CN104480370A - Manufacturing method of high-hardness grade B steel cast wheel - Google Patents
Manufacturing method of high-hardness grade B steel cast wheel Download PDFInfo
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- CN104480370A CN104480370A CN201410801736.9A CN201410801736A CN104480370A CN 104480370 A CN104480370 A CN 104480370A CN 201410801736 A CN201410801736 A CN 201410801736A CN 104480370 A CN104480370 A CN 104480370A
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Abstract
The invention belongs to the technical field of cast steel wheels, and particularly relates to a manufacturing method of a high-hardness grade B steel cast wheel. The hardness of the grade B steel is controlled in 302-341 HB. The method comprises wheel smelting and thermal treatment, wherein the thermal treatment comprises steps as follows: the wheel is sequentially subjected to heating, heat preservation, quenching and tempering, and the heating and heat preservation operation is performed at the temperature of 880 DEG C-920 DEG C for 90 minutes. With adoption of the manufacturing method of the high-hardness grade B steel cast wheel, the quenching hardness of the grade B steel wheel can meet the requirement of a carbon steel wheel M-107/M-208 specification in AAR (Association of American Railroads), the wheel export condition is met, the production capacity of an enterprise is improved, and the enterprise competitiveness is improved.
Description
Technical field
The invention belongs to cast steel wheel preparing technical field, particularly a kind of manufacture method of high rigidity level-B steel cast steel wheel.
Background technology
Be 277 ~ 341HB according to the hardness of the composition cast steel wheel of the level-B steel of Chinese Railway TB/T1013-2011 standard-required, the cast steel wheel hardness of current domestic production can both meet this area requirement substantially, but all relatively on the low side.And supply is European, America level-B steel cast steel wheel necessarily requires to meet " the carbon steel wheel M-107/M-208 specification of AAR ", the outer rim surface hardness of this code requirement level-B steel cast steel wheel is 302 ~ 341HB.This code requirement hardness is overall higher and durometer level is narrow, and the technique of domestic production cast steel wheel does not also reach this durometer level requirement.Therefore the wheel limiting domestic enterprise's production exports to some countries in Europe, America, constrains the development of domestic enterprise.
Summary of the invention
The object of this invention is to provide a kind of manufacture method of high rigidity level-B steel cast steel wheel, obtained cast steel wheel hardness meets 302 ~ 341HB.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.
A manufacture method for high rigidity level-B steel cast steel wheel, the hardness of described level-B steel, at 302 ~ 341HB, comprises smelting and the thermal treatment of wheel, its thermal treatment comprises carries out heating and thermal insulation by wheel successively, then quench, carry out tempering afterwards, heating and thermal insulation is operating as at 880-920 DEG C of insulation 90min.
Preferably, heating and thermal insulation is operating as at 900 DEG C of insulation 90min.
During quenching, the quenching water yield is 250-370L/Min, and the cool time is 4.5min.
Preferably, the water yield of quenching is 290L/Min.
Tempering temperature is 430-470 DEG C.
Preferably, tempering temperature is 430 DEG C.
More preferred, when wheel is smelted, in pouring ladle, regulate carbon content to be 0.61 ~ 0.67%, Fe content is 0.75 ~ 0.90%, and silicone content is 0.55 ~ 0.70%.
After wheel heat processing, when detecting its hardness, check point and tread chamfering lower edge distance are 5 ~ 10mm.
Improve the chemical composition of level-B steel composition cast steel wheel mainly in order to increase the hardening capacity of wheel, reinforced ferrite also increases strengthening item etc. on ferritic matrix.Change quenching (temperature namely heated), tempering temperature mainly increase the condensate depression of quenching, improve the structural transformation etc. of wheel.Improve the quenching water yield of wheel and to extend cool time of wheel be strengthen speed of cooling to wheel and the cooling degree of depth, the sorbite of wheel tread and troostite are increased, thus increases wheel hardness.The hardness determination position of regulation wheel is the dispersity in order to reduce wheel hardness.
The present invention carries out the improvement of manufacturing process in aspect from the position of the control of composition when smelting, heat treated links and hardness determination etc., final realization by the Hardness Control of level-B steel cast steel wheel at 302 ~ 341HB, make the quenching hardness of level-B steel wheel reach the requirement of the carbon steel wheel M-107/M-208 specification of AAR, meet wheel exit condition.
Compared with prior art, tool has the following advantages in the present invention:
Adopt the manufacture method of high rigidity level-B steel cast steel wheel of the present invention that the quenching hardness of level-B steel wheel can be made to reach the requirement of the carbon steel wheel M-107/M-208 specification of AAR, meet wheel exit condition, widen the throughput of enterprise, improve enterprise competitiveness.
Accompanying drawing explanation
Fig. 1 is the hardness distribution detected 1376 wheels adopting embodiment 1 manufacture method to obtain.
Embodiment
With specific embodiment, technical scheme of the present invention is described below, but protection scope of the present invention is not limited thereto.
Embodiment 1
A manufacture method for high rigidity level-B steel cast steel wheel, described method comprises smelting and the thermal treatment of wheel, and its thermal treatment comprises carries out heating and thermal insulation by wheel successively, then quenches, carries out tempering afterwards.
Wherein, when wheel is smelted, in pouring ladle, regulate carbon content to be 0.63%, Fe content is 0.8%, and silicone content is 0.60%.The content of other composition is with reference to the composition control overflow of " ZL-B " in 4.1.1.1 clause table 2 in " carbon steel cast steel wheel technical qualification " (TB/T1013-2011) specification, and embodiment 2,3 is same in accordance with this standard.
During thermal treatment, wheel is heating also held for some time in the gas furnace (i.e. ring furnace) of annular first, then coming out of the stove to be mapped on wheel excircle by high pressure water jets forces cooling to realize wheel selective hardening, then enters the tempering of linear combustion gas tempering stove, namely completes the heat treatment step of wheel.
The present invention adopts 2 heat-treatment production lines, is called 1# line and 2# line.1# line has 1# ring furnace, 1# tempering stove and 1# ~ 4# quenching machine to form, and 2# line has 2# ring furnace, 2# tempering stove and 5# ~ 8# quenching machine to form.
Wherein, heating and thermal insulation is operating as at 900 DEG C of insulation 90min.During quenching, the quenching water yield is 290L/Min, and the cool time is 4.5min.Tempering temperature is 430 DEG C.
After wheel heat processing, when detecting its hardness, check point and tread chamfering lower edge distance are 8mm.
The wheel of the present embodiment process meets the requirement of Europe and America standard.Detect 1376 wheels, its Hardness Distribution is as Fig. 1, and average hardness is 325.2HBW.
Mechanical property detected result is done as following table to wherein random a slice wheel:
The mechanical property of wheel is qualified.
Embodiment 2
A manufacture method for high rigidity level-B steel cast steel wheel, described method comprises smelting and the thermal treatment of wheel, and its thermal treatment comprises carries out heating and thermal insulation by wheel successively, then quenches, carries out tempering afterwards.
Wherein, when wheel is smelted, in pouring ladle, regulate carbon content to be 0.67%, Fe content is 0.75%, and silicone content is 0.55%.
Heating and thermal insulation is operating as at 880 DEG C of insulation 90min.During quenching, the quenching water yield is 250L/Min, and the cool time is 4.5min.Tempering temperature is 450 DEG C.
After wheel heat processing, when detecting its hardness, check point and tread chamfering lower edge distance are 7mm.Other are with embodiment 1.Detect 896 wheels prepared by the present embodiment, hardness is all within the scope of 302-341HBW, and average hardness is 319.8HBW.
Embodiment 3
A manufacture method for high rigidity level-B steel cast steel wheel, described method comprises smelting and the thermal treatment of wheel, and its thermal treatment comprises carries out heating and thermal insulation by wheel successively, then quenches, carries out tempering afterwards.
Wherein, when wheel is smelted, in pouring ladle, regulate carbon content to be 0.61%, Fe content is 0.90%, and silicone content is 0.70%.
Wherein, heating and thermal insulation is operating as at 920 DEG C of insulation 90min.During quenching, the quenching water yield is 320L/Min, and the cool time is 4.5min.Tempering temperature is 470 DEG C.
After wheel heat processing, when detecting its hardness, check point and tread chamfering lower edge distance are 10mm.Other are with embodiment 1.Detect 1258 wheels prepared by the present embodiment, hardness is all within the scope of 302-341HBW, and average hardness is 321.8HBW.
Comparative example:
When wheel is smelted, in pouring ladle, carbon content is 0.57%, Fe content is 0.6%, and silicone content is 0.2%, and the content of other composition is with reference to the composition control overflow of " ZL-B " in 4.1.1.1 clause table 2 in " carbon steel cast steel wheel technical qualification " (TB/T1013-2011) specification.
Wherein, heating and thermal insulation is operating as at 870 DEG C of insulation 90min.During quenching, the quenching water yield is 190L/Min, and the cool time is 3.5min.Tempering temperature is 475 DEG C.
After wheel heat processing, when detecting its hardness, check point and tread chamfering lower edge distance are 15mm.
Other are with embodiment 1.
Detect 1163 wheels prepared by present method, hardness is all within the scope of 277-341HBW, and average hardness is 283.5HBW.
Claims (8)
1. the manufacture method of a high rigidity level-B steel cast steel wheel, the hardness of described level-B steel is at 302 ~ 341HB, described method comprises smelting and the thermal treatment of wheel, its thermal treatment comprises carries out heating and thermal insulation by wheel successively, then quench, carry out tempering afterwards, it is characterized in that, heating and thermal insulation is operating as at 860-940 DEG C of insulation 90min.
2. the manufacture method of high rigidity level-B steel cast steel wheel as claimed in claim 1, is characterized in that, heating and thermal insulation is operating as at 900 DEG C of insulation 90min.
3. the manufacture method of high rigidity level-B steel cast steel wheel as claimed in claim 1, it is characterized in that, during quenching, the quenching water yield is 250-370L/Min, and the cool time is 4.5min.
4. the manufacture method of high rigidity level-B steel cast steel wheel as claimed in claim 3, it is characterized in that, during quenching, the quenching water yield is 290L/Min.
5. the manufacture method of high rigidity level-B steel cast steel wheel as claimed in claim 3, it is characterized in that, tempering temperature is 430-470 DEG C.
6. the manufacture method of high rigidity level-B steel cast steel wheel as claimed in claim 5, it is characterized in that, tempering temperature is 430 DEG C.
7. the manufacture method of the high rigidity level-B steel cast steel wheel as described in as arbitrary in claim 1-6, is characterized in that, when wheel is smelted, in pouring ladle, regulate carbon content to be 0.61 ~ 0.67%, Fe content is 0.75 ~ 0.90%, and silicone content is 0.55 ~ 0.70%.
8. the manufacture method of high rigidity level-B steel cast steel wheel as claimed in claim 7, it is characterized in that, after wheel heat processing, when detecting its hardness, check point and tread chamfering lower edge distance are 5 ~ 10mm.
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| CN201410801736.9A CN104480370A (en) | 2014-12-23 | 2014-12-23 | Manufacturing method of high-hardness grade B steel cast wheel |
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| CN201410801736.9A CN104480370A (en) | 2014-12-23 | 2014-12-23 | Manufacturing method of high-hardness grade B steel cast wheel |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4364772A (en) * | 1981-05-28 | 1982-12-21 | Titanium Metals Corporation Of America | Rail wheel alloy |
| US6372057B1 (en) * | 2000-06-01 | 2002-04-16 | Sumitomo Metal Industries, Inc. | Steel alloy railway wheels |
| CN1374206A (en) * | 2001-03-05 | 2002-10-16 | 阿姆斯泰德工业公司 | Railway wheels alloy |
| CN101314833A (en) * | 2008-02-29 | 2008-12-03 | 马鞍山钢铁股份有限公司 | Wheel steel for heavy duty goods train and manufacture method thereof |
| CN101497958A (en) * | 2008-01-31 | 2009-08-05 | 中国铁道科学研究院金属及化学研究所 | Heavy lorry casting wheel steel |
| RU2369658C1 (en) * | 2008-12-18 | 2009-10-10 | Открытое Акционерное Общество "Российские Железные Дороги" | Steel of upgraded hardness |
-
2014
- 2014-12-23 CN CN201410801736.9A patent/CN104480370A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4364772A (en) * | 1981-05-28 | 1982-12-21 | Titanium Metals Corporation Of America | Rail wheel alloy |
| US6372057B1 (en) * | 2000-06-01 | 2002-04-16 | Sumitomo Metal Industries, Inc. | Steel alloy railway wheels |
| US20020074065A1 (en) * | 2000-06-01 | 2002-06-20 | Sumitomo Metal Industries, Inc. | Steel alloy for railway wheels |
| CN1374206A (en) * | 2001-03-05 | 2002-10-16 | 阿姆斯泰德工业公司 | Railway wheels alloy |
| CN101497958A (en) * | 2008-01-31 | 2009-08-05 | 中国铁道科学研究院金属及化学研究所 | Heavy lorry casting wheel steel |
| CN101314833A (en) * | 2008-02-29 | 2008-12-03 | 马鞍山钢铁股份有限公司 | Wheel steel for heavy duty goods train and manufacture method thereof |
| RU2369658C1 (en) * | 2008-12-18 | 2009-10-10 | Открытое Акционерное Общество "Российские Железные Дороги" | Steel of upgraded hardness |
Non-Patent Citations (1)
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| 朱昌逑等: "铁路重载货车车轮新材料的研制", 《钢铁》 * |
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Application publication date: 20150401 |