CN103215510A - Novel automobile axle housing and preparation method thereof - Google Patents
Novel automobile axle housing and preparation method thereof Download PDFInfo
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- CN103215510A CN103215510A CN2013101396143A CN201310139614A CN103215510A CN 103215510 A CN103215510 A CN 103215510A CN 2013101396143 A CN2013101396143 A CN 2013101396143A CN 201310139614 A CN201310139614 A CN 201310139614A CN 103215510 A CN103215510 A CN 103215510A
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- axle housing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a novel automobile axle housing and a preparation method thereof, belongs to the field of mechanical hot processing and aims at solving the problems that the conventional automobile axle is large in wall thickness, light in weight, limited in load capacity and the like. The novel automobile axle housing comprises the following components in percentage by weight: 0.35%-0.45% of carbon, not more than 0.30% of sulfur, 1%-2% of manganese, not more than 0.30% of phosphor, 0.2%-0.5% of silicon, 0.5%-0.8% of chromium, not more than 1% of other residual elements and the balance being iron. The preparation method of the novel automobile axle housing is used for improving the content of manganese and chromium elements on the condition of regularly casting carbon steel chemical components, and adjusting the content of molten steel and other elements without adding noble metal elements including vanadium or molybdenum and the like, so that a high-strength casting steel axle housing product with good mechanical performances, which complies with the regulations and rules, is manufactured by adopting a normal thermal treatment way. The automobile axle housing manufactured by the components and the manufacturing method disclosed by the invention is smaller in wall thickness and lighter in weight; moreover, the mechanical performances satisfy or exceed the national standards, so that the casting cost is reduced and the load capacity of the car is improved.
Description
Technical field
The invention belongs to the mechanical hot processing field, relate to a kind of novel axle housing and preparation method.
Background technology
Automobile axle housing is the important component of automobile, requires very high to its mechanical performance of products.The axle housing component structural that heavily blocks automobile at present domestic is divided into monoblock type and releasable, and monoblock type is divided into monoblock casting formula, steel plate punching press welded type and steel pipe expanding.The used material of wherein monoblock casting formula is generally spheroidal graphite cast iron, ZG310-570, ZG270-500, ZG25Mn, ZG40Cr etc.Adopt the automobile axle housing general requirement axle housing of these material manufacturings will possess enough thickness, can increase the weight of axle housing like this, thereby increase the cost of enterprise, and influence the weight-carrying capacity of automobile.
Summary of the invention
The purpose of this invention is to provide a kind of the assurance under the life-span prerequisite, energy attenuate automobile axle housing wall thickness improves the axle housing castability, reduces axle housing weight, thereby improve automobile axle housing of carload lot and preparation method thereof, to strengthen the automobile axle housing competitiveness of product in market.
General thought of the present invention is under the prerequisite of conventional cast carbon steel chemistry composition, improve the content of manganese and chromium element, do not add valuable alloying elements such as vanadium or molybdenum, adjust the content of other element of molten steel, adopt correct heat treatment mode, with the high strength that produces the rules that are in conformity with law and the cast steel axle housing product of good mechanical properties.
For achieving the above object, the present invention is by the following technical solutions:
A kind of new automobile axle housing, each constituent mass per-cent of this new automobile axle housing is: the carbon of 0.35%-0.45%, the sulphur smaller or equal to 0.30%, the manganese of 1%-1.2%, the phosphorus smaller or equal to 0.30%, the silicon of 0.2%-0.5%, the chromium of 0.5%-0.8%, other residual element smaller or equal to 1%, surplus is an iron.
A kind of new automobile axle housing preparation method may further comprise the steps:
10% steel cuttings put into be smelted into molten steel in the intermediate frequency furnace;
The chromium of input 0.7% and 75% steel scrap are treated behind the scrap melting molten refining temperature to be increased to 1510-1550 ℃;
Deslagging, molten steel sampling analysis in the intermediate frequency furnace again;
Continuation is increased to 1610-1630 ℃ with smelting temperature;
According to molten steel sample result of laboratory test, add furnace charge;
Drop into the mid-carbon fe-mn alloy, treat the mid-carbon fe-mn alloy melting after, smelting temperature is increased to 1610-1630 ℃ once more, stop heating in medium frequency then, remove the molten steel surface scum silica frost, molten steel sampling analysis in the intermediate frequency furnace confirms that molten steel sample chemical composition is in required target zone again;
The aluminum steel that will go out steel quality 0.12% joins in the ladle with molten steel, pours into a mould;
The automobile axle housing body that the cast back forms carries out normalizing thermal treatment at holding temperature 880-900 ℃;
Carry out tempering heat treatment at holding temperature 400-450 ℃;
Finished product.
Adopt the axle housing of said components and preparation method preparation, its metallographic structure is perlite+ferrite, the ferrite of noresidue as-cast structure and net distribution (microstructure coarsening), tensile strength 〉=690MPa, yield strength 〉=340MPa, elongation after fracture 〉=14%, relative reduction in area 〉=30%, hardness HB190-220, the automobile axle housing body weight can reduce by 15%.The test-results of system shows, novel axle housing body material has good comprehensive performances, through carrying out bench testing according to QC/T533-1999 " automobile drive axle bench testing method " and QC/T534-1999 " automobile drive axle bench testing evaluation index ", its vertical curve fatigue life test cycle index is 1,930,000 times (automobile industry standard requires more than or equal to 800,000 times), and the vertical curve test of static strength limit is planted the requirement of lotus 1058.8KN(automobile automobile industry standard more than or equal to 800KN).
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is a kind of novel axle housing synoptic diagram of the present invention.
Fig. 2 is the D-D sectional view of Fig. 1;
Fig. 3 is an axle housing Chinese lute hole sectional view.
Embodiment
A kind of novel axle housing, its each constituent mass per-cent is: the carbon of 0.35%-0.45%, the sulphur smaller or equal to 0.30%, the manganese of 1%-1.2%, the phosphorus smaller or equal to 0.30%, the silicon of 0.2%-0.5%, the chromium of 0.5%-0.8%, other residual element smaller or equal to 1%, surplus is an iron.
A kind of new automobile axle housing preparation method may further comprise the steps:
10% steel cuttings put into be smelted into molten steel in the intermediate frequency furnace;
The chromium of input 0.7% and 75% steel scrap are treated behind the scrap melting molten refining temperature to be increased to 1510-1550 ℃;
Deslagging, molten steel sampling analysis in the intermediate frequency furnace again;
Continuation is increased to 1610-1630 ℃ with smelting temperature;
According to molten steel sample result of laboratory test, add furnace charge;
Drop into the mid-carbon fe-mn alloy, treat the mid-carbon fe-mn alloy melting after, smelting temperature is increased to 1610-1630 ℃ once more, stop heating in medium frequency then, remove the molten steel surface scum silica frost, molten steel sampling analysis in the intermediate frequency furnace confirms that molten steel sample chemical composition is in required target zone again;
The aluminum steel that will go out steel quality 0.12% joins in the ladle with molten steel, pours into a mould;
The automobile axle housing body that the cast back forms carries out normalizing thermal treatment at holding temperature 880-900 ℃;
Carry out tempering heat treatment at holding temperature 400-450 ℃;
Finished product.
Use the automobile axle housing body that above-mentioned new component and novel process are produced, the housing wall thickness reduction, as shown in Figure 2, the vertical wall thickness in D-D cross section is thinned to 16 millimeters by 20 millimeters, and the wall thickness of horizontal direction is thinned to 20 millimeters by 27 millimeters; As shown in Figure 3, cross section, Chinese lute hole wall thickness is thinned to 25 millimeters by 30 millimeters, makes the automobile axle housing body weight totally reduce by 15%.And this automobile axle housing body has favorable mechanical performance and over-all properties through overtesting, its tensile strength 〉=690MPa, yield strength 〉=340MPa, elongation after fracture 〉=14%, relative reduction in area 〉=30%, hardness HB190-220; Through bench testing, its vertical fatigue life test cycle index is 1,930,000 times, and the test of static strength limit is planted lotus 1058.8KN, and every technical indicator meets or exceeds the automobile axle housing national standard.
Claims (2)
1. new automobile axle housing, it is characterized in that, each constituent mass per-cent of this new automobile axle housing is: the carbon of 0.35%-0.45%, sulphur smaller or equal to 0.30%, the manganese of 1%-1.2%, phosphorus smaller or equal to 0.30%, the silicon of 0.2%-0.5%, the chromium of 0.5%-0.8%, other residual element smaller or equal to 1%, surplus is an iron.
2. a kind of new automobile axle housing preparation method according to claim 1 is characterized in that said method comprising the steps of:
(1) 10% steel cuttings is put into is smelted into molten steel in the intermediate frequency furnace;
(2) chromium of input 0.7% and 75% steel scrap are treated behind the scrap melting molten refining temperature to be increased to 1510-1550 ℃;
(3) deslagging, molten steel sampling analysis in the intermediate frequency furnace again;
(4) continue smelting temperature is increased to 1610-1630 ℃;
(5) according to molten steel sample result of laboratory test, add furnace charge;
(6) drop into the mid-carbon fe-mn alloy, treat the mid-carbon fe-mn alloy melting after, smelting temperature is increased to 1610-1630 ℃ once more, stop heating in medium frequency then, remove the molten steel surface scum silica frost, molten steel sampling analysis in the intermediate frequency furnace confirms that molten steel sample chemical composition is in required target zone again;
(7) aluminum steel that will go out steel quality 0.12% joins in the ladle with molten steel, pours into a mould;
(9) the automobile axle housing body of cast back formation carries out normalizing thermal treatment at holding temperature 880-900 ℃;
(10) carry out tempering heat treatment at holding temperature 400-450 ℃;
(11) finished product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101396143A CN103215510A (en) | 2013-04-19 | 2013-04-19 | Novel automobile axle housing and preparation method thereof |
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| CN2013101396143A CN103215510A (en) | 2013-04-19 | 2013-04-19 | Novel automobile axle housing and preparation method thereof |
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| CN103215510A true CN103215510A (en) | 2013-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081218A (en) * | 2015-08-21 | 2015-11-25 | 耀强洛阳机械制造有限公司 | Casting method of heavy cast iron axle housing of rear axle of motor tricycle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6095692A (en) * | 1998-01-12 | 2000-08-01 | Nsk Ltd. | Rolling bearing |
| CN101012529A (en) * | 2007-01-24 | 2007-08-08 | 中国重型汽车集团有限公司 | Cast steel and method for preparing same |
| CN101660093A (en) * | 2009-09-04 | 2010-03-03 | 武汉钢铁(集团)公司 | Hot-rolling stamping axle housing steel for automobile with 510Mpa-grade tensile strength and preparation method thereof |
| CN102212755A (en) * | 2011-04-29 | 2011-10-12 | 山东蒙凌工程机械股份有限公司 | Low-alloy cast steel and application thereof in heavy lorry axle housing, raw materials and machining process |
| CN102876982A (en) * | 2011-07-14 | 2013-01-16 | 宝山钢铁股份有限公司 | Axle steel and its manufacturing method |
-
2013
- 2013-04-19 CN CN2013101396143A patent/CN103215510A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6095692A (en) * | 1998-01-12 | 2000-08-01 | Nsk Ltd. | Rolling bearing |
| CN101012529A (en) * | 2007-01-24 | 2007-08-08 | 中国重型汽车集团有限公司 | Cast steel and method for preparing same |
| CN101660093A (en) * | 2009-09-04 | 2010-03-03 | 武汉钢铁(集团)公司 | Hot-rolling stamping axle housing steel for automobile with 510Mpa-grade tensile strength and preparation method thereof |
| CN102212755A (en) * | 2011-04-29 | 2011-10-12 | 山东蒙凌工程机械股份有限公司 | Low-alloy cast steel and application thereof in heavy lorry axle housing, raw materials and machining process |
| CN102876982A (en) * | 2011-07-14 | 2013-01-16 | 宝山钢铁股份有限公司 | Axle steel and its manufacturing method |
Non-Patent Citations (1)
| Title |
|---|
| 韩至成: "《电磁冶金技术及装备500问》", 28 February 2010, article "第六章 中频感应炉熔炼的基本原理及其工艺技术" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081218A (en) * | 2015-08-21 | 2015-11-25 | 耀强洛阳机械制造有限公司 | Casting method of heavy cast iron axle housing of rear axle of motor tricycle |
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Application publication date: 20130724 |