CN103556067B - Rail vehicle bolster side frame foundry goods steel and preparation method thereof - Google Patents
Rail vehicle bolster side frame foundry goods steel and preparation method thereof Download PDFInfo
- Publication number
- CN103556067B CN103556067B CN201310507708.1A CN201310507708A CN103556067B CN 103556067 B CN103556067 B CN 103556067B CN 201310507708 A CN201310507708 A CN 201310507708A CN 103556067 B CN103556067 B CN 103556067B
- Authority
- CN
- China
- Prior art keywords
- steel
- foundry goods
- side frame
- refining
- rare earth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of rail vehicle bolster side frame foundry goods steel and preparation method thereof, the chemical composition of described foundry goods steel is by weight percentage: C:0.23 ~ 0.29%, Si:0.30 ~ 0.50%, Mn:0.80 ~ 1.00%, P≤0.030%, S≤0.030%, Cu≤0.30%, Ni:0.20 ~ 0.50%, Cr:0.30 ~ 0.40%, Al:0.020 ~ 0.050%, rare earth≤0.10%, and surplus is Fe and inevitable impurity.First raw material corresponding to C, P, S, Cu and Ni adds in eccentric-bottom electric arc furnace and is fused into molten steel by the method, controls carbon content >=0.50% in molten steel; Carry out oxidation and decarbonization with oxygen, tap when liquid steel temperature >=1630 DEG C, when tapping is to refining bag, adds refining slag, lime, reductor, manganeseirom, ferro-silicon and ferrochrome in ladle per ton, then carry out liquid steel refining; After pouring cast part, foundry goods is sent into collection and put chain type heat-treatment lines and carry out normalizing, obtain the foundry goods steel preparing bolster side frame.The present invention has purification steel, improves as-cast structure, reduces component segregation, in steel, carries out microalloying and the metamorphism to inclusion.
Description
Technical field
The present invention relates to a kind of preparation method of steel-making, refer to a kind of rail vehicle bolster side frame foundry goods steel and preparation method thereof particularly.
Background technology
Steel bolster side frame is the vitals of rail truck running part-bogie, and it belongs to key stressed member, and all wts of compartment and goods is delivered to axletree by them.Heavy-Haul Railway speed-raising and vehicle upgrading, have higher requirement to the quality of cast steel truck bolster, side frame.
At present, the alloying element scope of existing melting technology is comparatively large, easily causes the impact on foundry goods metallographic structure.Heat treatment time is longer simultaneously, causes energy consumption larger.Further, the mixed crystal phenomenon that there will be during steel casting, affects the grain fineness number of bolster side frame, thus affects bolster side frame quality.
Summary of the invention
Technical problem to be solved by this invention is just to provide a kind of rail vehicle bolster side frame foundry goods steel and preparation method thereof, and the foundry goods steel obtained by its preparation method can eliminate mixed crystal phenomenon.
For solving the problems of the technologies described above, a kind of rail vehicle bolster side frame foundry goods steel provided by the invention, the chemical composition of described foundry goods steel is by weight percentage: C:0.23 ~ 0.29%, Si:0.30 ~ 0.50%, Mn:0.80 ~ 1.00%, P≤0.030%, S≤0.030%, Cu≤0.30%, Ni:0.20 ~ 0.50%, Cr:0.30 ~ 0.40%, Al:0.020 ~ 0.050%, rare earth≤0.10%, surplus is Fe and inevitable impurity, wherein, La≤30%, Ce≤70% in described rare earth.
Further, the chemical composition of described foundry goods steel is by weight percentage: C:0.23 ~ 0.29%, Si:0.30 ~ 0.50%, Mn:0.80 ~ 1.00%, P≤0.030%, S≤0.030%, Cu≤0.30%, Ni:0.30 ~ 0.50%, Cr:0.31 ~ 0.40%, Al:0.021 ~ 0.050%, rare earth≤0.10%, and surplus is Fe and inevitable impurity.
The invention provides a kind of rail vehicle bolster side frame foundry goods steel and preparation method thereof, it is characterized in that: comprise the following steps:
1) take by above-mentioned weight percent: the raw material that C, Si, Mn, P, S, Cu, Ni, Cr, Al, rare earth are corresponding, for subsequent use;
2) raw material corresponding to C, P, S, Cu and Ni is added in eccentric-bottom electric arc furnace be fused into molten steel, by the carburelant adding 7 ~ 9kg in molten steel per ton, control carbon content >=0.50% in molten steel;
3) oxidation and decarbonization is carried out with oxygen, wherein, decarburized amount >=0.30%, oxidation P≤0.015% in latter stage;
4) when only seething with excitement during carbon content≤0.08% in steel;
5) tap when liquid steel temperature >=1630 DEG C; When tapping is to refining bag, add the refining slag of 0.5 ~ 2.5kg, the lime of 15 ~ 25kg, the Si-Al-Ba-Ca complex deoxidizer of 1 ~ 2kg, 8 ~ 10kg manganeseirom, 4.5 ~ 6Kg ferro-silicon and 5 ~ 6Kg ferrochrome in ladle per ton, then carry out liquid steel refining.Sampling analysis chemical composition in refining process, and add alloy according to analytical results, adjust each composition to specification requirement.
6), after refining terminates, in the molten steel of tapping per ton, the rare earth silicon cored-wire of the aluminum steel of 0.5 ~ 2kg, the silicon-calcium wire of 0.5 ~ 2kg and 0.5 ~ 3kg is added
7) after pouring cast part, foundry goods is sent into collection and put chain type heat-treatment lines and carry out normalizing, foundry goods is directly warmed up to 900 ~ 920 DEG C after entering stove, insulation 2.5 ~ 3.5h, quenching of then coming out of the stove.Finally obtain the foundry goods steel preparing bolster side frame.
Preferably, the pressure range of described oxygen is 3 ~ 6MPa.
Beneficial effect of the present invention is:
1, the present invention adds rare earth has following advantage to cast steel:
1) steel are purified.Deoxidation, desulfurization; Eliminate or reduce the damaging effect of micro-low melting point element; Purification crystal boundary, suppresses grain-boundary weakness.
2) to the metamorphism of inclusion.Add rare earth and can control the composition of the inclusion such as sulphur, oxygen in cast steel, form and distribution, play inclusion modification effect.
3) as-cast structure is improved.Crystal grain thinning; Change tissue and form.
4) component segregation is reduced.
5) in steel, microalloying is carried out.
2, Cr can reduce territory, austenite phase field, the limit of solubility of carbon in the concentration of carbon in perlite and austenite is reduced, perlitic range is expanded, easily forms pearlite colony.
3, the casting crystalline grain degree forming bulk pearlite colony (i.e. mixed crystal) does not reach requirement, must another warm process.Eliminate mixed crystal and can avoid another warm process, reduce production cost.
Accompanying drawing explanation
The normalizing process curve of Fig. 1 foundry goods steel of the present invention preparation process.
Embodiment
In order to explain the present invention better, illustrate main contents of the present invention further below in conjunction with specific embodiment, but content of the present invention is not only confined to following examples.
A kind of foundry goods steel preparing bolster side frame, the chemical composition of described foundry goods steel is by weight percentage: C:0.23 ~ 0.29%, Si:0.30 ~ 0.50%, Mn:0.80 ~ 1.00%, P≤0.030%, S≤0.030%, Cu≤0.30%, Ni:0.20 ~ 0.50%, Cr:0.30 ~ 0.40%, Al:0.020 ~ 0.050%, rare earth≤0.10%, surplus is Fe, wherein, La≤30%, Ce≤70% in described rare earth.
Prepare the method for foundry goods steel, comprise the following steps:
1) take by above-mentioned weight percent: the raw material that C, Si, Mn, P, S, Cu, Ni, Cr, Al, rare earth are corresponding, for subsequent use;
2) raw material corresponding to C, P, S, Cu and Ni is added in eccentric-bottom electric arc furnace be fused into molten steel, by the carburelant adding 7 ~ 9kg in molten steel per ton, control carbon content >=0.50% in molten steel;
3) oxidation and decarbonization is carried out by with oxygen, wherein, decarburized amount >=0.30%, oxidation P≤0.015% in latter stage, the pressure range of oxygen is 3 ~ 6MPa;
4) when only seething with excitement during carbon content≤0.08% in steel;
5) tap when liquid steel temperature >=1630 DEG C; When tapping is to refining bag, adds the ferrochrome of the refining slag of 0.5 ~ 2.5kg, the lime of 15 ~ 25kg, the Si-Al-Ba-Ca of 1 ~ 2kg, the manganeseirom of 8 ~ 10kg, the ferro-silicon of 4.5 ~ 6kg and 5 ~ 6kg in ladle per ton, then carry out liquid steel refining;
6), after refining terminates, in the molten steel of tapping per ton, the rare earth silicon cored-wire of the aluminum steel of 0.5 ~ 2kg, the silicon-calcium wire of 0.5 ~ 2kg and 0.5 ~ 3kg is added
7) after pouring cast part, foundry goods is sent into collection and put chain type heat-treatment lines and carry out normalizing, foundry goods is directly warmed up to 900 ~ 920 DEG C after entering stove, insulation 2.5 ~ 3.5h, quenching of then coming out of the stove.Finally obtain the foundry goods steel preparing bolster side frame.
The proportioning of the chemical composition of foundry goods steel
Table 1
Wherein, La≤30%, Ce≤70% in rare earth.Foundry goods steel is prepared according to above-mentioned foundry goods steel proportioning associative list 2.
Table 2
| Temperature (DEG C) | Soaking time (h) | |
| Embodiment 1 | 900 | 2.5 |
| Embodiment 2 | 910 | 3.0 |
| Embodiment 3 | 920 | 2.5 |
| Embodiment 4 | 910 | 2.8 |
| Embodiment 5 | 910 | 2.5 |
| Embodiment 6 | 915 | 3.5 |
Claims (1)
1. the rail vehicle bolster side frame preparation method of foundry goods steel, the chemical composition of described foundry goods steel is by weight percentage: C:0.25%, Si:0.50%, Mn:0.96%, P:0.025%, S:0.023%, Cu:0.24%, Ni:0.30%, Cr:0.33%, Al:0.045%, rare earth element: 0.088%, surplus is Fe and inevitable impurity, wherein, La≤30%, Ce≤70% in described rare earth element; It is characterized in that: comprise the following steps:
1) take by above-mentioned weight percent: the raw material that C, Si, Mn, P, S, Cu, Ni, Cr, Al, rare earth element are corresponding, for subsequent use;
2) raw material corresponding to C, P, S, Cu and Ni is added in eccentric-bottom electric arc furnace be fused into molten steel, by the carburelant adding 7 ~ 9kg in molten steel per ton, control carbon content >=0.50% in molten steel;
3) oxidation and decarbonization is carried out with oxygen, wherein, decarburized amount >=0.30%, oxidation P≤0.015% in latter stage, wherein, the pressure range of oxygen is 3 ~ 6MPa;
4) when only seething with excitement during carbon content≤0.08% in steel;
5) tap when liquid steel temperature >=1630 DEG C, when tapping is to refining bag, add the ferrochrome of the refining slag of 0.5 ~ 2.5kg, the lime of 15 ~ 25kg, the Si-Al-Ba-Ca of 1 ~ 2kg, the manganeseirom of 8 ~ 10kg, the ferro-silicon of 4.5 ~ 6kg and 5 ~ 6kg in ladle per ton, then carry out liquid steel refining;
6), after refining terminates, in the molten steel of tapping per ton, the rare earth silicon cored-wire of the aluminum steel of 0.5 ~ 2kg, the silicon-calcium wire of 0.5 ~ 2kg and 0.5 ~ 3kg is added;
7) after pouring cast part, foundry goods is sent into collection and put chain type heat-treatment lines and carry out normalizing, foundry goods is directly warmed up to 910 DEG C after entering stove, insulation 3h, quenching of then coming out of the stove; Finally obtain the foundry goods steel preparing bolster side frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310507708.1A CN103556067B (en) | 2013-10-25 | 2013-10-25 | Rail vehicle bolster side frame foundry goods steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310507708.1A CN103556067B (en) | 2013-10-25 | 2013-10-25 | Rail vehicle bolster side frame foundry goods steel and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103556067A CN103556067A (en) | 2014-02-05 |
| CN103556067B true CN103556067B (en) | 2016-04-27 |
Family
ID=50010410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310507708.1A Active CN103556067B (en) | 2013-10-25 | 2013-10-25 | Rail vehicle bolster side frame foundry goods steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103556067B (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000044955A1 (en) * | 1999-01-28 | 2000-08-03 | Buckeye Steel Castings Company | Cast steel composition for railway components |
-
2013
- 2013-10-25 CN CN201310507708.1A patent/CN103556067B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 提高铁路货车转向架铸钢ZG25MnCrNi强韧性研究;孙立赢;《大连交通大学硕士论文》;20101231;第4，7-9，12-13页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103556067A (en) | 2014-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103266287B (en) | Carbon ferritic in one-pearlite type non-hardened and tempered steel and manufacture method thereof | |
| CN108220766B (en) | Cr-V hot work die steel and preparation method thereof | |
| CN103320713B (en) | High-strength weathering resistant steel and its preparation method | |
| CN108893681B (en) | High-strength high-toughness pressure vessel steel plate and preparation method thereof | |
| CN102719759B (en) | Elastic bar steel for high-speed rail fastener and smelting production method thereof | |
| CN111286670B (en) | Medium-carbon non-quenched and tempered steel and preparation process thereof, and connecting rod and preparation process thereof | |
| CN105925899B (en) | A kind of quenched and tempered state X52 hydrogen sulfide corrosion resistant seamless line pipes and preparation method thereof | |
| CN102719749B (en) | Steel for railway axle and production process for steel | |
| CN110029268B (en) | 09MnNiDR steel plate for low-temperature pressure vessel with core low-temperature toughness protection and manufacturing method thereof | |
| CN110629114A (en) | Low-cost high-strength high-toughness bridge steel and preparation method thereof | |
| CN114182173B (en) | Production method of non-quenched and tempered steel for engine crankshaft | |
| CN109182904A (en) | A kind of armored concrete fire resisting reinforcing bar and preparation method thereof | |
| CN109735765B (en) | Large-sized, ultra-fine grain, high-strength and high-toughness spring steel and production method thereof | |
| CN108660377A (en) | The preparation method of seamless steel pipe and seamless steel pipe | |
| CN106591703A (en) | Steel plate for pressure vessel with yield strength being 345 MPa stage and production method | |
| CN105838988B (en) | The steel of axle of motor train unit containing niobium and its heat treatment process | |
| CN103469066B (en) | A kind of utilize plate mill to produce high-mouldability energy steel plate method and obtained steel plate | |
| CN102108468A (en) | Steel for railway locomotive axles and manufacturing method thereof | |
| CN102978532B (en) | Steel for axle of railway and manufacture method thereof | |
| CN109023055A (en) | A kind of high intensity high formability autobody sheet and its production technology | |
| CN105177408A (en) | Low-cost hot-rolled thin strip steel containing boron and manufacturing method thereof | |
| CN103725974A (en) | Novel low-cost wear-resistant pipe steel X65 steel plate and production method thereof | |
| CN109097681A (en) | A kind of high intensity is low to be mingled with autobody sheet and its continuous casting process electromagnetic agitation technique | |
| WO2019029533A1 (en) | Cast steel, preparation method for cast steel and use of cast steel | |
| CN115491575B (en) | High-carbon chromium wind power bearing steel and production process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180426 Address after: 244000 Yishan street, lion mountain in Tongling, Anhui Patentee after: Tongling Zhongche Changjiang Vehicle Co Ltd Address before: 430212 Jiangxia New Economic Development Zone, Wuhan, Hubei Patentee before: China South Locomotive & Rolling Stock Changjiang Vehicle Company |