CN104726675B - A kind of heat treatment method of automobile-used abnormity snap close - Google Patents
A kind of heat treatment method of automobile-used abnormity snap close Download PDFInfo
- Publication number
- CN104726675B CN104726675B CN201510180618.5A CN201510180618A CN104726675B CN 104726675 B CN104726675 B CN 104726675B CN 201510180618 A CN201510180618 A CN 201510180618A CN 104726675 B CN104726675 B CN 104726675B
- Authority
- CN
- China
- Prior art keywords
- snap close
- automobile
- heated
- semi
- finished product
- 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.)
- Active
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010791 quenching Methods 0.000 claims abstract description 25
- 230000000171 quenching effect Effects 0.000 claims abstract description 21
- 238000005496 tempering Methods 0.000 claims abstract description 21
- 238000000137 annealing Methods 0.000 claims abstract description 10
- 206010020843 Hyperthermia Diseases 0.000 claims abstract description 9
- 230000036031 hyperthermia Effects 0.000 claims abstract description 9
- 238000007493 shaping process Methods 0.000 claims abstract description 9
- 230000000699 topical effect Effects 0.000 claims abstract description 6
- 230000002631 hypothermal effect Effects 0.000 claims abstract description 5
- 239000011265 semifinished product Substances 0.000 claims description 24
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 16
- 230000006698 induction Effects 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000005495 investment casting Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The present invention relates to the heat treatment method of a kind of automobile-used abnormity snap close and the product obtaining thereof, comprise the steps: automobile-used abnormity snap close shaping；Quenching；Tempering；Differential annealing；Selective hardening；Localized hyperthermia is tempered；The steps such as topical hypothermia's tempering and the control of design parameter so that the special-shaped snap close transverse load, longitudinal loading and the fatigue strength that obtain are greatly improved.
Description
Technical field
The invention belongs to alloy Heat-Treatment of Steel and automobile-used field of components, particularly relate to a kind of automobile-used abnormity snap close and heat treatment method thereof.
Background technology
Current China has become the first in the world big automobile production state and country of consumption, but the high-end accessory of the precision of proprietary technology is still few.Automobile side-door snap close is used to engage with car door lock body, and its intensity is to ensure that the very important factor of automotive safety.Owing to this snap close is special-shaped, therefore for its strength control relative difficult, the conventional overall employing SCM435 steel alloy of current snap close, i.e. used as finished product by zinc-plated after the heat treatment mode of quenching+tempering, but its fatigue strength does not reaches far away client and uses requirement, if but after emphasizing fatigue strength, its tensile strength and toughness again it cannot be guaranteed that.
Content of the invention
An object of the present invention is to propose the heat treatment method of a kind of automobile-used abnormity snap close.
The two of the purpose of the present invention are to propose a kind of automobile-used abnormity snap close.
Realize especially by following technological means:
The heat treatment method of a kind of automobile-used abnormity snap close, comprises the steps:
(1) automobile-used abnormity snap close shaping: automobile-used abnormity snap close shaping is obtained semi-finished product by the operation of melting, hot investment casting；
(2) quench: heat in the semi-finished product that step (1) obtains are inserted resistance furnace, with stove, semi-finished product are heated to 320 ~ 380 DEG C, insulation 10 ~ 18min, then proceed to the quick mode of heating with 50 ~ 58 DEG C/s and semi-finished product are heated to 850 ~ 890 DEG C, after insulation 28 ~ 38min, carry out oil quenching, after oil quenching to normal temperature, surface of semi-finished is carried out；
(3) it is tempered: inserting in tempering furnace by the semi-finished product after quenching cleaning, being heated to 460 ~ 480 DEG C, be incubated 1 ~ 1.5 hour, air cooling is to room temperature；
(4) differential annealing: the mode that latch portion uses local induction heating being heated to 800 ~ 860 DEG C, being incubated 1 ~ 1.5 hour, stove is as cold as room temperature；
(5) selective hardening: use the mode of local induction heating to be heated to 850 ~ 890 DEG C the latch portion through differential annealing, after insulation 20 ~ 30min, chilling of spraying water；
(6) localized hyperthermia's tempering: using the mode of local induction heating to be heated to 460 ~ 510 DEG C the latch portion through selective hardening, being incubated 0.5 ~ 1 hour, air cooling is to room temperature；
(7) topical hypothermia's tempering: the mode that the latch portion being tempered through localized hyperthermia uses local induction heating is heated to 150 ~ 180 DEG C, is incubated 0.5 ~ 1.2 hour, air cooling to room temperature, the automobile-used abnormity snap close after being heat-treated.
As preferably, the automobile-used abnormity snap close after heat treatment is obtained high strength special-shaped snap close finished product after electrogalvanizing process.
As preferably, in step (2), with stove, semi-finished product are heated to 360 DEG C, are incubated 15min, then proceed to the quick mode of heating with 56 DEG C/s and semi-finished product are heated to 868 DEG C, after insulation 32min, carry out oil quenching.
As preferably, described latch portion uses SCM435 steel alloy.
As preferably, the composition of described SCM435 steel alloy is by mass percentage: C:0.3 ~ 0.38%；Si:0.15 ~ 0.35%；Mn:0.6 ~ 0.9%；Cr:0.6 ~ 1.0%；Mo:0.11 ~ 0.30%；RE:0.02 ~ 0.031%；P≤0.02%；S≤0.01%, balance of Fe and inevitable impurity.
A kind of automobile-used abnormity snap close, uses aforementioned heat treatment method to prepare.
As preferably, the composition of described SCM435 steel alloy is by mass percentage: C:0.32%；Si:0.20%；Mn:0.72%；Cr:0.88%；Mo:0.19%；RE:0.025%；P:0.01%；S:0.002%, balance of Fe and inevitable impurity.
Effect of the invention is that:
1, by the heat treatment overall flow of automobile-used abnormity snap close is improved so that on the premise of automobile-used abnormity latches in guarantee conventional intensity, fatigue strength is greatly improved；
2 ,+the heat treatment mode of quenching+tempering of being annealed by creative the carrying out of the steel alloy after quenching+tempering is processed so that steel alloy microstructure is more uniform and stable, and bulk strength, toughness have obtained significantly improving；
3, by carrying out the annealing+quenching+tempering processing mode of local to the latch portion of the special-shaped snap close after integral quenching+tempering so that steel alloy bulk strength, toughness are improved；
4, topical treatment process carries out to the workpiece after quenching the tempering of high tempering+lonneal different temperatures twice so that steel alloy microstructure is more uniform and stable, and intensity is improved；
5, by the composition of SCM435 steel alloy being adjusted so that it is more suitable for heat treatment, significantly refined by making steel alloy microcosmic crystal grain to the interpolation of rare earth RE, more adapted to above-mentioned heat treatment mode.
Detailed description of the invention
Embodiment
1
The heat treatment method of a kind of automobile-used abnormity snap close, comprises the steps:
(1) automobile-used abnormity snap close shaping: by the operation of melting, hot investment casting, automobile-used abnormity snap close shaping being obtained semi-finished product, described abnormity snap close all uses SCM435 steel alloy.
(2) quench: heat in the semi-finished product that step (1) obtains are inserted resistance furnace, with stove, semi-finished product are heated to 330 DEG C, insulation 12min, then proceed to the quick mode of heating with 53 DEG C/s and semi-finished product are heated to 872 DEG C, after insulation 31min, carry out oil quenching, after oil quenching to normal temperature, surface of semi-finished is carried out；
(3) it is tempered: inserting in tempering furnace by the semi-finished product after quenching cleaning, being heated to 478 DEG C, be incubated 1.2 hours, air cooling is to room temperature；
(4) differential annealing: the mode that latch portion uses local induction heating being heated to 852 DEG C, being incubated 1.2 hours, stove is as cold as room temperature；
(5) selective hardening: use the mode of local induction heating to be heated to 872 DEG C the latch portion through differential annealing, after insulation 26min, chilling of spraying water；
(6) localized hyperthermia's tempering: using the mode of local induction heating to be heated to 490 DEG C the latch portion through selective hardening, being incubated 0.8 hour, air cooling is to room temperature；
(7) topical hypothermia's tempering: the mode that the latch portion being tempered through localized hyperthermia uses local induction heating is heated to 171 DEG C, is incubated 0.9 hour, air cooling to room temperature, the automobile-used abnormity snap close after being heat-treated.
(8) zinc-plated: the automobile-used abnormity snap close after heat treatment is obtained high strength special-shaped snap close finished product after electrogalvanizing process.
Embodiment
2
The heat treatment method of a kind of automobile-used abnormity snap close, comprises the steps:
(1) automobile-used abnormity snap close shaping: by the operation of melting, hot investment casting, automobile-used abnormity snap close shaping being obtained semi-finished product, described latch portion uses SCM435 steel alloy, and jam plate uses 20# steel；
(2) quench: heat in the semi-finished product that step (1) obtains are inserted resistance furnace, with stove, semi-finished product are heated to 360 DEG C, insulation 16min, then proceed to the quick mode of heating with 56 DEG C/s and semi-finished product are heated to 860 DEG C, after insulation 30min, carry out oil quenching, after oil quenching to normal temperature, surface of semi-finished is carried out；
(3) it is tempered: inserting in tempering furnace by the semi-finished product after quenching cleaning, being heated to 469 DEG C, be incubated 1 hour, air cooling is to room temperature；
(4) differential annealing: the mode that latch portion uses local induction heating being heated to 840 DEG C, being incubated 1.5 hours, stove is as cold as room temperature；
(5) selective hardening: use the mode of local induction heating to be heated to 860 DEG C the latch portion through differential annealing, after insulation 28min, chilling of spraying water；
(6) localized hyperthermia's tempering: using the mode of local induction heating to be heated to 500 DEG C the latch portion through selective hardening, being incubated 1 hour, air cooling is to room temperature；
(7) topical hypothermia's tempering: the mode that the latch portion being tempered through localized hyperthermia uses local induction heating is heated to 170 DEG C, is incubated 1.0 hours, air cooling to room temperature, the automobile-used abnormity snap close after being heat-treated.
(8) zinc-plated: the automobile-used abnormity snap close after heat treatment is obtained high strength special-shaped snap close finished product after electrogalvanizing process.
Embodiment
3
Lock pin uses SCM435 steel alloy, and its composition is by mass percentage: C:0.36%；Si:0.22%；Mn:0.71%；Cr:0.92%；Mo:0.21%；RE:0.028%；P≤0.01%；S≤0.005%, balance of Fe and inevitable impurity.The heat treatment method using embodiment 2 processes and obtains, by testing longitudinal loading, transverse load, obtaining its longitudinal loading when full lock is 28000N, and transverse load is 25000N, and its fatigue strength is also greatly improved, it is qualified that 130,000 train door knobs hit experimental test.
Embodiment
4
The special-shaped snap close that embodiment 1 obtains, by testing longitudinal loading, transverse load, obtaining its longitudinal loading when full lock and being more than 26000N, transverse load is more than 25000N, and its fatigue strength is also greatly improved, it is qualified that 120,000 train door knobs hit experimental test.
Claims (6)
1. the heat treatment method of an automobile-used abnormity snap close, it is characterised in that comprise the steps:
(1) automobile-used abnormity snap close shaping: automobile-used abnormity snap close shaping is obtained semi-finished product by the operation of melting, hot investment casting；
(2) quench: heat in the semi-finished product that step (1) obtains are inserted resistance furnace, with stove, semi-finished product are heated to 320 ~ 380 DEG C, insulation 10 ~ 18min, then proceed to the quick mode of heating with 50 ~ 58 DEG C/s and semi-finished product are heated to 850 ~ 890 DEG C, after insulation 28 ~ 38min, carry out oil quenching, after oil quenching to normal temperature, surface of semi-finished is carried out；
(3) it is tempered: inserting in tempering furnace by the semi-finished product after quenching cleaning, being heated to 460 ~ 480 DEG C, be incubated 1 ~ 1.5 hour, air cooling is to room temperature；
(4) differential annealing: the mode that latch portion uses local induction heating being heated to 800 ~ 860 DEG C, being incubated 1 ~ 1.5 hour, stove is as cold as room temperature；
(5) selective hardening: use the mode of local induction heating to be heated to 850 ~ 890 DEG C the latch portion through differential annealing, after insulation 20 ~ 30min, chilling of spraying water；
(6) localized hyperthermia's tempering: using the mode of local induction heating to be heated to 460 ~ 510 DEG C the latch portion through selective hardening, being incubated 0.5 ~ 1 hour, air cooling is to room temperature；
(7) topical hypothermia's tempering: the mode that the latch portion being tempered through localized hyperthermia uses local induction heating is heated to 150 ~ 180 DEG C, is incubated 0.5 ~ 1.2 hour, air cooling to room temperature, the automobile-used abnormity snap close after being heat-treated；
Described latch portion uses SCM435 steel alloy.
2. the heat treatment method of automobile-used abnormity snap close according to claim 1, it is characterised in that the automobile-used abnormity snap close after heat treatment is obtained high strength special-shaped snap close finished product after electrogalvanizing process.
3. the heat treatment method of automobile-used abnormity snap close according to claim 1 and 2, it is characterised in that in step (2), with stove, semi-finished product are heated to 360 DEG C, are incubated 15min, then proceed to the quick mode of heating with 56 DEG C/s and semi-finished product are heated to 868 DEG C, after insulation 32min, carry out oil quenching.
4. the heat treatment method of automobile-used abnormity snap close according to claim 3, it is characterised in that the composition of described SCM435 steel alloy is by mass percentage: C:0.3 ~ 0.38%；Si:0.15 ~ 0.35%；Mn:0.6 ~ 0.9%；Cr:0.6 ~ 1.0%；Mo:0.11 ~ 0.30%；RE:0.02 ~ 0.031%；P≤0.02%；S≤0.01%, balance of Fe and inevitable impurity.
5. an automobile-used abnormity snap close, it is characterised in that use heat treatment method described in any one of claim 1 ~ 4 to prepare.
6. automobile-used abnormity snap close according to claim 5, it is characterised in that the composition of described SCM435 steel alloy is by mass percentage: C:0.32%；Si:0.20%；Mn:0.72%；Cr:0.88%；Mo:0.19%；RE:0.025%；P:0.01%；S:0.002%, balance of Fe and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510180618.5A CN104726675B (en) | 2015-04-16 | 2015-04-16 | A kind of heat treatment method of automobile-used abnormity snap close |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510180618.5A CN104726675B (en) | 2015-04-16 | 2015-04-16 | A kind of heat treatment method of automobile-used abnormity snap close |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104726675A CN104726675A (en) | 2015-06-24 |
| CN104726675B true CN104726675B (en) | 2016-10-05 |
Family
ID=53451085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510180618.5A Active CN104726675B (en) | 2015-04-16 | 2015-04-16 | A kind of heat treatment method of automobile-used abnormity snap close |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104726675B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108728626A (en) * | 2018-07-02 | 2018-11-02 | 洛阳Lyc轴承有限公司 | The heat treatment method of 35CrMo steel automobile door lock catchs |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534388A (en) * | 2011-12-07 | 2012-07-04 | 内蒙古包钢钢联股份有限公司 | Rare earth containing H2S-corrosion resistance petroleum casing pipe and production method thereof |
-
2015
- 2015-04-16 CN CN201510180618.5A patent/CN104726675B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534388A (en) * | 2011-12-07 | 2012-07-04 | 内蒙古包钢钢联股份有限公司 | Rare earth containing H2S-corrosion resistance petroleum casing pipe and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104726675A (en) | 2015-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11293072B2 (en) | Process for on-line quenching of seamless steel tube using residual heat and manufacturing method | |
| CN103820729B (en) | Titanium reinforced high-cobalt martensitic aged anti-corrosion ultrahigh-strength steel and preparation method | |
| CN104532154A (en) | High-hardness high-polishing pre-hardening plastic die steel and manufacture technology thereof | |
| CN106811580A (en) | A kind of annealing process of H13 hot die steels | |
| CN105861942B (en) | A kind of cold work die steel and its preparation technology | |
| CN109266970A (en) | High-nitrogen, high-chromium plastic die steel and its smelting and heat treatment method | |
| CN104120341A (en) | Cr5 steel forging work roll for rolling extremely thin materials and preparation method thereof | |
| CN107312912A (en) | Improve the heat treatment method of steel-casting yield strength | |
| CN103898283A (en) | Tempering heat treatment process of high-strength steel | |
| CN105695679B (en) | A kind of isothermal quenching technique of the rock-drill steel XGQ25 with the distribution of high tenacity heterogeneous structure | |
| US8377235B2 (en) | Process for forming steel | |
| CN104745939B (en) | A kind of automobile-used abnormity snap close | |
| CN100469903C (en) | 6CrNiSiMnMoV steel hardness gradient tempering heat treatment processing method | |
| CN104726675B (en) | A kind of heat treatment method of automobile-used abnormity snap close | |
| CN105886740A (en) | Heat treatment method for carrying out isothermal annealing on railway vehicle axle in advance | |
| CN105950991B (en) | A kind of cupric height polishing mould steel and its preparation technology | |
| CN108220561A (en) | A kind of method for refining 20CrMoA forging autstenitic grain sizes | |
| CN104694845B (en) | The heat treatment method of a kind of bumper and this bumper | |
| CN105369022B (en) | A kind of method that 2Cr12NiMo1W1V forging carries out crystal grain refinement in process of production | |
| CN104087737A (en) | Heat treatment method of long-shaft forging made of steel 34CrNi3Mo | |
| CN104120342A (en) | Roll and preparation method thereof | |
| CN104988295A (en) | Heat treatment method for improving medium-carbon non-quenched and tempered steel connecting rod cracking performance | |
| CN109797275A (en) | It forges high manganese steel frog manganese and pitches the tough heat treatment production method of edema with the heart involved | |
| CN111154956B (en) | Heat treatment method of medium-carbon low-alloy steel | |
| CN104694834B (en) | Thermal treatment method of high-strength corrosion resistant steel special for anti-theft window frame |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Han Hongwei Inventor after: Qian Hege Inventor before: Wang Wenjiao |
|
| COR | Change of bibliographic data | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160901 Address after: 243000 Anhui city of Ma'anshan province Kangtai mountain rain Jiayuan 1 Building No. 1805 Applicant after: Ma'anshan Hengda Mould Material Co., Ltd. Address before: 102218 Beijing Changping District Tiantong Xiyuan two district 18-4 Applicant before: Wang Wenjiao |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190508 Address after: 262302 Beishanqian Village, Songbai Town, Wulian County, Rizhao City, Shandong Province Patentee after: Wulian Shisheng Machinery Co., Ltd. Address before: No. 1805, Building 1, Kangtai Jiayuan, Yushan District, Ma'anshan City, Anhui Province Patentee before: Ma'anshan Hengda Mould Material Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 276800 song Bai Zhen Bei Shan Cun, Wulian County, Rizhao City, Shandong Province Patentee after: Shandong Shisheng Machinery Co., Ltd Address before: 262302 Beishanqian Village, Songbai Town, Wulian County, Rizhao City, Shandong Province Patentee before: Wulian Shisheng Machinery Co.,Ltd. |