CN102277581B - Heat treatment process of low-carbon alloy material - Google Patents
Heat treatment process of low-carbon alloy material Download PDFInfo
- Publication number
- CN102277581B CN102277581B CN 201110229837 CN201110229837A CN102277581B CN 102277581 B CN102277581 B CN 102277581B CN 201110229837 CN201110229837 CN 201110229837 CN 201110229837 A CN201110229837 A CN 201110229837A CN 102277581 B CN102277581 B CN 102277581B
- Authority
- CN
- China
- Prior art keywords
- treatment
- alloy material
- minutes
- workpiece
- sub
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a heat treatment process of a low-carbon alloy material, and the heat treatment process comprises the steps of carbonitriding treatment, quenching treatment, cryogenic treatment and tempering treatment. The low-carbon alloy material, in particular 12Cr2Ni4 alloy material after the treatment through the process can obtain the surface with higher hardness and the heart part with strong toughness, and under the condition of keeping the higher toughness in a workpiece, a surface layer with high hardness and high strength can be obtained, thereby improving the abrasion resistance and the strength of the workpiece and enabling the service life of the workpiece to be in a close relationship with the toughness of the surface layer and good matching of the strong toughness of the surface layer and the heart part. After adopting the cryogenic treatment, the service life can be well prolonged and the hardness and the strength of a matrix can be improved.
Description
Technical field
The invention belongs to the thermal treatment process technology field of metallic substance, especially belong to heat treatment process of low-carbon alloy material.
Background technology
The common technology of thermal treatment process comprises the technology methods such as carbonitriding, quenching, sub-zero treatment and tempering, particularly the recently sub-zero treatment of development to the processing of material after each characteristic further raising has been arranged.When metal at the thermal treatment stiffened to process of cooling, alloy wherein and carbon produce dissolving and combination and diffuse to form austenite (Austenite), when process of cooling, owing to producing compacting, low temperature forms martensite (Martensite), and because martensitic final transition point (Mf) is very low, therefore quench cooled is to the residual a large amount of austenites of room temperature meeting, thereby the hardness of reduction metal, wear resistance and work-ing life, simultaneously easily cause metal cracked because of austenitic high fragility, moreover, also have many physicalies particularly thermal characteristics and magnetic decline.
Because austenite reaches decomposition very built on the sand under low temperature environment, make the part of original defective micropore and stress concentration produce plastic flow and become structure refinement, therefore as long as metal is placed under the ultra-low temperature surroundings, austenite wherein can change into martensite, internal stress thereby elimination.When very low temperature since tissue volume shrink, Fe lattice parameter shrinking and strengthen the motivating force that carbon atom is separated out, so martensitic matrix is separated out a large amount of ultra tiny carbide, these ultra tiny xln can make the intensity of material improve, and increase simultaneously wear resistance and rigidity.
Another kind of processing mode carbonitriding also is present a kind of important processing mode: carbonitriding is the process of infiltrating simultaneously carbon and nitrogen to the top layer of steel, and carbonitriding is called again cyaniding traditionally.It is wide using with the carbonitriding of middle wet body and cryogenic gas carbonitriding (being gas soft nitriding) at present.The main purpose of middle wet body carbonitriding is to improve the hardness of steel, wear resistance and fatigue strength, and the cryogenic gas carbonitriding is take nitriding as main, and its main purpose is to improve wear resistance and the seizure resistance of steel.
Though overcome to a certain extent nitrided case hardness height take carburizing as the main chemical heat treatment process that infiltrates simultaneously nitrogen but infiltration layer is more shallow, though and the cementation zone hardening depth is large, the shortcoming that surface hardness is lower.Use and only have more widely gas method and salt bath method.The gas carbonitriding medium is the gas mixture of carburizing agent and nitriding medium, for example drips kerosene or ethanol, acetone, logical ammonia; Drink in the neither endothermic nor exothermic type gas and increase carbon potential enriched gas and logical ammonia; Trolamine or dissolve in the pure continuous drip of urea.Carbonitriding is also quenched, is organized as martensite containing nitrogen, carboritride and residual austenite after the tempering.
At riveting machine with the low-carbon alloy material particularly in the treatment technology of 12Cr2Ni4 material, also there is not the comprehensive treatment technology scheme of system complete, the result of material processing can not reach satisfied requirement, quench after the in the past riveting machine of the 12Cr2Ni4 employing carbonitriding and add the thermal treatment process of tempering, can obtain the higher hardness on surface and the obdurability of heart section, have in holding workpiece inside under the condition of higher toughness, obtain high rigidity, high-intensity upper layer, with wear resistance and the intensity of raising workpiece, but also with the toughness of upper layer and the obdurability good combination of upper layer and the heart section close relationship is arranged its work-ing life.Also there is not at present satisfied system's heat treatment technics.
Summary of the invention
The present invention discloses a kind of heat treatment process of low-carbon alloy material according to the deficiencies in the prior art, the problem to be solved in the present invention provides a kind of heat treatment process of low-carbon alloy material, particularly riveting machine is with the thermal treatment process of 12Cr2Ni4 parts, to improve carbonitriding highly malleablized Combined Processing result, the work-ing life of improving widely the riveting machine parts.
The present invention is achieved through the following technical solutions:
Heat treatment process of low-carbon alloy material comprises carbonitriding processing, quench treatment, sub-zero treatment and temper, wherein:
Carbonitriding, process workpiece under 850 ℃～870 ℃ conditions, speed with 180～200/per minute drips anhydrous methanol, stable lasting after 60～90 minutes, speed dropping kerosene with 120～140/per minute passes into concentration 99.99% ammonia 60～90 minutes with 240～280 ml/min simultaneously, and then the speed dropping kerosene with 70～90/per minute passes into concentration 99.99% ammonia after 150～180 minutes with 160～200 ml/min simultaneously; Be cooled to 660 ℃～720 ℃, drip anhydrous methanol with the speed of 60～90/per minute and pass into concentration 99.99% ammonia 90～120 minutes to normal temperature with 80～120 ml/min simultaneously;
Quench, workpiece oil quenching after carbonitriding is processed, 830 ℃～850 ℃ of oil quenching temperature are incubated 35～60 minutes, cooling;
Sub-zero treatment, with workpiece sub-zero treatment after the quench treatment, the treatment media liquid nitrogen, temperature-150 ℃～-160 ℃ continues 3～24 hours, then takes out and puts at room temperature, treats that temperature retrieval arrives room temperature;
Tempering with workpiece temper after the sub-zero treatment, at 190 ℃～210 ℃, is incubated 120 minutes, cools off in the air.
Described sub-zero treatment is from room temperature, and speed of cooling is 15 ℃～20 ℃/hour.Quench cooled is directly carried out sub-zero treatment after 7～10 minutes.
Described low-carbon alloy material is the 12Cr2Ni4 alloy material.12Cr2Ni4 characteristic and the scope of application: 12Cr2Ni4 intensity is high, good toughness, hardening capacity are good, carburizing and quenching rear surface layer hardness and wear resistance are all good, plasticity is good during cold deformation, machinability is fair, as the large-scale carburizing part of working under the high loading, repeated stress, as be subjected to the machineries such as various gears, worm gear, worm screw, axle of high loading; Its Chemical Composition mainly is: carbon C:0.13, and silicon Si:0.29, manganese Mn:0.41, sulphur S:0.008, phosphorus P:0.004, chromium Cr:1.34, nickel: 3.35, copper Cu:0.04, titanium Ti:0.01, vanadium V:0.01, molybdenum Mo:0.01; 12Cr2Ni4 mechanical property: tensile strength sigma b (MPa): 1200, yield strength σ s (MPa): 990, elongation 65 (%): 16, relative reduction in area ψ (%): 58, Impact energy Ak v (J): 78, hardness: 243HB 245HB 245HB.
Adopt after the art breading of the present invention the low-carbon alloy material particularly the 12Cr2Ni4 alloy material have the following advantages:
1, hardness: hardness has improved 2-4HRC; 1.5-4.2HRC has improved in heart section.
2, ballistic work: improved 50-80%.
3, bending property: significantly improve.
4, residual austenite content reduces in the upper layer tissue, and martensite and carbide increase, and the carbide small and dispersed evenly distributes, thereby has improved obdurability.Residual austenite content reduces to some extent in the core structure, and corresponding martensite increases, thereby has improved matrix hardness and intensity.
5, prolong 50%-70% work-ing life.Ordinary process is processed the average access times of same material general 20,000 times, and access times are about 2.9 ten thousand to 3.5 ten thousand times after the process modification of the present invention.
In sum, low-carbon alloy material after the art breading of the present invention particularly 12Cr2Ni4 alloy material can obtain the higher hardness on surface and the obdurability of heart section, have in holding workpiece inside under the condition of higher toughness, obtain high rigidity, high-intensity upper layer, to improve wear resistance and the intensity of workpiece, the obdurability good combination of the toughness of its work-ing life and upper layer and upper layer and heart section has close relationship.Can well prolong work-ing life after adopting sub-zero treatment, improve matrix hardness and intensity.
Description of drawings
Fig. 1 is the micro-enlarged photograph of 12Cr2Ni4 alloy material surface layer tissue by art breading of the present invention.
Fig. 2 is the micro-enlarged photograph of 12Cr2Ni4 alloy material core structure by art breading of the present invention.
Fig. 3 is the micro-enlarged photograph of 12Cr2Ni4 alloy material surface layer tissue that traditional technology is processed comparative example.
Fig. 4 is the micro-enlarged photograph of 12Cr2Ni4 alloy material core structure that traditional technology is processed comparative example.
Fig. 5 is carbonitriding technology flow process conditional parameter table of the present invention.
Embodiment
The present invention is further described below in conjunction with embodiment, and embodiment is to the further specifying of the principle of the invention, and does not limit the present invention in any way, or similar techniques identical with the present invention all do not exceed the scope of protection of the invention.
Embodiment 1
This example adopts thermal treatment process of the present invention.
Material is prepared, and gets the riveting machine that the 12Cr2Ni4 alloy material is made, and removes surface irregularities.
Thermal treatment, the riveting machine that above-mentioned 12Cr2Ni4 alloy material is made follows these steps to process,
1, carbonitriding, process workpiece under 850 ℃～870 ℃ conditions, speed with 180～200/per minute drips anhydrous methanol, stable lasting after 60～90 minutes, speed dropping kerosene with 120～140/per minute passes into concentration 99.99% ammonia 60～90 minutes with 240～280 ml/min simultaneously, and then the speed dropping kerosene with 70～90/per minute passes into concentration 99.99% ammonia after 150～180 minutes with 160～200 ml/min simultaneously; Be cooled to 660 ℃～720 ℃, drip anhydrous methanol with the speed of 60～90/per minute and pass into concentration 99.99% ammonia 90～120 minutes to normal temperature with 80～120 ml/min simultaneously; Described carbonitriding this area can represent with shown in Figure 5:
2, quench, workpiece oil quenching after carbonitriding is processed, 830 ℃～850 ℃ of oil quenching temperature are incubated 35～60 minutes, cooling;
3, sub-zero treatment, with workpiece sub-zero treatment after the quench treatment, the treatment media liquid nitrogen, temperature-150 ℃～-160 ℃ continues 3～24 hours;
4, tempering with workpiece temper after the sub-zero treatment, at 190 ℃～210 ℃, is incubated 120 minutes, cools off in the air.
Can be by from room temperature when sub-zero treatment, speed of cooling is carried out with 15 ℃-20 ℃/hour.
Processing laggard line correlation detects.
Comparative example
Choose the material pieces identical with embodiment 1 and heat-treat by traditional method, concrete steps are: 1, carbonitriding; 2, quench; 3, tempering.Each step condition can adopt typical conditions, for relatively, and the condition that this routine carbonitriding, quenching and tempering employing and embodiment 1 are identical.
Processing laggard line correlation detects.
Comparative result is as follows:
Hardness HRC:(sees Table 1)
The hardness value data of two kinds for the treatment of process of table 1.
Impelling strength: (seeing Table 2)
The ballistic work data of two kinds for the treatment of process of table 2.
Flexural strength: (seeing Table 3)
The crooked test sample is rectangle in this research, becomes bend specimen by materials processing, again each sample is carried out carbonitriding thermal treatment, then carries out carrying out crooked test after above two kinds of art breading again.During crooked test, rectangular specimen is placed on span L
sCarrying out three-point bending on the bearing of=80mm loads.
The flexural strength data of two kinds for the treatment of process of table 3.
In conjunction with the micro-enlarged photograph of the contrast inventive example and comparative example, can know, the 12Cr2Ni4 alloy material hardness after the present invention processes: hardness has improved 2-4HRC; 1.5-4.2HRC has improved in heart section.Ballistic work has improved 50-80%.Bending property significantly improves.Residual austenite content reduces in the upper layer tissue, and martensite and carbide increase, and the carbide small and dispersed evenly distributes, thereby has improved obdurability.Residual austenite content reduces to some extent in the core structure, and corresponding martensite increases, thereby has improved matrix hardness and intensity.
Prolong 50%-70% work-ing life.General 20,000 times of the average access times of original technique inner-outer sleeve, access times are about 2.9 ten thousand to 3.5 ten thousand times after the process process modification.
Claims (2)
1. heat treatment process of low-carbon alloy material, described low-carbon alloy material is the 12Cr2Ni4 alloy material, comprises carbonitriding processing, quench treatment, sub-zero treatment and temper, it is characterized in that:
Carbonitriding, process workpiece under 850 ℃～870 ℃ conditions, speed with 180～200/per minute drips anhydrous methanol, stable lasting after 60～90 minutes, speed dropping kerosene with 120～140/per minute passes into concentration 99.99% ammonia 60～90 minutes with 240～280 ml/min simultaneously, and then the speed dropping kerosene with 70～90/per minute passes into concentration 99.99% ammonia after 150～180 minutes with 160～200 ml/min simultaneously; Be cooled to 660 ℃～720 ℃, drip anhydrous methanol with the speed of 60～90/per minute and pass into concentration 99.99% ammonia 90～120 minutes to normal temperature with 80～120 ml/min simultaneously;
Quench, workpiece oil quenching after carbonitriding is processed, 830 ℃～850 ℃ of oil quenching temperature are incubated 35～60 minutes, cooling;
Sub-zero treatment, with workpiece sub-zero treatment after the quench treatment, the treatment media liquid nitrogen, temperature-150 ℃～-160 ℃ continues 3～24 hours, then takes out and puts at room temperature, treats that temperature retrieval arrives room temperature;
Tempering with workpiece temper after the sub-zero treatment, at 190 ℃～210 ℃, is incubated 120 minutes, cool off in the air.
2. heat treatment process of low-carbon alloy material according to claim 1, it is characterized in that: described sub-zero treatment is from room temperature, and speed of cooling is 15 ℃～20 ℃/hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110229837 CN102277581B (en) | 2011-08-11 | 2011-08-11 | Heat treatment process of low-carbon alloy material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110229837 CN102277581B (en) | 2011-08-11 | 2011-08-11 | Heat treatment process of low-carbon alloy material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102277581A CN102277581A (en) | 2011-12-14 |
| CN102277581B true CN102277581B (en) | 2013-02-06 |
Family
ID=45103305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110229837 Expired - Fee Related CN102277581B (en) | 2011-08-11 | 2011-08-11 | Heat treatment process of low-carbon alloy material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102277581B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447782A (en) * | 2013-09-12 | 2013-12-18 | 昆山奥德鲁自动化技术有限公司 | Machining method of lathe spindle |
| CN103555923A (en) * | 2013-11-01 | 2014-02-05 | 瓦房店凯威精工轴承制造有限公司 | Precision bearing cold and heat treatment technological method |
| CN103924248A (en) * | 2014-04-24 | 2014-07-16 | 鑫光热处理工业(昆山)有限公司 | Carbonitriding quenching process for car seat adjuster component |
| CN105886941A (en) * | 2016-06-16 | 2016-08-24 | 汤海涛 | Non-quenched and tempered composite shaft part |
| CN106048509B (en) * | 2016-07-01 | 2018-03-09 | 兴化东华齿轮有限公司 | A kind of sprocket wheel low-temperature nitrocarburizing technique |
| CN105970150B (en) * | 2016-07-01 | 2018-03-09 | 兴化东华齿轮有限公司 | A kind of super C N co-penetration technologies |
| CN107299204A (en) * | 2017-03-31 | 2017-10-27 | 西南大学 | A kind of processing method of raising 20CrMnMo hardness of steel |
| CN108411093A (en) * | 2018-03-26 | 2018-08-17 | 湖南特科能热处理有限公司 | A kind of heat treatment process reducing transfer-case idle shaft gear shifting quadrant texturing |
| CN110714181B (en) * | 2019-10-16 | 2022-06-14 | 中国航发中传机械有限公司 | Heat treatment method of lubricating oil pump gear |
| CN112157929B (en) * | 2020-09-25 | 2022-07-08 | 湖南科嘉新材料有限公司 | Hot-press forming and demoulding method for short fiber reinforced carbon/resin composite material |
| CN115198059B (en) * | 2022-06-09 | 2023-09-08 | 太原理工大学 | Magnetic field cryogenic treatment method for increasing wear resistance of 18CrNiMo7-6 carburizing steel |
| CN117144288B (en) * | 2023-10-24 | 2024-01-30 | 中国科学院力学研究所 | Chemical heat treatment process for surface modified layer steel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139692A (en) * | 2007-09-28 | 2008-03-12 | 四川航空液压机械厂 | Martensitic stainless steel cementation method and product thereof |
| CN101418451A (en) * | 2008-11-19 | 2009-04-29 | 郑州航空工业管理学院 | Carbonitriding-deep Re-B-C-N penetration composite heat treating process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5241455B2 (en) * | 2008-12-02 | 2013-07-17 | 新日鐵住金株式会社 | Carbonitriding member and method for producing carbonitriding member |
-
2011
- 2011-08-11 CN CN 201110229837 patent/CN102277581B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139692A (en) * | 2007-09-28 | 2008-03-12 | 四川航空液压机械厂 | Martensitic stainless steel cementation method and product thereof |
| CN101418451A (en) * | 2008-11-19 | 2009-04-29 | 郑州航空工业管理学院 | Carbonitriding-deep Re-B-C-N penetration composite heat treating process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102277581A (en) | 2011-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102277581B (en) | Heat treatment process of low-carbon alloy material | |
| CN104032221B (en) | A kind of Nb-microalloying high-carbon-chromium bearing steel and hot rolling production method thereof | |
| EP3176276B1 (en) | Steel for carbonitrided bearing | |
| CN101784681B (en) | Secondary-hardening gear steel | |
| CN104630634B (en) | The excellent carburizing steel of forging and its manufacture method | |
| CN100503893C (en) | Process for producing gear with hard bainite structure on surface | |
| CN101798657A (en) | Micro-alloy chemical die steel and thermal treatment method thereof | |
| CN104928586A (en) | Hot stamping die steel and production method thereof | |
| CN105671435B (en) | Heat-treating methods and molding part are carried out to the steel for manufacturing bearing | |
| JP2004292945A (en) | Rolling member, and its production method | |
| CN105587773B (en) | A kind of high rigidity bearing | |
| CN109161667B (en) | Bearing component and preparation method thereof | |
| CN100532887C (en) | Gear part and method of producing thereof | |
| JP2007321198A (en) | Surface hardened transition metal material and its production method | |
| CN113862561A (en) | Long-life high-carbon bearing steel pipe and preparation method and application thereof | |
| US9546680B2 (en) | Bearing component | |
| CN101619412A (en) | Intrinsic non-net secondary cementite steel and application method thereof | |
| JP5402711B2 (en) | Steel product having carbonitriding layer and method for producing the same | |
| CN106050936A (en) | Self-lubrication alloy bearing with long life | |
| CN108060353A (en) | A kind of shield engine disk type hobbing cutter ring alloy | |
| CN112795722A (en) | Austempering technology for austempered ductile iron | |
| JPH0559527A (en) | Production of steel excellent in wear resistance and rolling fatigue characteristic | |
| JP3849296B2 (en) | Method of manufacturing steel for nitrocarburizing and nitrocarburized component using the steel | |
| JP3855418B2 (en) | Method of manufacturing nitrocarburizing steel material and nitrocarburized component using the steel material | |
| CN108342658A (en) | A kind of axis class and gear steel and its heat treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20200811 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |