CN106498131A - A kind of heat treatment method of high intensity ZG40Mn2 material - Google Patents
A kind of heat treatment method of high intensity ZG40Mn2 material Download PDFInfo
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- CN106498131A CN106498131A CN201611045022.5A CN201611045022A CN106498131A CN 106498131 A CN106498131 A CN 106498131A CN 201611045022 A CN201611045022 A CN 201611045022A CN 106498131 A CN106498131 A CN 106498131A
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- Prior art keywords
- zg40mn2
- materials
- high intensity
- heat treatment
- incubated
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- 239000000463 material Substances 0.000 title claims abstract description 75
- 238000010438 heat treatment Methods 0.000 title claims abstract description 17
- 238000010791 quenching Methods 0.000 claims abstract description 26
- 230000000171 quenching Effects 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 238000005496 tempering Methods 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 229910001566 austenite Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000011068 load Methods 0.000 description 3
- 239000003607 modifier Substances 0.000 description 3
- 206010011376 Crepitations Diseases 0.000 description 2
- 229910001567 cementite Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 210000001519 tissues Anatomy 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 230000000240 adjuvant Effects 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
Abstract
This application discloses a kind of heat treatment method of the high intensity ZG40Mn2 material in Field of Heat-treatment, including following step：Step one：ZG40Mn2 materials is put into and be preheated in shaft furnace 670 ~ 710 DEG C, and be incubated 50 ~ 70min；Step 2：800 ~ 840 DEG C are again heated on the basis of step one, are incubated 70 ~ 90min, are obtained primary ZG40Mn2 materials；Step 3：Subsequently primary ZG40Mn2 materials are put to 7%～9% quenching liquid that oil temperature is 30～70 DEG C and is quenched, obtain intermediate ZG40Mn2 materials；Step 4：Intermediate ZG40Mn2 materials are taken out from quenching liquid, place and cooled down in atmosphere, it is re-fed in bench vehicle type electrical resistance furnace, being heated to 530 ~ 590 DEG C after being cooled to room temperature, being air cooled to room temperature after 110 ~ 130min of insulation carries out high tempering, obtains high intensity ZG40Mn2 material.
Description
Technical field
The present invention relates to Field of Heat-treatment, and in particular to a kind of heat treatment method of high intensity ZG40Mn2 material.
Background technology
The special ZG40Mn2 materials of high intensity are mainly used in certain model special type heavy-duty car deflecting roller group parts thereof etc.
Aerospace field, its mechanical property is：Tensile strength sigma b >=885MPa, yield strength σ S >=735MPa, under arms during
It is often required to bear larger shock loading.Long-time is in this working environment, if only pursue improving intensity and toughness plasticity not
Foot, in the case of material yield strength often in loading stress far below steel, because there is brittle fracture in instable growth of crack.
ZG40Mn2 is the one kind in cast steel, and ZG40Mn2 materials belong to high strength steel, and feature is：There is high intensity, and good
Quenching degree well, toughness and welding performance, have higher fatigue limit and anti-repeat impact ability after modifier treatment.The material is fitted
Intensity and toughness reguirements higher heavy-duty machinery etc. is preferably manufactured.It requires that such material there must be enough toughness plasticities,
Guarantee safe and reliable, thus increase heat treatment each parameter request.Due to the particularity of the ZG40Mn2 materials, if warm
Degree control is bad so that tissue can change with the drastically change of temperature too fast and so that interior tissue austenite crystal is thick leads
Cause hardness height, the poor toughness of workpiece；And the martensitic structure obtained during because quickly cooling down in quenching liquid, and martensite
Organize usual fragility larger, for the ZG40Mn2 material sub-eutectoid steel, if hardening heat underheat and failing formed completely difficult to understand
Family name's body, causes the hardness deficiency of steel, if heating-up temperature is too high, because of Austenite Grain Growth, the martensitic structure after quenching is also thick
Greatly, the fragility that increased steel causes steel part crackle and the tendency of deformation to increase, or even cracking.
Due to knuckle in heavy-duty car deflecting roller group parts, it is coupled the shape and structure of section is complicated and wall unevenness is even etc.
Feature, and the type component is for a long time under the operating mode of high-speed overload, high to mechanical property requirements, not only need intensity, hardness high,
And good plasticity and toughness is needed, this adds increased the difficulty of casting so that the qualification rate of such foundry goods is low.And due to
The particularity of ZG40Mn2 materials, the particularity of its material show that manganese content is 1.6%～1.8%, and manganese content is significantly improved to be quenched
Permeability, refines pearlitic structrure, improves hardness and wearability, reduces the plastic brittle transition temperature of steel, inductile not dropping
Under the conditions of improve intensity.Again as the quenching degree of the material is good, hardening crack and the change of product is easily caused in heat treatment process
Shape.Such foundry goods all after modifier treatment in the state of use, and belong to the quenched manganese steel of middle carbon, the intensity of steel-casting, plasticity
Good with all higher machinability of wearability and heat treatment processing properties, the diameter of up to 20～42mm of critical through hardening in oil, but
Temper brittleness, and superheated susceptivity is there is, and steel-casting cracking is easily caused in quenching.
Content of the invention
The invention is intended to provide a kind of heat treatment method of high intensity ZG40Mn2 material, with obtain intensity and toughness all compared with
Good ZG40Mn2 materials.
A kind of heat treatment method of the high intensity ZG40Mn2 material in this programme, including following step：
Step one：ZG40Mn2 materials is put into and be preheated in shaft furnace 670 ~ 710 DEG C, and be incubated 50 ~ 70min；
Step 2：800 ~ 840 DEG C are again heated on the basis of step one, are incubated 70 ~ 90min, are obtained primary ZG40Mn2 materials
Material；
Step 3：Subsequently primary ZG40Mn2 materials are put to 7%～9% quenching liquid that oil temperature is 30～70 DEG C and is quenched, obtain
Intermediate ZG40Mn2 materials；
Step 4：Intermediate ZG40Mn2 materials are taken out from quenching liquid, after being cooled to room temperature, bench vehicle type electrical resistance furnace is re-fed into
In be heated to 530 ~ 590 DEG C, be air cooled to room temperature and carry out high tempering after 110 ~ 130min of insulation, obtain high intensity ZG40Mn2 material
Material.
The beneficial effect of this programme：The invention has the beneficial effects as follows：Added using 670 ~ 710 DEG C of 50 ~ 70min of insulation are preheated to
Heat is incubated 70 ~ 90min to 800 ~ 840 DEG C, and after preheating insulation, the process of heating and heat preservation can make ZG40Mn2 materials microstructures again
Slowly change and complete austenitizing, and 800 ~ 840 DEG C of critical temperatures for sub-eutectoid steel complete austenitizing, can achieve completely
Austenitizing, and the crystal grain of austenite structure will not be made to grow up, the austenite crystal of gained is tiny, quickly cools down in quenching liquid
During the martensitic structure that obtained also tiny, so as to improve the intensity and hardness of ZG40Mn2 materials, and can improve
The toughness of ZG40Mn2 materials, reduces the tendency of ZG40Mn2 material cracks and deformation.
The selection of another 7%～9% quenching liquid is also one of key, and 7%～9% quenching liquid can make ZG40Mn2 materials ratio in water
Rate of cooling low, quench ZG40Mn2 materials crackle, deformation tendency little, prevent steel part ftracture；The present invention selects to be heated to
530 ~ 590 DEG C, the high tempering of room temperature is air cooled to after being incubated 110 ~ 130min so that in the ZG40Mn2 material structures after quenching
Cementite is separated out, and the cementite is in acinous, stress concentration is not likely to produce under load effect, so that ZG40Mn2 materials
Toughness significantly improve；Therefore the ZG40Mn2 materials through modifier treatment of the present invention can obtain intensity and toughness is all preferably comprehensive
Mechanical property.
Further, cooled down using natural wind in the step 4.As ZG40Mn2 material surfaces are stained with quenching
Liquid, due to carrying combustion adjuvant oxygen in natural wind, after oxygen and the quenching fluid contacts of high temperature so that quenching liquid burns,
Cause the quenching liquid loss of ZG40Mn2 material surfaces adhesion, it is ensured that ZG40Mn2 material surfaces do not have impurities left.
Specific embodiment
Below by specific embodiment, the present invention is further detailed explanation：
Embodiment 1：
A kind of heat treatment method of high intensity ZG40Mn2 material, including following step：
Step one：670 DEG C are preheated in the 75KW shaft furnaces that ZG40Mn2 materials are put into DRZ-100C models, and are incubated
50min；
Step 2：Continue 800 DEG C to be again heated in the 75KW shaft furnaces of DRZ-100C models on the basis of step one, be incubated
70min, obtains primary ZG40Mn2 materials；
Step 3：Subsequently primary ZG40Mn2 materials are put to the quenching liquid of 7% that oil temperature is 30 DEG C and quenched, obtain middle rank
ZG40Mn2 materials；
Step 4：Intermediate ZG40Mn2 materials are taken out from quenching liquid, is placed and is cooled down in atmosphere, be cooled to room temperature
530 DEG C are heated in the bench vehicle type electrical resistance furnace for being re-fed into RT3-260-18 models afterwards, be air cooled to room temperature and enter after insulation 110min
Row high tempering, obtains high intensity ZG40Mn2 material.
Embodiment 2：
A kind of heat treatment method of high intensity ZG40Mn2 material, including following step：
Step one：690 DEG C are preheated in the 75KW shaft furnaces that ZG40Mn2 materials are put into DRZ-100C models, and are incubated
60min；
Step 2：Continue 820 DEG C to be again heated in the 75KW shaft furnaces of DRZ-100C models on the basis of step one, be incubated
80min, obtains primary ZG40Mn2 materials；
Step 3：Subsequently primary ZG40Mn2 materials are put to the quenching liquid of 8% that oil temperature is 50 DEG C and quenched, obtain middle rank
ZG40Mn2 materials；
Step 4：Intermediate ZG40Mn2 materials are taken out from quenching liquid, is placed and is cooled down in atmosphere, be cooled to room temperature
570 DEG C are heated in the bench vehicle type electrical resistance furnace for being re-fed into RT3-260-18 models afterwards, be air cooled to room temperature and enter after insulation 120min
Row high tempering, obtains high intensity ZG40Mn2 material.
Embodiment 3：
A kind of heat treatment method of high intensity ZG40Mn2 material, including following step：
Step one：710 DEG C are preheated in the 75KW shaft furnaces that ZG40Mn2 materials are put into DRZ-100C models, and are incubated
70min；
Step 2：Continue 840 DEG C to be again heated in the 75KW shaft furnaces of DRZ-100C models on the basis of step one, be incubated
90min, obtains primary ZG40Mn2 materials；
Step 3：Subsequently primary ZG40Mn2 materials are put to the quenching liquid of 9% that oil temperature is 70 DEG C and quenched, obtain middle rank
ZG40Mn2 materials；
Step 4：Intermediate ZG40Mn2 materials are taken out from quenching liquid, is placed and is cooled down in atmosphere, be cooled to room temperature
590 DEG C are heated in the bench vehicle type electrical resistance furnace for being re-fed into RT3-260-18 models afterwards, be air cooled to room temperature and enter after insulation 130min
Row high tempering, obtains high intensity ZG40Mn2 material.
After being tested using this programme, after industry standard and traditional handicraft contrast, the related data of table 1 is drawn：
After the data in table 1 are can be seen that using this programme, the various performances of ZG40Mn2 materials are above national standard
While, also above the standard of traditional handicraft.
Above-described is only embodiments of the invention, and in scheme, the known general knowledge here such as concrete structure and characteristic is not made
Excessive description.It should be pointed out that for a person skilled in the art, on the premise of without departing from present configuration, can be with
Some deformations and improvement is made, these should also be considered as protection scope of the present invention, these are implemented all without the impact present invention
Effect and practical applicability.This application claims protection domain should be defined by the content of its claim, in description
Specific embodiment etc. records the content that can be used for explaining claim.
Claims (2)
1. a kind of heat treatment method of high intensity ZG40Mn2 material, it is characterised in that：Including following step：
Step one：ZG40Mn2 materials is put into and be preheated in shaft furnace 670 ~ 710 DEG C, and be incubated 50 ~ 70min；
Step 2：800 ~ 840 DEG C are again heated on the basis of step one, are incubated 70 ~ 90min, are obtained primary ZG40Mn2 materials
Material；
Step 3：Subsequently primary ZG40Mn2 materials are put to 7%～9% quenching liquid that oil temperature is 30～70 DEG C and is quenched, obtain
Intermediate ZG40Mn2 materials；
Step 4：Intermediate ZG40Mn2 materials are taken out from quenching liquid, after being cooled to room temperature, bench vehicle type electrical resistance furnace is re-fed into
In be heated to 530 ~ 590 DEG C, be air cooled to room temperature and carry out high tempering after 110 ~ 130min of insulation, obtain high intensity ZG40Mn2 material
Material.
2. the heat treatment method of high intensity ZG40Mn2 material according to claim 1, it is characterised in that：The step 4
Middle cooled down using natural wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611045022.5A CN106498131A (en) | 2016-11-24 | 2016-11-24 | A kind of heat treatment method of high intensity ZG40Mn2 material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611045022.5A CN106498131A (en) | 2016-11-24 | 2016-11-24 | A kind of heat treatment method of high intensity ZG40Mn2 material |
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| Publication Number | Publication Date |
|---|---|
| CN106498131A true CN106498131A (en) | 2017-03-15 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611045022.5A Pending CN106498131A (en) | 2016-11-24 | 2016-11-24 | A kind of heat treatment method of high intensity ZG40Mn2 material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052244A (en) * | 2017-04-10 | 2017-08-18 | 遵义金业机械铸造有限公司 | A kind of lost-foam casting method of ZG40Mn2 materials |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58141328A (en) * | 1982-02-13 | 1983-08-22 | Nisshin Steel Co Ltd | Manufacture of high strength high toughness steel |
| CN1057679A (en) * | 1990-06-16 | 1992-01-08 | 鞍山钢铁公司 | Steel for sucker rod and processing method |
| CN1072727A (en) * | 1991-11-25 | 1993-06-02 | 王晶华 | The heat treating method of medium carbon manganese steel and low carbon manganese steel finished product |
| CN105154764A (en) * | 2015-09-18 | 2015-12-16 | 鞍钢集团矿业公司 | Light-weight high manganese steel lining plate for crusher and preparation method of light-weight high manganese steel lining plate |
-
2016
- 2016-11-24 CN CN201611045022.5A patent/CN106498131A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58141328A (en) * | 1982-02-13 | 1983-08-22 | Nisshin Steel Co Ltd | Manufacture of high strength high toughness steel |
| CN1057679A (en) * | 1990-06-16 | 1992-01-08 | 鞍山钢铁公司 | Steel for sucker rod and processing method |
| CN1072727A (en) * | 1991-11-25 | 1993-06-02 | 王晶华 | The heat treating method of medium carbon manganese steel and low carbon manganese steel finished product |
| CN105154764A (en) * | 2015-09-18 | 2015-12-16 | 鞍钢集团矿业公司 | Light-weight high manganese steel lining plate for crusher and preparation method of light-weight high manganese steel lining plate |
Non-Patent Citations (2)
| Title |
|---|
| 吴玉逢等: "ZG40Mn2铸钢的热处理工艺研究", 《热加工工艺》 * |
| 支道光主编: "《实用热处理工艺守则》", 31 May 2013 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052244A (en) * | 2017-04-10 | 2017-08-18 | 遵义金业机械铸造有限公司 | A kind of lost-foam casting method of ZG40Mn2 materials |
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Application publication date: 20170315 |