CN104099558A - Gas deep carburizing method for stainless steel - Google Patents
Gas deep carburizing method for stainless steel Download PDFInfo
- Publication number
- CN104099558A CN104099558A CN201310129244.5A CN201310129244A CN104099558A CN 104099558 A CN104099558 A CN 104099558A CN 201310129244 A CN201310129244 A CN 201310129244A CN 104099558 A CN104099558 A CN 104099558A
- Authority
- CN
- China
- Prior art keywords
- carburizing
- feed rate
- liter
- ammonia
- hour
- 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
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
A disclosed gas deep carburizing method for stainless steel is characterized by comprising: employing a 1Cr17Ni2 stainless steel material to make a part, cleaning the part, and removing a passive film; putting the part into a well-type carburizing furnace added with a carburizing agent toluene and a carburizing catalyst ammonia gas, performing carburizing processing by dividing into three stages, and after carburizing is finished, performing oil cooling on the part. The carburizing technology is low in carburizing temperature, the depth of a carburized layer reaches 0.75 mm or more, the surface of a carburized stainless steel part has no cracks, and the hardness of the carburized layer of the part subjected to quenching reaches 63 HRC or more.
Description
Technical field
The present invention relates to a kind of stainless steel gas Deep Carburization Process method, belong to stainless steel cementation Technology field.
Background technology
Carburization process is widely used in ferrous materials, it is to infiltrate carbon atom at steel material surface, improve the carbon content on ferrous materials top layer, thereby a kind of chemical heat treatment method that improves steel object surface hardness, wear resistance and fatigue strength, this treatment process is used in soft steel and low alloy steel part conventionally.And 1Cr17Ni2 material belongs to Martensite Stainless Steel, this material chrome content is high, and contain nickel, piece surface very easily forms the passive film of one deck densification, and the powerful combination of chromium and carbon in cementation process, slowed down carbon in austenitic diffusion, and depth of penetration is darker, the higher and carburizing time of the temperature requirement of its carburizing requires longer.In addition, 1Cr17Ni2 material hardening capacity is better, austenitizing temperature higher (980-1030 ℃), and the stress producing in the process of cooling after carburizing is larger, easily cracks.Therefore for the carburization process of 1Cr17Ni2 material, domestic research is less.
?
Summary of the invention
The object of the invention is to, a kind of 1Cr17Ni2 material stainless steel gas Deep Carburization Process method is provided.Carburizing temperature is low, the material surface flawless after carburizing.
Technical scheme of the present invention.Stainless steel gas Deep Carburization Process method, comprises the steps,
A, adopt 1Cr17Ni2 stainless material to make part, by Cleaning of Parts, then remove the passive film of piece surface;
B, pit carburizing furnace is warming up to 870-890 ℃, adds carburizing agent toluene and energizer ammonia, toluene feed rate 30-40 drips/minute (every 200 toluene are equivalent to 5.5-6.5mL), ammonia feed rate 5-6.5 liter/min, and service time is 0.5-1.5 hour;
C, part is packed in pit carburizing furnace, only supply ammonia, ammonia feed rate 7.5-8.5 liter/min, when cementing furnace furnace temperature reaches after 870-890 ℃, carries out carburizing:
First stage: furnace temperature 870-890 ℃, insulation 0.5-1 hour, ammonia feed rate 5-6.5 liter/min;
Subordinate phase: furnace temperature 870-890 ℃, insulation 0.5-1 hour, ammonia feed rate 5-6.5 liter/min, toluene feed rate 20-30 drips/minute;
Phase III: furnace temperature 900-920 ℃, insulation 30-45 hour, ammonia feed rate 5-6.5 liter/min, toluene feed rate 70-80 drips/minute;
After carburizing finishes, part is carried out to oil cooling.
Above-mentioned stainless steel gas Deep Carburization Process method, comprises the steps,
A, adopt 1Cr17Ni2 stainless material to make part, by Cleaning of Parts, then remove the passive film of piece surface;
B, pit carburizing furnace being warming up to 880 ℃, adding carburizing agent toluene and energizer ammonia, toluene feed rate 30-40 drips/minute, ammonia feed rate 5.5-6.0 liter/min, service time is 0.5-1.5 hour;
C, part is packed in pit carburizing furnace, only supply ammonia, ammonia feed rate 7.5-8.5 liter/min, when cementing furnace furnace temperature reaches after 880 ℃, carries out carburizing:
First stage: 880 ℃ of furnace temperature, insulation 0.5-1 hour, ammonia feed rate 5.5-6.0 liter/min;
Subordinate phase: 880 ℃ of furnace temperature, insulation 0.5-1 hour, ammonia feed rate 5.5-6.0 liter/min, toluene feed rate 20-30 drips/minute;
Phase III: 910 ℃ of furnace temperature, insulation 30-45 hour, ammonia feed rate 5.5-6.0 liter/min, toluene feed rate 70-80 drips/minute;
After carburizing finishes, part is carried out to oil cooling.
1Cr17Ni2 stainless material carburization process of the present invention, carburizing temperature is low, more than depth of penetration can reach 0.75mm, and the steel piece surface flawless after carburizing, more than carburized layer hardness can reach 63HRC after parts quenching, effectively solved the difficult point of 1Cr17Ni2 stainless material carburization process.With existing carburization process, compare, method characteristic of the present invention is to reduce carburizing temperature reduces the thermal stresses producing in process of cooling, adopts oil cooling to accelerate speed of cooling, reduces the stress that in process of cooling, structural transformation produces, the generation of Crack prevention.Carburizing temperature be chosen in 900-920 ℃ best, the too low infiltration rate of carburizing temperature is slower, cause carburizing soaking time long, the thermal stresses producing in the too high process of cooling of carburizing temperature cracks (probability that carburizing crackle produces when carburizing temperature is greater than 940 ℃ increases greatly) compared with great Yi.
Applicant has carried out series of experiments to carburization process of the present invention, and test parameter and effect are as follows:
Experiment one
Carburization process, processing parameter is as shown in table 1 below:
Table 1 experiment one carburizing process parameters
Implementation result
Depth of penetration: 0.80mm, the hardness after quenching: 66 ~ 67HRC, specimen surface flawless.
Experiment two
Carburization process, processing parameter is as shown in table 2 below:
Table 2 experiment two carburizing process parameters
Implementation result
Depth of penetration: 0.81mm, the hardness after quenching: 66 ~ 67HRC, specimen surface flawless.
Experiment three
Carburization process, processing parameter is as shown in table 3 below:
Table 3 experiment three carburizing process parameters
Implementation result
Depth of penetration: 0.90mm, the hardness after quenching: 66 ~ 67HRC, specimen surface flawless.
By above 3 case study on implementation, can find out that this carburization process is reliable and stable, depth of penetration is all greater than 0.75mm, through quenching carburized layer hardness, is all greater than 63HRC.
Embodiment
Embodiments of the invention 1.Stainless steel gas Deep Carburization Process method, comprises the steps,
A, adopt 1Cr17Ni2 stainless material to make part, by Cleaning of Parts, then remove the passive film of piece surface;
B, pit carburizing furnace being warming up to 870-890 ℃, adding carburizing agent toluene and energizer ammonia, toluene feed rate 30-40 drips/minute, ammonia feed rate 5-6.5 liter/min, service time is 0.5-1.5 hour;
C, part is packed in pit carburizing furnace, only supply ammonia, ammonia feed rate 7.5-8.5 liter/min, when cementing furnace furnace temperature reaches after 870-890 ℃, carries out carburizing:
First stage: furnace temperature 870-890 ℃, insulation 0.5-1 hour, ammonia feed rate 5-6.5 liter/min;
Subordinate phase: furnace temperature 870-890 ℃, insulation 0.5-1 hour, ammonia feed rate 5-6.5 liter/min, toluene feed rate 20-30 drips/minute;
Phase III: furnace temperature 900-920 ℃, insulation 30-40 hour, ammonia feed rate 5-6.5 liter/min, toluene feed rate 70-80 drips/minute;
After carburizing finishes, part is carried out to oil cooling, oil cooling step is as follows:
Part after d, oil cooling carries out high tempering: temperature 720-730 ℃, and insulation 5-6 hour, is chilled to 400 ℃ of air coolings of coming out of the stove below with stove;
E, quenching: temperature 890-910 ℃, insulation: 40-60 minute, oil cooling.
Note: every 200 toluene are equivalent to 5.5-6.5mL.
Embodiments of the invention 2.Stainless steel gas Deep Carburization Process method, comprises the steps,
A, adopt 1Cr17Ni2 stainless material to make part, by Cleaning of Parts, then remove the passive film of piece surface;
B, pit carburizing furnace being warming up to 880 ℃, adding carburizing agent toluene and energizer ammonia, toluene feed rate 30-40 drips/minute, ammonia feed rate 5-6.5 liter/min, service time is 0.5-1.5 hour;
C, part is packed in pit carburizing furnace, only supply ammonia, ammonia feed rate 7.5-8.5 liter/min, when cementing furnace furnace temperature reaches after 880 ℃, carries out carburizing:
First stage: 880 ℃ of furnace temperature, insulation 0.5-1 hour, ammonia feed rate 5-6.5 liter/min;
Subordinate phase: 880 ℃ of furnace temperature, insulation 0.5-1 hour, ammonia feed rate 5-6.5 liter/min, toluene feed rate 20-30 drips/minute;
Phase III: 910 ℃ of furnace temperature, insulation 30-40 hour, ammonia feed rate 5-6.5 liter/min, toluene feed rate 70-80 drips/minute;
After carburizing finishes, part is carried out to oil cooling, oil cooling step is as follows:
Part after d, oil cooling carries out high tempering: 725 ℃ of temperature, and insulation 5-6 hour, is chilled to 400 ℃ of air coolings of coming out of the stove below with stove;
E, quenching: 900 ℃ of temperature, insulation: 40-60 minute, oil cooling.
Claims (2)
1. a stainless steel gas Deep Carburization Process method, is characterized in that: comprises the steps,
A, adopt 1Cr17Ni2 stainless material to make part, by Cleaning of Parts, then remove the passive film of piece surface;
B, pit carburizing furnace being warming up to 870-890 ℃, adding carburizing agent toluene and energizer ammonia, toluene feed rate 30-40 drips/minute, ammonia feed rate 5-6.5 liter/min, service time is 0.5-1.5 hour;
C, part is packed in pit carburizing furnace, only supply ammonia, ammonia feed rate 7.5-8.5 liter/min, when cementing furnace furnace temperature reaches after 870-890 ℃, carries out carburizing:
First stage: furnace temperature 870-890 ℃, insulation 0.5-1 hour, ammonia feed rate 5-6.5 liter/min;
Subordinate phase: furnace temperature 870-890 ℃, insulation 0.5-1 hour, ammonia feed rate 5-6.5 liter/min, toluene feed rate 20-30 drips/minute;
Phase III: furnace temperature 900-920 ℃, insulation 30-45 hour, ammonia feed rate 5-6.5 liter/min, toluene feed rate 70-80 drips/minute;
After carburizing finishes, part is carried out to oil cooling.
2. stainless steel gas Deep Carburization Process method according to claim 1, is characterized in that: comprises the steps,
A, adopt 1Cr17Ni2 stainless material to make part, by Cleaning of Parts, then remove the passive film of piece surface;
B, pit carburizing furnace being warming up to 880 ℃, adding carburizing agent toluene and energizer ammonia, toluene feed rate 30-40 drips/minute, ammonia feed rate 5.5-6.0 liter/min, service time is 0.5-1.5 hour;
C, part is packed in pit carburizing furnace, only supply ammonia, ammonia feed rate 7.5-8.5 liter/min, when cementing furnace furnace temperature reaches after 880 ℃, carries out carburizing:
First stage: 880 ℃ of furnace temperature, insulation 0.5-1 hour, ammonia feed rate 5.5-6.0 liter/min;
Subordinate phase: 880 ℃ of furnace temperature, insulation 0.5-1 hour, ammonia feed rate 5.5-6.0 liter/min, toluene feed rate 20-30 drips/minute;
Phase III: 910 ℃ of furnace temperature, insulation 30-45 hour, ammonia feed rate 5.5-6.0 liter/min, toluene feed rate 70-80 drips/minute;
After carburizing finishes, part is carried out to oil cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310129244.5A CN104099558A (en) | 2013-04-15 | 2013-04-15 | Gas deep carburizing method for stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310129244.5A CN104099558A (en) | 2013-04-15 | 2013-04-15 | Gas deep carburizing method for stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104099558A true CN104099558A (en) | 2014-10-15 |
Family
ID=51668091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310129244.5A Pending CN104099558A (en) | 2013-04-15 | 2013-04-15 | Gas deep carburizing method for stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104099558A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441863A (en) * | 2015-11-14 | 2016-03-30 | 芜湖天金机械有限公司 | Universal ball shell carburizing process capable of improving surface hardness |
| CN106637053A (en) * | 2016-12-21 | 2017-05-10 | 机械科学研究总院青岛分院 | Catalysis method of low-temperature carburization |
| CN106835005A (en) * | 2016-12-21 | 2017-06-13 | 机械科学研究总院青岛分院 | A kind of cryogenic gas method for carburizing of austenitic stainless steel |
| CN110656300A (en) * | 2019-10-17 | 2020-01-07 | 安徽恒明工程技术有限公司 | Carburizing process of DC53 steel |
| CN115572937A (en) * | 2022-10-28 | 2023-01-06 | 西安理工大学 | High-hardness antifriction steel wire ring and preparation method thereof |
-
2013
- 2013-04-15 CN CN201310129244.5A patent/CN104099558A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441863A (en) * | 2015-11-14 | 2016-03-30 | 芜湖天金机械有限公司 | Universal ball shell carburizing process capable of improving surface hardness |
| CN106637053A (en) * | 2016-12-21 | 2017-05-10 | 机械科学研究总院青岛分院 | Catalysis method of low-temperature carburization |
| CN106835005A (en) * | 2016-12-21 | 2017-06-13 | 机械科学研究总院青岛分院 | A kind of cryogenic gas method for carburizing of austenitic stainless steel |
| CN106835005B (en) * | 2016-12-21 | 2019-01-15 | 机械科学研究总院青岛分院有限公司 | A kind of cryogenic gas method for carburizing of austenitic stainless steel |
| CN106637053B (en) * | 2016-12-21 | 2019-03-05 | 机械科学研究总院青岛分院有限公司 | A kind of catalysis process of low temperature carburization |
| CN110656300A (en) * | 2019-10-17 | 2020-01-07 | 安徽恒明工程技术有限公司 | Carburizing process of DC53 steel |
| CN110656300B (en) * | 2019-10-17 | 2021-10-01 | 安徽绿能技术研究院有限公司 | Carburizing process of DC53 steel |
| CN115572937A (en) * | 2022-10-28 | 2023-01-06 | 西安理工大学 | High-hardness antifriction steel wire ring and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100590208C (en) | 42CrMoE heat treatment technique | |
| CN102392124B (en) | Heat treatment technology method for improving obdurability of high-speed steel | |
| CN100582253C (en) | Cast iron series mould material thermal treatment method capable of acquiring controllable and uniform rigidity | |
| CN104099558A (en) | Gas deep carburizing method for stainless steel | |
| RU2012134191A (en) | CARBONED STEEL ELEMENT AND METHOD FOR PRODUCING IT | |
| CN103993154A (en) | Thermal treatment method of alloy steel gear | |
| CN102899603A (en) | M50NiL material low-pressure vacuum carburization method | |
| CN105714236A (en) | Vacuum pulse carburizing method for martensitic stainless steel | |
| CN107245691B (en) | Surface strengthening method for metal material composite heat treatment | |
| CN105506539A (en) | Carburizing and quenching process of high-hardness micro carbide on surface of carburizing part | |
| CN103233101A (en) | GCr15 bearing steel heat treatment method | |
| CN111139345A (en) | Heat treatment method of steel | |
| CN112593183A (en) | Heat treatment method for carburizing and quenching | |
| CN102181613B (en) | Heat treatment method for large-scale Cr12Mov workpiece | |
| CN104498966A (en) | Process for tufftriding amino gas | |
| CN104213070B (en) | Sewing machine gear wheel carburization layer control technique | |
| CN113529009A (en) | Heat treatment method of boron steel, high-strength and high-toughness boron steel and application thereof | |
| CN106342098B (en) | 16Cr3NiWMoVNbE material deep layer cyaniding heat treatment method | |
| CN106756750B (en) | A kind of heat treatment method of 2Cr3WMoV material gear forgings | |
| JP2010222636A (en) | Surface treatment method of steel product | |
| US10202666B2 (en) | Process for treating steel alloys for gears | |
| CN103436686B (en) | Tempering technology of G18CrMo2-6 steel | |
| CN102080204A (en) | Heating processing technology of metal steel tube | |
| KR101738503B1 (en) | Method for heat treatment for reducing deformation of cold-work articles | |
| CN104481410A (en) | High-hardness wear-resistant rock drill manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141015 |