CN103725965B - Center bearing in metal alloy and solder type bogie - Google Patents
Center bearing in metal alloy and solder type bogie Download PDFInfo
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- CN103725965B CN103725965B CN201410043591.0A CN201410043591A CN103725965B CN 103725965 B CN103725965 B CN 103725965B CN 201410043591 A CN201410043591 A CN 201410043591A CN 103725965 B CN103725965 B CN 103725965B
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- 229910001092 metal group alloy Inorganic materials 0.000 title claims abstract description 69
- 229910000679 solder Inorganic materials 0.000 title claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000011572 manganese Substances 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 21
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 20
- 239000010703 silicon Substances 0.000 claims abstract description 19
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 19
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004411 aluminium Substances 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011651 chromium Substances 0.000 claims abstract description 18
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 18
- 239000011574 phosphorus Substances 0.000 claims abstract description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000005864 Sulphur Substances 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 abstract description 57
- 239000010959 steel Substances 0.000 abstract description 57
- 239000000463 material Substances 0.000 abstract description 27
- 238000005266 casting Methods 0.000 abstract description 18
- 238000012797 qualification Methods 0.000 abstract description 12
- 238000005096 rolling process Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 16
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 14
- 235000011941 Tilia x europaea Nutrition 0.000 description 14
- 239000004571 lime Substances 0.000 description 14
- 239000002893 slag Substances 0.000 description 13
- 238000002844 melting Methods 0.000 description 12
- 230000008018 melting Effects 0.000 description 12
- 230000003647 oxidation Effects 0.000 description 12
- 238000007254 oxidation reaction Methods 0.000 description 12
- 239000000126 substance Substances 0.000 description 10
- 230000009467 reduction Effects 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 6
- 238000010079 rubber tapping Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 5
- 241001062472 Stokellia anisodon Species 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 229910000616 Ferromanganese Inorganic materials 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000010436 fluorite Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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- Rolling Contact Bearings (AREA)
Abstract
The invention provides a kind of metal alloy, comprise following component: the carbon of 0.18wt% ~ 0.25wt%; The silicon of 0.26wt% ~ 0.50wt%; The manganese of 0.79wt% ~ 1.00wt%; The chromium of 0.14wt% ~ 0.25wt%; The aluminium of 0.02wt% ~ 0.06wt%; The phosphorus of≤0.035wt%; The sulphur of≤0.035wt%; The copper of≤0.30wt%; Surplus is iron.In metal alloy provided by the invention, the content of each component meets the requirement of UIC840-2 " steel casting supply of material technical qualification used for rolling stock ", and has good yield strength and tensile strength.Experimental result shows, metal alloy provided by the invention has good yield strength, tensile strength, elongation and ballistic work, concrete, and the yield strength of metal alloy provided by the invention can reach 405MPa, tensile strength can reach 575MPa.
Description
Technical field
The present invention relates to field of metal alloy technology, particularly relate to the center bearing in a kind of metal alloy and solder type bogie.
Background technology
Y25Lsd1 solder type bogie is the principal mode bogie of Europe lorry, primarily of two curb girders, crossbeam, center bearing, and the compositions such as side bearing, side bearing body, two end carriages, longitudinal beam, spring lid and drawing strickle guide.A wherein component center bearing, needs to adopt the mode of casting to produce.In prior art, the material mark of casting center bearing is E300-520MS (C2), its chemical composition and mechanical property need meet the requirement of UIC840-2 " steel casting supply of material technical qualification used for rolling stock ", see table 1 and table 2, table 1 is the mass content of the chemical composition that UIC840-2 " steel casting supply of material technical qualification used for rolling stock " specifies, table 2 is the mechanical property parameters that UIC840-2 " steel casting supply of material technical qualification used for rolling stock " specifies;
The mass content (%) of the chemical composition that table 1UIC840-2 " steel casting supply of material technical qualification used for rolling stock " specifies
| The trade mark | C | Si | Mn | Cr | Ni | Mo | P | S |
| E300-520MS(C2) | ≤0.25 | ≤0.50 | ≤1.0 | ≤0.25 | ≤0.35 | ≤0.10 | ≤0.04 | ≤0.04 |
The mechanical property parameters that table 2UIC840-2 " steel casting supply of material technical qualification used for rolling stock " specifies
| The trade mark | Yield strength/MPa | Tensile strength/MPa | Elongation | Ballistic work+20 DEG C/AKv |
| E300-520MS(C2) | ≥300 | ≥520 | 17% | ≥20J |
The mode of production that in the existing bogie of China, center bearing component is main is the technique of moulding-coremaking-smelting-cast-cleaning.The trade mark for the material of center bearing component is ZG230-450.The trade mark is that the mass content of the chemical composition of ZG230-450 material and mechanical property parameters are in table 3 and table 4, table 3 is that in prior art, the trade mark is the mass content of the chemical composition of the material of ZG230-450, and table 4 is that in prior art, the trade mark is the mechanical property parameters of the material of ZG230-450;
In table 3 prior art, the trade mark is the mass content (%) of the chemical composition of the material of ZG230-450
In table 4 prior art, the trade mark is the mechanical property parameters of the material of ZG230-450
| The trade mark | Yield strength/MPa | Tensile strength/MPa | Elongation | Ballistic work+20 DEG C/AKv |
| ZG230-450 | ≥230MPa | ≥450MPa | 22% | ≥25J |
As can be seen from Table 1, the trade mark that prior art adopts is the regulation that the chemical constitution of the material of ZG230-450 does not meet UIC840-2, and tensile strength and yield strength are lower than the requirement of mechanical property in UIC840-2.Material composition and mechanical property all do not meet the requirement of UIC840-2 " steel casting supply of material technical qualification used for rolling stock ".
Summary of the invention
The object of the present invention is to provide the center bearing in a kind of metal alloy and solder type bogie, metal alloy provided by the invention has good mechanical property, and meets the demand of batch production.
The invention provides a kind of metal alloy, comprise following component:
The carbon of 0.18wt% ~ 0.25wt%;
The silicon of 0.26wt% ~ 0.50wt%;
The manganese of 0.79wt% ~ 1.00wt%;
The chromium of 0.14wt% ~ 0.25wt%;
The aluminium of 0.02wt% ~ 0.06wt%;
The phosphorus of≤0.035wt%;
The sulphur of≤0.035wt%;
The copper of≤0.30wt%;
Surplus is iron.
Preferably, the carbon of 0.20wt% ~ 0.25wt% is comprised.
Preferably, the silicon of 0.30wt% ~ 0.45wt% is comprised.
Preferably, the manganese of 0.85wt% ~ 1.0wt% is comprised.
Preferably, the chromium of 0.16wt% ~ 0.23wt% is comprised.
Preferably ,≤the phosphorus of 0.030wt% is comprised;
Preferably ,≤the sulphur of 0.030wt% is comprised.
Preferably, the aluminium of 0.02wt% ~ 0.04wt% is comprised.
The invention provides the center bearing in solder type bogie, described center bearing is cast by the metal alloy described in technique scheme and is formed.
Preferably, be cast into described in:
Poured into a mould by the model of fused solution to described center bearing comprising described metal alloy composition, obtain described center bearing, the temperature of described cast is 1560 DEG C ~ 1580 DEG C.
The invention provides a kind of metal alloy, comprise following component: the carbon of 0.18wt% ~ 0.25wt%; The silicon of 0.26wt% ~ 0.50wt%; The manganese of 0.79wt% ~ 1.00wt%; The chromium of 0.14wt% ~ 0.25wt%; The aluminium of 0.02wt% ~ 0.06wt%; The phosphorus of≤0.035wt%; The sulphur of≤0.035wt%; The copper of≤0.30wt%; Surplus is iron.Alloying element in metal alloy provided by the invention is based on carbon, manganese and silicon, and the content of each component meets the requirement of UIC840-2 " steel casting supply of material technical qualification used for rolling stock ", and has good yield strength and tensile strength.Experimental result shows, metal alloy provided by the invention has good yield strength, tensile strength, elongation and ballistic work, concrete, and the yield strength of metal alloy provided by the invention can reach 405MPa, tensile strength can reach 575MPa.
Embodiment
The invention provides a kind of metal alloy, comprise following component:
The carbon of 0.18wt% ~ 0.25wt%;
The silicon of 0.26wt% ~ 0.50wt%;
The manganese of 0.79wt% ~ 1.00wt%;
The chromium of 0.14wt% ~ 0.25wt%;
The aluminium of 0.02wt% ~ 0.06wt%;
The phosphorus of≤0.035wt%;
The sulphur of≤0.035wt%;
The copper of≤0.30wt%;
Surplus is iron.
The content of each component of metal alloy provided by the invention and mechanical property meet the requirement of UIC840-2 " steel casting supply of material technical qualification used for rolling stock " completely, and are suitable for producing in enormous quantities.
Metal alloy provided by the invention comprises the carbon of 0.18wt% ~ 0.25wt%, be preferably the carbon of 0.20wt% ~ 0.25wt%, in an embodiment of the present invention, the mass content of described carbon in described metal alloy can be specially 0.20wt%, 0.21wt%, 0.22wt%, 0.23wt%, 0.24wt% or 0.25wt%.
Metal alloy provided by the invention comprises the silicon of 0.26wt% ~ 0.50wt%, is preferably the silicon of 0.30wt% ~ 0.45wt%wt%.In an embodiment of the present invention, the mass content of described silicon in described metal alloy can be specially 0.30wt%, 0.31wt%, 0.32wt%, 0.33wt%, 0.34wt%, 0.35wt%, 0.36wt%, 0.39wt%, 0.41wt%, 0.44wt% or 0.45wt%.
Metal alloy provided by the invention comprises the manganese of 0.79wt% ~ 1.00wt%, is preferably the manganese of 0.85wt% ~ 1.0wt%, more preferably comprises the manganese of 0.90wt% ~ 0.99wt%.In an embodiment of the present invention, the mass content of described manganese in described metal alloy can be specially 0.85wt%, 0.90wt%, 0.91wt%, 0.92wt%, 0.95wt%, 0.96wt%, 0.98wt% or 0.99wt%.
Metal alloy provided by the invention comprises the aluminium of 0.02wt% ~ 0.06wt%, is preferably the aluminium of 0.02wt% ~ 0.05wt%.In an embodiment of the present invention, the mass content of described aluminium in described metal alloy can be specially 0.02wt%, 0.03wt%, 0.04wt%, 0.05wt% or 0.06wt%.
Metal alloy provided by the invention comprises the chromium of 0.14wt% ~ 0.25wt%, is preferably the chromium of 0.16wt% ~ 0.23wt%.In an embodiment of the present invention, the mass content of described chromium in described metal alloy can be specially 0.16wt%, 0.19wt%, 0.20wt%, 0.21wt%, 0.22wt% or 0.23wt%.
Metal alloy provided by the invention comprises≤phosphorus of 0.035wt%; In the present invention, concrete, the mass content of described phosphorus preferably≤0.030wt%, more preferably≤0.025wt%;
Metal alloy provided by the invention comprises≤sulphur of 0.035wt%, in the present invention, concrete, the mass content of described sulphur preferably≤0.030wt%, be more preferably≤0.025wt%, most preferably≤0.020wt%.
Metal alloy provided by the invention comprises≤copper of 0.30wt%, in the present invention, copper is due to after various furnace charge thawing, bring in molten steel, not artificial interpolation, copper is inevitable impurity, and those skilled in the art can contain quantitative limitation according to above-mentioned to copper mass, select the furnace charge of suitable purity.
In the present invention, described metal alloy also comprises the iron of surplus.
The preparation method of the present invention to described metal alloy does not have special restriction, the method adopting metal alloy well known to those skilled in the art to smelt is prepared, as oxidation style well known to those skilled in the art can be adopted to smelt, obtain the metal alloy described in technique scheme.In an embodiment of the present invention, the preparation method of described metal alloy can be specially:
By source of iron and lime mixed melting, obtain molten steel;
Described molten steel is mixed with lime and ore, is oxidized in oxygen atmosphere, obtain the molten steel be oxidized;
The molten steel of described oxidation is mixed with silicon source, manganese source, chromium source, aluminium source and reductive agent, reduces, obtain the metal alloy described in technique scheme.
In the industrial production, the present invention before by source of iron and lime mixed melting, preferably carries out fettling, repairs, the position that body of heater damages to ensure the normal smelting of lower one heat steel.The method of the present invention to described fettling does not have special restriction, adopts the technical scheme of fettling well known to those skilled in the art.
Source of iron and lime preferably add in the burner hearth after fettling by the present invention, are energized to melting material, obtain molten steel.In the process of described fusing, the phosphorus in material is partially removed, thus ensures the content of phosphorus in the metal alloy obtained.In the present invention, the quality optimization of described lime is the 2wt% ~ 7wt% of described source of iron total mass, is more preferably 3wt% ~ 6wt%.In the present invention, in order to accelerate the fusing of material and save power consumption, in the industrial production, the present invention preferably adopts oxygen blast to flux in described melting process, improves the speed of described fusing and the quality of molten steel.The present invention in described melting process, the steel mouth of shutoff smelting furnace.In the present invention, the voltage of described energising is preferably 140V ~ 150V, and the electric current of described energising is preferably 4000A.
After obtaining molten steel, described molten steel mixes with lime and ore by the present invention, is oxidized in oxygen atmosphere, obtains the molten steel be oxidized.In the present invention, the phosphorus content in molten steel can be reduced in described oxidising process to greatest extent, and remove the gas in molten steel, as nitrogen and/or hydrogen and inclusion, described oxidising process by the heating temperatures of molten steel to a little higher than tapping temperature.In the present invention, the add-on of described ore is preferably often criticized and is no more than the heavy 1wt% of material; The add-on of described lime is preferably as the criterion to be paved with molten steel liquid level, and described ore is preferably with Fe2o3 and Fe3o4 as main mixture.In the present invention, the temperature of described oxidation is preferably not less than 1560 DEG C.
The present invention, after completing described oxidising process, has a power failure, removes the oxidation sludge in stove, and make new slag with lime and fluorite, prepares to reduce.In the present invention, described reduction process can remove the sulphur content in steel, deoxidation, and adjusts chemical composition and the temperature of molten steel.The kind of the present invention to described carbon source, silicon source, manganese source, chromium source, aluminium source does not have special restriction, adopt carbon source well known to those skilled in the art, silicon source, manganese source, chromium source, aluminium source, as carbon dust, ferrosilicon powder, ferromanganese, ferrosilicon, ferrochrome, ferroaluminium can be adopted.The condition of the present invention to described reduction does not have special restriction, adopt the technical scheme of reducing in steelmaking process well known to those skilled in the art, in the present invention, reduce when molten steel component meets and skims and require, and described molten steel temperature equals or a little higher than tapping temperature, the present invention does not have special restriction to this.
In Industrial processes, the preparation method of described metal alloy can be specially:
(1) fettling: fettling refers to after upper stove has been tapped, needs to repair, the position that body of heater damages to ensure the normal smelting of lower one heat steel rapidly;
(2) feed: charging refers to and loaded in burner hearth by solid charge (scrap iron and steel material allocated into by the requirement of smelting steel grade and a small amount of lime).Employing body of heater is outputed, and is once added in burner hearth by furnace charge with crane batch can of slinging;
(3) melting period: be called melting period to the stage that furnace charge is all melting down from energising.Its main task melts whole furnace charge rapidly, and require the phosphorus removing part.In order to accelerate the fusing of furnace charge and save power consumption, oxygen blast is generally adopted to flux in melting period.In addition, block up good tap hole simultaneously;
(4) oxidation period: when furnace charge whole melting down after sampling analysis enter oxidation period.The task in this stage is: 1) reduce the phosphorus content in molten steel to greatest extent; 2) gas (nitrogen, hydrogen) and inclusion in steel is removed; 3) molten steel temperature is heated to a little higher than tapping temperature.For completing above-mentioned task, lime, ore must be added in stove, carrying out the item operation such as oxygen blast, stream slag.At the end of oxidation period, slag be pulled down;
(5) reduction period: have a power failure after removing oxidation sludge, make new slag with lime, fluorite, start to enter reduction period.The main task of reduction period is: 1) remove the sulphur content in steel; 2) deoxidation; 3) molten steel chemical composition and temperature is adjusted.To evenly add carbon dust, ferrosilicon powder to slag face during reduction period operation in batches, manage to make slag color bleach and keep white slag, and the iron alloy adding ferromanganese, ferrosilicon and smelt required for steel grade in molten bath.In order to final deoxidation, also will to molten steel interpolation aluminium block;
(6) tap: tapping refers to smelts satisfactory molten steel, from tap hole impouring steel teeming ladle by process.Then the cast of alloy is carried out.
The invention provides the center bearing in solder type bogie, described center bearing is cast by the metal alloy described in technique scheme and is formed.
The method of the present invention to described casting does not have special restriction, adopts the technical scheme that center bearing well known to those skilled in the art is cast.In the present invention, described casting is preferably specially:
Poured into a mould by the model of fused solution to described center bearing comprising described metal alloy composition, obtain described center bearing, the temperature of described cast is 1560 DEG C ~ 1580 DEG C.
The present invention preferably carries out moulding according to the parameter of required center bearing, obtain the model of center bearing, the method of the present invention to described moulding does not have special restriction, adopt the technical scheme of moulding well known to those skilled in the art, as ester hardened sodium silicate sand mo(u)lding line can be adopted, in the present invention, the time of described moulding was preferably more than 4 hours.
After completing described moulding, the model precursor obtained is carried out mould assembling by the present invention, obtains the model of center bearing.The method of the present invention to described mould assembling does not have special restriction, adopts the technical scheme of mould assembling well known to those skilled in the art, and in the present invention, the time of described mould assembling was preferably more than 4 hours.
After obtaining the model of described center bearing, the model of fused solution to described center bearing comprising described metal alloy composition is poured into a mould by the present invention, obtains center bearing, and the temperature of described cast is preferably 1560 DEG C ~ 1580 DEG C.The molten steel meeting alloy compositions that method described in technique scheme preferably obtains by the present invention is poured into a mould described center bearing model.
After completing described cast, the present invention clears up after preferably the cast obtained being left standstill and being no less than 6 hours, obtains center bearing.The method of the present invention to described cleaning does not have special restriction, adopts the technical scheme of cleaning well known to those skilled in the art, as ramming head formula shot-blast apparatus can be adopted cast cleaning.
Metal alloy provided by the invention not only can be used for casting the center bearing in described solder type bogie, can also be used to cast the casting with described center bearing with the parts of similar mechanical property.The method of described casting is consistent with the castmethod of center bearing described in technique scheme, does not repeat them here.
The invention provides a kind of metal alloy, comprise following component: the carbon of 0.18wt% ~ 0.25wt%; The silicon of 0.26wt% ~ 0.50wt%; The manganese of 0.79wt% ~ 1.00wt%; The chromium of 0.14wt% ~ 0.25wt%; The aluminium of 0.02wt% ~ 0.06wt%; The phosphorus of≤0.035wt%; The sulphur of≤0.035wt%; The copper of≤0.30wt%; Surplus is iron.Alloying element in metal alloy provided by the invention is based on carbon, manganese and silicon, and the content of each component meets the requirement of UIC840-2 " steel casting supply of material technical qualification used for rolling stock ", and has good yield strength and tensile strength.Experimental result shows, metal alloy provided by the invention has good yield strength, tensile strength, elongation and ballistic work, concrete, and the yield strength of metal alloy provided by the invention can reach 405MPa, tensile strength can reach 575MPa.
In order to further illustrate the present invention, below in conjunction with embodiment, metal alloy provided by the invention is described in detail, but they can not be interpreted as limiting the scope of the present invention.
Embodiment 1 ~ 6
According to the component concentration shown in table 5, proportioning is carried out to source of iron, carbon source, silicon source, manganese source, chromium source, aluminium source, prepare metal alloy according to following flow process.
(1) fettling: after upper stove has been tapped, needs to repair, the position that body of heater damages to ensure the normal smelting of lower one heat steel rapidly;
(2) feed: solid charge (scrap iron and steel material allocated into by the requirement of smelting steel grade and a small amount of lime) is loaded in burner hearth.Employing body of heater is outputed, and is once added in burner hearth by furnace charge with crane batch can of slinging;
(3) melting period: be energized to furnace charge all melting down.Its main task melts whole furnace charge rapidly, and require the phosphorus removing part.In order to accelerate the fusing of furnace charge and save power consumption, oxygen blast is generally adopted to flux in melting period.In addition, block up good tap hole simultaneously;
(4) oxidation period: when furnace charge whole melting down after sampling analysis enter oxidation period.The task in this stage is: 1) reduce the phosphorus content in molten steel to greatest extent; 2) gas (nitrogen, hydrogen) and inclusion in steel is removed; 3) molten steel temperature is heated to a little higher than tapping temperature.For completing above-mentioned task, lime, ore must be added in stove, carrying out the item operation such as oxygen blast, stream slag.At the end of oxidation period, slag be pulled down;
(5) reduction period: have a power failure after removing oxidation sludge, make new slag with lime, fluorite, start to enter reduction period.The main task of reduction period is: 1) remove the sulphur content in steel; 2) deoxidation; 3) molten steel chemical composition and temperature is adjusted.To evenly add carbon dust, ferrosilicon powder to slag face during reduction period operation in batches, manage to make slag color bleach and keep white slag, and the iron alloy adding ferromanganese, ferrosilicon and smelt required for steel grade in molten bath.In order to final deoxidation, also will to molten steel interpolation aluminium block;
(6) tap: tapping refers to smelts satisfactory molten steel, from tap hole impouring steel teeming ladle by process.Then carry out the cast of alloy, obtain center bearing.
The component concentration of the metal alloy that table 5 embodiment of the present invention 1 ~ 6 obtains
| Embodiment | C | Si | Mn | Cr | Al | P | S | Cu | Fe |
| 1 | 0.25 | 0.36 | 0.99 | 0.19 | 0.02 | 0.023 | 0.023 | 0.12 | Surplus |
| 2 | 0.22 | 0.33 | 0.91 | 0.21 | 0.03 | 0.019 | 0.014 | 0.16 | Surplus |
| 3 | 0.22 | 0.39 | 0.90 | 0.20 | 0.04 | 0.019 | 0.021 | 0.14 | Surplus |
| 4 | 0.23 | 0.41 | 0.92 | 0.23 | 0.03 | 0.017 | 0.015 | 0.08 | Surplus |
| 5 | 0.21 | 0.42 | 0.96 | 0.21 | 0.04 | 0.022 | 0.016 | 0.10 | Surplus |
| 6 | 0.23 | 0.44 | 0.95 | 0.20 | 0.03 | 0.017 | 0.018 | 0.07 | Surplus |
The mechanical property of the present invention to the metal alloy obtained is tested, and result is as shown in table 6, and table 6 is the mechanical experimental results of the metal alloy that the embodiment of the present invention 1 ~ 6 obtains.
The mechanical experimental results of the metal alloy that table 6 embodiment of the present invention 1 ~ 6 obtains
As can be seen from Table 6, metal alloy provided by the invention has good mechanical property, meets the regulation about mechanical property in UIC840-2 " steel casting supply of material technical qualification used for rolling stock " completely.
The invention provides a kind of metal alloy, comprise following component: the carbon of 0.18wt% ~ 0.25wt%; The silicon of 0.26wt% ~ 0.50wt%; The manganese of 0.79wt% ~ 1.00wt%; The chromium of 0.14wt% ~ 0.25wt%; The aluminium of 0.02wt% ~ 0.06wt%; The phosphorus of≤0.035wt%; The sulphur of≤0.035wt%; The copper of≤0.30wt%; Surplus is iron.Alloying element in metal alloy provided by the invention is based on carbon, manganese and silicon, and the content of each component meets the requirement of UIC840-2 " steel casting supply of material technical qualification used for rolling stock ", and has good yield strength and tensile strength.Experimental result shows, metal alloy provided by the invention has good yield strength, tensile strength, elongation and ballistic work, concrete, and the yield strength of metal alloy provided by the invention can reach 405MPa, tensile strength can reach 575MPa.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. be used as a metal alloy for the center bearing in solder type bogie, comprise following component:
The carbon of 0.18wt% ~ 0.25wt%;
The silicon of 0.26wt% ~ 0.50wt%;
The manganese of 0.79wt% ~ 1.00wt%;
The chromium of 0.14wt% ~ 0.25wt%;
The aluminium of 0.02wt% ~ 0.06wt%;
The phosphorus of≤0.035wt%;
The sulphur of≤0.035wt%;
The copper of≤0.30wt%;
Surplus is iron.
2. metal alloy according to claim 1, is characterized in that, comprises the carbon of 0.20wt% ~ 0.25wt%.
3. metal alloy according to claim 1, is characterized in that, comprises the silicon of 0.30wt% ~ 0.45wt%.
4. metal alloy according to claim 1, is characterized in that, comprises the manganese of 0.85wt% ~ 1.0wt%.
5. metal alloy according to claim 1, is characterized in that, comprises the chromium of 0.16wt% ~ 0.23wt%.
6. metal alloy according to claim 1, is characterized in that, comprises≤the phosphorus of 0.030wt%.
7. metal alloy according to claim 1, is characterized in that, comprises≤the sulphur of 0.030wt%.
8. metal alloy according to claim 1, is characterized in that, comprises the aluminium of 0.02wt% ~ 0.04wt%.
9. the center bearing in solder type bogie, is characterized in that, described center bearing is cast by the metal alloy described in claim 1 ~ 8 any one and formed.
10. center bearing according to claim 9, is characterized in that, described in be cast into:
Poured into a mould by the model of fused solution to described center bearing comprising described metal alloy composition, obtain described center bearing, the temperature of described cast is 1560 DEG C ~ 1580 DEG C.
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Address after: 161002 Qigihar City, Heilongjiang province Tiefeng District Plant Road No. 36 Patentee after: CRRC QIQIHAR ROLLING STOCK Co.,Ltd. Address before: 161002 Qigihar City, Heilongjiang province Tiefeng District Plant Road No. 36 Patentee before: QIQIHAR RAILWAY ROLLING STOCK Co.,Ltd. |
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