CN106086769A - A kind of Carburization Treatment method - Google Patents
A kind of Carburization Treatment method Download PDFInfo
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- CN106086769A CN106086769A CN201610443064.8A CN201610443064A CN106086769A CN 106086769 A CN106086769 A CN 106086769A CN 201610443064 A CN201610443064 A CN 201610443064A CN 106086769 A CN106086769 A CN 106086769A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The present invention provides a kind of Carburization Treatment method, the method that this Carburization Treatment method have employed Composite carburization, is first placed in by workpiece in the carburizing medium of 900～980 DEG C, insulation, and then workpiece is continued to be placed in the carburizing medium of 900～980 DEG C by cooling, insulation.The present invention is after first time carburizing, and surface of the work has certain carbon content distribution and macroscopic thickness.Meanwhile, the present invention utilizes the second time carburizing of step b) to improve the concentration of carbon of surface of the work, thus improves macrohardness and the case hardness of surface of the work.Test result indicate that, the macroscopic thickness of the workpiece after present invention process is 0.78～1mm, and the hardness at 0.15mm is more than 700HV.
Description
Technical field
The present invention relates to processing method technical field, more particularly, it relates to a kind of Carburization Treatment method.
Background technology
Carburization Treatment method is a kind of metal surface treating method, is the main of parts with abrasion as dominant failure mode
Heat treatment method.Specifically, Carburization Treatment method is to increase the phosphorus content on steel part top layer and forming certain concentration of carbon
Gradient, heats steel part in carburizing medium and is incubated, and makes carbon atom penetrate into the chemical heat treatment process on top layer.Carburization Treatment side
Method includes pack carburizing method, liquid carburizing, vacuum carburizing and gas carbonizing method etc..
It is desirable to the workpiece of carburizing mostly is mild steel or low-alloy steel, common method is: workpiece is inserted activated carburizing
In medium, it is heated to the single phase austenite district of 900～950 DEG C, insulation, make the activated carbon atom decomposited in activated carburizing medium
Penetrate into workpiece surface, thus obtain top layer high-carbon, heart portion still keeps the workpiece of original composition.
The Carburization Treatment technical specification of conventional workpiece includes hardened layer, case hardness, centre hardness, macroscopic thickness etc..Its
In, macroscopic thickness refers to the case depth that hardness is 685Hv.Workpiece after Carburization Treatment, its surface hardness value is higher, from table
Layer to centre hardness is gradually lowered.In prior art, the Carburization Treatment method of report includes first workpiece being carried out carburizing and quenching,
It is tempered after cleaning；Or first by workpiece carbonization air cooling, then quench, be tempered after cleaning.According to above-mentioned Carburization Treatment side
Although the overall hardened layer of workpiece after method processes reaches requirement, but, due to the diffusion reason of carbon atom, workpiece in carburizing process
Top layer certain depth can not obtain high concentration of carbon, thus occur that top layer certain limit hardness number compares relatively low, surface is strong
Degree shortcoming, macroscopic thickness is less, the most often shows as easily occurring premature wear.Especially for high performance large-scale
For high-grade motorcycle, racing car etc. are due to the high vehicle of work under bad environment, performance requirement, usually can cause initial failure or meaning
Outer fault etc..
In order to improve case hardness and the macroscopic thickness of workpiece, Normal practice is mostly by improving carburizing carbon potential to improve work
Part carbon contents, thus improve surface of the work hardness, meet macroscopic thickness requirement.But, at high carburizing carbon potential
The workpiece remained austenite content after quenching of reason will increase, and therefore, the method not only can not improve the case hardness of part, drops on the contrary
The low microhardness of workpiece, makes decline the service life of workpiece.
Summary of the invention
In order to overcome drawbacks described above, it is an object of the invention to provide a kind of Carburization Treatment method, the work after the method process
Part has higher case hardness and macroscopic thickness.
In order to overcome defect present in background technology, the technical solution adopted for the present invention to solve the technical problems is:
A kind of Carburization Treatment method, including following steps:
Workpiece is placed in the carburizing medium of 880～980 DEG C by step a), insulation, cooling；
Workpiece after step a) is processed by step b) is placed in the carburizing medium of 880～980 DEG C, insulation.
In some embodiments, described step a) particularly as follows:
Step a1) workpiece is placed in temperature be 880～980 DEG C, carbon potential be 0.5%～1.5% carburizing medium in be incubated 4
～12 hours；
Step a2) by step a1) process after workpiece cooling.
In some embodiments, described step a1) particularly as follows:
Step a11) workpiece is placed in temperature be 880～940 DEG C, carbon potential be 1.2% carburizing medium in be incubated 2～4 little
Time；
Step a12) by step a11) process after workpiece in the carburizing medium that carbon potential is 1.1%, be incubated 3～5 hours；
Step a13) by step a12) process after workpiece spread 2 hours in the carburizing medium that carbon potential is 0.8%.
In some embodiments, described step a2) particularly as follows:
By step a1) process after workpiece place 1～5 hour in atmosphere.
In some embodiments, 5, processing method according to claim 1, it is characterised in that described step b)
Particularly as follows:
Step b1) workpiece is placed in temperature be 900～950 DEG C, carbon potential be 1.2% carburizing medium in be incubated 2～5 little
Time；
Step b2) by step b1) process after workpiece in the carburizing medium that carbon potential is 1.1%, be incubated 3～5 hours；
Step b3) by step b2) process after workpiece spread 2 hours in the carburizing medium that carbon potential is 0.8%.
In some embodiments, in described step a) and step b), carburizing medium is methanol and propane.
In some embodiments, also include:
Step c) is by the workpiece quenching after step b) process；
The workpiece temper that step c) is obtained by step d).
Processing method according to claim 7, it is characterised in that described step c) particularly as follows:
Step c1) by step b) process after workpiece heat to 820～900 DEG C, insulation；
Step c2) by step c1) obtain workpiece and be cooled to 850 DEG C, insulation, it is subsequently placed in the quenching oil of 100 DEG C.
In some embodiments, described step d) particularly as follows:
Step d1) workpiece that obtained by step c) is incubated 1～5 hour at 120～180 DEG C；
Step d2) by step d1) obtain workpiece cooling.
A kind of Carburization Treatment method that the present invention provides provides the benefit that: the present invention provides a kind of Carburization Treatment method,
The method that this Carburization Treatment method have employed Composite carburization, is first placed in workpiece in the carburizing medium of 900～980 DEG C, insulation,
Cooling, then continues workpiece to be placed in the carburizing medium of 900～980 DEG C, insulation.The present invention after first time carburizing, workpiece
Surface has certain carbon content distribution and macroscopic thickness.Meanwhile, the present invention utilizes the second time carburizing of step b) to improve workpiece
The concentration of carbon on surface, thus improve macrohardness and the case hardness of surface of the work.Test result indicate that, after the present invention processes
The macroscopic thickness of workpiece be 0.78～1mm, the hardness at 0.15mm is more than 700HV.
Detailed description of the invention
By the embodiment of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of protection of the invention.
Embodiment one:
A kind of Carburization Treatment method that the present invention provides, including:
Workpiece is placed in the carburizing medium of 880 DEG C by step a), insulation, cooling；
Step a1) workpiece is placed in temperature be 880 DEG C, carbon potential be 0.5% carburizing medium in be incubated 4 hours；
Step a11) workpiece is placed in temperature be 880 DEG C, carbon potential be 1.2% carburizing medium in be incubated 2 hours；
Step a12) by step a11) process after workpiece in the carburizing medium that carbon potential is 1.1%, be incubated 3 hours；
Step a13) by step a12) process after workpiece spread 2 hours in the carburizing medium that carbon potential is 0.8%；
By step a1) process after workpiece place 1 hour in atmosphere；
Step a2) by step a1) process after workpiece cooling.
Workpiece after step a) is processed by step b) is placed in the carburizing medium of 880 DEG C, insulation.
Step b1) workpiece is placed in temperature be 900 DEG C, carbon potential be 1.2% carburizing medium in be incubated 2 hours；
Step b2) by step b1) process after workpiece in the carburizing medium that carbon potential is 1.1%, be incubated 3 hours；
Step b3) by step b2) process after workpiece spread 2 hours in the carburizing medium that carbon potential is 0.8%.
As preferably, in step a) and step b), carburizing medium is methanol and propane.
Step c) is by the workpiece quenching after step b) process；
Step c1) by step b) process after workpiece heat to 820 DEG C, insulation；
Step c2) by step c1) obtain workpiece and be cooled to 850 DEG C, insulation, it is subsequently placed in the quenching oil of 100 DEG C.
The workpiece temper that step c) is obtained by step d).
Step d1) workpiece that obtained by step c) is incubated 1 hour at 120 DEG C；
Step d2) by step d1) obtain workpiece cooling.
Embodiment two:
A kind of Carburization Treatment method that the present invention provides, including:
Workpiece is placed in the carburizing medium of 980 DEG C by step a), insulation, cooling；
Step a1) workpiece is placed in temperature be 980 DEG C, carbon potential be 1.5% carburizing medium in be incubated 12 hours；
Step a11) workpiece is placed in temperature be 940 DEG C, carbon potential be 1.2% carburizing medium in be incubated 4 hours；
Step a12) by step a11) process after workpiece in the carburizing medium that carbon potential is 1.1%, be incubated 3～5 hours；
Step a13) by step a12) process after workpiece spread 2 hours in the carburizing medium that carbon potential is 0.8%；
By step a1) process after workpiece place 5 hours in atmosphere；
Step a2) by step a1) process after workpiece cooling.
Workpiece after step a) is processed by step b) is placed in the carburizing medium of 980 DEG C, insulation.
Step b1) workpiece is placed in temperature be 950 DEG C, carbon potential be 1.2% carburizing medium in be incubated 5 hours；
Step b2) by step b1) process after workpiece in the carburizing medium that carbon potential is 1.1%, be incubated 5 hours；
Step b3) by step b2) process after workpiece spread 2 hours in the carburizing medium that carbon potential is 0.8%.
As preferably, in step a) and step b), carburizing medium is methanol and propane.
Step c) is by the workpiece quenching after step b) process；
Step c1) by step b) process after workpiece heat to 900 DEG C, insulation；
Step c2) by step c1) obtain workpiece and be cooled to 850 DEG C, insulation, it is subsequently placed in the quenching oil of 100 DEG C.
The workpiece temper that step c) is obtained by step d).
Step d1) workpiece that obtained by step c) is incubated 5 hours at 180 DEG C；
Step d2) by step d1) obtain workpiece cooling.
Embodiment three:
A kind of Carburization Treatment method that the present invention provides, including:
Workpiece is placed in the carburizing medium of 940 DEG C by step a), insulation, cooling；
Step a1) workpiece is placed in temperature be 940 DEG C, carbon potential be 1.0% carburizing medium in be incubated 8 hours；
Step a11) workpiece is placed in temperature be 910 DEG C, carbon potential be 1.2% carburizing medium in be incubated 3 hours；
Step a12) by step a11) process after workpiece in the carburizing medium that carbon potential is 1.1%, be incubated 4 hours；
Step a13) by step a12) process after workpiece spread 2 hours in the carburizing medium that carbon potential is 0.8%；
By step a1) process after workpiece place 3 hours in atmosphere；
Step a2) by step a1) process after workpiece cooling.
Workpiece after step a) is processed by step b) is placed in the carburizing medium of 940 DEG C, insulation.
Step b1) workpiece is placed in temperature be 925 DEG C, carbon potential be 1.2% carburizing medium in be incubated 2.5 hours；
Step b2) by step b1) process after workpiece in the carburizing medium that carbon potential is 1.1%, be incubated 4 hours；
Step b3) by step b2) process after workpiece spread 2 hours in the carburizing medium that carbon potential is 0.8%.
As preferably, in step a) and step b), carburizing medium is methanol and propane.
Step c) is by the workpiece quenching after step b) process；
Step c1) by step b) process after workpiece heat to 860 DEG C, insulation；
Step c2) by step c1) obtain workpiece and be cooled to 850 DEG C, insulation, it is subsequently placed in the quenching oil of 100 DEG C.
The workpiece temper that step c) is obtained by step d).
Step d1) workpiece that obtained by step c) is incubated 3 hours at 160 DEG C；
Step d2) by step d1) obtain workpiece cooling.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understand and these embodiments can be carried out multiple change without departing from the principles and spirit of the present invention, revise, replace
And modification, the scope of the present invention be defined by the appended.
Claims (8)
1. a Carburization Treatment method, it is characterised in that including:
Workpiece is placed in the carburizing medium of 880～980 DEG C by step a), insulation, cooling；
Workpiece after step a) is processed by step b) is placed in the carburizing medium of 880～980 DEG C, insulation.
Processing method the most according to claim 1, it is characterised in that described step a) particularly as follows:
Step a1) workpiece is placed in temperature be 880～980 DEG C, carbon potential be 0.5%～1.5% carburizing medium in be incubated 4～12
Hour；
Step a2) by step a1) process after workpiece cooling.
Processing method the most according to claim 2, it is characterised in that described step a1) particularly as follows:
Step a11) workpiece is placed in temperature be 880～940 DEG C, carbon potential be 1.2% carburizing medium in be incubated 2～4 hours；
Step a12) by step a11) process after workpiece in the carburizing medium that carbon potential is 1.1%, be incubated 3～5 hours；
Step a13) by step a12) process after workpiece spread 2 hours in the carburizing medium that carbon potential is 0.8%.
Processing method the most according to claim 2, it is characterised in that described step a2) particularly as follows:
By step a1) process after workpiece place 1～5 hour in atmosphere.
Processing method the most according to claim 1, it is characterised in that described step b) particularly as follows:
Step b1) workpiece is placed in temperature be 900～950 DEG C, carbon potential be 1.2% carburizing medium in be incubated 2～5 hours；
Step b2) by step b1) process after workpiece in the carburizing medium that carbon potential is 1.1%, be incubated 3～5 hours；
Step b3) by step b2) process after workpiece spread 2 hours in the carburizing medium that carbon potential is 0.8%.
Processing method the most according to claim 1, it is characterised in that in described step a) and step b), carburizing medium is first
Alcohol and propane.
Processing method the most according to claim 1, it is characterised in that also include:
Step c) is by the workpiece quenching after step b) process；
The workpiece temper that step c) is obtained by step d).
Processing method according to claim 7, it is characterised in that described step c) particularly as follows:
Step c1) by step b) process after workpiece heat to 820～900 DEG C, insulation；
Step c2) by step c1) obtain workpiece and be cooled to 850 DEG C, insulation, it is subsequently placed in the quenching oil of 100 DEG C.
Processing method the most according to claim 7, it is characterised in that described step d) particularly as follows:
Step d1) workpiece that obtained by step c) is incubated 1～5 hour at 120～180 DEG C；
Step d2) by step d1) obtain workpiece cooling.
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| CN201610443064.8A CN106086769A (en) | 2016-06-20 | 2016-06-20 | A kind of Carburization Treatment method |
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| CN201610443064.8A CN106086769A (en) | 2016-06-20 | 2016-06-20 | A kind of Carburization Treatment method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594231A (en) * | 2016-12-19 | 2017-04-26 | 大大科技(宁国)有限公司 | Worm wheel jack |
| CN107245690A (en) * | 2017-06-23 | 2017-10-13 | 江苏丰东热处理及表面改性工程技术研究有限公司 | A kind of carburizing quenching process |
| CN107502851A (en) * | 2017-08-15 | 2017-12-22 | 肥西县通力机械有限公司 | A kind of process of surface treatment of plastic mould |
| CN108823524A (en) * | 2018-07-23 | 2018-11-16 | 安庆牛力模具股份有限公司 | A kind of vacuum heat-treating method of mould steel |
| CN109338276A (en) * | 2018-11-29 | 2019-02-15 | 邢明 | A kind of steel carburization process |
| CN111020459A (en) * | 2019-12-27 | 2020-04-17 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Heat treatment method for small conical bearing |
-
2016
- 2016-06-20 CN CN201610443064.8A patent/CN106086769A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594231A (en) * | 2016-12-19 | 2017-04-26 | 大大科技(宁国)有限公司 | Worm wheel jack |
| CN107245690A (en) * | 2017-06-23 | 2017-10-13 | 江苏丰东热处理及表面改性工程技术研究有限公司 | A kind of carburizing quenching process |
| CN107502851A (en) * | 2017-08-15 | 2017-12-22 | 肥西县通力机械有限公司 | A kind of process of surface treatment of plastic mould |
| CN108823524A (en) * | 2018-07-23 | 2018-11-16 | 安庆牛力模具股份有限公司 | A kind of vacuum heat-treating method of mould steel |
| CN109338276A (en) * | 2018-11-29 | 2019-02-15 | 邢明 | A kind of steel carburization process |
| CN111020459A (en) * | 2019-12-27 | 2020-04-17 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Heat treatment method for small conical bearing |
| CN111020459B (en) * | 2019-12-27 | 2022-04-22 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Heat treatment method for small conical bearing |
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Application publication date: 20161109 |