SU312896A1 - BATH FOR NITROCEMENT - Google Patents
BATH FOR NITROCEMENTInfo
- Publication number
- SU312896A1 SU312896A1 SU1213521A SU1213521A SU312896A1 SU 312896 A1 SU312896 A1 SU 312896A1 SU 1213521 A SU1213521 A SU 1213521A SU 1213521 A SU1213521 A SU 1213521A SU 312896 A1 SU312896 A1 SU 312896A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- bath
- silicon nitride
- potassium
- nitrogen
- nitrocement
- Prior art date
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N Silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 4
- 238000005256 carbonitriding Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 150000003841 chloride salts Chemical class 0.000 claims description 2
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims 1
- 150000001340 alkali metals Chemical class 0.000 claims 1
- 150000005323 carbonate salts Chemical class 0.000 claims 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- QDHHCQZDFGDHMP-UHFFFAOYSA-N monochloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000001187 sodium carbonate Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N Silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Description
Изобретение относитс к химико-термической обработке, в частности к нитроцементации металлов и сплавов в сол ных ваннах.The invention relates to chemical heat treatment, in particular, carbonitriding of metals and alloys in salt baths.
Известна ванна дл ннтроцементации, не содержаща цианистых солей, включает еледующие компоненты; углекислые и хлористые соли щелочных металлов, хлористый аммоний и карбид кремни .The known carbonization bath, which does not contain cyanic salts, includes the following components; alkali metal carbonate and chloride salts, ammonium chloride and silicon carbide.
В такой ванне при 850°С поверхностна зона сло обогащаетс азотом лищь до 0,08- 0,15%, цианированный слой при выдержке 15-30 мин имеет глубину 0,1-0,25 мм.In such a bath at 850 ° C, the surface zone of the layer is enriched with nitrogen up to 0.08-0.15%, the cyanated layer with a shutter speed of 15-30 min has a depth of 0.1-0.25 mm.
С целью повыщени концентрации азота в обрабатываемом слое, в предложенную ванну в качестве азотосодержащего компонента введен нитрид кремни . Ванна может иметь один из следующих составов, %:In order to increase the concentration of nitrogen in the treated layer, silicon nitride was introduced as a nitrogen-containing component into the proposed bath. Bath can have one of the following compositions,%:
углекислый натрий70-85sodium carbonate 70-85
хлористый натрий10-15sodium chloride 10-15
нитрид кремни 5-15silicon nitride 5-15
илиor
углекислый калий70-85potassium carbonate70-85
хлористый калий10-15potassium chloride 10-15
нитрид кремни 5-15silicon nitride 5-15
Введение нитрида кремни , который вл етс тугоплавким соединением и не диссоциирует при температуре процесса в отличие от хлористого аммони , обеспечивает насыщение поверхностного сло азотом до 0,1-0,6% (на рассто нии 0,025 мм от поверхности). Hacbiv The introduction of silicon nitride, which is a refractory compound and does not dissociate at a process temperature unlike ammonium chloride, provides for saturation of the surface layer with nitrogen to 0.1-0.6% (at a distance of 0.025 mm from the surface). Hacbiv
щение углеродом происходит за счет присутстви в ванне углекислого натри (или кали ).Carbon is caused by the presence of sodium carbonate (or potassium) in the bath.
Предложенна ванна обеспечивает следующие величины насыщени в зависимости от температуры процесса нитроцементации (дл ст. 40х и ЗОХГТ):The proposed bath provides the following saturation values, depending on the temperature of the carbonitriding process (for station 40x and ZOHCH):
Предмет изобретени Subject invention
Claims (3)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU312896A1 true SU312896A1 (en) |
Family
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