CN101054653A - Process for producing heat-proof non-stick steel - Google Patents
Process for producing heat-proof non-stick steel Download PDFInfo
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- CN101054653A CN101054653A CN 200610039784 CN200610039784A CN101054653A CN 101054653 A CN101054653 A CN 101054653A CN 200610039784 CN200610039784 CN 200610039784 CN 200610039784 A CN200610039784 A CN 200610039784A CN 101054653 A CN101054653 A CN 101054653A
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Abstract
A method for production of heat resisting non-stick steel which has the material quality of 3Cr28Ni10W2NbRe and is composed of C of 0.30-0.4%, W of 1.4-2.0%, Nb of 0.5-1.0% and Re of trace quantity, and other chemical constituents, wherein 1Cr18Ni9Ti non-corrodible steel of 60% is selected as base material, comprising chromium irons of 30% and nickle plate, tungsten plate and niobium plate alloy of 10% respectively. The smelting is performed in an intermediate frequency electric furnace at a smelting temperature of 1600-1650 DEG C, by adopting a non-oxidation process, with a tap off temperature of 1550-1580 DEG C. The addition of W, Nb, Re and Ta alloy elements in accordance with the present invention greatly improves mechanical performances and elevated temperature properties of the material. By adjusting the contents of carbon, chromium and nickle of the steel, the swelling coefficient is depressed to exhibit effects of non-stick steel, and then the service life is remarkably prolonged.
Description
Technical field: the production method that the present invention relates to a kind of heat-proof non-stick steel.It is applicable to the high-temperature machinery product and the accessory of industries such as production metallurgy, electric power, oil, chemical industry and national defense industry.
Technical background: both production and marketing thrive in continuous 6 years for China's weldless steel tube industry, reached 2,123 ten thousand tons to China's output of steel tube in 2004, accounts for global output of steel tube 25%, and weldless steel tube and welded tube output are the first in the world.China's steel pipe industry technology transformation and investment record high.China has about 130 families of man of seamless steel tubing mill at present, and nearly 200 cover units have been contained various units in the world today.Part equipment has reached world lead level, and the seamless steel tube production enterprise of two megaton occurred, has striden into global big steel pipe group industry.Though the Cr25Ni20 that uses at present tradition high temperature steel has high-temperature oxidation resistance preferably, can not solve the problem of high temperature non-stick steel, has perplexed the development of pipe mill for this reason always.Particularly the production difficult problem of stainless steel seamless pipe is bigger.Develop a kind of heat-proof non-stick steel novel material according to the technical feature of the practical situation of steel mill's seamless steel tube production and various pipe fittings for this reason and solve this technical barrier, with dwindle as early as possible tube product on kind, quality, cost with the gap of international most advanced level, production equipment and Technology are reached advanced world standards, make China really become the production Strong state of world's steel pipe.
Summary of the invention: purpose of the present invention is exactly the production method that a kind of heat-proof non-stick steel will be provided, it can solve the problem of present Cr25Ni20 tradition high temperature steel high temperature steel bonding well, the object of the present invention is achieved like this, a kind of production method of heat-proof non-stick steel, material is 3Cr28Ni10W2NbRe, its Chemical Composition is by C, 0.30-0.4%, Cr, 26.0-29.0%, Ni, 8.0-11.0%, W, 1.4-2.0%, Nb, 0.5-1.0%, Si≤1.0%, Mn≤1.0%, S, P≤0.030%, the Re trace is formed; Batching selects for use the 1Cr18Ni9Ti stainless steel to account for 60% as bed material, prepare the medium carbon ferrochrome alloy again and account for 30%, prepare nickel plate, tungsten plate, niobium plate alloy at last and account for 10%, carry out tight accurate calculation (all counting by weight percentage), and carry out process control allotment chemical analysis, to reach the chemical ingredients requirement; Melting is to carry out in middle frequency furnace, adopts non-oxidizing process, by the stokehold accurate dosing, and the composition of calculation control steel; Smelting temperature is 1600-1650 ℃, and tapping temperature is 1550-1580 ℃; Gating system must be controlled enough feeding amounts, reduces casting flaw as far as possible; Moulding must guarantee molding sand Strong degree, controls free air delivery well; Want strict control thermal treatment process, guarantee quality product.
The technology of the present invention performance index;
High-temperature oxidation resistance: 1100-1200 ℃;
Normal temperature mechanical property: tensile strength b=750-800Mpa, yield strength 0.2=500-600Mpa;
Casting: adopt sand mold casting or precision casting.Dry type and coating process are adopted in sand mold casting.Control sand bond and free air delivery well.
Thermal treatment process: anneal 800-900 ℃, stove is cold; Solution treatment 1100-1150 ℃, the chamber is cold; Tempering 400-500 ℃, the chamber is cold.
The technological process of production: foundry goods annealing → mechanical roughing → solution treatment → tempering precision work → check → product export.
The present invention mainly adopts domestic more superior alloy element resource, as Cr, W, Nb, Re alloy, and used Nb, the Ta alloy has significantly improved comprehensive mechanical performance, and has improved processing performance.Selected the lower cost materials design simultaneously as far as possible for use, reduced manufacturing cost, made product really reach the condition of " inexpensive ", thereby won market.The present invention is owing to added the mechanical property, particularly high-temperature behavior that W, Nb, Re Ta alloying element have increased substantially this material.Both guarantee higher tensile strength, wear resistance, also improved heat resistanceheat resistant degree and oxidation-resistance.Simultaneously owing to adjusted the carbon content of steel and contained chromium, nickel amount, thereby reduced the coefficient of expansion, played the effect of non-stick steel, thus significant prolongation product work-ing life.Confirm that through practice comparable 4Cr25Ni20Si2 product made from steel improves 2-3 times of work-ing life under square one and condition.Simultaneously owing to adopted the lower cost materials design, reduced arm and a leg iron and steel, vanadium iron element and replaced with tungsten, niobium, reduced manufacturing cost significantly for this reason, reduce cost 1/3 than Cr25Ni20 material, and result of use is than 2 times of Cr25Ni20 improves.In in a big way, win market like this, improved competitiveness of product.Can be widely used in each big seamless steel tubing mill and general pipe mill, produce weldless steel tube, welded tube, the particularly high alloy steel pipe of various materials, the production technique of stainless seamless tube, and will produce flexible tubing for China's test, contour difficult to govern of expansion sleeve breaks a new path.
Embodiment: a kind of production method of heat-proof non-stick steel, material are 3Cr28Ni10W2NbRe, and its Chemical Composition is by C, 0.35%, Cr, 27.5%, Ni, 9.5%, W, 1.7%, Nb, 0.75%, Si≤1.0%, Mn≤1.0%, S, P≤0.030%, the Re trace is formed; Batching selects for use the 1Cr18Ni9Ti stainless steel to account for 60% as bed material, prepare the medium carbon ferrochrome alloy again and account for 30%, prepare nickel plate 3.3%, tungsten plate 3.3%, niobium plate alloy 3.3% at last, carry out tight accurate calculation, and carry out process control allotment chemical analysis, to reach the chemical ingredients requirement; Melting is to carry out in middle frequency furnace, adopts non-oxidizing process, by the stokehold accurate dosing, and the composition of calculation control steel; Smelting temperature is 1600-1650 ℃, and tapping temperature is 1550-1580 ℃; Gating system must be controlled enough feeding amounts, reduces casting flaw as far as possible; Sand mold casting is adopted in casting, and dry type is adopted in sand mold casting, controls sand bond and free air delivery well; The heat-treatment of annealing temperature is controlled at 850 ℃, and stove is cold; 1125 ℃ of solution treatment, the chamber is cold; 450 ℃ of tempering, the chamber is cold.Want strict control thermal treatment process, guarantee quality product, after check, dispatch from the factory.
Claims (1)
1. the production method of a heat-proof non-stick steel, material is 3Cr28Ni10W2NbRe, its Chemical Composition is by C, 0.35%, Cr, 27.5%, Ni, 9.5%, W, 1.7%, Nb, 0.75%, Si≤1.0%, Mn≤1.0%, S, P≤0.030%, the Re trace is formed; Batching selects for use the 1Cr18Ni9Ti stainless steel to account for 60% as bed material, prepare the medium carbon ferrochrome alloy again and account for 30%, prepare nickel plate 3.3%, tungsten plate 3.3%, niobium plate alloy 3.3% at last, carry out tight accurate calculation, and carry out process control allotment chemical analysis, to reach the chemical ingredients requirement; Melting is to carry out in middle frequency furnace, adopts non-oxidizing process, by the stokehold accurate dosing, and the composition of calculation control steel; Smelting temperature is 1600-1650 ℃, and tapping temperature is 1550-1580 ℃; Gating system must be controlled enough feeding amounts, reduces casting flaw as far as possible; Sand mold casting is adopted in casting, and dry type is adopted in sand mold casting, controls sand bond and free air delivery well; The heat-treatment of annealing temperature is controlled at 850 ℃, and stove is cold; 1125 ℃ of solution treatment, the chamber is cold; 450 ℃ of tempering, the chamber is cold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200610039784 CN101054653A (en) | 2006-04-14 | 2006-04-14 | Process for producing heat-proof non-stick steel |
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| CN 200610039784 CN101054653A (en) | 2006-04-14 | 2006-04-14 | Process for producing heat-proof non-stick steel |
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| CN101054653A true CN101054653A (en) | 2007-10-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560635B (en) * | 2009-05-26 | 2011-01-05 | 无锡烨隆精密机械有限公司 | Technical method for producing heat-resisting alloy steel casting below 1100 DEG C |
| CN102873279A (en) * | 2012-09-29 | 2013-01-16 | 西峡县众德汽车部件有限公司 | Method for producing heat-resistant steel automobile exhaust pipes by iron mold sand lining process |
| CN104264059A (en) * | 2014-10-18 | 2015-01-07 | 无棣向上机械设计服务有限公司 | Novel heat resisting steel and preparation method thereof |
| CN104493072A (en) * | 2014-11-26 | 2015-04-08 | 马鞍山市恒达耐磨材料有限责任公司 | Molding sand for heat-resistant steel members and preparation method thereof |
-
2006
- 2006-04-14 CN CN 200610039784 patent/CN101054653A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560635B (en) * | 2009-05-26 | 2011-01-05 | 无锡烨隆精密机械有限公司 | Technical method for producing heat-resisting alloy steel casting below 1100 DEG C |
| CN102873279A (en) * | 2012-09-29 | 2013-01-16 | 西峡县众德汽车部件有限公司 | Method for producing heat-resistant steel automobile exhaust pipes by iron mold sand lining process |
| CN102873279B (en) * | 2012-09-29 | 2015-06-10 | 西峡县众德汽车部件有限公司 | Method for producing heat-resistant steel automobile exhaust pipes by iron mold sand lining process |
| CN104264059A (en) * | 2014-10-18 | 2015-01-07 | 无棣向上机械设计服务有限公司 | Novel heat resisting steel and preparation method thereof |
| CN104493072A (en) * | 2014-11-26 | 2015-04-08 | 马鞍山市恒达耐磨材料有限责任公司 | Molding sand for heat-resistant steel members and preparation method thereof |
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