CN101717889B - High manganese steel frog comprising nano atomic group and manufacturing method thereof - Google Patents
High manganese steel frog comprising nano atomic group and manufacturing method thereof Download PDFInfo
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- CN101717889B CN101717889B CN200910227859A CN200910227859A CN101717889B CN 101717889 B CN101717889 B CN 101717889B CN 200910227859 A CN200910227859 A CN 200910227859A CN 200910227859 A CN200910227859 A CN 200910227859A CN 101717889 B CN101717889 B CN 101717889B
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Abstract
The invention relates to a high manganese steel frog comprising a nano atomic group, which comprises the following chemical components by weight percent: 0.9 to 1.2 percent of C, 11.0 to 14.0 percent of Mn, 0.1 to 0.4 percent of V, 0.05 to 0.2 percent of Zr, 0.04 to 0.2 percent of N, 0.1 to 0.3 percent of Al, less than 0.8 percent of Si, less than 0.035 percent of S, less than 0.035 percent of P, and the balance of Fe. A manufacturing method of the high manganese frog mainly comprises the following steps: adding industrial pure iron, nitrided ferrovanadium, ferromanganese, industrial pure aluminium and industrial pure zirconium into an electric furnace; heating and keeping the temperature between 1630 DEG C and 1680 DEG C for 10 to 20 minutes, wherein a tapping temperature is between 1550DEG C and 1600 DEG C and a pouring temperature is between 1450 DEG C and 1500 DEG C; performing water quenching after heating the castings to 1050 DEG C-1100 DEG C and keeping the temperature for 1 to 3 hours; and then performing air cooling after heating to 290 DEG C-310 DEG C and keeping the temperature for 3 to 5 hours to obtain an austenite structure of the nano atomic group which has a regional diameter from a plurality of nanometers to dozens of nanometers and has a structure of -C(N)0Me-N(C)-Me-. The work hardening capacity of the product of the invention is increased by over 30% than that of the common high manganese austenite steel. When in use, the working surface of the frog can rapidly reach higher hardness so that the frog has excellent wear-resisting property. The service life of the high manganese steel frog is improved by over 50% compared with that of the common ZGMn13 steel.
Description
Technical field the present invention relates to a kind of ferrous materials and method of manufacture thereof, particularly special-purpose high mangaenese steel of railroad frog and method of manufacture thereof.
Background technology is since the invention Hadfield Steel; People are not interrupted its research always; Thereby derive a large amount of Austenitic Manganese Steels of alloying again, like a kind of Austenitic manganese steel casting that utilizes Ni, V, Ti microalloying of U.S.'s invention, its each item mechanical property all reaches higher level; The railroad frog that utilizes this high mangaenese steel to make, be significantly improved its work-ing life.Owing to contain the very thin carboritride of a kind of grain-size in this steel, make prolong 20-70% the work-ing life of this foundry goods than common high mangaenese steel.The composition of this Austenitic Manganese Steel is that the add-on of (wt%): Mn11.0-24.0, C 1.0-1.4, Si>=1, Cr>=1.9, Ni>=0.25, Mo>=1.0, Al>=0.2, Cu>=0.25, impurity P≤0.07, S≤0.06, microalloy Ti, Nb, V is about 0.020～0.070 respectively, and N is approximately 0.001-0.01.And the summation of microalloying Ti+Nb+V+N element is not less than 0.05%, is no more than 0.22%.Canada has carried out high mangaenese steel has been carried out the V research work of Alloying Treatment again, and through in high mangaenese steel, adding the V of different content, V is to the High Manganese Steel Frog Effect on Performance in research.They select two kinds of thermal treatment process for use, and the first is heated to 1100 ℃ of austenitizings and is cooled to 950 ℃ of insulations 6 hours then, solution treatment more at last, and it two is to be heated to 1050～1150 ℃ of normal solution treatment.Discover, which kind of treatment process no matter, the hardness of high mangaenese steel all increases along with increasing of V content, and wear resisting property V content be 2% o'clock be optimum value, its wear resisting property can reach 5 times of common high mangaenese steel.
China has also carried out adding vanadium Alloying Treatment again to railroad frog with high mangaenese steel; Be on the basis of former high mangaenese steel composition; Add V, Ti etc. and carry out Alloying Treatment again; The purpose that adds trace alloying element V and Ti is for refine austenite crystal grain, improves the intensity of high mangaenese steel, thereby improves the use properties of High Manganese Steel Frog.
About being that the high mangaenese steel of alloy element also has some research reports with the zirconium, mainly be some patents of the FSU, their composition series is respectively, FeCrMnNbZrC system, its thermal treatment process is 930～1000 ℃ of quenchings.FeMnAlNSiZrC system, this steel has high shock-resistant polishing machine, and good fluidity, and (having deleted one) mechanical property reaches σ
b: 920MPa, σ
0.2: 510MPa, δ: φ 55%: 48%.FeMnNSiTiZrC system, this steel mechanical property and resistance to cleavage are good.FeCrMnCuVZrC system, this steel has high toughness and wear resisting property.
From all are seen about documents at present; Utilize V or N or Zr to the high mangaenese steel achievement in research of Alloying Treatment again although have; They can make High Manganese Steel Frog in a certain respect performance increase, but all can not well adapt to present high speed, the abominable service condition of heavy haul railway.
Summary of the invention the object of the present invention is to provide that a kind of railway frog work hardening capacity is high, wear resistance is good, the high manganese steel frog comprising nano atomic group and the method for manufacture thereof of long service life.The present invention utilizes vanadium, zirconium and nitrogen that High Manganese Steel Frog is carried out microalloying to handle, and then, railway frog is heated between 280 ℃～350 ℃ a certain temperature carries out temper, makes it to obtain containing the nano atomic group of vanadium, zirconium, nitrogen, manganese and carbon etc.
Its chemical ingredients of high manganese steel frog comprising nano atomic group of the present invention is wt%:C 0.9～1.2, Mn11.0～14.0, V 0.1～0.4, Zr 0.05～0.2, N 0.04～0.2, Al 0.1～0.3, Si＜0.8, S＜0.035, P＜0.035, all the other are Fe.
The method of manufacture of high manganese steel frog comprising nano atomic group of the present invention is following:
(1) reinforced: in electric furnace, add alloy and raw metals such as technically pure iron, ferrovanadium nitride, ferromanganese, commercial-purity aluminium, industrial pure zirconium, the sequencing that preferably adds is followed successively by: technically pure iron, ferrovanadium nitride, ferromanganese, commercial-purity aluminium, industrial pure zirconium;
(2) smelt: smelt by common Hadfield Steel smelting process, promptly metal and alloy in the process furnace make it whole fusings, and in 1630～1680 ℃ of temperature maintenance 10～20min, tapping temperature are 1550～1600 ℃;
(3) cast: teeming temperature is 1450～1500 ℃, pours into needed product;
(4) thermal treatment of cast steel: with above-mentioned foundry goods be heated to 1050～1100 ℃ the insulation 1～3h after shrend, obtain single-phase austenite structure.Carrying out low-temperaturetempering then handles; Promptly be heated to air cooling behind 290～310 ℃ of insulation 3～5h, obtain the special austenite structure of ten minutes that regional diameter is of a size of nano atomic group several to dozens of nanometers, that be-C (N)-Me-N (C)-Me-structure and be product of the present invention.
The present invention compared with prior art has following advantage: of the present invention contain vanadium, zirconium and nitrogen austenitic high mangaenese steel and handle through low-temperaturetempering after; Its wear resisting property can improve more than 50%; Its reason is because after the Austenitic Manganese Steel process low-temperaturetempering, nitrogen wherein, carbon atom and vanadium, zirconium atom are to assembling the nano atomic group of formation-C (N)-Me-N (C)-Me-structure together; But also do not form carbide; Belong to the early stage that forms carbide, this nano atomic group can effectively improve the work hardening capacity of high mangaenese steel, and improves more than 30% than common high mangaenese steel; Because the existence of nano atomic group, High Manganese Steel Frog in use workplace top layer reaches higher hardness very soon, and therefore, showing good wear resistance can; Improve 50% or more than common ZGMn13 steel railway frog the work-ing life of this High Manganese Steel Frog, and its production cost only increases by 1～2%.
Embodiment
Embodiment 1
At first technically pure iron, ferrovanadium nitride, ferromanganese, commercial-purity aluminium and industrial pure zirconium are added in 2 tons of induction furnaces according to this sequencing successively; Metal and alloy in the process furnace; Make it whole fusings, and in 1670 ℃ of temperature maintenance 12min, tapping temperature is 1550 ℃; Teeming temperature is 1470 ℃, pour into be of a size of 150 * 200 * 500mm steel embryo several; With above-mentioned foundry goods be heated to 1080 ℃ the insulation 1.5h after shrend, obtain single-phase austenite structure.Air cooling behind reheat to the 290 ℃ insulation 5h; Obtain containing the austenite structure of nanoscale-C (N)-Me-N (C)-Me-atomic group; Be product of the present invention, its chemical ingredients is wt%:C1.1, Mn 11.1, V 0.14, N 0.048, Al 0.23, Zr 0.08, Si 0.54, S 0.025, P 0.025, all the other are Fe.50mm place sampling and testing under cast(ing) surface, its mechanical property is: σ
b=845MPa, σ
0.2=429MPa, δ
5=37%, a
KU=211J/cm
2, HB265.
Embodiment 2
At first technically pure iron, ferrovanadium nitride, ferromanganese, commercial-purity aluminium and industrial pure zirconium are added in 5 tons of electric arc furnace according to this sequencing successively; Metal and alloy in the process furnace; Make it whole fusings, and in 1640 ℃ of temperature maintenance 18min, tapping temperature is 1590 ℃; Teeming temperature is 1490 ℃, and pouring into model is 3 of 60kg/m fusion cast frogs; With above-mentioned railway frog be heated to 1100 ℃ the insulation 3h after shrend; Obtain single-phase austenite structure, reheat to 310 ℃ insulation air cooling after 3 hours obtains containing the austenite structure of nanoscale-C (N)-Me-N (C)-Me-atomic group; Be product of the present invention; Its chemical ingredients is wt%:C 0.95, Mn 13.6, V0.36, N 0.12, Al 0.21, Zr 0.18, Si 0.67, S 0.025, P 0.021, all the other are Fe, 50mm place sampling and testing under cast(ing) surface, and its mechanical property is: σ
b=871MPa, σ
0.2=433MPa, δ
5=35%, a
KU=201J/cm
2, HB268.The actual upper track of railway frog uses, and be 2.4 hundred million tons mean life (overload quantity), than improving more than 50% the work-ing life (overload quantity is 1.5 hundred million tons) of common High Manganese Steel Frog.
Claims (2)
1. the method for manufacture of a high manganese steel frog comprising nano atomic group; The chemical ingredients of this high manganese steel frog comprising nano atomic group is wt%:C 0.9～1.2, Mn 11.0～14.0, V 0.1～0.4, Zr 0.05～0.2, N 0.04～0.2, Al 0.1～0.3, Si 0.45～0.8, S＜0.035, P＜0.035, all the other are Fe, it is characterized in that:
(1) in electric furnace, adds technically pure iron, ferrovanadium nitride, ferromanganese, commercial-purity aluminium, industrial pure zirconium raw metal;
(2) raw metal in the process furnace make it whole fusings, and in 1630～1680 ℃ of temperature maintenance 10～20min, tapping temperature is 1550～1600 ℃;
(3) teeming temperature is 1450～1500 ℃, pours into needed product;
(4) with above-mentioned foundry goods be heated to 1050～1100 ℃ the insulation 1～3h after shrend, be heated to then 290～310 ℃ the insulation 3～5h after air cooling.
2. the method for manufacture of high manganese steel frog comprising nano atomic group according to claim 1 is characterized in that: the sequencing that raw metal adds is followed successively by: technically pure iron, ferrovanadium nitride, ferromanganese, commercial-purity aluminium, industrial pure zirconium.
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| CN101717889B true CN101717889B (en) | 2012-10-24 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101892427B (en) * | 2010-06-21 | 2012-06-06 | 桃江县正茂福利铸造有限公司 | High manganese steel and manufacturing method |
| CN105671432B (en) * | 2016-02-04 | 2017-09-22 | 燕山大学 | The explosion hardening processing method of nitrogenous potassium steel high-speed overload railroad frog |
| AU2018412622A1 (en) | 2018-03-29 | 2019-10-17 | Nippon Steel Corporation | Austenitic wear-resistant steel plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451777A (en) * | 2003-05-09 | 2003-10-29 | 燕山大学 | Nitrogen-contg. austenite Mn-Cr steel specially adapted for frog of railway |
| RU2295587C1 (en) * | 2005-07-04 | 2007-03-20 | Открытое акционерное общество "Новокузнецкий металлургический комбинат" | Rail steel |
| JP2007291418A (en) * | 2006-04-21 | 2007-11-08 | Nippon Steel Corp | Method of manufacturing pearlitic rail excellent in toughness |
| CN101074469A (en) * | 2007-06-12 | 2007-11-21 | 燕山大学 | Forged (rolled) abrasive austenic permanganic steel and its manufacture |
-
2009
- 2009-12-24 CN CN200910227859A patent/CN101717889B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451777A (en) * | 2003-05-09 | 2003-10-29 | 燕山大学 | Nitrogen-contg. austenite Mn-Cr steel specially adapted for frog of railway |
| RU2295587C1 (en) * | 2005-07-04 | 2007-03-20 | Открытое акционерное общество "Новокузнецкий металлургический комбинат" | Rail steel |
| JP2007291418A (en) * | 2006-04-21 | 2007-11-08 | Nippon Steel Corp | Method of manufacturing pearlitic rail excellent in toughness |
| CN101074469A (en) * | 2007-06-12 | 2007-11-21 | 燕山大学 | Forged (rolled) abrasive austenic permanganic steel and its manufacture |
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