CN105483336A - Metal piece heat treatment technology - Google Patents
Metal piece heat treatment technology Download PDFInfo
- Publication number
- CN105483336A CN105483336A CN201510842120.0A CN201510842120A CN105483336A CN 105483336 A CN105483336 A CN 105483336A CN 201510842120 A CN201510842120 A CN 201510842120A CN 105483336 A CN105483336 A CN 105483336A
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- Prior art keywords
- metalwork
- temperature
- quenching
- normalizing
- metal
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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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- 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)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses a metal piece heat treatment technology. Before normalizing is carried out, the surface of a metal piece is coated with an environment-friendly glass protective lubricant and metal heat treatment protective paint, and a fused compact thin film can be generated on the surface of the metal piece when the metal piece is heated, so that the effects of oxidation prevention, decarbonization prevention and hydrogen diffusion prevention can be exerted; during the normalizing, a carbon-boron alloy is added to a vacuum heating machine, so that the surface hardness and the fatigue resistance of the metal piece can be improved; by adopting the temperature of a quenching furnace, the deformation of the metal piece can be reduced; the cooling is divided into two steps, so that the phenomenon that metal deforms as the interior or surface stress of metal changes due to nonuniform metal cooling can be avoided; through control on the tempering temperature and the tempering time, on the premise of ensuring the performance, the energy consumption is saved, and the production cost is lowered. With the adoption of an antirust technology, the metal piece heat treatment technology has the advantages of good antirust effect and good corrosion resistance, and has huge market potential broad prospects.
Description
Technical field
The invention belongs to Field of Heat-treatment, more particularly, the present invention relates to a kind of metalwork thermal treatment process.
Background technology
Metalwork thermal treatment is placed in certain medium by metal works to be heated to suitable temperature, and keep certain hour in this temperature after, cool in different media with friction-motion speed again, controlled a kind of technique of its performance by the microstructure changing metal material surface or inside.Metal heat treatmet is one of important process in machinofacture, compared with other complete processings, thermal treatment does not generally change the shape of workpiece and overall chemical composition, but by changing the microstructure of inside workpiece, or change the chemical composition of workpiece surface, give or improve the use properties of workpiece.Be characterized in the inner quality improving workpiece, and this not to be generally naked eyes can see.So it is the special process process in machinofacture, it is also the important step of quality control.Metal current part thermal treatment process also exists the large problem of metal strain.
Summary of the invention
Problem to be solved by this invention is to provide a kind of metalwork thermal treatment process.
To achieve these goals, the technical scheme that the present invention takes is:
A kind of metalwork thermal treatment process, comprises the steps:
(1) normalizing
Put into by metalwork in heating under vacuum machine and heat, the temperature of described heating under vacuum machine is 800-1000 DEG C, and the time of described normalizing is 20-40min;
(2) anneal
Then transferred in salt bath furnace by the metalwork after normalizing, until the temperature of metalwork is reduced to 700-800 DEG C, is then transferred in air furnace by metalwork and be incubated, the temperature of described air furnace is 650-710 DEG C, and the time of described insulation is 50-60min;
(3) quench
Be transferred in quenching furnance by metalwork after annealing and carry out quench hot, the time of quenching is 2-4h;
(4) be incubated
Be incubated in quenching furnance by metalwork after quenching, the time of described insulation is 60-80min;
(5) cool
Then the metalwork after insulation is carried out cooling process;
(6) tempering
Then the temperature of quenching furnance is raised, then metalwork is put into quenching furnance carry out temper;
(7) cool again
Then the temperature of quenching furnance reduced, metalwork carries out being cooled to 20-30 DEG C in quenching furnance.
Preferably, before carrying out normalizing, coating environment-friendly type glass protecting lubricant and Protective paint for heat treatment of metal are carried out to metalwork surface in described step (1).
Preferably, in heating under vacuum machine, carbon boron alloy is added during normalizing in described step (1).
Preferably, in described step (3), the temperature of quenching furnance is 800-900 DEG C.
Preferably, in described step (5), cooling is divided into two steps, and the first step is pre-cooled, the mode of blowing is used to cool metalwork, the time of described blowing is 10-20min, and second step is cooling, the metalwork after quenching is placed in quenching media and cools fast.
Preferably, the temperature 680-700 DEG C of tempering in described step (6), the time of tempering is 30-90min.
Beneficial effect: the invention provides a kind of metalwork thermal treatment process, describedly before carrying out normalizing, coating environment-friendly type glass protecting lubricant and Protective paint for heat treatment of metal process are carried out to metalwork surface, can with during heat metal articles in metalwork Surface Creation melting dense film, thus play anti-oxidation, the effect of anti-decarburization and antiseepage hydrogen, in heating under vacuum machine, carbon boron alloy is added during described normalizing, the hardness of surface of workpiece can be made, fatigue resistance is improved, the temperature of described quenching furnance can reduce the distortion of metalwork, described cooling is divided into two steps, can avoid causing the stress on metal inside or surface to change because metal cools is uneven thus the phenomenon that metal is deformed, the temperature of described tempering and the control of tempering time, can under the prerequisite of guaranteed performance, save energy consumption, reduce production cost.Adopt this kind of anti-corrosive technology, have the advantage of favorable rust preventing effect, good corrosion resistance, market potential is huge, has a extensive future.
Embodiment
embodiment 1:
A kind of metalwork thermal treatment process, comprises the steps:
(1) normalizing
First carry out coating environment-friendly type glass protecting lubricant and Protective paint for heat treatment of metal on metalwork surface, then put in heating under vacuum machine by metalwork and heat, the temperature of described heating under vacuum machine is 800 DEG C, and the time of described normalizing is 20min;
(2) anneal
Then transferred in salt bath furnace by the metalwork after normalizing, until the temperature of metalwork is reduced to 700 DEG C, is then transferred in air furnace by metalwork and be incubated, the temperature of described air furnace is 650 DEG C, and the time of described insulation is 50min;
(3) quench
Be transferred in quenching furnance by metalwork after annealing and carry out quench hot, the time of quenching is 2h, and the temperature of described quenching furnance is 800 DEG C;
(4) be incubated
Be incubated in quenching furnance by metalwork after quenching, the time of described insulation is 60min;
(5) cool
Then the metalwork after insulation is carried out cooling process, described cooling is divided into two steps, and the first step is pre-cooled, the mode of blowing is used to cool metalwork, the time of described blowing is 10min, and second step is cooling, the metalwork after quenching is placed in quenching media and cools fast;
(6) tempering
Then the temperature of quenching furnance raised, then metalwork is put into quenching furnance carry out temper, the temperature of described tempering 680 DEG C, the time of tempering is 30min;
(7) cool again
Then the temperature of quenching furnance reduced, metalwork carries out being cooled to 20 DEG C in quenching furnance.
embodiment 2:
A kind of metalwork thermal treatment process, comprises the steps:
(1) normalizing
First carry out coating environment-friendly type glass protecting lubricant and Protective paint for heat treatment of metal on metalwork surface, then put in heating under vacuum machine by metalwork and heat, the temperature of described heating under vacuum machine is 900 DEG C, and the time of described normalizing is 30min;
(2) anneal
Then transferred in salt bath furnace by the metalwork after normalizing, until the temperature of metalwork is reduced to 750 DEG C, is then transferred in air furnace by metalwork and be incubated, the temperature of described air furnace is 680 DEG C, and the time of described insulation is 55min;
(3) quench
Be transferred in quenching furnance by metalwork after annealing and carry out quench hot, the time of quenching is 3h, and the temperature of described quenching furnance is 850 DEG C;
(4) be incubated
Be incubated in quenching furnance by metalwork after quenching, the time of described insulation is 70min;
(5) cool
Then the metalwork after insulation is carried out cooling process, described cooling is divided into two steps, and the first step is pre-cooled, the mode of blowing is used to cool metalwork, the time of described blowing is 15min, and second step is cooling, the metalwork after quenching is placed in quenching media and cools fast;
(6) tempering
Then the temperature of quenching furnance raised, then metalwork is put into quenching furnance carry out temper, the temperature of described tempering 690 DEG C, the time of tempering is 60min;
(7) cool again
Then the temperature of quenching furnance reduced, metalwork carries out being cooled to 25 DEG C in quenching furnance.
embodiment 3:
A kind of metalwork thermal treatment process, comprises the steps:
(1) normalizing
First carry out coating environment-friendly type glass protecting lubricant and Protective paint for heat treatment of metal on metalwork surface, then put in heating under vacuum machine by metalwork and heat, the temperature of described heating under vacuum machine is 1000 DEG C, and the time of described normalizing is 40min;
(2) anneal
Then transferred in salt bath furnace by the metalwork after normalizing, until the temperature of metalwork is reduced to 800 DEG C, is then transferred in air furnace by metalwork and be incubated, the temperature of described air furnace is 710 DEG C, and the time of described insulation is 60min;
(3) quench
Be transferred in quenching furnance by metalwork after annealing and carry out quench hot, the time of quenching is 4h, and the temperature of described quenching furnance is 900 DEG C;
(4) be incubated
Be incubated in quenching furnance by metalwork after quenching, the time of described insulation is 80min;
(5) cool
Then the metalwork after insulation is carried out cooling process, described cooling is divided into two steps, and the first step is pre-cooled, the mode of blowing is used to cool metalwork, the time of described blowing is 20min, and second step is cooling, the metalwork after quenching is placed in quenching media and cools fast;
(6) tempering
Then the temperature of quenching furnance raised, then metalwork is put into quenching furnance carry out temper, the temperature of described tempering 700 DEG C, the time of tempering is 90min;
(7) cool again
Then the temperature of quenching furnance reduced, metalwork carries out being cooled to 30 DEG C in quenching furnance.
After above technique, take out sample respectively, measuring result is as follows:
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 | Prior art index |
| Relative reduction in area (%) | 47 | 49 | 46 | 35 |
| Yield strength (MPa) | 690 | 697 | 686 | 472 |
| Tensile strength (MPa) | 710 | 720 | 715 | 696 |
Can draw according to above table data, metalwork when embodiment 2 parameter after thermal treatment than the yield strength of the metalwork after prior art thermal treatment and tensile strength high, and relative reduction in area is than height out after prior art thermal treatment, is now more conducive to the thermal treatment of metalwork.
The invention provides a kind of metalwork thermal treatment process, describedly before carrying out normalizing, coating environment-friendly type glass protecting lubricant and Protective paint for heat treatment of metal process are carried out to metalwork surface, can with during heat metal articles in metalwork Surface Creation melting dense film, thus play anti-oxidation, the effect of anti-decarburization and antiseepage hydrogen, in heating under vacuum machine, carbon boron alloy is added during described normalizing, the hardness of surface of workpiece can be made, fatigue resistance is improved, the temperature of described quenching furnance can reduce the distortion of metalwork, described cooling is divided into two steps, can avoid causing the stress on metal inside or surface to change because metal cools is uneven thus the phenomenon that metal is deformed, the temperature of described tempering and the control of tempering time, can under the prerequisite of guaranteed performance, save energy consumption, reduce production cost.Adopt this kind of anti-corrosive technology, have the advantage of favorable rust preventing effect, good corrosion resistance, market potential is huge, has a extensive future.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. a metalwork thermal treatment process, is characterized in that, comprises the steps:
(1) normalizing
Put into by metalwork in heating under vacuum machine and heat, the temperature of described heating under vacuum machine is 800-1000 DEG C, and the time of described normalizing is 20-40min;
(2) anneal
Then transferred in salt bath furnace by the metalwork after normalizing, until the temperature of metalwork is reduced to 700-800 DEG C, is then transferred in air furnace by metalwork and be incubated, the temperature of described air furnace is 650-710 DEG C, and the time of described insulation is 50-60min;
(3) quench
Be transferred in quenching furnance by metalwork after annealing and carry out quench hot, the time of quenching is 2-4h;
(4) be incubated
Be incubated in quenching furnance by metalwork after quenching, the time of described insulation is 60-80min;
(5) cool
Then the metalwork after insulation is carried out cooling process;
(6) tempering
Then the temperature of quenching furnance is raised, then metalwork is put into quenching furnance carry out temper;
(7) cool again
Then the temperature of quenching furnance reduced, metalwork carries out being cooled to 20-30 DEG C in quenching furnance.
2. according to a kind of metalwork thermal treatment process according to claim 1, it is characterized in that: described step carries out coating environment-friendly type glass protecting lubricant and Protective paint for heat treatment of metal to metalwork surface in (1) before carrying out normalizing.
3. according to a kind of metalwork thermal treatment process according to claim 1, it is characterized in that: in described step (1), during normalizing, in heating under vacuum machine, add carbon boron alloy.
4. according to a kind of metalwork thermal treatment process according to claim 1, it is characterized in that: described in described step (3), the temperature of quenching furnance is 800-900 DEG C.
5. according to a kind of metalwork thermal treatment process according to claim 1, it is characterized in that: in described step (5), cooling is divided into two steps, the first step is pre-cooled, the mode of blowing is used to cool metalwork, the time of described blowing is 10-20min, second step is cooling, the metalwork after quenching is placed in quenching media and cools fast.
6. according to a kind of metalwork thermal treatment process according to claim 1, it is characterized in that: the temperature 680-700 DEG C of tempering in described step (6), the time of tempering is 30-90min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510842120.0A CN105483336A (en) | 2015-11-29 | 2015-11-29 | Metal piece heat treatment technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510842120.0A CN105483336A (en) | 2015-11-29 | 2015-11-29 | Metal piece heat treatment technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105483336A true CN105483336A (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510842120.0A Pending CN105483336A (en) | 2015-11-29 | 2015-11-29 | Metal piece heat treatment technology |
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| Country | Link |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011394A (en) * | 2016-06-03 | 2016-10-12 | 太仓市沪太热处理厂 | Heat treatment process adopting three-section type heating for metal workpiece |
| CN106956107A (en) * | 2017-05-08 | 2017-07-18 | 宁波金凤焊割机械制造有限公司 | The machining process of metalwork |
| CN107267718A (en) * | 2017-07-04 | 2017-10-20 | 合肥市大卓电力有限责任公司 | A kind of stainless steel work-piece Technology for Heating Processing |
| CN110592328A (en) * | 2019-10-22 | 2019-12-20 | 徐州彭圆锻造有限公司 | Surface heat treatment process for metal piece |
| CN112247499A (en) * | 2020-09-07 | 2021-01-22 | 湖北坚丰科技股份有限公司 | Finish machining process for spline shaft of automobile transmission shaft |
| CN116100811A (en) * | 2023-04-14 | 2023-05-12 | 易加三维增材技术(杭州)有限公司 | Printing part forming method and device, electronic equipment and nonvolatile storage medium |
Citations (3)
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| JP2003064415A (en) * | 2001-08-23 | 2003-03-05 | Daido Steel Co Ltd | Method for adjusting atmosphere and temperature of heat treatment furnace |
| CN102392124A (en) * | 2011-10-26 | 2012-03-28 | 西南交通大学 | Heat treatment technology method for improving obdurability of high-speed steel |
| CN105088132A (en) * | 2015-09-25 | 2015-11-25 | 辽宁工业大学 | Surface treatment method for solid carbon-boron complex penetration of low-carbon alloy steel part |
-
2015
- 2015-11-29 CN CN201510842120.0A patent/CN105483336A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003064415A (en) * | 2001-08-23 | 2003-03-05 | Daido Steel Co Ltd | Method for adjusting atmosphere and temperature of heat treatment furnace |
| CN102392124A (en) * | 2011-10-26 | 2012-03-28 | 西南交通大学 | Heat treatment technology method for improving obdurability of high-speed steel |
| CN105088132A (en) * | 2015-09-25 | 2015-11-25 | 辽宁工业大学 | Surface treatment method for solid carbon-boron complex penetration of low-carbon alloy steel part |
Non-Patent Citations (2)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011394A (en) * | 2016-06-03 | 2016-10-12 | 太仓市沪太热处理厂 | Heat treatment process adopting three-section type heating for metal workpiece |
| CN106956107A (en) * | 2017-05-08 | 2017-07-18 | 宁波金凤焊割机械制造有限公司 | The machining process of metalwork |
| CN107267718A (en) * | 2017-07-04 | 2017-10-20 | 合肥市大卓电力有限责任公司 | A kind of stainless steel work-piece Technology for Heating Processing |
| CN110592328A (en) * | 2019-10-22 | 2019-12-20 | 徐州彭圆锻造有限公司 | Surface heat treatment process for metal piece |
| CN112247499A (en) * | 2020-09-07 | 2021-01-22 | 湖北坚丰科技股份有限公司 | Finish machining process for spline shaft of automobile transmission shaft |
| CN116100811A (en) * | 2023-04-14 | 2023-05-12 | 易加三维增材技术(杭州)有限公司 | Printing part forming method and device, electronic equipment and nonvolatile storage medium |
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Application publication date: 20160413 |