CN1003720B - Ferritic heat-resistant non-scaling steel - Google Patents
Ferritic heat-resistant non-scaling steel Download PDFInfo
- Publication number
- CN1003720B CN1003720B CN87104960.0A CN87104960A CN1003720B CN 1003720 B CN1003720 B CN 1003720B CN 87104960 A CN87104960 A CN 87104960A CN 1003720 B CN1003720 B CN 1003720B
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- China
- Prior art keywords
- steel
- resistant non
- ferritic heat
- alloy
- present
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 3
- 239000004615 ingredient Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 abstract description 9
- 238000007254 oxidation reaction Methods 0.000 abstract description 9
- 229910002060 Fe-Cr-Al alloy Inorganic materials 0.000 abstract description 4
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 3
- 150000002910 rare earth metals Chemical class 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 description 11
- 239000000956 alloy Substances 0.000 description 11
- 230000003078 antioxidant effect Effects 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 208000021017 Weight Gain Diseases 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004584 weight gain Effects 0.000 description 4
- 235000019786 weight gain Nutrition 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 235000006708 antioxidants Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 210000003298 dental enamel Anatomy 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910019819 Cr—Si Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000005211 surface analysis Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Heat Treatment Of Steel (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a ferritic heat-resistant non-peeling steel. It is mainly suitable for various parts with working temperature less than 1000 ℃. On the basis of the common Fe-Cr-Al system components, the steel improves the Mn content, adds rare earth Ce and considers the comprehensive effects of C, Cr, Al, Si, Ti and Ce. The steel has excellent oxidation resistance at 1000 ℃ and good cold and hot workability.
Description
The invention belongs to the high temperature steel in the steel alloy.Mainly be applicable to working temperature less than 1000 ℃ various component, member, as pottery and enamel industry decorating firing kiln with become the firing stove in the members such as support, backing plate, drop hanger that use.
Usually, be used for pottery and enamel industry stove have Japanese SUS304, SUS309S, SUS310S and the U.S. with the typical material of member AISI304,309S, 310S etc.The tissue of above-mentioned grade of steel is austenite, and its intensity can reach 53 kilograms/millimeter
2About.Their main drawback is: contain higher Ni in (1) chemical ingredients, cost is higher; (2) easily come off at the formed Fe-Cr-Si type of hot conditions lower surface protective membrane; (3) thermal treatment temp height is 1010～1180 ℃.
U.S. Pat 4414023 and US3852063 are the high temperature steel of Fe-Cr-Al type, and chemical ingredients is comparatively complicated, thus need to adopt AOD method carbon elimination in the production technique, complex process, cost is higher.
The object of the present invention is to provide a kind of cheaply, production technique is simple, the oxida-tion-resistant steel of antioxidant property excellence.
In order to achieve the above object, be on the steel grades basis at common Fe-Cr-Al, improve Mn content, and added Rare-Earth Ce, consider the comprehensive action of C, Cr, Al, Si, Ti, Ce element simultaneously.
For guaranteeing under 800～1000 ℃ of temperature, to have certain antioxidant property, must add about 20% Cr.The resistance of oxidation of alloy improves with the increase of Cr content, but considers the hot and cold processing characteristics of alloy, and general Cr content should not surpass 25%.
Add about 3% Al in the steel, main effect is that to make the metallic surface form one deck thin and compact protective film (is Al
2O
3Film).Because aluminium has stronger rate of diffusion in ferrite, make alloy in the high temperature use, the metallic surface always maintains higher Al content, forms rich Al layer.The protective membrane that forms can stop oxygen to internal diffusion effectively, makes the at high temperature anti-oxidant non-scale of alloy.
Silicon can increase the adhesivity between alloy substrate and the protective membrane as the auxiliary element that improves antioxidant property, improves the anti-exfoliation ability of alloy, and the Si add-on is about 1%.
Ti can combine with the C in the steel, forms the gap phase of stabilizer pole, and the tendency that gathering is at high temperature grown up is little.Can stop crystal boundary to move strongly; Simultaneously, also can prevent under the high temperature or the Produced after Welding intergranular corrosion.
Improve Mn content, can guarantee the strength property of steel.
Add proper amount of rare-earth Ce in the steel, but cleaning molten steel improves steel product quality; Simultaneously can improve the crystal boundary state, improve the resistance to corrosion of crystal boundary, prevent that crystal boundary is by preferential oxidation under the high temperature.
For the above reasons, the present invention proposes a kind of novel Fe-Cr-Al is the ferrite oxida-tion-resistant steel.Its concrete chemical ingredients (weight %) is as follows:
0.03～0.10%C, 0.95～1.60%Si, 1.05～1.50%Mn, 16.0～22.0%Cr, 2.0～4.5%Al, 0.6～1%Ti, 0.002～0.2%Ce, surplus is Fe.
The present invention can adopt vacuum induction furnace or non-vacuum induction furnace to add the electroslag remelting to smelt, and adopts to forge or rollingly carry out hot-work, forges or rolling temperature is 1150～1270 ℃, and finish-forging or finishing temperature are greater than 850 ℃.The control finishing temperature can obtain the tiny ferritic structure of crystal grain, eliminates the fragility that causes owing to grain coarsening.
After the hot-work, need carry out finished product thermal treatment, general treatment temp is 730～800 ℃.
After heat treatment, the room-temperature mechanical property of this steel is: σ
bCan reach 70 kilograms/millimeter
2, 1000 ℃ of following 200 hours oxidation weight gains of temperature are 0.59 milligram/centimetre
2
With SUS304 and SUS310S with compare, it is simple that the present invention has technology, characteristics such as the low and antioxidant property excellence of cost.Table 1 has been enumerated above-mentioned contrast grade of steel and relevant performance comparison of the present invention.
Fig. 1 is the oxidation weight gain curve figure of the present invention and SUS304, SUS310S.Among the figure abscissa be the time (hour), ordinate be oxidation weight gain (milligram/centimetre
2), curve 1 is the present invention, and curve 2 is SUS304, and curve 3 is SUS310S.Find out that by figure along with the prolongation of time, the oxidation weight gain value rises, but lift velocity of the present invention all is lower than the contrast grade of steel.
Fig. 2 be the present invention at 1000 ℃, adopted the SEM(scanning electronic microscope down after the anti-oxidant test in 200 hours) the alloy surface analysis done.A, B, 3 of C are in upper layer, subsurface layer and the matrix location of alloy respectively among the figure, and a, b, c correspond respectively to the energy spectrogram of A, B, 3 surface analyses of C.Find out that by figure a the content of the bright alloy surface layer of the power spectrum graphs aluminium element that the A point is corresponding is the highest, what the surface formed must be the oxide compound of aluminium, and alloy is played main protective effect; Found out that by figure b what the B point was corresponding can illustrate that Fe, Cr, the Al unit of subsurface layer have higher concentration by spectrogram, can form the oxide compound of three elements, wherein the content of aluminium remains higher, illustrates that aluminium at high temperature has stronger diffusibility; The power spectrum graphs of figure C has been shown the matrix composition of alloy.
Embodiment
Smelt 3 stoves steel grade of the present invention on vacuum induction furnace, its concrete chemical ingredients (weight %) is as shown in table 2.Molten steel pours into 22 kilograms steel ingot.Steel ingot forges into 25 * 125mm slab material after 1200 ℃ of heating, be rolled into the sheet material that thickness is 2.5～3.0mm again, and heat-treats at 780 ℃.Measured the mechanical property of 3 heat (batch) numbers after the thermal treatment, as shown in 3.
The performance comparison of table 1. the present invention and SUS304, SUS310S steel
Table 2, embodiment chemical ingredients (weight %)
The mechanical property of table 3, embodiment
Claims (1)
1, a kind of heat-risistant, non-scaling ferritic steel, it is characterized in that chemical ingredients (weight %) by 0.03～0.10%C, 0.95～1.60%Si, 1.05～1.50%Mn, 16.0～22.0%Cr, 2.0～4.5%Al, 0.6～1.0%Ti, 0.002～0.2%Ce, surplusly form for Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87104960.0A CN1003720B (en) | 1987-07-27 | 1987-07-27 | Ferritic heat-resistant non-scaling steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87104960.0A CN1003720B (en) | 1987-07-27 | 1987-07-27 | Ferritic heat-resistant non-scaling steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1031260A CN1031260A (en) | 1989-02-22 |
| CN1003720B true CN1003720B (en) | 1989-03-29 |
Family
ID=4815086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87104960.0A Expired CN1003720B (en) | 1987-07-27 | 1987-07-27 | Ferritic heat-resistant non-scaling steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003720B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056420C (en) * | 1995-12-01 | 2000-09-13 | 首钢总公司 | High-temp antioxidant chromium-silicon cast steel |
| KR20180017220A (en) * | 2010-09-16 | 2018-02-20 | 닛폰 스틸 앤드 스미킨 스테인레스 스틸 코포레이션 | Heat-resistant ferrite-type stainless steel plate having excellent oxidation resistance |
-
1987
- 1987-07-27 CN CN87104960.0A patent/CN1003720B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031260A (en) | 1989-02-22 |
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