thereby improve wear resistance, erosion resistance and the fatigue resistance of iron.Therefore salt bath nitriding is widely used in the production practice.But be applied to stainless salt bath nitriding treatment technology at present and have following shortcoming: nitriding base salt Applicable temperature is higher, generally between 520 ~ 600 ℃, is not suitable for subzero treatment.
Summary of the invention
The purpose of invention is higher in order to overcome in the present stainless steel salt bath nitriding technological process nitriding base salt Applicable temperature, and providing a kind of can carry out the nitridation salt that the low temperature salt-bath nitridation process is handled to stainless steel.
The object of the present invention is achieved like this: a kind of nitridation salt that is used for the low temperature salt-bath nitriding is grouped into by following one-tenth by weight percentage: be grouped into by following one-tenth by weight percentage: KCNO 1% ~ 55%, and NaCNO 1% ~ 55%, K
2CO
35% ~ 15%, Na
2CO
33% ~ 15%, Li
2CO
33% ~ 15%, NaCl 5% ~ 15%, and KCl 5% ~ 15%.Na
2SO
4?0.1%~2%。
The technical solution used in the present invention is: optimized the prescription of salt bath nitriding base salt, added and can improve the active basic ingredient Li of salt
2CO
3, reduced the nitriding temperature of salt bath nitriding.Reaction principle in use of the present invention:
Cyanate radical decomposes provides activated nitrogen atom 4CNO
-→ CO
3 2-+ 2CN
-+ CO+2[N]
Nitrogenizing reaction Fe in the nitridation process+[N] → Fe
3N
Cyanogen velamen oxidisability composition oxidation CN
-+ [O] → CNO
-
Wherein cyanate provides cyanic acid ion; Li
2CO
3Can improve the active and mobile of nitridation salt, promote nitriding; And K
2CO
3, Na
2CO
3And chlorate be used the fusing point that then can effectively reduce nitridation salt, widen the Applicable temperature scope of nitridation salt.In working order down, cyanic acid ion decomposes the activated nitrogen atom that produces and infiltrates the iron surface, forms the iron nitride of hard and compact at material surface.Thereby improve wear resistance, solidity to corrosion and the fatigue resistance of material.
Batching is mixed each component then in proportion, puts into crucible 450 ℃ of fusings.Promptly make a kind of nitridation salt that is used for the low temperature salt-bath nitriding of the present invention after the fusing.
Introduced activating component in the nitridation salt of the present invention, made salt under the lesser temps state, can keep certain nitrogen gesture, thereby the Applicable temperature scope of nitridation salt is reduced to about 450 ℃.With austenitic stainless steel 321 steel is example, handles with nitridation salt of the present invention, can obtain the compound layer about 10 μ m, and the workpiece wear-corrosion resistance of handling is good.
Description of drawings
Fig. 1 is metallographic photo figure as a result.
Embodiment
Embodiment 1
Present embodiment 1 nitridation salt is grouped into by following one-tenth by weight percentage: KCNO 20%, NaCNO30%, K
2CO
313%, Na
2CO
36.5%, Li
2CO
36%, NaCl 12%, and KCl 12%, Na
2SO
40.5%.Present embodiment 1 is applicable under 450 ℃ of nitriding process conditions and uses, nitrogenize salt bath ambient stable.Austenitic stainless steel 321 steel nitrogenize metallographic results as shown in Figure 1.
Claims (2)
1. nitridation salt that is used for the nitriding of stainless steel low temperature salt-bath, be grouped into by following one-tenth by weight percentage: KCNO 1% ~ 55%, and NaCNO 1% ~ 55%, K
2CO
35% ~ 15%, Na
2CO
33% ~ 15%, Li
2CO
33% ~ 15%, NaCl 5% ~ 15%, and KCl 5% ~ 15%, Na
2SO
40.1% ~ 2%.
2. a kind of nitridation salt that is used for the nitriding of stainless steel low temperature salt-bath according to claim 1, it is characterized in that being grouped into by following one-tenth by weight percentage: KCNO 20%, NaCNO30%, K
2CO
313%, Na
2CO
36.5%, Li
2CO
36%, NaCl 12%, and KCl 12%, Na
2SO4 0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101848781A CN102220553B (en) | 2011-07-04 | 2011-07-04 | Nitride salt for low temperature salt bath nitriding of stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101848781A CN102220553B (en) | 2011-07-04 | 2011-07-04 | Nitride salt for low temperature salt bath nitriding of stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102220553A true CN102220553A (en) | 2011-10-19 |
| CN102220553B CN102220553B (en) | 2012-11-28 |
Family
ID=44777251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101848781A Expired - Fee Related CN102220553B (en) | 2011-07-04 | 2011-07-04 | Nitride salt for low temperature salt bath nitriding of stainless steel |
Country Status (1)
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409285A (en) * | 2011-11-25 | 2012-04-11 | 江苏海纳机电集团有限公司 | Low-temperature salt bath hardening treatment method for austenitic stainless steel |
| CN102943234A (en) * | 2012-11-20 | 2013-02-27 | 四川大学 | Low-temperature salt bath nitriding process for Austenitic stainless steel workpiece |
| CN102978564A (en) * | 2012-12-14 | 2013-03-20 | 四川大学 | Nitride for Ni-based alloy low-temperature salt bath nitriding |
| CN103031513A (en) * | 2013-01-14 | 2013-04-10 | 四川大学 | Low-temperature salt bath nitriding process for aluminum alloy hot-extrusion die steel |
| CN103074574A (en) * | 2012-12-14 | 2013-05-01 | 四川大学 | Low temperature salt-bath nitridation technology of Ni-based alloy workpiece |
| CN107130205A (en) * | 2017-05-03 | 2017-09-05 | 成都晟翔科技有限公司 | It is a kind of for environment-friendly type regeneration salt of QPQ techniques and its preparation method and application |
| CN108342681A (en) * | 2018-02-02 | 2018-07-31 | 成都晟翔科技有限公司 | A kind of environment-friendly type nitridation salt and its preparation method and application for QPQ techniques |
| CN114458584A (en) * | 2022-02-17 | 2022-05-10 | 西华大学 | Diaphragm with surface compressive stress and preparation method and application thereof |
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| CN101492806A (en) * | 2009-03-06 | 2009-07-29 | 王明泉 | Ultra-low temperature nitridation method for engine cylinder liner of large-scale watercraft |
| CN101831604A (en) * | 2010-06-01 | 2010-09-15 | 成都伍田机械技术有限责任公司 | Nitride salt for bath nitriding |
| CN101871087A (en) * | 2009-04-21 | 2010-10-27 | 上海江凯金属表面处理技术有限公司 | Salt bath formula for treating high-speed steel air conditioning compressor blade by salt bath nitriding treatment and treatment method |
| CN101871088A (en) * | 2009-04-21 | 2010-10-27 | 上海江凯金属表面处理技术有限公司 | Salt bath formula for treating stainless air conditioning compressor blade by salt bath nitriding treatment and treatment method |
| CN101906607A (en) * | 2009-06-04 | 2010-12-08 | 台州市百达制冷有限公司 | Liquid tufftriding method of 9Cr18 or 9Cr18Mo stainless steel slip sheet (or blade) |
-
2011
- 2011-07-04 CN CN2011101848781A patent/CN102220553B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492806A (en) * | 2009-03-06 | 2009-07-29 | 王明泉 | Ultra-low temperature nitridation method for engine cylinder liner of large-scale watercraft |
| CN101871087A (en) * | 2009-04-21 | 2010-10-27 | 上海江凯金属表面处理技术有限公司 | Salt bath formula for treating high-speed steel air conditioning compressor blade by salt bath nitriding treatment and treatment method |
| CN101871088A (en) * | 2009-04-21 | 2010-10-27 | 上海江凯金属表面处理技术有限公司 | Salt bath formula for treating stainless air conditioning compressor blade by salt bath nitriding treatment and treatment method |
| CN101906607A (en) * | 2009-06-04 | 2010-12-08 | 台州市百达制冷有限公司 | Liquid tufftriding method of 9Cr18 or 9Cr18Mo stainless steel slip sheet (or blade) |
| CN101831604A (en) * | 2010-06-01 | 2010-09-15 | 成都伍田机械技术有限责任公司 | Nitride salt for bath nitriding |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409285A (en) * | 2011-11-25 | 2012-04-11 | 江苏海纳机电集团有限公司 | Low-temperature salt bath hardening treatment method for austenitic stainless steel |
| CN102943234A (en) * | 2012-11-20 | 2013-02-27 | 四川大学 | Low-temperature salt bath nitriding process for Austenitic stainless steel workpiece |
| CN102978564A (en) * | 2012-12-14 | 2013-03-20 | 四川大学 | Nitride for Ni-based alloy low-temperature salt bath nitriding |
| CN103074574A (en) * | 2012-12-14 | 2013-05-01 | 四川大学 | Low temperature salt-bath nitridation technology of Ni-based alloy workpiece |
| CN103031513A (en) * | 2013-01-14 | 2013-04-10 | 四川大学 | Low-temperature salt bath nitriding process for aluminum alloy hot-extrusion die steel |
| CN107130205A (en) * | 2017-05-03 | 2017-09-05 | 成都晟翔科技有限公司 | It is a kind of for environment-friendly type regeneration salt of QPQ techniques and its preparation method and application |
| CN107130205B (en) * | 2017-05-03 | 2020-11-06 | 成都晟翔科技有限公司 | Environment-friendly regenerated salt for QPQ process and preparation method and application thereof |
| CN108342681A (en) * | 2018-02-02 | 2018-07-31 | 成都晟翔科技有限公司 | A kind of environment-friendly type nitridation salt and its preparation method and application for QPQ techniques |
| CN114458584A (en) * | 2022-02-17 | 2022-05-10 | 西华大学 | Diaphragm with surface compressive stress and preparation method and application thereof |
| CN114458584B (en) * | 2022-02-17 | 2024-01-19 | 西华大学 | Diaphragm with surface compressive stress and preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN102220553B (en) | 2012-11-28 |
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