CN105420453A - Heat treatment method for coupler knuckle - Google Patents
Heat treatment method for coupler knuckle Download PDFInfo
- Publication number
- CN105420453A CN105420453A CN201511009142.5A CN201511009142A CN105420453A CN 105420453 A CN105420453 A CN 105420453A CN 201511009142 A CN201511009142 A CN 201511009142A CN 105420453 A CN105420453 A CN 105420453A
- Authority
- CN
- China
- Prior art keywords
- hook
- hook tongue
- heat treating
- treating method
- tonguing row
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
Abstract
The invention provides a heat treatment method for a coupler knuckle. The heat treatment method for the coupler knuckle sequentially comprises the following steps that quenching treatment is conducted on the coupler knuckle; first cooling is conducted on the coupler knuckle; tempering treatment is conducted on the coupler knuckle; and second cooling is conducted on the coupler knuckle. Through the technical scheme, the problem that in the prior art, the production cost of a coupler knuckle is high can be solved.
Description
Technical field
The present invention relates to hook tongue processing technique field, in particular to a kind of heat treating method of hook tongue.
Background technology
At present, hook tongue is used to realize transmitting tractive power and the key part connecting extension between goods train vehicle, and hook tongue subjects complicated tractive force in utilization process, along with the development of railway heavy haul transport, weight-carrying capacity constantly increases, and has higher requirement to the performance of hook tongue.The principal mode lost efficacy due to hook tongue is fatigure failure, therefore needs the fatigue property increasing hook tongue.
Need in prior art to heat-treat hook tongue, it improves the fatigue property of hook tongue by normalizing and modifier treatment technique, but by the mode of normalizing and modifier treatment, its production cost is higher, cannot produce in enormous quantities.
Summary of the invention
The invention provides a kind of heat treating method of hook tongue, with the problem that the production cost solving hook tongue of the prior art is higher.
According to the heat treating method of a kind of hook tongue provided by the invention, the heat treating method of hook tongue comprises the following steps successively: to hook tonguing row quench treatment; To the first time cooling of hook tonguing row; To hook tonguing row temper; To the cooling of hook tonguing row second time.
Further, to the quenching temperature of hook tonguing row quench treatment between 890 DEG C to 930 DEG C.
Further, quenching temperature is between 900 DEG C to 920 DEG C.
Further, hook tonguing row quench treatment is comprised: hook tongue is incubated 2 to 3 hours under quenching temperature.
Further, to the tempering temperature of hook tonguing row temper between 560 DEG C to 640 DEG C.
Further, tempering temperature is between 620 DEG C to 640 DEG C.
Further, hook tonguing row temper is comprised: hook tongue is incubated 3 to 4 hours under tempering temperature.
Apply technical scheme of the present invention, by quenching successively to hook tongue, first time cooling, tempering, for the second time cooling process, the plasticity and toughness of hook tongue can be improved, and then the fatigue strength of hook tongue can be improved, and, carry out processing period production cost by this heat treating method low, the requirement of production in enormous quantities can be met.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic flow sheet of the heat treating method of the hook tongue provided according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As shown in Figure 1, the invention provides a kind of heat treating method of hook tongue, specifically comprise:
Step one, to hook tonguing row quench treatment.
Wherein, to the quenching temperature of hook tongue between 890 DEG C to 930 DEG C.Further, in order to reach good quenching effect, when to hook tonguing row quench treatment, hook tongue is incubated 2 to 3 hours under its quenching temperature.Alternatively, in order to reach better quenching effect, its quenching temperature remains between 900 DEG C to 920 DEG C.
Step 2, to the first time cooling of hook tonguing row.
Wherein, the type of cooling has multiple, comprising: other type of cooling such as water-cooled, air cooling.Alternatively, in the present embodiment, cooled by water-cooled.
Step 3, to hook tonguing row temper.
Wherein, to the tempering temperature of hook tongue between 560 DEG C to 640 DEG C.Further, in order to reach good tempering effect, when to hook tonguing row temper, hook tongue is incubated 2 to 3 hours under its tempering temperature.Alternatively, in order to reach better tempering effect, its tempering temperature remains between 620 DEG C to 640 DEG C.
Step 4, to the cooling of hook tonguing row second time.
Alternatively, by water-cooling pattern, the hook tonguing row second time after temper is cooled.
Apply technical scheme of the present invention, by quenching successively to hook tongue, first time cooling, tempering, for the second time cooling process, the plasticity and toughness of hook tongue can be improved, and then the fatigue strength of hook tongue can be improved, and, carry out processing period production cost by this heat treating method low, the requirement of production in enormous quantities can be met.
For a better understanding of the present invention, set forth by following examples:
Embodiment one, to hook tonguing row quench treatment, its quenching temperature is 880 DEG C, soaking time 1 hour.Then by water, the hook tonguing row first time after quench treatment is cooled.Again to first time cooled hook tonguing row temper, its tempering temperature is 550 DEG C, and soaking time is 1 hour.Finally to the hook tonguing row second time cooling after temper, the heat treating method of hook tongue can be completed.
Embodiment two, the difference of itself and embodiment one is only, its quenching temperature is 890 DEG C, and Quenching Soaking Time is 2 hours, and tempering temperature is 560 DEG C, and tempering insulation time is 2 hours.
Embodiment three, the difference of itself and embodiment one is only, its quenching temperature is 930 DEG C, and Quenching Soaking Time is 3 hours, and tempering temperature is 640 DEG C, and tempering insulation time is 3 hours.
Embodiment four, the difference of itself and embodiment one is only, its quenching temperature is 900 DEG C, and Quenching Soaking Time is 2.5 hours, and tempering temperature is 620 DEG C, and tempering insulation time is 4 hours.
Embodiment five, the difference of itself and embodiment one is only, its quenching temperature is 920 DEG C, and Quenching Soaking Time is 2.5 hours, and tempering temperature is 640 DEG C, and tempering insulation time is 3.5 hours.
By multiple hook tongues that above-described embodiment obtains, its mechanical property result is as shown in table 1:
Table 1
Wherein, sample number into spectrum 1 to 3 in table 1 is the hook tongue that embodiment one obtains, sample number into spectrum 4 to 6 is the hook tongue that embodiment two obtains, sample number into spectrum 7 and 8 is the hook tongue that embodiment three obtains, sample number into spectrum 9 to 10 is the hook tongue that embodiment four obtains, and sample number into spectrum 11 to 12 is the hook tongue that embodiment five obtains.
By heat treating method provided by the invention, make the yield strength of hook tongue to be more than or equal to 690MPa, tensile strength is more than or equal to 830MPa, and elongation is more than or equal to 18%, relative reduction in area is more than or equal to 55%, and Impact energy Ak v is more than or equal to 100J.This hook tongue can meet the mechanical property requirements of existing use.Further, after being processed by heat treating method provided by the invention, its fatigue lifetime, between 240,000 times to 450,000 times, substantially increases the work-ing life of hook tongue.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a heat treating method for hook tongue, is characterized in that, the heat treating method of described hook tongue comprises the following steps successively:
To hook tonguing row quench treatment;
To the first time cooling of hook tonguing row;
To hook tonguing row temper;
To the cooling of hook tonguing row second time.
2. the heat treating method of hook tongue according to claim 1, is characterized in that, to the quenching temperature of quench treatment described in described hook tonguing row between 890 DEG C to 930 DEG C.
3. the heat treating method of hook tongue according to claim 2, is characterized in that, described quenching temperature is between 900 DEG C to 920 DEG C.
4. the heat treating method of the hook tongue according to Claims 2 or 3, is characterized in that, comprises: described hook tongue is incubated 2 to 3 hours under described quenching temperature to quench treatment described in described hook tonguing row.
5. the heat treating method of hook tongue according to claim 1, is characterized in that, to the tempering temperature of temper described in described hook tonguing row between 560 DEG C to 640 DEG C.
6. the heat treating method of hook tongue according to claim 5, is characterized in that, described tempering temperature is between 620 DEG C to 640 DEG C.
7. the heat treating method of the hook tongue according to claim 5 or 6, is characterized in that, comprises: described hook tongue is incubated 3 to 4 hours under described tempering temperature to temper described in described hook tonguing row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511009142.5A CN105420453A (en) | 2015-12-28 | 2015-12-28 | Heat treatment method for coupler knuckle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511009142.5A CN105420453A (en) | 2015-12-28 | 2015-12-28 | Heat treatment method for coupler knuckle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105420453A true CN105420453A (en) | 2016-03-23 |
Family
ID=55498987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511009142.5A Pending CN105420453A (en) | 2015-12-28 | 2015-12-28 | Heat treatment method for coupler knuckle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105420453A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106906412A (en) * | 2017-03-28 | 2017-06-30 | 马钢(集团)控股有限公司 | A kind of high-intensity high-tenacity forges hook bolt steel and its heat treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000212691A (en) * | 1999-01-20 | 2000-08-02 | Kawasaki Steel Corp | Steel wire rod for cold forging and its production |
| CN101559555A (en) * | 2009-05-19 | 2009-10-21 | 重庆长征重工有限责任公司 | Forging method of coupler knuckle for railway vehicle |
| CN101880837A (en) * | 2010-06-13 | 2010-11-10 | 齐齐哈尔轨道交通装备有限责任公司 | Method for preparing steel |
| CN102953007A (en) * | 2011-08-25 | 2013-03-06 | 南车戚墅堰机车车辆工艺研究所有限公司 | Alloy cast steel, heat treatment method thereof, and truck traction buffer device manufactured from alloy cast steel |
-
2015
- 2015-12-28 CN CN201511009142.5A patent/CN105420453A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000212691A (en) * | 1999-01-20 | 2000-08-02 | Kawasaki Steel Corp | Steel wire rod for cold forging and its production |
| CN101559555A (en) * | 2009-05-19 | 2009-10-21 | 重庆长征重工有限责任公司 | Forging method of coupler knuckle for railway vehicle |
| CN101880837A (en) * | 2010-06-13 | 2010-11-10 | 齐齐哈尔轨道交通装备有限责任公司 | Method for preparing steel |
| CN102953007A (en) * | 2011-08-25 | 2013-03-06 | 南车戚墅堰机车车辆工艺研究所有限公司 | Alloy cast steel, heat treatment method thereof, and truck traction buffer device manufactured from alloy cast steel |
Non-Patent Citations (3)
| Title |
|---|
| 张慧杰 等: "列车车钩用ZG25MnCrNiMo钢的冲击性能研究", 《金属热处理》 * |
| 杨满: "《热处理工艺参数手册》", 31 January 2013, 机械工业出版社 * |
| 符寒光: "《耐磨材料500问》", 30 October 2011, 机械工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106906412A (en) * | 2017-03-28 | 2017-06-30 | 马钢(集团)控股有限公司 | A kind of high-intensity high-tenacity forges hook bolt steel and its heat treatment method |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 161002 Qigihar City, Heilongjiang province Tiefeng District Plant Road No. 36 Applicant after: CRRC QIQIHAR VEHICLE CO., LTD. Address before: 161002 Qigihar City, Heilongjiang province Tiefeng District Plant Road No. 36 Applicant before: Qiqihar Rail Traffic Equipment Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160323 |
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| RJ01 | Rejection of invention patent application after publication |