CN105695671A - Magnetic steel heat treatment technology - Google Patents
Magnetic steel heat treatment technology Download PDFInfo
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- CN105695671A CN105695671A CN201410699408.2A CN201410699408A CN105695671A CN 105695671 A CN105695671 A CN 105695671A CN 201410699408 A CN201410699408 A CN 201410699408A CN 105695671 A CN105695671 A CN 105695671A
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Abstract
The invention discloses a magnetic steel heat treatment technology. The magnetic steel heat treatment technology comprises 1, casting blank annealing: putting a casting blank into a high temperature furnace at power of 26KW, carrying out furnace heating to a temperature of 11000 DEG C, carrying out thermal insulation for 1-2h and carrying out furnace cooling, and 2, product heat treatment: a, middle temperature preheating, b, high temperature solid solution, c, magnetic field air quenching or magnetic field air cooling, d, low temperature preheating: carrying out demagnetization on a product subjected to solid solution and air quenching, putting the product into a stainless steel small box, feeding the stainless steel small box with the product into a box-type resistance furnace, carrying out preheating at a temperature of 600-6500 DEG C and carrying out thermal insulation for greater than or equal to 20-30min, e, magnetic field isothermal treatment, f, multistage ageing and tempering and g, cooling to a temperature of about 2000 DEG C or less after tempering and then discharge. The magnetic steel heat treatment technology has simple processes, is free of repeated processes and improves work efficiency.
Description
Technical field
The present invention relates to the Technology for Heating Processing of a kind of magnet steel。
Background technology
The Technology for Heating Processing of magnet steel includes spray annealing, and the heat treatment of preliminary grinding product, wherein product heat treatment is preheated by middle temperature, high temperature solid solution, magnetic-field cooling, low-temperature prewarming, magnetic field isothermal, six stages of multistage inefficacy。
The Technology for Heating Processing of current magnet steel is more complicated, also without unified specification, it does not have unified standard, the Technology for Heating Processing causing magnet steel is uneven, a lot of operations that repeat also make under production efficiency, increase the work burden of workman, make the competitiveness of product in market not high simultaneously。For some operators just entered a profession, it does not have a clear and definite method technique, cause, when operation, mistakes and omissions often occur, in some instances it may even be possible to cause serious consequence。
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide the Technology for Heating Processing of a kind of magnet steel, and this Technology for Heating Processing is simple, eliminates a lot of repeatability operation, improves work efficiency。
For achieving the above object, the invention provides the Technology for Heating Processing of a kind of magnet steel, it is characterised in that comprise the steps: 1) strand annealing, load in 26KW high temperature furnace by bad for casting, open temperature to 11000 DEG C with stove, be incubated 12 hours, stove is cold；
2) product heat treatment: a) middle temperature preheating: will roughly grind the product proper alignment of processing, in loading stainless steel box in high temperature box furnace, is heated to 850 9000 DEG C and is incubated more than 30 minutes；
B) high temperature solid solution: stainless steel shovel is delivered in about 12400 DEG C high temperature furnaces by long for the product of pre-heat penetration, it is incubated 10 20 minutes, for ensureing that product alloy forms single solid solution and prevents product from aoxidizing, cross and crumple except paying special attention to grasp temperature and temperature retention time, also should control the loading quantity of product and in stove, load coke manufacture reducing atmosphere；
C) magnetic field wind quenching or magnetic field air cooling: hook to pull out rapidly with rustless steel by product good for solid solution from high temperature furnace and put into air-cooled in magnetic field or air cooling, according to weather condition, being generally and blow abrupt wind cooling extremely hot season in summer, all the other times can breeze or natural cooling, magnetic intensity 240KA/m in atmosphere；
D) low temperature gives heat: loads in rustless steel capsule after being demagnetized by the product after solid solution wind quenching, sends in box-shaped resistance furnace and give heat, give 600 6500 DEG C of temperature retention times of hot temperature and be not less than 20 30 minutes；
E) magnetic field isothermal: low temperature is given the good product of heat and sends into rapidly together in constant-temperature oven in company with the stainless steel box contained, rectifier current output is adjusted to 50 60A, now magnetic field intensity is about 240KA/m, start to calculate isothermal time when temperature reaches 8000 DEG C, temperature retention time is about 15 20 minutes, when temperature retention time enough after, turn off magnetic field immediately, take out product slow cooling, when product size is bigger, this technique can be adopted when shape is more complicated, product saturating for solid solution is taken out rapidly from stove, being placed on cartridge air cooling constantly stirs product, to ensure the cooling of product surrounding uniformly, when product is cooled to 900 9500 DEG C, in time product is sandwiched magnetic field, it is covered with insulation fibre, make product Slow cooling in magnetic field, after 18 minutes, open insulation fibre, product should be kermesinus, cooling rate general control is at 15 200 DEG C/minute as well；
F) multistage aging tempering: the product after magnetic field is processed, load in 12KW chamber type annealing stove, burner hearth bottom corrosion resistant plate, plate pad puts grid-type brandreth, product installs with certain interval by group, good in order to conduction of heat, uniformly, each charge weight controls about 20 30Kg, and stove gate refractory fibre seals shelves；
G), after tempering terminates, stove is cooled to about less than 2000 DEG C and comes out of the stove。
The invention has the beneficial effects as follows: this Technology for Heating Processing is simple, eliminate a lot of repeatability operation, improve work efficiency。
Detailed description of the invention
The technical scheme is that the Technology for Heating Processing of a kind of magnet steel, it is characterised in that comprise the steps:
1) strand annealing, loads in 26KW high temperature furnace by bad for casting, opens temperature to 11000 DEG C with stove, be incubated 12 hours, and stove is cold；
2) product heat treatment: a) middle temperature preheating: will roughly grind the product proper alignment of processing, in loading stainless steel box in high temperature box furnace, is heated to 850 9000 DEG C and is incubated more than 30 minutes；
B) high temperature solid solution: stainless steel shovel is delivered in about 12400 DEG C high temperature furnaces by long for the product of pre-heat penetration, it is incubated 10 20 minutes, for ensureing that product alloy forms single solid solution and prevents product from aoxidizing, cross and crumple except paying special attention to grasp temperature and temperature retention time, also should control the loading quantity of product and in stove, load coke manufacture reducing atmosphere；
C) magnetic field wind quenching or magnetic field air cooling: hook to pull out rapidly with rustless steel by product good for solid solution from high temperature furnace and put into air-cooled in magnetic field or air cooling, according to weather condition, being generally and blow abrupt wind cooling extremely hot season in summer, all the other times can breeze or natural cooling, magnetic intensity 240KA/m in atmosphere；
D) low temperature gives heat: loads in rustless steel capsule after being demagnetized by the product after solid solution wind quenching, sends in box-shaped resistance furnace and give heat, give 600 6500 DEG C of temperature retention times of hot temperature and be not less than 20 30 minutes；
E) magnetic field isothermal: low temperature is given the good product of heat and sends into rapidly together in constant-temperature oven in company with the stainless steel box contained, rectifier current output is adjusted to 50 60A, now magnetic field intensity is about 240KA/m, start to calculate isothermal time when temperature reaches 8000 DEG C, temperature retention time is about 15 20 minutes, when temperature retention time enough after, turn off magnetic field immediately, take out product slow cooling, when product size is bigger, this technique can be adopted when shape is more complicated, product saturating for solid solution is taken out rapidly from stove, being placed on cartridge air cooling constantly stirs product, to ensure the cooling of product surrounding uniformly, when product is cooled to 900 9500 DEG C, in time product is sandwiched magnetic field, it is covered with insulation fibre, make product Slow cooling in magnetic field, after 18 minutes, open insulation fibre, product should be kermesinus, cooling rate general control is at 15 200 DEG C/minute as well；
F) multistage aging tempering: the product after magnetic field is processed, load in 12KW chamber type annealing stove, burner hearth bottom corrosion resistant plate, plate pad puts grid-type brandreth, product installs with certain interval by group, good in order to conduction of heat, uniformly, each charge weight controls about 20 30Kg, and stove gate refractory fibre seals shelves；
G), after tempering terminates, stove is cooled to about less than 2000 DEG C and comes out of the stove。
This Technology for Heating Processing is simple, eliminates a lot of repeatability operation, improves work efficiency。
The preferred embodiment of the present invention described in detail above。Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work。Therefore, all technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment。
Claims (1)
1. the Technology for Heating Processing of a magnet steel, it is characterised in that comprise the steps: 1) strand annealing, load in 26KW high temperature furnace by bad for casting, open temperature to 1100 DEG C with stove, be incubated 12 hours, stove is cold；
2) product heat treatment: a) middle temperature preheating: will roughly grind the product proper alignment of processing, in loading stainless steel box in high temperature box furnace, is heated to 850 900 DEG C and is incubated more than 30 minutes；
B) high temperature solid solution: stainless steel shovel is delivered in about 1240 DEG C high temperature furnaces by long for the product of pre-heat penetration, it is incubated 10 20 minutes, for ensureing that product alloy forms single solid solution and prevents product from aoxidizing, cross and crumple except paying special attention to grasp temperature and temperature retention time, also should control the loading quantity of product and in stove, load coke manufacture reducing atmosphere；
C) magnetic field wind quenching or magnetic field air cooling: hook to pull out rapidly with rustless steel by product good for solid solution from high temperature furnace and put into air-cooled in magnetic field or air cooling, according to weather condition, being generally and blow abrupt wind cooling extremely hot season in summer, all the other times can breeze or natural cooling, magnetic intensity 240KA/m in atmosphere；
D) low temperature gives heat: loads in rustless steel capsule after being demagnetized by the product after solid solution wind quenching, sends in box-shaped resistance furnace and give heat, give 600 650 DEG C of temperature retention times of hot temperature and be not less than 20 30 minutes；
E) magnetic field isothermal: low temperature is given the good product of heat and sends into rapidly together in constant-temperature oven in company with the stainless steel box contained, rectifier current output is adjusted to 50 60A, now magnetic field intensity is about 240KA/m, start to calculate isothermal time when temperature reaches 800 DEG C, temperature retention time is about 15 20 minutes, when temperature retention time enough after, turn off magnetic field immediately, take out product slow cooling, when product size is bigger, this technique can be adopted when shape is more complicated, product saturating for solid solution is taken out rapidly from stove, being placed on cartridge air cooling constantly stirs product, to ensure the cooling of product surrounding uniformly, when product is cooled to 900 950 DEG C, in time product is sandwiched magnetic field, it is covered with insulation fibre, make product Slow cooling in magnetic field, after 18 minutes, open insulation fibre, product should be kermesinus, cooling rate general control is at 15 20 DEG C/minute as well；
F) multistage aging tempering: the product after magnetic field is processed, load in 12KW chamber type annealing stove, burner hearth bottom corrosion resistant plate, plate pad puts grid-type brandreth, product installs with certain interval by group, good in order to conduction of heat, uniformly, each charge weight controls about 20 30Kg, and stove gate refractory fibre seals shelves；
G), after tempering terminates, stove is cooled to about less than 200 DEG C and comes out of the stove。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699408.2A CN105695671A (en) | 2014-11-28 | 2014-11-28 | Magnetic steel heat treatment technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410699408.2A CN105695671A (en) | 2014-11-28 | 2014-11-28 | Magnetic steel heat treatment technology |
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| CN105695671A true CN105695671A (en) | 2016-06-22 |
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| CN201410699408.2A Pending CN105695671A (en) | 2014-11-28 | 2014-11-28 | Magnetic steel heat treatment technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3981889A1 (en) * | 2020-10-09 | 2022-04-13 | Outokumpu Oyj | Method for producing stainless steel |
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- 2014-11-28 CN CN201410699408.2A patent/CN105695671A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3981889A1 (en) * | 2020-10-09 | 2022-04-13 | Outokumpu Oyj | Method for producing stainless steel |
| WO2022074229A1 (en) * | 2020-10-09 | 2022-04-14 | Outokumpu Oyj | Method for producing stainless steel |
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Application publication date: 20160622 |
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