CN107641695A - A kind of 55Cr3 Heat-Treatments of Steel method - Google Patents
A kind of 55Cr3 Heat-Treatments of Steel method Download PDFInfo
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- CN107641695A CN107641695A CN201710858968.1A CN201710858968A CN107641695A CN 107641695 A CN107641695 A CN 107641695A CN 201710858968 A CN201710858968 A CN 201710858968A CN 107641695 A CN107641695 A CN 107641695A
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Abstract
The present invention relates to a kind of heat treatment method for the alloy bar material that trade mark is 55Cr3, its key step includes：55Cr3 bars are heated to 900 ± 20 DEG C, soaking time carries out thermoforming after being 15 ± 5min；Quenched again after thermoforming, hardening heat is controlled at 850 ± 15 DEG C, and quenching oil temperature control is at 50 ± 20 DEG C；Temper is carried out under the conditions of 515 ± 5 DEG C, tempering time ensures in more than 120min.Proved by production practices, the heat treatment method of the present invention, 55Cr3 bars acquisition good strength, plasticity, hardness and fatigue behaviour, the metallographic structure of the automobile stabilizer bar produced using 55Cr3 alloy bar material as raw material and fatigue life can be made to be satisfied by technical requirements.
Description
Technical field
The invention belongs to metal heat treatmet field, is related to a kind of heat treatment method, more particularly at the heat of bar 55Cr3 steel
Reason method.
Background technology
55Cr3 steel belongs to moral mark spring steel, mainly for the manufacture of automobile stabilizer bar.Stabiliser bar is also known as sway bar, is automobile
The steady of operation is improved when the important safety part in independent suspension system, reducing in automobile turning and turn to vibration, or meeting obstructions
It is qualitative, ensure comfortableness and driving safety, mainly reversed in work, extruding and shearing force.
At present, bar 55Cr3 steel improves the intensity of material, plasticity etc. using the heat treatment method of quenching+tempering.But pass through
Often because heat treatment parameter sets unreasonable, 55Cr3 steel is caused to produce abnormal structure or phenomena such as poor mechanical property, most final decline
The low fatigue life of stabiliser bar.For example, heating-up temperature is too high, cause austenite to be roughened, reduce the plasticity of 55Cr3 steel, even
Cause the generation of hardening flaw；Hardening heat is too low, causes the generation of the abnormal structures such as ferrite or bainite, reduces
Intensity of 55Cr3 steel etc..The invention provides a kind of heat treatment method of the quenching+tempering of 55Cr3 steel, has bar 55Cr3
There is good combination property, stabiliser bar has higher fatigue life.
The content of the invention
It is an object of the invention to provide a kind of 55Cr3 Heat-Treatments of Steel method, utilizes the heat treatment method, 55Cr3 steel
Good intensity and plasticity can be obtained：Tensile strength is 1350~1450MPa, and elongation is 14~18%, and the contraction percentage of area is
35~40%, hardness is 40~45HRC.
For achieving the above object, the present invention adopts the following technical scheme that：
A kind of 55Cr3 Heat-Treatments of Steel method, is comprised the steps of：
(1) 55Cr3 bars are heated to 900 ± 20 DEG C using intermediate frequency furnace, soaking time is 15 ± 5min；
(2) 55Cr3 bars carry out thermoforming after going out intermediate frequency furnace, are then quenched, and hardening heat is 850 ± 15
℃；
(3) temper is carried out to 55Cr3 bars using net belt type tempering furnace, temperature is 515 ± 5 DEG C, during tempering
Between >=120min；
(4) after 55Cr3 bars go out net belt type tempering furnace, water cooling to room temperature.
Further, a kind of 55Cr3 Heat-Treatments of Steel method, the specifications of the 55Cr3 bars in step (1) for Φ 10~
30mm。
Further, a kind of 55Cr3 Heat-Treatments of Steel method, the hardening media in step (2) is conventional quenching oil, and oil temperature is
50±20℃。
Compared with prior art, the present invention at least has the advantages that：
Heat treatment method provided by the invention, after being heat-treated 55Cr3 bars, metallographic structure is single tempering rope
The abnormal structure such as family name's body, no ferrite, bainite；Autstenitic grain size does not occur to be substantially roughened before and after heat treatment；Stabiliser bar
Fatigue life, 55Cr3 bars can obtain good intensity and plasticity more than 200,000 times.
Embodiment
The present invention is described further with reference to embodiment, but embodiment should not be construed as limiting the invention.
Embodiment 1
Φ 18.5mm 55Cr3 hot rolled rods are heated to 903 DEG C, soaking time 18min；Hardening heat is 861 DEG C,
Quenching Oil Temperature is 63 DEG C；Temperature is 516 DEG C, tempering time 131min, after going out net belt type tempering furnace, water cooling to room temperature.
Embodiment 2
Φ 20mm 55Cr3 hot rolled rods are heated to 910 DEG C, soaking time 16min；Hardening heat is 865 DEG C, is quenched
Kerosene oil temperature is 58 DEG C；Temperature is 513 DEG C, tempering time 125min, after going out net belt type tempering furnace, water cooling to room temperature.
Embodiment 3
Φ 24mm 55Cr3 hot rolled rods are heated to 918 DEG C, soaking time 13min；Hardening heat is 853 DEG C, is quenched
Kerosene oil temperature is 54 DEG C；Temperature is 515 DEG C, tempering time 120min, after going out net belt type tempering furnace, water cooling to room temperature.
The performance indications of material after the heat treatment of the different size 55Cr3 hot rolled rods of table 1
Mechanical property, Hardness Surveillance are carried out after different size 55Cr3 hot rolling materials are heat-treated, and examines different size
The fatigue life of 55Cr3 stabiliser bar products, as shown in table 1.Rm represents tensile strength in table 1, and A represents elongation after fracture, and Z is represented
The contraction percentage of area.From table 1 it follows that good mechanical property is respectively provided with after the heat treatment of different size 55Cr3 hot rolled rods,
Metallographic structure is tempered sorbite, tissue without exception；Stabiliser bar fatigue life is higher, more than 200,000 times.
, can be easily real for those skilled in the art although embodiment of the present invention is disclosed as above
Now other modification, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited to
Specific details.
Claims (3)
- A kind of 1. 55Cr3 Heat-Treatments of Steel method, it is characterised in that the method includes the steps of：(1) 55Cr3 bars are heated to 900 ± 20 DEG C using intermediate frequency furnace, soaking time is 15 ± 5min；(2) 55Cr3 bars carry out thermoforming after going out intermediate frequency furnace, are then quenched, and hardening heat is 850 ± 15 DEG C；(3) temper being carried out to 55Cr3 bars using net belt type tempering furnace, temperature is 515 ± 5 DEG C, tempering time >= 120min；(4) after 55Cr3 bars go out net belt type tempering furnace, water cooling to room temperature.
- 2. the rule of the 55Cr3 bars in a kind of 55Cr3 Heat-Treatments of Steel method according to claim 1, wherein step (1) Lattice are 10~30mm of Φ.
- 3. the hardening media in a kind of 55Cr3 Heat-Treatments of Steel method according to claim 1, wherein step (2) is general Logical quenching oil, oil temperature are 50 ± 20 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710858968.1A CN107641695A (en) | 2017-09-21 | 2017-09-21 | A kind of 55Cr3 Heat-Treatments of Steel method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710858968.1A CN107641695A (en) | 2017-09-21 | 2017-09-21 | A kind of 55Cr3 Heat-Treatments of Steel method |
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| CN107641695A true CN107641695A (en) | 2018-01-30 |
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| CN201710858968.1A Pending CN107641695A (en) | 2017-09-21 | 2017-09-21 | A kind of 55Cr3 Heat-Treatments of Steel method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735690A (en) * | 2018-12-24 | 2019-05-10 | 天津市大港汽车配件弹簧厂 | Stabiliser bar segmentally heating forms quenching technical |
| CN110438320A (en) * | 2019-08-30 | 2019-11-12 | 成都蒂森克虏伯富奥弹簧有限公司 | Hollow stabilizer rod of automobile embathes production method |
| CN114381587A (en) * | 2022-01-18 | 2022-04-22 | 张家港荣盛特钢有限公司 | Heat treatment method and application of high-carbon steel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS586923A (en) * | 1981-07-07 | 1983-01-14 | Aichi Steel Works Ltd | Production of spring steel of high resistance to permanent set in fatigue |
| CN1680057A (en) * | 2004-04-02 | 2005-10-12 | 鞍山市泰和连铸机械有限公司 | Dummy bar and production thereof |
| CN104400349A (en) * | 2014-11-06 | 2015-03-11 | 无锡市百顺机械厂 | Manufacturing technology of torsion bar spring |
| CN105483555A (en) * | 2015-12-11 | 2016-04-13 | 贵州大学 | Spring steel as well as preparation method thereof and thermal treatment method thereof |
| CN105525080A (en) * | 2014-09-30 | 2016-04-27 | 冀宣名 | Heat treatment technology for 60Si2CrVAT cold coiled springs |
-
2017
- 2017-09-21 CN CN201710858968.1A patent/CN107641695A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS586923A (en) * | 1981-07-07 | 1983-01-14 | Aichi Steel Works Ltd | Production of spring steel of high resistance to permanent set in fatigue |
| CN1680057A (en) * | 2004-04-02 | 2005-10-12 | 鞍山市泰和连铸机械有限公司 | Dummy bar and production thereof |
| CN105525080A (en) * | 2014-09-30 | 2016-04-27 | 冀宣名 | Heat treatment technology for 60Si2CrVAT cold coiled springs |
| CN104400349A (en) * | 2014-11-06 | 2015-03-11 | 无锡市百顺机械厂 | Manufacturing technology of torsion bar spring |
| CN105483555A (en) * | 2015-12-11 | 2016-04-13 | 贵州大学 | Spring steel as well as preparation method thereof and thermal treatment method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 林慧国等主编: "《袖珍世界钢号手册》", 31 January 2007 * |
| 樊东黎等: "《热处理技术数据手册》", 30 April 2006, 北京：机械工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735690A (en) * | 2018-12-24 | 2019-05-10 | 天津市大港汽车配件弹簧厂 | Stabiliser bar segmentally heating forms quenching technical |
| CN110438320A (en) * | 2019-08-30 | 2019-11-12 | 成都蒂森克虏伯富奥弹簧有限公司 | Hollow stabilizer rod of automobile embathes production method |
| CN114381587A (en) * | 2022-01-18 | 2022-04-22 | 张家港荣盛特钢有限公司 | Heat treatment method and application of high-carbon steel |
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