CN100462472C - Gaseous sulphur nitrogen conitriding process - Google Patents
Gaseous sulphur nitrogen conitriding process Download PDFInfo
- Publication number
- CN100462472C CN100462472C CNB2006101350116A CN200610135011A CN100462472C CN 100462472 C CN100462472 C CN 100462472C CN B2006101350116 A CNB2006101350116 A CN B2006101350116A CN 200610135011 A CN200610135011 A CN 200610135011A CN 100462472 C CN100462472 C CN 100462472C
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- Prior art keywords
- stove
- ammonia
- thiocarbamide
- ethanol
- mixing solutions
- 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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- 238000000034 method Methods 0.000 title claims abstract description 14
- PFRUBEOIWWEFOL-UHFFFAOYSA-N [N].[S] Chemical compound [N].[S] PFRUBEOIWWEFOL-UHFFFAOYSA-N 0.000 title claims description 19
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 86
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 65
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 43
- 238000005121 nitriding Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 50
- 229960004756 ethanol Drugs 0.000 claims description 23
- 239000002253 acid Substances 0.000 claims description 18
- 230000001476 alcoholic effect Effects 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 16
- 238000010494 dissociation reaction Methods 0.000 claims description 16
- 230000005593 dissociations Effects 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 11
- 238000013022 venting Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 abstract 2
- 239000000243 solution Substances 0.000 description 13
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 229910000851 Alloy steel Inorganic materials 0.000 description 6
- 238000013019 agitation Methods 0.000 description 5
- 238000010790 dilution Methods 0.000 description 5
- 239000012895 dilution Substances 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The gaseous S and N penetrating process includes the following steps: heating to 500-600 deg.c; exhausting and dropping anhydrous alcohol in 10-50 g/min into the furnace until igniting in the exhaust port before setting workpiece; nitriding through introducing ammonia for 2-4 hr to decomposing the ammonia decomposing rage at 25-45 % and adding alcohol in 3-10g /min; co-penetrating through dropping S in 3-10 g/min and controlling ammonia decomposing rage at 25-45 % for other 2-4 hr; and lowering the temperature to below 450 deg.c via adding anhydrous alcohol in 3-10 g/min and before taking out the workpiece. The present invention has high penetrating speed, low power consumption, low cost, no pollution and other advantages.
Description
Technical field
The present invention relates to a kind of co-infiltration method, relate in particular to a kind of gas sulfur-nitrogen co-cementing method, belong to piece surface thermal treatment field.
Background technology
Part can strengthen wear-resisting and resistance to corrosion after carrying out the sulfur-nitrogen co-cementing processing.At present, main salt bath and the glow ion nitriding stove of adopting carries out sulfur-nitrogen co-cementing in the industrial production.But when adopting salt bath to carry out sulfur-nitrogen co-cementing, not only infiltration rate is slow, and big energy-consuming, and the residual a large amount of salt of meeting after oozing altogether also need salt is further handled, and operation is loaded down with trivial details, and is time-consuming.Other has the glow ion nitriding of employing stove to carry out sulfur-nitrogen co-cementing, though improved efficient, cost cost height has increased economical load.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, through studying intensively, design a kind of gas sulfur-nitrogen co-cementing method, it is slow to have solved in the prior art infiltration rate, big energy-consuming, time-consuming, problem that cost is high; And suitability of the present invention is strong, pollution-free.
To achieve these goals, technical scheme of the present invention is as follows:
The present invention is made up of following step:
Heat up: temperature in the stove of nitriding furnace is risen to the 500-600 degree;
Exhaust: the back of heating up splashes into dehydrated alcohol by 10-50g/min in stove, to the workpiece of packing into till venting port is lighted;
Nitrogenize: in stove, fed ammonia 2-4 hour, control ammonia dissociation rate between 25-45%, ethanol 3-10g/min;
Ooze the phase altogether: after ethanol stops, splashing into thiocarbamide and alcoholic acid mixing solutions 3-10g/min, control ammonia dissociation rate 25-45% when feeding ammonia, 2-4 hour;
Cooling is come out of the stove: after ammonia, thiocarbamide and alcoholic acid mixing solutions stop simultaneously, splash into dehydrated alcohol 3-10g/min in stove, temperature is come out of the stove below reducing to 450 degree.
Described oozing altogether in the phase step, thiocarbamide that splashes into and alcoholic acid mixing solutions are: thiocarbamide: ethanol=2:1.
Advantageous effect of the present invention is as follows:
Infiltration rate of the present invention is fast, and low, the labor-saving and time-saving of consuming energy, cost are low; And the equipment that adopts is simple, suitability is strong, pollution-free.Be applicable to various steel and steel alloy, through behind the sulfur-nitrogen co-cementing, have the advantage of nitriding and sulfurizing concurrently, the sulfide of the about 10 μ m of layer surface can reduce the rubbing factor of part, anti-killing; And the nitride of hardness higher (more than the HV550) time top layer is outstanding, has improved wear resistance, and the obnoxious flavour of generation burns with venting port, can not pollute environment.
Embodiment
Laboratory test results of the present invention is as follows:
Motor rockshaft, material are 45 steel, ooze temperature 570 degree altogether, ooze compound layer 15 μ m, main diffusion layer 200-350 μ m, compound layer maximum hardness 680-750H altogether 6 hours
V, sulphur content 0.8-1.3% does not have thermal treatment in advance.Engine pedestal experiment 720 hours 14
40 rev/mins, abrasion loss 2-3 μ m improves 3-5 times than high-frequency quenching weighshaft wear resistance, surperficial no marking damage.
Taper shank twist drill, material is 9SiCr, ooze temperature 570 degree altogether, oozed compound layer 12 μ m, main diffusion layer 180-300 μ m altogether 5 hours, compound layer maximum hardness 800HV, sulphur content 0.8-1.2% without boring 20 slice clutch sheets behind sharpening of drill bit of crossing sulfur-nitrogen co-cementing, once can be bored 40-50 efficient through the drill bit behind the sulfur-nitrogen co-cementing and improve more than 2 times.
Below, be described in detail as follows to technical scheme of the present invention by specific embodiment;
Embodiment 1
A kind of gas sulfur-nitrogen co-cementing of the present invention method is made up of following step:
Heat up: temperature in the stove of nitriding furnace is risen to 500 degree;
Exhaust: the back of heating up splashes into dehydrated alcohol by 10g/min in stove, to the workpiece of packing into till venting port is lighted;
Nitrogenize: in stove, fed ammonia 2 hours, control ammonia dissociation rate 25%, ethanol 3g/min;
Ooze the phase altogether: after ethanol stops, splashing into thiocarbamide and alcoholic acid mixing solutions (thiocarbamide is pressed the 2:1 dilution with ethanol) 3g/min, control ammonia dissociation rate when feeding ammonia 25%, 2 hour;
Cooling is come out of the stove: after ammonia, thiocarbamide and alcoholic acid mixing solutions stop simultaneously, splash into dehydrated alcohol 3g/min in stove, temperature is come out of the stove below reducing to 450 degree.
Equipment is that common standard 65KW nitriding furnace installs three instillators of stainless steel additional, and agitation fan is installed in the stove, is applicable to various steel and steel alloy.
Embodiment 2
A kind of gas sulfur-nitrogen co-cementing of the present invention method is made up of following step:
Heat up: temperature in the stove of nitriding furnace is risen to 600 degree;
Exhaust: the back of heating up splashes into dehydrated alcohol by 50g/min in stove, to the workpiece of packing into till venting port is lighted;
Nitrogenize: in stove, fed ammonia 4 hours, control ammonia dissociation rate 45%, ethanol 10g/min;
Ooze the phase altogether: after ethanol stops, splashing into thiocarbamide and alcoholic acid mixing solutions (thiocarbamide is pressed the 2:1 dilution with ethanol) 10g/min, control ammonia dissociation rate when feeding ammonia 45%, 4 hour;
Cooling is come out of the stove: after ammonia, thiocarbamide and alcoholic acid mixing solutions stop simultaneously, splash into dehydrated alcohol 10g/min in stove, temperature is come out of the stove below reducing to 450 degree.
Equipment is that common standard 65KW nitriding furnace installs three instillators of stainless steel additional, and agitation fan is installed in the stove, is applicable to various steel and steel alloy.
Embodiment 3
A kind of gas sulfur-nitrogen co-cementing of the present invention method is made up of following step:
Heat up: temperature in the stove of nitriding furnace is risen to 550 degree;
Exhaust: the back of heating up splashes into dehydrated alcohol by 30g/min in stove, to the workpiece of packing into till venting port is lighted;
Nitrogenize: in stove, fed ammonia 3 hours, control ammonia dissociation rate 35%, ethanol 6g/min;
Ooze the phase altogether: after ethanol stops, splashing into thiocarbamide and alcoholic acid mixing solutions (thiocarbamide is pressed the 2:1 dilution with ethanol) 7g/min, control ammonia dissociation rate when feeding ammonia 35%, 3 hour;
Cooling is come out of the stove: after ammonia, thiocarbamide and alcoholic acid mixing solutions stop simultaneously, splash into dehydrated alcohol 6.5g/min in stove, temperature is come out of the stove below reducing to 450 degree.
Equipment is that common standard 65KW nitriding furnace installs three instillators of stainless steel additional, and agitation fan is installed in the stove, is applicable to various steel and steel alloy.
Embodiment 4
A kind of gas sulfur-nitrogen co-cementing of the present invention method is made up of following step:
Heat up: temperature in the stove of nitriding furnace is risen to 600 degree;
Exhaust: the back of heating up splashes into dehydrated alcohol by 10g/min in stove, to the workpiece of packing into till venting port is lighted;
Nitrogenize: in stove, fed ammonia 2 hours, control ammonia dissociation rate between 25-45%, ethanol 10g/min;
Ooze the phase altogether: after ethanol stops, splashing into thiocarbamide and alcoholic acid mixing solutions (thiocarbamide is pressed the 2:1 dilution with ethanol) 3g/min, control ammonia dissociation rate when feeding ammonia 25-45%, 3 hours;
Cooling is come out of the stove: after ammonia, thiocarbamide and alcoholic acid mixing solutions stop simultaneously, splash into dehydrated alcohol 3g/min in stove, temperature is come out of the stove below reducing to 450 degree.
Equipment is that common standard 65KW nitriding furnace installs three instillators of stainless steel additional, and agitation fan is installed in the stove, is applicable to various steel and steel alloy.
Embodiment 5
A kind of gas sulfur-nitrogen co-cementing of the present invention method is made up of following step:
Heat up: temperature in the stove of nitriding furnace is risen to 570 degree;
Exhaust: the back of heating up splashes into dehydrated alcohol by 20g/min in stove, to the workpiece of packing into till venting port is lighted;
Nitrogenize: in stove, fed ammonia 3 hours, control ammonia dissociation rate at 25-45%, ethanol 8g/min;
Ooze the phase altogether: after ethanol stops, splashing into thiocarbamide and alcoholic acid mixing solutions (thiocarbamide is pressed the 2:1 dilution with ethanol) 8g/min, control ammonia dissociation rate 25-45% when feeding ammonia, 3 hours;
Cooling is come out of the stove: after ammonia, thiocarbamide and alcoholic acid mixing solutions stop simultaneously, splash into dehydrated alcohol 8g/min in stove, temperature is come out of the stove below reducing to 450 degree.
Equipment is that common standard 65KW nitriding furnace installs three instillators of stainless steel additional, and agitation fan is installed in the stove, is applicable to various steel and steel alloy.
Claims (3)
1. gas sulfur-nitrogen co-cementing method is characterized in that being made up of following step:
Heat up: temperature in the stove of nitriding furnace is risen to the 500-600 degree;
Exhaust: the back of heating up splashes into dehydrated alcohol by 10-50g/min in stove, to the workpiece of packing into till venting port is lighted;
Nitrogenize: in stove, fed ammonia 2-4 hour, control ammonia dissociation rate between 25-45%, ethanol 3-10g/min;
Ooze the phase altogether: after ethanol stops, splashing into thiocarbamide and alcoholic acid mixing solutions 3-10g/min, control ammonia dissociation rate 25-45% when feeding ammonia, 2-4 hour;
Cooling is come out of the stove: after ammonia, thiocarbamide and alcoholic acid mixing solutions stop simultaneously, splash into dehydrated alcohol 3-10g/min in stove, temperature is come out of the stove below reducing to 450 degree.
2. a kind of gas sulfur-nitrogen co-cementing method according to claim 1 is characterized in that being made up of following step:
Heat up: temperature in the stove of nitriding furnace is risen to 570 degree;
Exhaust: the back of heating up splashes into dehydrated alcohol by 20g/min in stove, to the workpiece of packing into till venting port is lighted;
Nitrogenize: in stove, fed ammonia 3 hours, control ammonia dissociation rate at 25-45%, ethanol 8g/min;
Ooze the phase altogether: after ethanol stops, splashing into thiocarbamide and alcoholic acid mixing solutions 8g/min, control ammonia dissociation rate 25-45% when feeding ammonia, 3 hours;
Cooling is come out of the stove: after ammonia, thiocarbamide and alcoholic acid mixing solutions stop simultaneously, splash into dehydrated alcohol 8g/min in stove, temperature is come out of the stove below reducing to 450 degree.
3. a kind of gas sulfur-nitrogen co-cementing method according to claim 1 and 2 is characterized in that described oozing altogether in the phase step, and thiocarbamide that splashes into and alcoholic acid mixing solutions are: thiocarbamide: ethanol=2:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101350116A CN100462472C (en) | 2006-12-22 | 2006-12-22 | Gaseous sulphur nitrogen conitriding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101350116A CN100462472C (en) | 2006-12-22 | 2006-12-22 | Gaseous sulphur nitrogen conitriding process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN100999810A CN100999810A (en) | 2007-07-18 |
| CN100462472C true CN100462472C (en) | 2009-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101350116A Active CN100462472C (en) | 2006-12-22 | 2006-12-22 | Gaseous sulphur nitrogen conitriding process |
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| CN103981482B (en) * | 2014-05-05 | 2016-08-24 | 福建省南平铝业股份有限公司 | A kind of the Aluminum-Extruding Die surface toughening processes technique |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039155A (en) * | 1983-08-12 | 1985-02-28 | Tokyo Netsu Shiyori Kogyo Kk | Gas sulfurizing and nitriding method |
| EP0464799A1 (en) * | 1990-07-05 | 1992-01-08 | Hitachi Construction Machinery Co., Ltd. | Sliding member and method for producing the same by gas sulphonitriding |
| CN1163320A (en) * | 1996-04-22 | 1997-10-29 | 山东工业大学 | Method for sulfur-nitrogen Co-cementing |
| JPH10306364A (en) * | 1994-05-25 | 1998-11-17 | Nippon Techno:Kk | Gas nitrosulphurizing method and device |
| JP2000239824A (en) * | 1999-02-25 | 2000-09-05 | Oriental Engineering Kk | Gas nitrosulphurizing method |
| JP2001158955A (en) * | 1999-12-03 | 2001-06-12 | Nippon Techno:Kk | Method for sulfurizing and quenching treatment, sulfurizing and carburizing treatment, and sulfurizing and carbonitriding treatment |
| CN1699618A (en) * | 2005-05-27 | 2005-11-23 | 上海大学 | Process for surface treatment of automobile engine gudgeon pins |
-
2006
- 2006-12-22 CN CNB2006101350116A patent/CN100462472C/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039155A (en) * | 1983-08-12 | 1985-02-28 | Tokyo Netsu Shiyori Kogyo Kk | Gas sulfurizing and nitriding method |
| EP0464799A1 (en) * | 1990-07-05 | 1992-01-08 | Hitachi Construction Machinery Co., Ltd. | Sliding member and method for producing the same by gas sulphonitriding |
| JPH10306364A (en) * | 1994-05-25 | 1998-11-17 | Nippon Techno:Kk | Gas nitrosulphurizing method and device |
| CN1163320A (en) * | 1996-04-22 | 1997-10-29 | 山东工业大学 | Method for sulfur-nitrogen Co-cementing |
| JP2000239824A (en) * | 1999-02-25 | 2000-09-05 | Oriental Engineering Kk | Gas nitrosulphurizing method |
| JP2001158955A (en) * | 1999-12-03 | 2001-06-12 | Nippon Techno:Kk | Method for sulfurizing and quenching treatment, sulfurizing and carburizing treatment, and sulfurizing and carbonitriding treatment |
| CN1699618A (en) * | 2005-05-27 | 2005-11-23 | 上海大学 | Process for surface treatment of automobile engine gudgeon pins |
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| Publication number | Publication date |
|---|---|
| CN100999810A (en) | 2007-07-18 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20070718 Assignee: Tieling Xinlong Machinery Manufacturing Co., Ltd. Assignor: Liu Yang Contract record no.: 2013210000030 Denomination of invention: Gaseous sulphur nitrogen conitriding process Granted publication date: 20090218 License type: Exclusive License Record date: 20130412 |
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Effective date of registration: 20170929 Address after: 112000 new town, Tieling County, Tieling, Liaoning Patentee after: Tieling Xinlong Machinery Manufacturing Co., Ltd. Address before: Xintaizi town 112000 Liaoning County of Tieling province Tieling Xinlong Machinery Manufacturing Co., Ltd. Patentee before: Liu Yang |
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