CN108754106A - A kind of heat treatment process of automobile micro machine non-orientation silicon steel - Google Patents
A kind of heat treatment process of automobile micro machine non-orientation silicon steel Download PDFInfo
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- CN108754106A CN108754106A CN201810576692.2A CN201810576692A CN108754106A CN 108754106 A CN108754106 A CN 108754106A CN 201810576692 A CN201810576692 A CN 201810576692A CN 108754106 A CN108754106 A CN 108754106A
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 45
- 238000010438 heat treatment Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000008569 process Effects 0.000 title claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 38
- 239000010959 steel Substances 0.000 claims description 38
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 29
- 238000005098 hot rolling Methods 0.000 claims description 20
- 238000005097 cold rolling Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 15
- 238000005121 nitriding Methods 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000000137 annealing Methods 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000001953 recrystallisation Methods 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 239000012159 carrier gas Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 229910052718 tin Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000005542 laser surface treatment Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 230000013011 mating Effects 0.000 abstract description 3
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
-
- 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
-
- 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
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—Cold rolling
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1261—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest following hot rolling
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
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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)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The present invention relates to a kind of heat treatment process of automobile micro machine non-orientation silicon steel, pass through the finished products of Nitrizing Treatment+Laser Surface Treatment+particular atmosphere and the type of cooling under particular atmosphere, improve the heat treatment process of non-orientation silicon steel, for the optimal processing step of silicon steel mating chemical composition and parameter area, so that final non-orientation silicon steel finished product, not only magnetic property is excellent, and process costs are controllable, and performance is fully able to meet the application demand of the electrical sheets commodity such as automobile micro machine.
Description
Technical field
The present invention relates to metal heat treatmet field, in particular to a kind of automobile micro machine non-orientation silicon steel
Heat treatment process.
Background technology
Micro machine (small and special electric machine) typically refers to diameter less than 160mm or rated power is less than 750W or has particularity
The motor of energy, specific use.But with the development of science and technology with the expansion of application field, the volume and output work of micro machine
Rate has all breached these ranges, and the power of some specific type of electric machines has accomplished 30~100kW or even bigger.Micro machine kind is many
It is more, it is planted so far more than more than 5000, and specification is complicated, market application field is very extensive.One general-utility car generally requires 15
The micro machine of left and right, and limousine may then need 40~100, as automatic ration electronic oil injection system replaces traditional carburetion
Device, ABS brakes all change by motor replacement etc..
The Influence of production of non-orientation silicon steel product is many because being known as, such as steel plate thickness, grain structure and size, chemical composition
Deng.Assuming that the chemical composition and thickness of non-orientation silicon steel are stablized, magnetism is determined by grain structure and size, then is heat-treated
The technological parameters such as time, temperature will be magnetic deciding factor.By reasonably selecting heat treatment process step and its technique
Parameter area increases favorable texture ratio, obtains ideal crystal grain standard, is to reach to improve No yield point magnetism electrician comprehensively at present
The most effective mode of the overall performance of steel.Therefore, how heat treatment process is improved, obtains ideal silicon steel crystal texture,
And then good magnetic property is obtained, it is the Main way and tackling key problem difficult point of current electrical sheet area research.
Invention content
In order to solve the above technical problem, the present invention provides a kind of heat treatment works of automobile micro machine non-orientation silicon steel
Skill, this method can improve the magnetic induction intensity of silicon steel product, reduce iron loss, improve silicon steel crystal texture, obtain good make
With service life and application performance.
A kind of heat treatment process of automobile micro machine non-orientation silicon steel, including：
Step 1)：By Heating Steel Ingots to 1000~1200 DEG C of progress hot rollings, the steel plate thickness after hot rolling is 2.5~4.5mm,
Hot rolling coiling temperature is 550 DEG C or more, is then heated to 650~850 DEG C and anneals, and annealing soaking time is 10~60 seconds.
Step 2)：Steel plate after hot-roll annealing is subjected to cold rolling, cold rolling reduction ratio is 80~85%, it is made 0.35~
The cold-reduced sheet of 0.65mm.
Step 3)：Steel plate after cold rolling is put into heat-treatment furnace, vacuumizes and reaches 30~50Pa, high-voltage electricity 450V~
500V, temperature are 770~850 DEG C, and 10 are pressed using nitrogen and hydrogen:1 ratio as nitriding gas, using high purity argon as
Carrier gas, nitriding gas account for the 1.5% of total gas flow, and nitriding soaking time is 15~20 minutes, and carries out secondary recrystallization.
Step 4)：In an inert atmosphere by the steel plate after recrystallization, it is surface-treated using laser, laser work(
Rate is 5~10kW, 2~3mm of spot width, 6~10mm/s of sweep speed.
Step 5)：By the steel plate after surface treatment in 75%H2And 25%N2Under atmosphere, heated with the heating rate of 50 DEG C/h
To 1150~1250 DEG C, then in 100% high-purity H2Lower heat preservation 20~24 hours, the then fast quickly cooling under 0 DEG C~-30 DEG C environment
But, non-orientation silicon steel finished product is obtained.
The component and weight percent content of the steel ingot be：C：0.035%~0.055%, Si：2.0%~3.5%,
Mn：0.2%~0.5%, Sn：0.01%~0.20%, Als：0.5%~1.5%, Ti<0.002%；O<20ppm, S<
20ppm, N<15ppm, surplus meet Si+Al≤4.0% by Fe and inevitable impurity.
The finish rolling finishing temperature of the hot rolling is 840 DEG C.
The crystallite dimension of the non-orientation silicon steel finished product is controlled at 100~150 μm or so.
The magnetic strength B of the non-orientation silicon steel finished product2500=1.60~1.66T, iron loss P17/50=2.25~2.50W/kg.
Compared with prior art, it is an advantage of the invention that：By Nitrizing Treatment+Laser Surface Treatment under particular atmosphere+
The finished products of particular atmosphere and the type of cooling improve the heat treatment process of non-orientation silicon steel, most suitable for silicon steel mating chemical composition
When processing step and parameter area so that final non-orientation silicon steel finished product, not only magnetic property is excellent, and process costs are controllable,
And performance is fully able to meet the application demand of the electrical sheets commodity such as automobile micro machine.
Specific implementation mode
Separation vehicle has：Cargo vehicle, car and car.General general-utility car has a electric motor product, middle height more than ten
The car at end is more than 50 electric motor products, is required for taking electrical sheet to make iron core with nothing, also other magnetism such as useful amorphous
Material.The motor of low frequency and low-power can be used more as general-utility car engine, therefore the requirement characteristic to electrical sheet
Not high, the low code non-oriented electrical steel in, only sub-fraction motor use high grade non-oriented electrical steel, for
Automobile small-sized electronic product and micromotor iron core etc. generally use the high trade mark (efficient) non-oriented electrical steel, some are common
High grade non-oriented electrical steel cannot be satisfied requirement, need low using medium-high frequencies such as 0.35mm, 0.30mm, 0.20mm, 0.15mm
The non-oriented electrical steel and strip of iron loss.
The crystal grain of metal all presses specific orientations, and magnetism and the crystal grain texture of electrical sheet have strong dependence.It is brilliant
Grain (100) face is there are two easy magnetizing axis, and there are one easy magnetizing axis in (110) face, and (112) and (111) are to be most difficult to magnetized texture, institute
With the crystal grain ratio of increase (100) and (110) texture, iron loss is made to reduce；Iron loss is with (112) and (111) crystal grain texture ratio
Increase and increases.
In technical scheme of the present invention, by coordinating the specific heat treatment process step of selection and ginseng according to silicon steel ingredient
Number, is conducive to the raising magnetic induction intensity of final non-orientation silicon steel product.Also, why the present invention takes under particular atmosphere
The heat treatment mode of the finished products of Nitrizing Treatment+Laser Surface Treatment+particular atmosphere and the type of cooling, exactly in order to improve silicon
Steel microstructure reduces silicon steel iron loss, improves magnetic induction intensity.
With reference to embodiment and comparative example, the present invention is described in more detail.
Embodiment 1：
A kind of heat treatment process of automobile micro machine non-orientation silicon steel, including：
Step 1)：By Heating Steel Ingots to 1000 DEG C of progress hot rollings, the steel plate thickness after hot rolling is 2.5mm, hot rolling curling temperature
Degree is 550 DEG C, is then heated to 650 DEG C and anneals, and annealing soaking time is 60 seconds.
Step 2)：Steel plate after hot-roll annealing is subjected to cold rolling, cold rolling reduction ratio is 85%, and the cold rolling of 0.35mm is made
Plate.
Step 3)：Steel plate after cold rolling is put into heat-treatment furnace, vacuumizes and reaches 30Pa, high-voltage electricity 450V, temperature is
850 DEG C, 10 are pressed using nitrogen and hydrogen:1 ratio is as nitriding gas, using high purity argon as carrier gas, nitriding gas
Body accounts for the 1.5% of total gas flow, and nitriding soaking time is 20 minutes, and carries out secondary recrystallization.
Step 4)：In an inert atmosphere by the steel plate after recrystallization, it is surface-treated using laser, laser work(
Rate is 5kW, spot width 3mm, sweep speed 6mm/s.
Step 5)：By the steel plate after surface treatment in 75%H2And 25%N2Under atmosphere, heated with the heating rate of 50 DEG C/h
To 1150 DEG C, then in 100% high-purity H2Lower heat preservation 20 hours, is then quickly cooled down under 0 DEG C of environment, obtains non-orientation silicon steel
Finished product.
The component and weight percent content of the steel ingot be：C：0.035%, Si：2.0%, Mn：0.5%, Sn：
0.20%, Als：1.5%, Ti：0.001%；O<20ppm, S<20ppm, N<15ppm, surplus is by Fe and inevitable impurity.
The finish rolling finishing temperature of the hot rolling is 840 DEG C.
The crystallite dimension of the non-orientation silicon steel finished product is controlled at 100 μm or so.
The magnetic strength B of the non-orientation silicon steel finished product2500=1.60T, iron loss P17/50=2.25W/kg.
Embodiment 2：
A kind of heat treatment process of automobile micro machine non-orientation silicon steel, including：
Step 1)：By Heating Steel Ingots to 1200 DEG C of progress hot rollings, the steel plate thickness after hot rolling is 4.5mm, hot rolling curling temperature
Degree is 570 DEG C, is then heated to 850 DEG C and anneals, and annealing soaking time is 10 seconds.
Step 2)：Steel plate after hot-roll annealing is subjected to cold rolling, cold rolling reduction ratio is 83%, and the cold rolling of 0.45mm is made
Plate.
Step 3)：Steel plate after cold rolling is put into heat-treatment furnace, vacuumizes and reaches 40Pa, high-voltage electricity 480V, temperature is
800 DEG C, 10 are pressed using nitrogen and hydrogen:1 ratio is as nitriding gas, using high purity argon as carrier gas, nitriding gas
Body accounts for the 1.5% of total gas flow, and nitriding soaking time is 18 minutes, and carries out secondary recrystallization.
Step 4)：In an inert atmosphere by the steel plate after recrystallization, it is surface-treated using laser, laser work(
Rate is 10kW, spot width 3mm, sweep speed 6mm/s.
Step 5)：By the steel plate after surface treatment in 75%H2And 25%N2Under atmosphere, heated with the heating rate of 50 DEG C/h
To 1250 DEG C, then in 100% high-purity H2Lower heat preservation 24 hours, is then quickly cooled down under -30 DEG C of environment, obtains No yield point silicon
Steel finished product.
The component and weight percent content of the steel ingot be：C：0.055%, Si：3.5%, Mn：0.5%, Sn：
0.01%, Als：0.5%, Ti：0.001%；O<20ppm, S<20ppm, N<15ppm, surplus is by Fe and inevitable impurity.
The finish rolling finishing temperature of the hot rolling is 840 DEG C.
The crystallite dimension of the non-orientation silicon steel finished product is controlled at 150 μm or so.
The magnetic strength B of the non-orientation silicon steel finished product2500=1.66T, iron loss P17/50=2.25W/kg.
Embodiment 3：
A kind of heat treatment process of automobile micro machine non-orientation silicon steel, including：
Step 1)：By Heating Steel Ingots to 1100 DEG C of progress hot rollings, the steel plate thickness after hot rolling is 3.5mm, hot rolling curling temperature
Degree is 560 DEG C, is then heated to 700 DEG C and anneals, and annealing soaking time is 40 seconds.
Step 2)：Steel plate after hot-roll annealing is subjected to cold rolling, cold rolling reduction ratio is 82%, and the cold rolling of 0.55mm is made
Plate.
Step 3)：Steel plate after cold rolling is put into heat-treatment furnace, vacuumizes and reaches 50Pa, high-voltage electricity 460V, temperature is
830 DEG C, 10 are pressed using nitrogen and hydrogen:1 ratio is as nitriding gas, using high purity argon as carrier gas, nitriding gas
Body accounts for the 1.5% of total gas flow, and nitriding soaking time is 18 minutes, and carries out secondary recrystallization.
Step 4)：In an inert atmosphere by the steel plate after recrystallization, it is surface-treated using laser, laser work(
Rate is 6kW, spot width 3mm, sweep speed 7mm/s.
Step 5)：By the steel plate after surface treatment in 75%H2And 25%N2Under atmosphere, heated with the heating rate of 50 DEG C/h
To 1200 DEG C, then in 100% high-purity H2Lower heat preservation 22 hours, is then quickly cooled down under -20 DEG C of environment, obtains No yield point silicon
Steel finished product.
The component and weight percent content of the steel ingot be：C：0.045%, Si：2.5%, Mn：0.3%, Sn：
0.08%, Als：1.2%, Ti：0.001%；O<20ppm, S<20ppm, N<15ppm, surplus is by Fe and inevitable impurity.
The finish rolling finishing temperature of the hot rolling is 840 DEG C.
The crystallite dimension of the non-orientation silicon steel finished product is controlled at 120 μm or so.
The magnetic strength B of the non-orientation silicon steel finished product2500=1.64T, iron loss P17/50=2.35W/kg.
Comparative example 1：
In the manufacturing method of the present invention, when changing the selection of silicon steel steel ingot element, the step of heat treatment process and parameter
Range remains unchanged, then will influence the magnetic property of final products, cause iron loss increase or magnetic flux reduce.
Comparative example 2：
When the parameter of annealing process and process of surface treatment changes, silicon steel microstructure change, crystal grain will be caused
Size and texture structure are undesirable, increase magnetic hystersis loss, and comprehensive magnetic can reduce, and service life declines.
It can be seen from embodiment 1-3 and comparative example 1 and 2 the experimental results showed that：The present invention passes through oozing under particular atmosphere
The finished products of nitrogen processing+Laser Surface Treatment+particular atmosphere and the type of cooling, improve the heat treatment process of non-orientation silicon steel,
For the optimal processing step of silicon steel mating chemical composition and parameter area so that final non-orientation silicon steel finished product, it is not only magnetic
Can be excellent, process costs are controllable, and performance is fully able to meet the application demand of the electrical sheets commodity such as automobile micro machine.
While there has been shown and described that the embodiment of this patent, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle and objective of this patent a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of patent is limited by claim and its equivalent.
Claims (5)
1. a kind of heat treatment process of automobile micro machine non-orientation silicon steel, which is characterized in that the heat treatment process includes：
Step 1)：By Heating Steel Ingots to 1000~1200 DEG C of progress hot rollings, the steel plate thickness after hot rolling is 2.5~4.5mm, hot rolling
Coiling temperature is 550 DEG C or more, is then heated to 650~850 DEG C and anneals, and annealing soaking time is 10~60 seconds；
Step 2)：Steel plate after hot-roll annealing is subjected to cold rolling, cold rolling reduction ratio is 80~85%, is made 0.35~0.65mm's
Cold-reduced sheet；
Step 3)：Steel plate after cold rolling is put into heat-treatment furnace, vacuumizes and reaches 30~50Pa, 450~500V of high-voltage electricity, temperature
Degree is 770~850 DEG C, and 10 are pressed using nitrogen and hydrogen:1 ratio is as nitriding gas, using high purity argon as carrier gas
Body, nitriding gas account for the 1.5% of total gas flow, and nitriding soaking time is 15~20 minutes, and carries out secondary recrystallization；
Step 4)：In an inert atmosphere by the steel plate after recrystallization, it is surface-treated using laser, laser power is
5~10kW, 2~3mm of spot width, 6~10mm/s of sweep speed；
Step 5)：By the steel plate after surface treatment in 75%H2And 25%N2Under atmosphere, it is heated to the heating rate of 50 DEG C/h
1150~1250 DEG C, then in 100% high-purity H2Lower heat preservation 20~24 hours, the then fast quickly cooling under 0 DEG C~-30 DEG C environment
But, non-orientation silicon steel finished product is obtained.
2. heat treatment process as claimed in claim 1 or 2, it is characterised in that：The component and weight percent of the steel ingot contain
Amount is：C：0.035%~0.055%, Si：2.0%~3.5%, Mn：0.2%~0.5%, Sn：0.01%~0.20%, Al：
0.5%~1.5%, Ti<0.002%；O<20ppm, S<20ppm, N<15ppm, surplus are met by Fe and inevitable impurity
Si+Al≤4.0%.
3. heat treatment process as claimed in claim 1 or 2, it is characterised in that：The finish rolling finishing temperature of the hot rolling is 840
℃。
4. heat treatment process as claimed in claim 1 or 2, it is characterised in that：Control the crystal grain of the non-orientation silicon steel finished product
Size is at 100~150 μm or so.
5. the heat treatment process as described in claim 1 to 5, it is characterised in that：The magnetic strength B of the non-orientation silicon steel finished product2500=
1.60~1.66T, iron loss P17/50=2.25~2.50W/kg.
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| CN201810576692.2A CN108754106A (en) | 2018-06-07 | 2018-06-07 | A kind of heat treatment process of automobile micro machine non-orientation silicon steel |
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| CN (1) | CN108754106A (en) |
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| CN110195148A (en) * | 2019-06-02 | 2019-09-03 | 郭慧敏 | A kind of high magnetic induction grain-oriented silicon steel heat treatment process |
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| CN103429767A (en) * | 2011-02-14 | 2013-12-04 | 蒂森克虏伯电工钢有限公司 | Method for producing a grain-oriented flat steel product |
| CN106702260A (en) * | 2016-12-02 | 2017-05-24 | 武汉钢铁股份有限公司 | High-magnetic-inductivity low-iron-loss non-oriented silicon steel and production method thereof |
| CN106755875A (en) * | 2016-12-02 | 2017-05-31 | 武汉钢铁股份有限公司 | High-magnetic strength non-oriented silicon steel continuous annealing technique high |
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| CN1948517A (en) * | 2005-10-15 | 2007-04-18 | 鞍钢集团新钢铁有限责任公司 | Manufacturing method of cold rolling electric steel special for compressor |
| CN103429767A (en) * | 2011-02-14 | 2013-12-04 | 蒂森克虏伯电工钢有限公司 | Method for producing a grain-oriented flat steel product |
| CN106702260A (en) * | 2016-12-02 | 2017-05-24 | 武汉钢铁股份有限公司 | High-magnetic-inductivity low-iron-loss non-oriented silicon steel and production method thereof |
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| CN110195148A (en) * | 2019-06-02 | 2019-09-03 | 郭慧敏 | A kind of high magnetic induction grain-oriented silicon steel heat treatment process |
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Application publication date: 20181106 |