CN102808132B - Traction seat casting and processing technology - Google Patents
Traction seat casting and processing technology Download PDFInfo
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- CN102808132B CN102808132B CN201110146388.2A CN201110146388A CN102808132B CN 102808132 B CN102808132 B CN 102808132B CN 201110146388 A CN201110146388 A CN 201110146388A CN 102808132 B CN102808132 B CN 102808132B
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Abstract
The invention provides a traction seat casting and processing technology. The traction seat casting and processing technology comprises the steps of: pouring liquid steel into a sand mould to form a traction seat, wherein the components of the liquid steel are 0.20-0.25% of Carbon, 0.40-0.60% of silicon, 1.10-1.20% of manganese, not greater than 0.030% of phosphorus, not greater than 0.030% of sulfur, 0.20-0.30% of nickel, 0.20-0.30% of chromium, not greater than 0.12% of molybdenum, not greater than 0.30% of copper and less than 0.03% of vanadium; shaking out sands and clearing up; and performing heat treatment on the traction seat. The traction seat casting and processing technology provided by the invention has the advantages of better mechanical performances of processed traction seat castings, convenience and simplicity for operation, and capabilities of efficiently avoiding defects such as shrinkage cavity, shrinkage porosity and creak as rational component proportion of the liquid steel is set and the heat treatment is performed.
Description
Technical field
The present invention relates to Machine Manufacturing Technology, relate in particular to a kind of traction seat casting and treatment process.
Background technology
Traction seat is that electric locomotive drives the significant components in transmission system, traction seat intensity directly affects the quality safety of locomotive, selects rational material mixture ratio to carry out cast and the suitable treatment process of traction seat particularly important to manufacturing intensity traction seat high, that performance is good.
Summary of the invention
The invention provides a kind of traction seat casting and treatment process, high to process intensity, the traction seat that performance is good.
The invention provides a kind of traction seat casting and treatment process, wherein, comprising:
Pouring molten steel, in sand mold, is formed to traction seat; The composition of described molten steel comprises: carbon is 0.20-0.25%; Silicon is 0.40-0.60%; Manganese is 1.10-1.20%; Phosphorus≤0.030%; Sulphur≤0.030%; Nickel is 0.20-0.30%; Chromium is 0.20-0.30%; Molybdenum≤0.12%; Copper≤0.30%; Vanadium < 0.03%;
Traction seat is heat-treated.
Traction seat as above casting and treatment process, wherein, described traction seat is heat-treated specifically and comprised:
Described traction seat is carried out to modifier treatment, first described traction seat is carried out to quench treatment, then carry out temper; Quenching and preserving heat temperature is 890 ℃, and soaking time is 4 hours, adopts to be less than the water of 40 ℃ and to carry out cooling; Tempering holding temperature is 480 ℃, and soaking time is 4 hours, adopts to be less than the water of 40 ℃ and to carry out cooling.
Traction seat as above casting and treatment process, wherein, by pouring molten steel to before in sand mold, also comprise:
In mo(u)ld top half sandbox, place insulated feeder, make the mo(u)ld top half of sand mold.
Traction seat as above casting and treatment process, wherein, describedly in mo(u)ld top half sandbox, place insulated feeder and specifically comprise:
In mo(u)ld top half sandbox, placing two diameters is 160mm, the circular rising head that the degree of depth is 230mm and two square rising heads, and the length of described two square rising heads * wide * high size is respectively 230mm * 180mm * 310mm and 220mm * 165mm * 310mm.
Traction seat casting as above and treatment process, wherein, after the mo(u)ld top half of described making sand mold, also comprise:
Chromite sand is laid at round edge place in mo(u)ld top half die cavity; Laying length is 240-270mm, and laying depth is 30-50mm.
Traction seat casting as above and treatment process, wherein, after the mo(u)ld top half of described making sand mold, also comprise:
In mo(u)ld bottom half sandbox, place a plurality of external chills, make the mo(u)ld bottom half of sand mold.
Traction seat casting as above and treatment process, wherein, after the mo(u)ld bottom half of described making sand mold, also comprise:
Lay chromite sand and lay whole round edge at round edge place in mo(u)ld bottom half die cavity, and laying depth is 30-50mm.
Traction seat as above casting and treatment process, wherein, by pouring molten steel to before forming traction seat in sand mold, also comprise:
Make the first core and the second core, at the fillet place of described the first core and the second core, lay chromite sand, laying depth is 30-50mm; Outside surface at described the second core arranges a plurality of external chills.
Traction seat casting as above and treatment process, wherein, before the outside surface of described the second core arranges a plurality of external chills, also comprise:
The iron rod that diameter is 10mm is placed in inside at described the second core.
Traction seat provided by the invention casting and treatment process be by setting rational molten steel proportioning components, and heat treatment process makes the traction seat foundry goods mechanical property that processes better, easy and simple to handle, can effectively avoid the generation of shrinkage cavity and porosity, defects i.e.cracks.
Accompanying drawing explanation
Traction seat casting and processing technological flow schematic diagram that Fig. 1 provides for the embodiment of the present invention one.
The traction seat casting that Fig. 2 provides for the embodiment of the present invention two and the traction seat sand mold mo(u)ld top half structural representation for the treatment of process manufacturing.
The traction seat casting that Fig. 3 provides for the embodiment of the present invention two and the traction seat sand mold mo(u)ld bottom half structural representation for the treatment of process manufacturing.
The traction seat casting that Fig. 4 provides for the embodiment of the present invention two and the first sand core structure schematic diagram for the treatment of process made.
The traction seat casting that Fig. 5 provides for the embodiment of the present invention two and the second sand core structure schematic diagram for the treatment of process made.
One-piece construction schematic diagram in the traction seat casting that Fig. 6 provides for the embodiment of the present invention two and treatment process after mo(u)ld top half and mo(u)ld bottom half mould assembling.
Reference numeral:
1-mo(u)ld top half; The circular rising head of 2-; The square rising head of 3-;
4-chromite sand; 5-mo(u)ld bottom half; 6-external chill;
7-the first core; 8-the second core; 9-iron rod.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment mono-
Traction seat casting and processing technological flow schematic diagram that Fig. 1 provides for the embodiment of the present invention one, the embodiment of the present invention one provides a kind of traction seat casting and treatment process, comprises the steps:
The mechanical property of the traction seat that above-mentioned technique is produced requires as shown in Table 1:
Table one traction seat mechanical property requires index
| Tensile strength | Yield strength | Elongation after fracture | Ballistic work (40 ℃) | Quenching and tempering hardness |
| 700-800Mpa | ≥550Mpa | ≥12％ | ≥27J | 200-250HB |
Wherein above-mentioned traction seat casting and treatment process comprise: pouring molten steel, in sand mold, is formed to traction seat; Traction seat is heat-treated.For obtaining the traction seat of better mechanical property, the molten steel of setting for pouring into a mould comprises following composition: carbon is 0.20-0.25%; Silicon is 0.40-0.60%; Manganese is 1.10-1.20%; Phosphorus≤0.030%; Sulphur≤0.030%; Nickel is 0.20-0.30%; Chromium is 0.20-0.30%; Molybdenum≤0.12%; Copper≤0.30%; Vanadium < 0.03%, reasonably material mixture ratio can effectively be avoided the generation of shrinkage cavity and porosity, defects i.e.cracks.
In the present embodiment, above-mentioned heat treatment process specifically comprises: traction seat is carried out to modifier treatment, be specially: first traction seat is carried out to quench treatment, then carry out temper; Wherein, quenching and preserving heat temperature is 890 ℃, and soaking time is 4 hours, adopts to be less than the water of 40 ℃ and to carry out cooling; Tempering holding temperature is 480 ℃, and soaking time is 4 hours, adopts to be less than the water of 40 ℃ and to carry out coolingly, has improved intensity and the toughness of traction seat by modifier treatment, and comprehensive mechanical property is better.
Traction seat casting and treatment process that the embodiment of the present invention one provides, make by setting rational molten steel proportioning components and heat treatment process the traction seat satisfactory mechanical property processing, thereby improved the quality of locomotive.
Embodiment bis-
The traction seat casting that Fig. 2 provides for the embodiment of the present invention two and the traction seat sand mold mo(u)ld top half structural representation for the treatment of process manufacturing, the embodiment of the present invention two provides a kind of traction seat casting and treatment process, with the difference of embodiment mono-be, by pouring molten steel to before in sand mold, in mo(u)ld top half sandbox, place insulated feeder, make the mo(u)ld top half 1 of sand mold, it is 160mm that two diameters are preferably set, the degree of depth is circular rising head 2 and two the square rising heads 3 of 230mm, the length of above-mentioned two square rising heads 3 * wide * high size is respectively 230mm * 180mm * 310mm and 220mm * 165mm * 310mm, the placement location of square rising head 3 is according to the actual concrete size Selection of traction seat foundry goods, at this, do not do concrete restriction, the placement of rising head can improve the feeding capacity of traction seat foundry goods.
Further, after making the mo(u)ld top half 1 of sand mold, chromite sand 4 is laid at the round edge place in mo(u)ld top half die cavity; Laying length is 240-270mm, and laying depth is 30-50mm.
The traction seat casting that Fig. 3 provides for the embodiment of the present invention two and the traction seat sand mold mo(u)ld bottom half structural representation for the treatment of process manufacturing after mo(u)ld top half completes, are placed a plurality of external chills 6 in mo(u)ld bottom half sandbox, make the mo(u)ld bottom half 5 of sand mold; Concrete restriction is not done in the position that external chill 6 arranges, and object is to make traction seat foundry goods cooling evenly; Chromite sand 4 is similar with laying in mo(u)ld top half, can lay chromite sand 4 and lay whole bevelling in the round edge place in mo(u)ld bottom half die cavity, laying depth is 30-50mm, and the chromite sand 4 of laying can, when knockout molding is carried out at the position that foundry goods is had to seamed edge, more easily take out foundry goods.
When making sand mold, can make core, the traction seat casting that Fig. 4 provides for the embodiment of the present invention two and the first sand core structure schematic diagram for the treatment of process made, the traction seat casting that Fig. 5 provides for the embodiment of the present invention two and the second sand core structure schematic diagram for the treatment of process made, one-piece construction schematic diagram in the traction seat casting that Fig. 6 provides for the embodiment of the present invention two and treatment process after mo(u)ld top half and mo(u)ld bottom half mould assembling, chromite sand 4 is laid at fillet and round edge place at the first core 7, and laying depth is 30-50mm; The iron rod 9 that diameter is 10mm is placed in inside at the second core 8, so that core is played to booster action; Outside surface at the second core 8 arranges a plurality of external chills 6, makes core cooling evenly.
Extract three traction seats of making by above-mentioned technique and carry out mechanicl test, result as shown in Table 2.
Three traction seat average mechanical performances of table two
| Tensile strength | Yield strength | Elongation after fracture | Ballistic work (40 ℃) mean value | Quenching and tempering hardness |
| 735Mpa | 595Mpa | 20.5％ | 34J | 225/226/229HB |
Compare and can find out with table one, its mechanical property reaches expectation index completely.
The traction seat casting that the embodiment of the present invention two provides and treatment process by increasing the techniques such as insulated feeder, external chill and chromite sand in castingprocesses, make the traction seat foundry goods mechanical property that processes better, can effectively avoid the generation of shrinkage cavity and porosity, defects i.e.cracks.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. traction seat casting and a treatment process, is characterized in that, comprising:
Pouring molten steel, in sand mold, is formed to traction seat; The composition of described molten steel comprises: carbon is 0.20-0.25%; Silicon is 0.40-0.60%; Manganese is 1.10-1.20%; Phosphorus≤0.030%; Sulphur≤0.030%; Nickel is 0.20-0.30%; Chromium is 0.20-0.30%; Molybdenum≤0.12%; Copper≤0.30%; Vanadium < 0.03%;
Traction seat is heat-treated; Described traction seat heat-treated specifically and comprised:
Described traction seat is carried out to modifier treatment, first described traction seat is carried out to quench treatment, then carry out temper; Quenching and preserving heat temperature is 890 ℃, and soaking time is 4 hours, adopts to be less than the water of 40 ℃ and to carry out cooling; Tempering holding temperature is 480 ℃, and soaking time is 4 hours, adopts to be less than the water of 40 ℃ and to carry out cooling.
2. traction seat according to claim 1 casting and treatment process, is characterized in that, by pouring molten steel to before in sand mold, also comprise:
In mo(u)ld top half sandbox, place insulated feeder, make the mo(u)ld top half of sand mold.
3. traction seat according to claim 2 casting and treatment process, is characterized in that, describedly in mo(u)ld top half sandbox, places insulated feeder and specifically comprise:
In mo(u)ld top half sandbox, placing two diameters is 160mm, the circular rising head that the degree of depth is 230mm and two square rising heads, and the length of described two square rising heads * wide * high size is respectively 230mm * 180mm * 310mm and 220mm * 165mm * 310mm.
4. according to traction seat casting and treatment process described in claim 2 or 3, it is characterized in that, after the mo(u)ld top half of described making sand mold, also comprise:
Chromite sand is laid at round edge place in mo(u)ld top half die cavity; Laying length is 240-270mm, and laying depth is 30-50mm.
5. according to traction seat casting and treatment process described in claim 2 or 3, it is characterized in that, after the mo(u)ld top half of described making sand mold, also comprise:
In mo(u)ld bottom half sandbox, place a plurality of external chills, make the mo(u)ld bottom half of sand mold.
6. traction seat casting according to claim 5 and treatment process, is characterized in that, after the mo(u)ld bottom half of described making sand mold, also comprises:
Lay chromite sand and lay whole round edge at round edge place in mo(u)ld bottom half die cavity, and laying depth is 30-50mm.
7. traction seat according to claim 1 casting and treatment process, is characterized in that, by pouring molten steel to before in sand mold, also comprise:
Make the first core and the second core, at the fillet place of described the first core and the second core, lay chromite sand, laying depth is 30-50mm; Outside surface at described the second core arranges a plurality of external chills.
8. traction seat casting according to claim 7 and treatment process, is characterized in that, before the outside surface of the second core arranges a plurality of external chills, also comprises:
The iron rod that diameter is 10mm is placed in inside at described the second core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110146388.2A CN102808132B (en) | 2011-06-01 | 2011-06-01 | Traction seat casting and processing technology |
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|---|---|---|---|
| CN201110146388.2A CN102808132B (en) | 2011-06-01 | 2011-06-01 | Traction seat casting and processing technology |
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| CN102808132A CN102808132A (en) | 2012-12-05 |
| CN102808132B true CN102808132B (en) | 2014-03-12 |
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| CN109093071A (en) * | 2018-09-20 | 2018-12-28 | 天长市兴宇铸造有限公司 | A kind of casting of traction seat and treatment process |
| CN111172477B (en) * | 2019-12-30 | 2021-07-02 | 宝鼎重工有限公司 | High-yield, low-temperature and high-toughness seat frame steel casting for deep-sea ship and manufacturing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4542624B2 (en) * | 2008-11-11 | 2010-09-15 | 新日本製鐵株式会社 | High strength thick steel plate and manufacturing method thereof |
| CN101838776A (en) * | 2010-04-28 | 2010-09-22 | 西林钢铁集团阿城钢铁有限公司 | High-strength and low-temperature tough steel |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4542624B2 (en) * | 2008-11-11 | 2010-09-15 | 新日本製鐵株式会社 | High strength thick steel plate and manufacturing method thereof |
| CN101838776A (en) * | 2010-04-28 | 2010-09-22 | 西林钢铁集团阿城钢铁有限公司 | High-strength and low-temperature tough steel |
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Address after: 037038 No.1 Qianjin Street, Pingcheng District, Datong City, Shanxi Province Patentee after: CRRC DATONG Co.,Ltd. Address before: 1 No. 037038, Daqing Road, Shanxi, Datong Patentee before: DATONG ELECTRIC LOCOMOTIVE Co.,Ltd. OF CNR |
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