CN102383050A - Cr-Ni based high temperature-resistant oxyaustenitic heat-resistant steel bar and preparation method thereof - Google Patents
Cr-Ni based high temperature-resistant oxyaustenitic heat-resistant steel bar and preparation method thereof Download PDFInfo
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- CN102383050A CN102383050A CN2011103638561A CN201110363856A CN102383050A CN 102383050 A CN102383050 A CN 102383050A CN 2011103638561 A CN2011103638561 A CN 2011103638561A CN 201110363856 A CN201110363856 A CN 201110363856A CN 102383050 A CN102383050 A CN 102383050A
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Abstract
A Cr-Ni based high temperature-resistant oxyaustenitic heat-resistant steel bar and a preparation method thereof belong to the technical field of heat-resistant steel bars. The bar comprises the following components: 0.08-0.18% of C, 0.2-1.20% of Si, 0.50-1.50% of Mn, not more than 0.030% of P, not more than 0.020% of S, 22.0-32.0% of Cr, 12.0-18.0% of Ni, 0.3-1.0% of Mo, 0.08-0.32% of N, 0.5-1.5% of Al, 0.005-0.05% of (La+Ce), wherein the oxygen content is not more than 40 ppm, and the balance of Fe and inevitable impurities. The process comprises vacuum smelting and forging; the following technical parameters are controlled during the process: a steel ingot cogging temperature of 1150-1170 DEG C, an initial forging temperature of 1130-1150 DEG C, and a final forging temperature of 900-930 DEG C; air cooling is performed after forging. The steel bar of the invention has the advantages of less inclusion, high strength, and good antioxidation performance.
Description
Technical field
The invention belongs to high temperature steel bar technical field, particularly relating to a kind of Cr-Ni is resistance to high temperature oxidation austenite heat-resistance Steel Bar During and preparation method thereof, is applicable to fields such as metallurgy, machinery, chemical industry.
Background technology
In the prior art, high temperature steel often is used to make strength members such as power station, boiler, internal combustion turbine, oil engine, aircraft engine.In order to satisfy various parts requirements of one's work under comparatively high temps, international and domesticly developed a series of high temperature steel and the alloy that is used for work under the high temperature.These high temperature steel can be divided into pearlite type high temperature steel, martensite type refractory steel, Austenitic high temperature steel, ferrite type high temperature steel and precipitation hardenable high temperature steel according to tissue.Pearlite type high temperature steel belongs to Mayari usually, and working temperature generally can reach 600～620 ℃; Martensite type refractory steel is main with the 12%Cr type, is mainly used in parts such as making turbine blade, rotor, and working temperature is 550～650 ℃; Contain the Cr amount in the ferrite type high temperature steel and surpass 12% usually, but because its over-all properties is relatively poor, so its application is restricted; Precipitation hardenable high temperature steel is representative with 17-4PH and 15-5PH, and this type steel has higher heat resistance and enough oxidation-resistances in 540～650 ℃ of scopes.
Austenitic high temperature steel is important a type in the high temperature steel because its working temperature is high, under comparatively high temps, have higher heat resistance more and more receive with excellent oxidation-resistance people's attention.The representative steel grade of this type high temperature steel is to contain the Cr amount to be higher than 8% Cr-Ni series austenite high temperature steel, like 18Cr-8Ni, 25Cr-20Ni etc.The general parts that are used for bearing more than 600 ℃ higher stress of making, its oxidation-resistance can reach 850～1250 ℃, is one type of the highest high temperature steel of oxidation-resistance in the high temperature steel.0Cr25Ni20 (U.S. trade mark AISI 310S) is because alloy content is high, and especially Cr content is up to 25%, thereby has excellent antioxidant property at this type steel grade.The nineties Japanese has invented NAR-AH4 high temperature steel in last century; Be to be the basis with 310S, in steel, added the N element, reduced Ni content; Thereby reached the antioxidant property close with 310S, the latter has good antioxidant property at 1000～1100 ℃.
What the moulding process of steel bar was commonly used has forging perhaps rolling; Forging is through forging hammer or fast forging machine metal stock to be exerted pressure, and makes it produce viscous deformation to obtain to have certain mechanical property, the working method of definite shape and dimension workpiece; Rolling is with the gap (different shape) of metal stock through a pair of rotary roller; Because of receiving the compression of roll that material section is reduced, the pressure processing method that length increases can be realized efficiently, produce fast through rolling.Forge hot still is a hot-rolled temperature to the performance of steel and lumber recovery influence all is vital.Temperature is too high, and the steel interior tissue is thick, and grain-boundary weakness causes waste product and performance inconsistency easily, and temperature is crossed and low then caused drag excessive, and steel are prone to crackle and scrap, therefore in hot procedure, select suitable opening forge and final forging temperature extremely important.
Summary of the invention
The object of the present invention is to provide a kind of Cr-Ni is resistance to high temperature oxidation austenite heat-resistance Steel Bar During and preparation method thereof, has obtained to have the high temperature steel forge hot bar of high cleanliness, HS, good oxidation resistance.
The chemical component weight per-cent of austenite heat-resistance Steel Bar During of the present invention is: C:0.08～0.18%, Si:0.2～1.2%, Mn:0.50～1.50%; P≤0.030%, S≤0.020%, Cr:22.0～32.0%; Ni:12.0～18.0%, Mo:0.3～1.0%, N:0.08～0.32%; Al:0.5～1.5%, (La+Ce): 0.005～0.05%, wherein oxygen level is not more than 40ppm (promptly≤0.004%).Surplus is Fe and unavoidable impurities.
Technology of the present invention comprises vacuum metling, forging; The following technical parameter of control in technology:
1160 ℃ ± 10 ℃ of steel ingot cogging temperature are opened and are forged 1140 ± 10 ℃ of temperature, and final forging temperature is 900～930 ℃, forge the back air cooling.Bar after the forging has good heat resistance and antioxidant property.
Key of the present invention is: the reasonable control of reasonably optimizing and elemental gas through steel interalloy element has obtained the few high-property heat resistant steel of high heat-intensity, high antioxidant and inclusion.Simultaneously, through selecting suitable thermomechanical parameter, produced satisfactory forge hot bar.
Alloying element in the high temperature steel is extremely important; Every kind of alloying element all has effect separately, and like the C in the steel, C can form carbide with carbide forming element Ti, V, Cr, Fe in alloy increase the intensity of steel; Especially austenitic heat-resistance steel; In process of cooling, do not have phase transformation in the tissue, schedule of reinforcement is carbide reinforced in addition except solution strengthening, so C content is very big to the intensity and the plasticity influence of steel.C content is low, undercapacity, and the C too high levels, plasticity deficiency and welding property are bad; Si is the beneficial element of resistance to high temperature corrosion in the high temperature steel, under the high temperature, can form the good SiO of layer of protecting property on the high temperature steel surface that contains Si
2Film.Tangible antioxidant effect is just arranged when si content reaches 1% in the steel; Mn is reductor and a sweetening agent good in the steel, and Mn and Fe form sosoloid can improve austenitic hardness and intensity; Cr is an alloying element important in the high temperature steel, and the Cr that contains in the steel above 12% will make steel have excellent corrosion resisting performance.Cr in the steel can react with oxygen in high-temperature oxidation process, generates fine and close Cr on the surface of steel
2O
3Film stops the further reaction of oxygen and matrix, played oxidation resistant effect, so the Cr content in the high temperature steel should not be too low, and Cr content is 22～32% among the present invention; Ni plays a part adjustment phase composite and solution strengthening in austenitic heat-resistance steel, in order to guarantee to obtain austenite structure, Ni content also will improve accordingly in the high temperature steel of high Cr; Mo also is a kind of element important in the high temperature steel, and high temperature steel the earliest is exactly in General Structural Steel, to have added the Mo element just to have had certain heat resistance.The adding that contains the Mo steel makes high temperature steel Mo under the condition of high temperature move to carbide, can further improve the heat resistance of steel; N is strong austenite former, and its effect is similar with C, adds a certain amount of N in the steel, can improve the intensity of steel, can reduce Ni content simultaneously, plays the effect of joint Ni; Al also is an oxidation resistant important alloying element in the high temperature steel, and the high temperature steel that contains Al forms the good Al of layer of protecting property at its surface energy
2O
3Film plays good antioxygenation, but Al too high levels in the steel can make steel be difficult to plastic working and welding; The oxide compound of REE (La+Ce) has " pinning " effect to matrix metal, can increase the sticking power between matrix metal and the sull.Simultaneously, REE also is a desulfurization getter good in the steel, can remove other detrimental impurity, can improve the shape and the distribution of steel inclusion, thereby improves the quality and the resistance toheat of steel.
Compared with prior art, beneficial effect of the present invention is:
Through reasonably optimizing and collocation to each element in the high temperature steel, and the choose reasonable of thermomechanical parameter, few, the high cleanliness of bar inclusion that processes; Intensity is high, antioxidant property is good.
Embodiment
Below in conjunction with an exemplary embodiments the present invention is described further.
In the present embodiment, the concrete composition of the novel austenitic heat-resistance steel of employing is as shown in table 1.Concrete technical process is: select fine fodder for use, adopt vacuum induction furnace smelting, the steel ingot cogging temperature of smelting is 1160 ℃ ± 10 ℃.Steel billet after the cogging is removed chink and surface imperfection through surface finish, the shove charge heating.Steel billet is opened and is forged 1140 ± 10 ℃ of temperature, and the back air cooling is forged in final forging temperature＞900 ℃.Bar after the forging is used for the room temperature after composition analysis, inclusion evaluation, the thermal treatment and mechanical behavior under high temperature detects and the antioxidant property test.
Table 2 is seen in the non-metallic inclusion contrast of the embodiment of the invention and contrast material austenitic heat-resistance steel AISI 310S and NAR-AH4; Because oxygen content in steel of the present invention is lower; Nonmetallic inclusionsin steel especially oxide compound rank all is lower than AISI 310S and NAR-AH4, shows that steel of the present invention has higher purity.
Table 3 is seen in the tensile property contrast of the contrast material NAR-AH4 austenitic heat-resistance steel that two stove steel are close with composition in the embodiment of the invention under the different heat treatment system.Visible from table, the present invention and the identical heat treating regime of NAR-AH4 process, under the identical time, tensile strength of the present invention shows that apparently higher than NAR-AH4 the present invention has higher intensity 900 ℃ of following timeliness.
Table 4 is the present invention and the high temperature tensile properties contrast of contrast material NAR-AH4 austenitic heat-resistance steel under the different heat treatment system, and same high temperature tensile strength of the present invention also is higher than contrast material NAR-AH4.
Another remarkable advantage of the present invention is at high temperature to have good antioxidant property; Table 5 is seen in the present invention and two kinds of contrast material antioxidant property contrasts under differing temps; Therefrom visible; At uniform temp and under the identical time,, and make the present invention have better antioxidant property because the present invention has carried out rational proportion to anti-oxidant element Cr, Al, La+Ce etc.
Table 1 embodiment of the invention chemical ingredients and comparative alloy composition (wt%)
Table 2 embodiment of the invention and contrast material inclusion rank
Table 3 embodiment of the invention and contrast material NAR-AH4 room temperature tensile performance comparison
Annotate: Rm-tensile strength, the intensity index of material; Rp
0.2(MPa)-and ys, the intensity index of material;
The A-elongation after fracture, the plasticity index of material; The Z-relative reduction in area, the plasticity index of material.
Table 4 embodiment of the invention and the contrast of contrast material NAR-AH4 high temperature tensile properties
Antioxidant property contrast table 5 the present invention and contrast material are incubated 200 hours under differing temps after
Claims (2)
1. a Cr-Ni is a resistance to high temperature oxidation austenite heat-resistance Steel Bar During, it is characterized in that chemical component weight per-cent is: C:0.08～0.18%, Si:0.2～1.20%; Mn:0.50～1.50%, P≤0.030%, S≤0.020%, Cr:22.0～32.0%; Ni:12.0～18.0%, Mo:0.3～1.0%, N:0.08～0.32%, Al:0.5～1.5%; (La+Ce): 0.005～0.05%, wherein oxygen level is not more than 40ppm, and surplus is Fe and unavoidable impurities.
2. the preparation method of the described austenite heat-resistance Steel Bar During of claim 1, technology comprises vacuum metling, forging; It is characterized in that: the following technical parameter of control in technology:
1150～1170 ℃ of steel ingot cogging temperature,
Open and forge 1130～1150 ℃ of temperature,
Final forging temperature: 900～930 ℃, forge the back air cooling.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888568A (en) * | 2012-09-14 | 2013-01-23 | 攀钢集团江油长城特殊钢有限公司 | Austenite nickel-saving and heat-resisting steel plate and manufacturing method thereof |
| CN103397276A (en) * | 2013-08-12 | 2013-11-20 | 钢铁研究总院 | High-strength nickel-saving air valve steel and preparation method thereof |
| CN104148555A (en) * | 2014-06-30 | 2014-11-19 | 贵州安大航空锻造有限责任公司 | Forge forming method for 1Cr14Mn14Ni stainless steel ring part |
| CN109576580A (en) * | 2018-11-29 | 2019-04-05 | 武汉华培动力科技有限公司 | Diesel engine pressure booster with variable cross section nozzle assembly heat resisting steel and smelting process |
| CN113549820A (en) * | 2021-06-29 | 2021-10-26 | 鞍钢股份有限公司 | High-carbon low-ferrite-content austenitic stainless steel plate and production method thereof |
| CN116043132A (en) * | 2021-10-28 | 2023-05-02 | 江苏新华合金有限公司 | 314 heat-resistant steel wire and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11279714A (en) * | 1998-03-31 | 1999-10-12 | Nippon Steel Corp | Austenitic stainless steel for hydrogen generator excellent in scale peeling resistance |
| CN101705437A (en) * | 2009-11-28 | 2010-05-12 | 山西太钢不锈钢股份有限公司 | Heat-resistant stainless steel with high-lasting strength and manufacturing method thereof |
-
2011
- 2011-11-16 CN CN2011103638561A patent/CN102383050A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11279714A (en) * | 1998-03-31 | 1999-10-12 | Nippon Steel Corp | Austenitic stainless steel for hydrogen generator excellent in scale peeling resistance |
| CN101705437A (en) * | 2009-11-28 | 2010-05-12 | 山西太钢不锈钢股份有限公司 | Heat-resistant stainless steel with high-lasting strength and manufacturing method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888568A (en) * | 2012-09-14 | 2013-01-23 | 攀钢集团江油长城特殊钢有限公司 | Austenite nickel-saving and heat-resisting steel plate and manufacturing method thereof |
| CN103397276A (en) * | 2013-08-12 | 2013-11-20 | 钢铁研究总院 | High-strength nickel-saving air valve steel and preparation method thereof |
| CN103397276B (en) * | 2013-08-12 | 2015-08-26 | 钢铁研究总院 | A kind of high strength nickel-saving type Valve Steel and preparation method thereof |
| CN104148555A (en) * | 2014-06-30 | 2014-11-19 | 贵州安大航空锻造有限责任公司 | Forge forming method for 1Cr14Mn14Ni stainless steel ring part |
| CN109576580A (en) * | 2018-11-29 | 2019-04-05 | 武汉华培动力科技有限公司 | Diesel engine pressure booster with variable cross section nozzle assembly heat resisting steel and smelting process |
| CN113549820A (en) * | 2021-06-29 | 2021-10-26 | 鞍钢股份有限公司 | High-carbon low-ferrite-content austenitic stainless steel plate and production method thereof |
| CN116043132A (en) * | 2021-10-28 | 2023-05-02 | 江苏新华合金有限公司 | 314 heat-resistant steel wire and preparation method thereof |
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Application publication date: 20120321 |