CN106191391A - A kind of heat treatment method improving collapsible dist collar obdurability - Google Patents
A kind of heat treatment method improving collapsible dist collar obdurability Download PDFInfo
- Publication number
- CN106191391A CN106191391A CN201610799759.XA CN201610799759A CN106191391A CN 106191391 A CN106191391 A CN 106191391A CN 201610799759 A CN201610799759 A CN 201610799759A CN 106191391 A CN106191391 A CN 106191391A
- Authority
- CN
- China
- Prior art keywords
- obdurability
- heat treatment
- treatment method
- martensite
- method improving
- 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
-
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of heat treatment method improving collapsible dist collar obdurability, its technological process is the acquisition tiny martensite tissue that quenched the most completely by spacer, then carries out two-phase section incomplete quenching, temper.The microscopic structure that spacer carries out incomplete heating quenching acquisition at ferrite and austenite two-phase section is lath martensite and a number of uniform fine ferrite, martensite has the advantages that intensity is high, and the crystal grain that obtains after incomplete quenching is tiny, crystal boundary and crystal face quantity are greatly improved, thus improve the intensity of material, and the ferrite obtained has, and intensity is low, the feature of good toughness, complementation is formed with martensite, therefore material has good obdurability, makes spacer in use be greatly prolonged the life-span.
Description
Technical field
The invention belongs to technical field of metal heat treatment, relate to a kind of heat treatment method improving collapsible dist collar obdurability.
Background technology
Existing all kinds of automobile axle collapsible dist collars use mild steel to be fabricated by.Collapsible dist collar not only needs higher strong
Degree, also to have certain toughness, and the own intensity of low-carbon steel material manufacturing collapsible dist collar use is difficult to meet its military service and wants
Ask.Traditional way is direct use or heating quenching, temper after punch forming, and the spacer obtained is difficult to control requiring
In the range of.
Therefore, collapsible dist collar heat treatment technics is also treated to improve further.
Summary of the invention
It is an object of the present invention to provide a kind of heat treatment method improving collapsible dist collar obdurability.
The present invention is achieved in that
Quench the most completely acquisition tiny martensite tissue by mild steel, then carries out two-phase section incomplete quenching, tempering
Process.Concrete technology flow process is: mild steel is heated to 920 ± 10 DEG C of (insulation 10 ± 5min) water-cooleds and is heated to room temperature
840 ± 10 DEG C of (insulation 10 ± 5min) water-cooleds are to room temperature tempering (200 ± 10 DEG C, time 90 ± 10min) air cooling to room
Temperature.
The microscopic structure that mild steel carries out incomplete heating quenching acquisition at ferrite and austenite two-phase section is lath horse
Family name's body and a number of uniform fine ferrite, then it is higher the intensity of mild steel can not only to be made to be maintained at after tempered process
Level, it is also possible to improve the toughness of mild steel.
Mild steel carries out incomplete heating quenching at ferrite and austenite two-phase section (α+γ) can keep higher strong
Degree is that heating-up temperature is relatively low owing to the original structure dispersion of last quenching is relatively big, so that austenite crystal is tiny,
In addition existing a number of tiny scattered ferrite exists, and makes the quantity of the crystal boundary in steel and phase boundary significantly increase. pass through
Electron microscope observation shows, in the microscopic structure of two-phase section heating quenching, ferrite has compared with the phase contact area of austenite
Big 10-15 times of original austenite crystal prevention area in full hardened steel, owing to keeping between the crystal grain diameter (d) in two phase alloys and intensity
Petch formulaRelation, therefore two-phase section quenching can improve the intensity of mild steel.
And can make mild steel have good toughness be due in mild steel metallographic structure at room temperature containing uniformly
The ferrite of distribution.Owing to ferrite phosphorus content is low, therefore intensity is low, and plasticity and toughness are high, when part bears pressure, locally
Concentrate stress peak, can relax because of ferrite generation plastic deformation, micro-crack also can at ferrite hindered and
Delay of progression, thus improve the toughness of steel.
Additionally, from ferrum-Carbon balance phasor, we learn, quench in ferrite and austenitic duplex district, obtain ferrite and
The ratio of lath martensite changes with heating-up temperature change, thus steel can show different mechanical properties, meets not
Same service demand.
Compared with existing low-carbon steel material heat treatment method, existing low-carbon steel material heat treatment method is direct quenching add-back
Fire, stress-strain diagram is beyond the requirement of 65-70MPa, and enough but toughness is unsatisfactory for using requirement to hardness, and locates through this heat
After reason method, the obdurability of material can reach requirement.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention 1 Elastic spacer whole Technology for Heating Processing temperature time curve figure；
Fig. 2 is the embodiment of the present invention 1 Elastic spacer metallographic structure figure at the incomplete heating quenching of two-phase section；
Fig. 3 is the metallographic structure figure that the embodiment of the present invention 1 Elastic spacer quenches completely；
Fig. 4 is the embodiment of the present invention 1 Elastic spacer requirement stress-strain curve diagram；
Fig. 5 is the stress-strain curve diagram after the embodiment of the present invention 1 Elastic spacer uses this heat treatment method.
Detailed description of the invention
The present invention can be made progressive description by the following examples by the present invention, but, the scope of the present invention is also
It is not limited to following embodiment.
Embodiment 1:
Quench the most completely acquisition tiny martensite tissue by collapsible dist collar, then carry out two-phase section incomplete quenching, return
Fire processes.Concrete technology flow process is: collapsible dist collar is heated to 920 ± 10 DEG C of (insulation 10 ± 5min) water-cooleds and adds to room temperature
Heat is tempered (200 ± 10 DEG C, time 90 ± 10min) air cooling to 840 ± 10 DEG C of (insulation 10 ± 5min) water-cooleds to room temperature
To room temperature.
Metallurgical structure in Fig. 2 is lath martensite and a number of uniform fine ferrite, due to ferrite
Relatively low with austenite two-phase section hardening heat, so that austenite crystal is tiny, existing a number of tiny dispersion in addition
Ferrite exist so that crystal boundary and the quantity of phase boundary in collapsible dist collar increase significantly.
In Fig. 3, metallurgical structure is the most tiny martensitic structure, and martensitic structure has strength high toughness
The feature of difference, carries out incomplete quenching the most completely again and makes tissue separate out a number of fine ferrite increase elasticity after quenching
The toughness of spacer.
Fig. 4 is the stress-strain curve diagram of collapsible dist collar requirement, it is desirable to when collapsible dist collar stress is between 60-75MPa
Disclosure satisfy that use requirement.
Fig. 5 is the stress-strain curve diagram after collapsible dist collar uses this heat treatment method, by test record elastic every
Set stress is 63MPa, meets use requirement.
All kinds of automobile axle collapsible dist collars that embodiment manufactures for low carbon steel pipe, can make different stress-strain diagram want
The part asked is attained by quality standard.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (3)
1. the heat treatment method improving collapsible dist collar obdurability, it is characterised in that mild steel is quenched the most completely and obtains
Obtain tiny martensite tissue, then carry out two-phase section incomplete quenching acquisition lath martensite and a number of uniform tiny ferrum element
Body, last temper.
A kind of heat treatment method improving collapsible dist collar obdurability the most according to claim 1, it is characterised in that concrete work
Process flow is: mild steel is heated to 920 ± 10 DEG C, is incubated 10 ± 5min, and water-cooled, to room temperature, is again heated to 840 ± 10 DEG C, protects
Temperature 10 ± 5min, then water-cooled is to room temperature, then it is tempered to 200 ± 10 DEG C, retention time 90 ± 10min, last air cooling is to room temperature.
A kind of heat treatment method improving collapsible dist collar obdurability the most according to claim 2, it is characterised in that elastic
The range of stress of spacer requires in 60-75MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610799759.XA CN106191391A (en) | 2016-08-31 | 2016-08-31 | A kind of heat treatment method improving collapsible dist collar obdurability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610799759.XA CN106191391A (en) | 2016-08-31 | 2016-08-31 | A kind of heat treatment method improving collapsible dist collar obdurability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106191391A true CN106191391A (en) | 2016-12-07 |
Family
ID=58066344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610799759.XA Pending CN106191391A (en) | 2016-08-31 | 2016-08-31 | A kind of heat treatment method improving collapsible dist collar obdurability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106191391A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101020950A (en) * | 2007-02-08 | 2007-08-22 | 江西江铃底盘股份有限公司 | Heat treatment process for thin-wall low carbon steel part |
| CN101671772A (en) * | 2009-09-29 | 2010-03-17 | 燕山大学 | Method for preparing ultra-fine grained ferrite and nano-carbide low-carbon steel plate |
| CN101671771A (en) * | 2009-09-29 | 2010-03-17 | 燕山大学 | Method for preparing high-strength and high-plasticity ultra-fine grained ferrite and nano-carbide low-carbon steel |
| CN101717887A (en) * | 2009-11-13 | 2010-06-02 | 北京科技大学 | Rotary austenite toughening-based low-temperature steel and method for preparing same |
| CN102051453A (en) * | 2010-12-29 | 2011-05-11 | 西安航天精密机电研究所 | Method for quenching small-size No. 45 steel parts |
| CN102943169A (en) * | 2012-12-10 | 2013-02-27 | 北京科技大学 | Quenching and annealing preparation method of ultrahigh-strength thin steel plate for automobiles |
| CN104928592A (en) * | 2015-07-17 | 2015-09-23 | 上海交通大学 | High-strength low-temperature-resistant steel and heat processing technology thereof |
-
2016
- 2016-08-31 CN CN201610799759.XA patent/CN106191391A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101020950A (en) * | 2007-02-08 | 2007-08-22 | 江西江铃底盘股份有限公司 | Heat treatment process for thin-wall low carbon steel part |
| CN101671772A (en) * | 2009-09-29 | 2010-03-17 | 燕山大学 | Method for preparing ultra-fine grained ferrite and nano-carbide low-carbon steel plate |
| CN101671771A (en) * | 2009-09-29 | 2010-03-17 | 燕山大学 | Method for preparing high-strength and high-plasticity ultra-fine grained ferrite and nano-carbide low-carbon steel |
| CN101717887A (en) * | 2009-11-13 | 2010-06-02 | 北京科技大学 | Rotary austenite toughening-based low-temperature steel and method for preparing same |
| CN102051453A (en) * | 2010-12-29 | 2011-05-11 | 西安航天精密机电研究所 | Method for quenching small-size No. 45 steel parts |
| CN102943169A (en) * | 2012-12-10 | 2013-02-27 | 北京科技大学 | Quenching and annealing preparation method of ultrahigh-strength thin steel plate for automobiles |
| CN104928592A (en) * | 2015-07-17 | 2015-09-23 | 上海交通大学 | High-strength low-temperature-resistant steel and heat processing technology thereof |
Non-Patent Citations (1)
| Title |
|---|
| 万克仁: ""双相区淬火应用于汽车后桥的弹性隔套的工艺"", 《第十五届华东地区热处理年会暨华东地区热处理年会三十周年纪念活动论文摘要集》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106222544B (en) | Annular forging piece and its heat treatment method | |
| CN101831595B (en) | Rapid cooling thermal treatment method of 21/4Cr-1Mo-1/4V steel forging and automatic temperature-control inflation three-dimensional circulating water | |
| JP5288259B2 (en) | Pre-quenching method and quenching method for martensitic tool steel | |
| JPH0448049A (en) | Leaf spring hose band and its manufacture | |
| CN106119495B (en) | A kind of manufacturing method of cold rolling medium high carbon structural steel | |
| CN105088081B (en) | The manufacturing process of stabiliser bar | |
| CN106947919A (en) | A kind of high-toughness hot forming steel and its production method | |
| CN112703267A (en) | Wire rod for cold heading, worked product using the same, and method for manufacturing the same | |
| CN103740913B (en) | High temperature forging Martensite Stainless Steel heat treating method | |
| CN109487061A (en) | The heat treatment method of martensitic precipitation 06Cr15Ni5Cu2Ti | |
| CN107916364A (en) | A kind of hot die steel | |
| CN105969945A (en) | Quenching and high temperature tempering process of 20Cr13 middle piece for pump | |
| Li et al. | Effects of heat treatment on the microstructures and mechanical properties of a new type of nitrogen-containing die steel | |
| CN107723418A (en) | A kind of heat treatment method of 45# material bars forging comprehensive mechanical property | |
| CN104357747A (en) | Microalloyed manganese boron alloy steel as well as thermal treatment method and application thereof | |
| CN108165883A (en) | 20crmnmo steel and its processing method | |
| CN103998640B (en) | There is spring wire rod and the steel wire of excellent corrosion protection, spring steel wire, and the method manufacturing spring | |
| CN106555132B (en) | A kind of high-carbon-chromium bearing steel Technology for Heating Processing | |
| CN106191391A (en) | A kind of heat treatment method improving collapsible dist collar obdurability | |
| CN106521310B (en) | A kind of quartering hammer piston rod steel and its Technology for Heating Processing | |
| CN114787409B (en) | Wire rod for high-strength cold heading quality steel having excellent hydrogen embrittlement resistance and method for manufacturing same | |
| KR100957306B1 (en) | Forging steel using high frequency heat treatment and method for manufacturing the same | |
| CN105358726A (en) | Coil spring, and method for manufacturing same | |
| CN107779566A (en) | A kind of heat treatment method of high-intensity high-tenacity 40CrNiMo forging | |
| CN114507769A (en) | Warm forging waste heat isothermal normalizing method for 18CrNiMo7-6 steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161207 |