CN202705401U - Isothermal quenching workpiece strengthened by carburizing - Google Patents
Isothermal quenching workpiece strengthened by carburizing Download PDFInfo
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- CN202705401U CN202705401U CN2012203429922U CN201220342992U CN202705401U CN 202705401 U CN202705401 U CN 202705401U CN 2012203429922 U CN2012203429922 U CN 2012203429922U CN 201220342992 U CN201220342992 U CN 201220342992U CN 202705401 U CN202705401 U CN 202705401U
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- carburizing
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- isothermal quenching
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
本实用新型涉及一种渗碳强化的等温淬火工件，其由心部向外依次包括：基体、渗碳层；上述基体包含有铁素体；上述渗碳层包括：与上述基体相接的过渡层、与上述过渡层相接的位于表面的表面层；上述过渡层包含有铁素体，上述表面层包含有残余奥氏体，其更容易和适于进行后期的整形，并且能够提高使用寿命。
The utility model relates to a carburized and strengthened austempering workpiece, which sequentially includes: a base body and a carburized layer from the center; the base body contains ferrite; the carburized layer includes: a transitional Layer, the surface layer on the surface that is in contact with the above-mentioned transition layer; the above-mentioned transition layer contains ferrite, and the above-mentioned surface layer contains residual austenite, which is easier and suitable for later shaping, and can increase the service life .
Description
Technical field
The utility model relates to the workpiece that a kind of carburizing is strengthened, and is specifically related to isothermal quenching workpiece and working method that a kind of carburizing is strengthened.
Background technology
In order to improve the surface property of workpiece, often workpiece is carried out carburizing treatment, carburizing treatment is a kind of to metal finishing, that adopts carburizing mostly is soft steel or low alloy steel, and concrete grammar is workpiece to be inserted have in the activated carburizing medium, be heated to certain temperature after, behind the insulation enough time, make the active atoms of carbon that decomposites in the carburizing medium infiltrate the steel part top layer, thereby obtain the top layer high-carbon, heart section still keeps original composition.
But, in actual applications, have relatively high expectations for some profiles and mechanical property, and the workpiece that Thickness Ratio is thinner, when adopting original general carburizing, quenching, tempering process, the often distortion of very difficult control workpiece, and its toughness and fatigue strength are poor, cause the workpiece performance to satisfy the demands.
The utility model content
For solving the deficiencies in the prior art, the purpose of this utility model is to provide a kind of weave construction rationally can play the isothermal quenching workpiece that improves shaping effect.
In order to realize above-mentioned target, the utility model adopts following technical scheme:
The isothermal quenching workpiece that a kind of carburizing is strengthened is characterized in that section outwards comprises successively by the heart: matrix, cementation zone; Above-mentioned matrix includes ferrite; Above-mentioned cementation zone comprises: the transition layer that joins with above-mentioned matrix, the upper layer that is positioned at the surface that joins with above-mentioned transition layer; Above-mentioned transition layer includes ferrite, and above-mentioned upper layer includes residual austenite.
Particularly, also include lath martensite in the above-mentioned matrix.
Particularly, also include bainite in the above-mentioned transition layer, the bainite in this layer is lower bainite.
Particularly, also include bainite in the above-mentioned upper layer, the bainite in this layer is lower bainite.
Particularly, the total thickness of above-mentioned cementation zone is less than 0.5mm greater than 0.15mm.
Particularly, the thickness range of above-mentioned transition layer be greater than 0mm less than 0.3mm, above-mentioned surface layer thickness scope is less than 0.15mm greater than 0mm.
Usefulness of the present utility model is: workpiece of the present invention has strengthened toughness and the yield strength of workpiece surface greatly because having the cementation zone that contains lower bainite, makes it easier and be suitable for carrying out the shaping in later stage, and can improve work-ing life.
Description of drawings
Fig. 1 is that the embryo material is the metallograph that adopts the workpiece surface vicinity that general carburizing, quenching, tempering process process when the trade mark is the steel of ST12 among the German standard DIN1623, magnification is 400 times, and etching condition is for being that the nital of 3-5% corrodes with mass concentration;
Fig. 2 is the sectional structure synoptic diagram of the isothermal quenching workpiece of a kind of carburizing reinforcement of the present invention;
Fig. 3 is that the trade mark is the metallograph that the steel of ST12 adopt the workpiece that working method of the present invention processes constantly among the German standard DIN1623, and magnification is 100 times, and etching condition is for to corrode with the nital that with mass concentration is 3-5%.
The implication of Reference numeral among the figure:
1, matrix, 2, cementation zone, 201, transition layer, 202, upper layer.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done concrete introduction.
With reference to shown in Figure 2, the isothermal quenching workpiece that carburizing of the present invention is strengthened mainly comprises: matrix and cementation zone.
Wherein, include ferrite in the matrix, as preferred version, also include the lath martensite tissue in the matrix.
Cementation zone particularly comprises two sublayers: the transition layer that joins with matrix, with the upper layer that is positioned at the surface that transition layer joins, surface level is in the surface tissue of outermost as workpiece, transition layer is between matrix and the upper layer.Include ferrite in the transition layer, include residual austenite in the upper layer.
As preferred version, also include bainite in the transition layer, the bainite in this layer is lower bainite.Also include bainite in the upper layer, the bainite in this layer is lower bainite.
As further preferred version, the total thickness of cementation zone is less than 0.5mm greater than 0.15mm.The thickness range of transition layer be greater than 0mm less than 0.3mm, above-mentioned surface layer thickness scope is less than 0.15mm greater than 0mm.
In order to realize the utility model, we are described in detail preparation of the present utility model in conjunction with following method.
We adopt the trade mark among the German standard DIN1623 is that the steel of ST12 are put into practice method of the present invention as the embryo material:
The a surface treatment: the outside surface to above-mentioned workpiece cleans, and eliminates greasy dirt and oxide skin;
B carburizing treatment: after being heated to carburizing temperature 880 degree, be the carburizing treatment of carrying out in 1% the situation 60 minutes at carbon potential;
The c isothermal quenching: after carburizing finishes, carry out immediately temperature and be the isothermal quenching under 300 degree Celsius, the cool time is 20 minutes, and to be saltpetre and SODIUMNITRATE with quality make a comparison the solid salt of used quenching one mixes;
D clean surface: after above-mentioned isothermal quenching is finished, omit tempering and directly clean.
We adopt same embryo material, according to general processing thought, spend as carburizing temperature with Celsius 880, under the condition of carbon potential 1.1%, carry out carburizing in 60 minutes, then kept 20 minutes at 100 ℃ of quenching oil quenchings, carry out tempering with 180 degree again, continue 100 minutes, obtain workpiece as shown in Figure 1.
Measure through us, the surface hardness of Fig. 1 and workpiece shown in Figure 3 is all about HV720, but comparison diagram 1 and Fig. 3, martensitic structure is when providing higher intensity and hardness in the workpiece of Fig. 1, the toughness and the plasticity that also are workpiece itself descend, when the structure of workpiece is thinner, be unfavorable for the shaping in later stage, planeness can not be guaranteed, and in the situation that effects on surface is had relatively high expectations, martensitic fragility is affected its work-ing life, and workpiece of the present invention is because be formed with lower bainite at cementation zone, in the satisfactory while of proof strength and hardness, balance toughness and the plasticity of workpiece, for the workpiece of thinner structure, can adapt to the needs of the shaping in later stage, and improve the life-span to a certain extent.
Above-described embodiment does not limit the utility model in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in the protection domain of the present utility model.
Claims (6)
1. the isothermal quenching workpiece that carburizing is strengthened is characterized in that section outwards comprises successively by the heart: matrix, cementation zone; Above-mentioned matrix includes ferrite; Above-mentioned cementation zone comprises: the transition layer that joins with above-mentioned matrix, the upper layer that is positioned at the surface that joins with above-mentioned transition layer; Above-mentioned transition layer includes ferrite, and above-mentioned upper layer includes residual austenite.
2. the isothermal quenching workpiece of a kind of carburizing reinforcement according to claim 1 is characterized in that, also includes lath martensite in the above-mentioned matrix.
3. the isothermal quenching workpiece of a kind of carburizing reinforcement according to claim 1 is characterized in that also include bainite in the above-mentioned transition layer, the bainite in this layer is lower bainite.
4. the isothermal quenching workpiece of a kind of carburizing reinforcement according to claim 1 is characterized in that also include bainite in the above-mentioned upper layer, the bainite in this layer is lower bainite.
5. the isothermal quenching workpiece of strengthening to the described a kind of carburizing of 4 any one according to claim 1 is characterized in that the total thickness of above-mentioned cementation zone is less than 0.5mm greater than 0.15mm.
6. the isothermal quenching workpiece strengthened of a kind of carburizing according to claim 5 is characterized in that, the thickness range of above-mentioned transition layer be greater than 0mm less than 0.3mm, above-mentioned surface layer thickness scope is less than 0.15mm greater than 0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203429922U CN202705401U (en) | 2012-07-16 | 2012-07-16 | Isothermal quenching workpiece strengthened by carburizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203429922U CN202705401U (en) | 2012-07-16 | 2012-07-16 | Isothermal quenching workpiece strengthened by carburizing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202705401U true CN202705401U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012203429922U Expired - Lifetime CN202705401U (en) | 2012-07-16 | 2012-07-16 | Isothermal quenching workpiece strengthened by carburizing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796852A (en) * | 2012-07-16 | 2012-11-28 | 鑫光热处理工业(昆山)有限公司 | Carburizing reinforced isothermal quenching workpiece and processing method thereof |
-
2012
- 2012-07-16 CN CN2012203429922U patent/CN202705401U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796852A (en) * | 2012-07-16 | 2012-11-28 | 鑫光热处理工业(昆山)有限公司 | Carburizing reinforced isothermal quenching workpiece and processing method thereof |
| CN102796852B (en) * | 2012-07-16 | 2014-07-02 | 鑫光热处理工业(昆山)有限公司 | Carburizing reinforced isothermal quenching workpiece and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |