CN1259444C - Anti nitriding in high temperature, wearable and heat-resistant alloy material - Google Patents
Anti nitriding in high temperature, wearable and heat-resistant alloy material Download PDFInfo
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- CN1259444C CN1259444C CN 200410029749 CN200410029749A CN1259444C CN 1259444 C CN1259444 C CN 1259444C CN 200410029749 CN200410029749 CN 200410029749 CN 200410029749 A CN200410029749 A CN 200410029749A CN 1259444 C CN1259444 C CN 1259444C
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Abstract
The present invention belongs to the technical field of manufacturing alloy steel, and relates to an alloy material which has nitridation resistance, wear resistance and heat resistance and is suitable for use at high temperature. The specific chemical compositions of the alloy material are: 0.30 to 0.45 % of C, not higher than 1.50 % of Si, 1.0 to 2.0 % of Mn, 16.0 to 20.0 % of Cr, 23 to 27 % of Ni, 3.0 to 5.0 % of Mo, 0.50 to 2.0 % of Al, 0.02 to 0.10 % of RE and the balance of Fe. Compared with the prior art, the alloy material has the advantages of high intensity, hith wear resistance and good nitridation resistance at high temperature. The one-time service life of the alloy material used as a hearth roll of a normalizing furnace in a metallurgic plant is longer than one and a half years. Compared with the HK40 alloy in the prior art, the one-time service life of the alloy material is increased by more than one time.
Description
Affiliated field
The invention belongs to the manufacturing field of steel alloy.Be more suitable for preparing and at high temperature use the antiwear heat resisting alloy material that anti-nitrogenize ability is arranged.
Background technology
In each Metallurgical Factory, use the normalizing and the tempering heat treatment of steel plate at present always, general use temperature is about under the high temperature about 1000 ℃, in order to prevent steel plate oxidation at high temperature, when heat-treating, generally adopt, make the nitrogen pressure of keeping set amount in the stove prevent that the oxidation of steel plate from taking place to furnace injection nitrogen.In the prior art, the normalizing furnace bottom-roller of each Metallurgical Factory generally is to adopt refractory alloy cast steel material preparations such as 4Cr25Ni20Si2 (HK40), 3Cr24Ni7SiNRE.The main drawback of such Heat resisting cast steel material, be be filled with carry out life-time service under the hot conditions of nitrogen after, because high-temperature ammonolysis makes the furnace bottom roll surface dross, pit, scar etc. occur, body of roll distortion occurs owing to the hot strength of material reduces, consequently directly have influence on by the processing quality and the result of products such as heat-treated steel plate.Therefore, the use result of contrast material from above-mentioned prior art (adopts the furnace bottom roll of HK40 alloy preparation, also do not reach half life cycle of an overhaul its work-ing life) can find out that the alloy material of prior art can't satisfy the service requirements of producer at present.
Goal of the invention and content
The objective of the invention is to propose a kind of composition simplicity of design, rationally, the anti-nitrogenize of high temperature, abrasion resistance properties is good and improve the product anti-nitrogenize antiwear heat resisting of the high temperature alloy material in work-ing life.
According to the anti-nitrogenize antiwear heat resisting of the high temperature that the object of the invention proposed alloy material, its concrete technical solution be still adopt with iron be the base, and according to weak point of the prior art and to nickel, chromium, molybdenum, aluminium, principal element such as manganese and rare earth has been done necessary qualification and suitable adjustment, therefore the concrete chemical component weight % by the anti-nitrogenize antiwear heat resisting of high temperature proposed by the invention alloy material is: C0.30-0.45%, Si 0.06-1.07%, Mn 1.0-2.0%, Cr 16.0-20.0%, Ni 23-27%, Mo 3.0-5.0%, Al 0.50-2.0%, RE 0.02-0.10%, all the other are Fe.
We are when the anti-nitrogenize antiwear heat resisting of design high temperature of the present invention alloy material composition, mainly be the product of considering this material when in severe environment, using, owing to can not satisfying service requirements, the performance of product material cause shorten the work-ing life of product, therefore under our designed material is inscribed, the requirement in work-ing life that improves material product should be arranged also before possessing better comprehensive performance.Therefore we add the carbon of set amount in the composition that proposes this alloy, mainly be for improving the wear resistance of this alloy, consider also simultaneously that elements such as C and Mo, Cr, Mn are when forming fine and close eutectic carbides, in the high temperature use, also can form uniform proeutectoid carbide, these proeutectoid carbides can be distributed in the alloy substrate in disperse, because carbide itself has higher hardness, make alloy material in the certain hardening effect of maintenance, also can the wear resistance of material be improved.When adding Ni, Cr, Mo, except that a spot of formation carbide is arranged, and most carbon is the matrix that dissolves in alloy in addition, can make matrix obtain solution strengthening like this and at high temperature have higher high temperature strength with the assurance alloy.
In alloying constituent of the present invention, reduced Cr content (comparing), can reduce or prevent that the product of this material from using like this under nitriding atmosphere with Heat resisting cast steel such as prior art HK40, the separating out of chromium nitride and carbon chromium nitride in the material, the antagonism nitrogenize is favourable.For the antioxidant effect that does not reduce alloy adds about 1% Al, can form like this and compare Cr
2O
3More stable Al
2O
3The oxide film structure has significantly improved the antioxidant property of alloy material.
In design of alloy of the present invention, consider the adding of manganese and silicon, it is the antioxidant property that can improve alloy, but manganese also possesses the effect that the stable austenite matrix is arranged, but the decline of Mn, Si too high meeting causing alloy high-temp intensity, therefore in this alloying constituent Mn content should to be controlled at 1.0-2.0% more suitable.Si content should be controlled at below 1.5%, Si 0.06-1.07%.In addition in this alloying constituent, rare earth element (RE) adds in the alloy, except play the desoxydatoin, the more important thing is the nodularization that is beneficial to inclusion in smelting process, can improve the hot strength and the oxidation-resistance of this alloy, but content should not too highly should be controlled at 0.02-0.10%.Iron in alloying constituent of the present invention is the fundamental element that forms matrix, and iron and a certain amount of nickel form stable austenitic matrix, guarantee that alloy possesses higher high temperature strength and wear resistance.
The preparation of the anti-nitrogenize antiwear heat resisting of high temperature of the present invention alloy material is similar to the preparation of prior art material, this alloy material is behind electrosmelting, can become pipe or other foundry goods according to the shape of product direct pouring that the planner requires, after treating product foundry goods demoulding polishing, be machined to the finished product of furnace bottom roll or other antiwear heat resisting foundry goods again.
Adopt the anti-nitrogenize antiwear heat resisting of high temperature of the present invention alloy compared with prior art; alloy of the present invention has following advantage: higher intensity and wear resistance are arranged; the anti-nitrogenize performance of good high temperature is arranged; a work-ing life be enhanced about more than once than of the prior art HK40 alloy greater than a year and a half a work-ing life that is used as Metallurgical Factory's normalizing furnace bottom-roller.
Specific embodiments
Our embodiment adopts the contrast experiment who carries out in alloy composition scope of the present invention, experiment is the smelting of carrying out in non-vacuum induction furnace, experiment has prepared 4 stoves alloy of the present invention and 1 stove comparative alloy (the embodiment alloy composition sees Table 1) altogether, experimental technique is identical with art methods, the experiment material therefor is to adopt Si, Mn smelting the later stage adding with Si-Fe, Mn-Fe form, Al and RE directly insert in the molten steel before tapping, and tapping temperature is 1600 ℃.Preparation process is to adopt the horizontal type centrifugal-casting method directly to cast pipe; Treat to be prepared into the finished product furnace bottom roll through machining again after the pipe cleaning, the furnace bottom roll of making can be directly used in and carry out the life-span examination in the nitrogen protection normalizing furnace heat-treatment production line.In order to contrast conveniently, we also carry out the test of hot strength simultaneously to alloy material, and the mechanical property of embodiment alloy and the comparative result in work-ing life see Table 2.Comparing result by embodiment can be seen, the high temperature tensile strength of alloy of the present invention is higher than HK40 cast steel commonly used, use 18 months rear surfaces still very smooth as furnace bottom roll, find no dross, pit, cut and body of roll metamorphism, the anti-nitrogenize and the wear resistance of this explanation material of the present invention obviously are better than compared steel, and also exceed more than one times than HK40 casting roller its work-ing life.Sequence number 1-4 in following contrast table is an alloy of the present invention, and sequence number 5 is a comparative alloy.
The chemical ingredients contrast of table 1 embodiment of the invention alloy and prior art alloy, weight %
| Heat (batch) number | C | Si | Mn | Cr | Ni | Mo | Al | RE | Fe |
| 1 | 0.38 | 1.07 | 1.71 | 17.89 | 25.20 | 3.90 | 1.52 | 0.03 | Surplus |
| 2 | 0.36 | 0.98 | 1.65 | 18.26 | 25.10 | 3.92 | 1.48 | 0.04 | Surplus |
| 3 | 0.37 | 1.05 | 1.68 | 18.13 | 24.98 | 3.86 | 1.56 | 0.03 | Surplus |
| 4 | 0.38 | 0.06 | 1.72 | 17.79 | 25.12 | 4.01 | 1.72 | 0.04 | Surplus |
| 5 | 0.39 | 1.65 | 1.73 | 25.08 | 20.13 | 0.12 | 0.08 | 0.01 | Surplus |
The high temperature tensile properties and the work-ing life of table 2 embodiment of the invention alloy prior art alloy
| Heat (batch) number | 900 ℃ of stretchings | The life-span examination | |||||
| σ b MPa | σ 0.2 MPa | δ 5 ％ | ψ ％ | Purposes | Specification mm | The moon in work-ing life | |
| 1 | 179 | 128 | 17 | 31 | Furnace bottom roll | φ320 | ＞18 |
| 2 | 181 | 132 | 28 | 41 | Furnace bottom roll | φ320 | ＞18 |
| 3 | 191 | 131 | 24 | 35 | Furnace bottom roll | φ320 | ＞18 |
| 4 | 188 | 134 | 29 | 36 | Furnace bottom roll | φ320 | ＞18 |
| 5 | 162 | 118 | 26 | 35 | Furnace bottom roll | φ320 | 8 |
Claims (1)
1, the anti-nitrogenize antiwear heat resisting of a kind of high temperature alloy material, the concrete chemical component weight % that it is characterized in that this alloy material is: C 0.30-0.45%, Si 0.06-1.07%, Mn 1.0-2.0%, Cr16.0-20.0%, Ni 23-27%, Mo 3.0-5.0%, Al 0.50-2.0%, RE 0.02-0.10%, all the other are Fe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410029749 CN1259444C (en) | 2004-03-26 | 2004-03-26 | Anti nitriding in high temperature, wearable and heat-resistant alloy material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410029749 CN1259444C (en) | 2004-03-26 | 2004-03-26 | Anti nitriding in high temperature, wearable and heat-resistant alloy material |
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| CN1563469A CN1563469A (en) | 2005-01-12 |
| CN1259444C true CN1259444C (en) | 2006-06-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100434559C (en) * | 2005-12-02 | 2008-11-19 | 重庆仪表材料研究所 | High-temperature alloy for temperature-measuring thermocouple protection tube of rotary cement kiln |
| CN103572178B (en) * | 2012-08-07 | 2016-03-23 | 上海华培动力科技有限公司 | A kind of high temperaturesteel and preparation method thereof |
| CN107447170A (en) * | 2017-06-28 | 2017-12-08 | 宁波乾豪金属制品有限公司 | A kind of high-strength wearproof corrosion-resistant stainless steel and preparation method thereof |
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Owner name: GAUNA BEIJING INSTITUTE OF TECHNOLOGY CO. Free format text: FORMER OWNER: IRON AND STEEL RESEARCH GEUERAL INST. Effective date: 20080523 |
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Effective date of registration: 20080523 Address after: Beijing City, Haidian District Daliushu Village No. 19 Patentee after: BEIJING CISRI-GAONA MATERILALS & TECHNOLOGY Co., LTD. Address before: No. 76, South College Road, Beijing, Haidian District Patentee before: Central Iron & Steel Research Institute |
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Granted publication date: 20060614 Termination date: 20110326 |