CN107164612A - A kind of heat treatment method for improving abrasion-resistant stee case hardness uniformity - Google Patents
A kind of heat treatment method for improving abrasion-resistant stee case hardness uniformity Download PDFInfo
- Publication number
- CN107164612A CN107164612A CN201710316755.6A CN201710316755A CN107164612A CN 107164612 A CN107164612 A CN 107164612A CN 201710316755 A CN201710316755 A CN 201710316755A CN 107164612 A CN107164612 A CN 107164612A
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- CN
- China
- Prior art keywords
- heat treatment
- steel plate
- quenching
- treatment method
- wear
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Classifications
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- 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
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- 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
-
- 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
- C21D2241/00—Treatments in a special environment
- C21D2241/01—Treatments in a special environment under pressure
Abstract
The present invention relates to technical field of wear-resistant steel, more particularly to a kind of heat treatment method for improving abrasion-resistant stee case hardness uniformity.The heat treatment method of the raising abrasion-resistant stee case hardness uniformity of the present invention, comprises the following steps：1) wear-resisting steel plate of rolled is subjected to Shot Blasting；2) steel plate after Shot Blasting is heated into continuous roller-hearth heat treatment furnace；3) Quenching Treatment is carried out using water under high pressure in spiral roller gap formula press quenching machine；Wherein, the quenching press high pressure section water is 2800~3000m3/ h, quenching press low pressure stage water is 2300~2500m3/h；4) steel plate after Quenching Treatment is subjected to temper.Take the present invention production method production wear-resisting steel plate uniformity of hardness it is good, plate shape is excellent, surface quality is good, steel plate unevenness reaches 0~3mm/m, obtains tempered martensite, and preparation method is simple and practical.
Description
Technical field
The present invention relates to technical field of wear-resistant steel, more particularly to a kind of heat treatment for improving abrasion-resistant stee case hardness uniformity
Method.
Background technology
It is well known that the material that the whole world has 1/1 to two/3rds every year can be consumed because of abrasion.And
In current high-abrasive material, abrasion-resistant stee it is most widely used, engineering machinery, mining machinery, coal mine machinery, disintegrating machine is often made
It is widely used in Deng machine components in each department such as metallurgy, mine, building materials, electric power, railway and military affairs, such as bull-dozer, dress
It is carrier aircraft, excavator, dumper and various mining machineries, grab bucket, stacker-reclaimer, conveying warp architecture, crusher jaw, broken
Wall, rolled mortar wall, tractor shoe, fan mill shock plate and railway switch etc..Many critical components can be sent out in use
Raw abrasion and be forced failure and scrap, it is most important that because the material for making these parts wears no resistance, cause after use
It can shortly cause to fail and need to change because of abrasion, thereby result in the waste on ample resources and the energy.
In abrasion-resistant stee application field, the good anti-wear performance being adapted with operating mode is always that scientific worker and machinery are made
Make the target of business's pursuit.With application development quickly, some iron companies of developed country have had for the exploitation of external abrasion-resistant stee
The series of products and standard of oneself, its production board is while high rigidity, high-wearing feature is ensured, steel plate uniformity of hardness and injustice
Degree is excellent.HARDOX series, the XAR series of Thyssen Krupp of such as Sweden's Losec Longde, can stablize supply HB330
~500 wear-resistant steel products that each rank case hardness uniformity is high, unevenness controlled level is high, and carried for most of use environments
Go out appropriate solution, and be successfully applied in high abrasion environment.
With the rapid development of the national economy, the technology development in China's abrasion-resistant stee field achieves rapid progress, the country is main
Steel mill's such as Heavy Plate Plant such as Wuhan Iron and Steel Plant, Anshan iron and steel plant, Baosteel, Nangang is wanted to stablize the serial wear-resisting steel plates of supply GB/T24186.But it is whole
For body, domestic steel mill has two on abrasion-resistant stee：(1) domestic quenching press uses roll gap formula press quenching machine mostly,
Because roller-way equipment is spiral point damping roller, the water for so resulting in surface of steel plate contact is uneven, causes surface to exist and quenches
Fiery watermark, uniformity of hardness is poor；(2) thin slab product unevenness is poor, cause that China is high-level, Thin Specs wearing plate almost
Whole imports.
A kind of publication No. CN102191363A, entitled thickness is special for the China of the production method of 2~15mm wear-resisting steel plates
Profit application, it uses roll gap formula press quenching machine to carry out Quenching Treatment, in order to ensure that Thin Specs plate shape will undoubtedly improve quenching press
Drafts, it is ensured that quenching process light plate is indeformable, thus occurs in that unavoidable point of damping roller projection correspondence in the industry
The problem of position contact small cooling velocity of water of steel plate is low, causes quenching to produce watermark and forms the uneven technology bottle of hardness
Neck.Meanwhile, the production method that the invention is confined to 2~15mm wear-resisting steel plates can not meet life for more than 16mm specification products
Production.
The content of the invention
It is an object of the present invention to for prior art above-mentioned, not enough there is provided one kind to improve abrasion-resistant stee case hardness equal
The heat treatment method of even property, meet 16~50mm wear-resisting steel plate surface without quenching watermark and whole steel plate hardness fluctuations in HBW3
Within performance uniformity coefficient it is high.The present invention makes abrasion-resistant stee of the hardness between HBW350~HBW530, and steel plate unevenness reaches 0
~3mm/m, obtains integrative organization's performance indications needs of tempered martensite.
To achieve the above object, the concrete technical scheme that the present invention is taken is as follows：
The heat treatment method of the raising abrasion-resistant stee case hardness uniformity of the present invention, comprises the following steps：
1) wear-resisting steel plate of rolled is subjected to Shot Blasting；
2) steel plate after Shot Blasting is heated into continuous roller-hearth heat treatment furnace；
3) Quenching Treatment is carried out using water under high pressure in spiral roller gap formula press quenching machine；Wherein, the quenching press high pressure
Duan Shuiliang is 2800~3000m3/ h, quenching press low pressure stage water is 2300~2500m3/h；
4) steel plate after Quenching Treatment is subjected to temper.
According to heat treatment method of the present invention, wherein, the step 4) in, if the steel-plate shape after Quenching Treatment
, it is necessary to be aligned with temperature when bad, carried out within the aligning need are online or offline 1 hour, straightening temperature is room temperature to Mf
In point (final temperature of martensite transfor mation).
According to heat treatment method of the present invention, wherein, it is the wear-resisting of 16~50mm present invention is preferably applicable to thickness
Steel plate.
According to heat treatment method of the present invention, the step 2) in, wherein preferably, heating-up temperature is Ac3+40 DEG C
~Ac3+60 DEG C, wherein, Ac3 is that phase transformation actual temperature when carbon steel is heated, i.e. heating-up temperature are to be further added by the basis of Ac3 values
40~60 DEG C；It is further preferred that the heating and thermal insulation time is 1.3~2.1min/mm+ (15~25) min, i.e., by 1.3~
2.1min/mm has been heated is incubated 15~25min again after steel plate.
According to heat treatment method of the present invention, the step 3) in, wherein preferably, quenching press roller table speed is 5
~12m/min, it is further preferred that roll gap formula press quenching machine drafts is 0~0.3mm.
According to heat treatment method of the present invention, wherein, the step 4) in, temperature is 150~380 DEG C, is returned
Fiery 15~25min of soaking time.
The difference of the present invention and prior art are mainly reflected in following several respects：
(1) heat treatment method of raising abrasion-resistant stee case hardness uniformity of the invention, breaks through prior art limitation, production
16~50mm wear-resisting steel plates surface without quenching watermark, and performance uniformity coefficient of the whole steel plate hardness fluctuations within HBW3
Height, abrasion-resistant stee of the hardness between HBW350~HBW530, this kind of surface no-watermark produced in rolled quenching machine and uniform
The high steel plate of property still belongs to blank at home.
(2) heat treatment method of raising abrasion-resistant stee case hardness uniformity of the invention, breaks existing roll-in clearance type and quenches
Lighter equipment Technology defect, creative utilization reduces quenching press drafts, reduction roller table speed, increases substantially simultaneously
High pressure section water is done directly quenching, it is to avoid it is higher so as to being formed due to a point damping roller projection that steel plate enters low pressure stage temperature
The position contact water of correspondence steel plate is small, causes quenching watermark and produces that hardness is uneven, this technology, which is solved, to quench in the industry
The uneven technical bottleneck problem of steel plate hardness.
(3) heat treatment method of raising abrasion-resistant stee case hardness uniformity of the invention, innovation and creative
Catch steel plate after quenching to be in elastic-plastic deformation stage window, quickly aligned, avoided after placement a period of time, steel plate base
Originally the technical barrier for being changed into overall plastic deformation and causing wear-resisting hardness of steel high rigidity height not align, is greatly improved plate shape
Qualification rate.
(4) take wear-resisting steel plate unevenness produced by the invention to reach 0~3mm/m, meet high unevenness standard requirement,
It is completely suitable for requiring high each application field.
(5) the high abrasion-resistant stee of case hardness uniformity of the present invention and its heat treatment method have significantly excellent
Gesture.The crucial thermal treatment process technology of science control, research and development high standard, mechanical property are good, the simple abrasion-resistant stee of technique is social warp
The inexorable trend of Ji and development of iron ＆ steel industry.
Embodiment
The present invention will be described in detail by specific embodiment below.
To realize that the present invention provides 16~50mm surface without quenching watermark and whole steel plate hardness fluctuations within HBW3
Performance uniformity coefficient it is high, abrasion-resistant stee of the hardness between HBW350~HBW530, steel plate unevenness reaches 0~3mm/m, obtains
The wear-resisting steel plate of tempered martensite.The present invention according to table 1 heat treatment process parameter to roll rear steel plate carry out quenching and
Temper.The main technologic parameters such as quenching temperature, the temperature of steel plate are shown in Table 1.Corresponding steel plate detection polishing thickness,
The performance such as Brinell hardness and its undulating value, steel plate unevenness is also listed in table 2.
The high abrasion-resistant stee main production parameter of the 1-5 case hardness uniformities of the embodiment of the present invention of table 1
The high wear-resisting Steel Properties of the 1-5 case hardness uniformities of the embodiment of the present invention of table 2 and unevenness index
It can be seen that what is produced according to Technology for Heating Processing of the present invention requirement by embodiment 1-5 and corresponding testing result
16~50mm of wear-resisting steel plate surface is without watermark and whole steel plate hardness fluctuations is quenched within HBW3, and performance uniformity coefficient is high,
Hardness is between HBW350~HBW530, and steel plate unevenness reaches 0~3mm/m, user is better met using expectation, using this
Product manufactured by the production technology of invention has filled up domestic blank, therefore, and wear-resisting steel plate of the invention has significantly excellent
Gesture.
The technological parameter (such as temperature, time, quenching press water, speed, drafts) of the present invention, in detail in the claims
Interval bound value claimed and interval value can realize this law, embodiment numerous to list herein.
Certainly, the present invention can also have various embodiments, in the case of without departing substantially from spirit of the invention and its essence, be familiar with
Those skilled in the art can make various corresponding changes and modification according to disclosure of the invention, but these it is corresponding change and
Deformation should all belong to the protection domain of appended claims of the invention.
Claims (8)
1. a kind of heat treatment method for improving abrasion-resistant stee case hardness uniformity, comprises the following steps：
1) wear-resisting steel plate of rolled is subjected to Shot Blasting；
2) steel plate after Shot Blasting is heated into continuous roller-hearth heat treatment furnace；
3) Quenching Treatment is carried out using water under high pressure in spiral roller gap formula press quenching machine；Wherein, the quenching press high pressure section water
Measure as 2800~3000m3/ h, quenching press low pressure stage water is 2300~2500m3/h；
4) steel plate after Quenching Treatment is subjected to temper.
2. heat treatment method as claimed in claim 1, it is characterised in that the step 4) in, the steel plate after Quenching Treatment
Band temperature is aligned when shape is bad, is carried out within the aligning is online or offline 1 hour, and straightening temperature is in room temperature to Mf points.
3. heat treatment method as claimed in claim 1, it is characterised in that the thickness of the wear-resisting steel plate is 16~50mm.
4. the heat treatment method as described in claim 1-3 is any, it is characterised in that the step 2) in, heating-up temperature is Ac3
+ 40 DEG C~Ac3+60 DEG C.
5. the heat treatment method as described in claim 1-4 is any, it is characterised in that the step 2) in, the heat time be by
1.3~2.1min/mm has been heated is incubated 15~25min again after steel plate.
6. the heat treatment method as described in claim 1-3 is any, it is characterised in that the step 3) in, quenching press roller-way speed
Spend for 5~12m/min.
7. the heat treatment method as described in claim 1-3 and 6 is any, it is characterised in that the step 3) in, roll gap formula pressure
Quenching press drafts is 0~0.3mm.
8. the heat treatment method as described in claim 1-3 is any, it is characterised in that the step 4) in, temperature is 150
~380 DEG C, 15~25min of tempering insulation time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710316755.6A CN107164612A (en) | 2017-05-08 | 2017-05-08 | A kind of heat treatment method for improving abrasion-resistant stee case hardness uniformity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710316755.6A CN107164612A (en) | 2017-05-08 | 2017-05-08 | A kind of heat treatment method for improving abrasion-resistant stee case hardness uniformity |
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| Publication Number | Publication Date |
|---|---|
| CN107164612A true CN107164612A (en) | 2017-09-15 |
Family
ID=59813159
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710316755.6A Pending CN107164612A (en) | 2017-05-08 | 2017-05-08 | A kind of heat treatment method for improving abrasion-resistant stee case hardness uniformity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109880983A (en) * | 2019-04-15 | 2019-06-14 | 贝斯山钢(山东)钢板有限公司 | One kind producing thin gauge hardened and tempered steel plate Quench heating method based on nitrogen protection roller hearth heat-treated furnace |
| CN111910060A (en) * | 2020-08-19 | 2020-11-10 | 山东钢铁股份有限公司 | Unconstrained quenching machine and unconstrained quenching process for thin and wide plates |
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| JP2002226912A (en) * | 2001-02-02 | 2002-08-14 | Nkk Corp | Heat treatment method of steel |
| CN101748333A (en) * | 2009-12-25 | 2010-06-23 | 舞阳钢铁有限责任公司 | Low-carbon-equivalent high-strength wear-resistant steel plate and production method thereof |
| CN102002645A (en) * | 2010-12-01 | 2011-04-06 | 莱芜钢铁股份有限公司 | High-strength wear-resistant steel plate and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109880983A (en) * | 2019-04-15 | 2019-06-14 | 贝斯山钢(山东)钢板有限公司 | One kind producing thin gauge hardened and tempered steel plate Quench heating method based on nitrogen protection roller hearth heat-treated furnace |
| CN111910060A (en) * | 2020-08-19 | 2020-11-10 | 山东钢铁股份有限公司 | Unconstrained quenching machine and unconstrained quenching process for thin and wide plates |
| CN111910060B (en) * | 2020-08-19 | 2024-02-23 | 山东钢铁股份有限公司 | Free-restraint quenching machine and free-restraint quenching process for thin and wide plates |
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Application publication date: 20170915 |
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