CN103757447A - Method of improving fatigue of alloy - Google Patents
Method of improving fatigue of alloy Download PDFInfo
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- CN103757447A CN103757447A CN201310747408.0A CN201310747408A CN103757447A CN 103757447 A CN103757447 A CN 103757447A CN 201310747408 A CN201310747408 A CN 201310747408A CN 103757447 A CN103757447 A CN 103757447A
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Abstract
The invention discloses a method of improving fatigue of an alloy. The method comprises the following steps: controlling the contents of Fe and Si in the alloy, wherein Fe is less than 0.15% and Si is less than 0.12%; controlling the contents of Cu, Mn and Gr for reducing a crack source formed by infusible compounds as a base body; and replacing Mn and Cr by Zr and Ti to refine grains. The method disclosed by the invention has the beneficial effects that the crack source formed by infusible compounds as a base body in the alloy is reduced by controlling the contents of Cu, Mn, Gr, Fe and Si capable of easily forming the infusible compounds in alloy, so that the fatigue limit of the alloy is grealty improved.
Description
Technical field
The present invention relates to a kind of method that improves alloy fatigue degree, belong to metallurgical technology field.
Background technology
Alloy is the variation in the stress cycle of intercropping at any time of each point in the course of the work, and the periodically variable stress of this intercropping is at any time called repeated stress (also claiming pulsating stress).Under the effect of repeated stress, although the phenomenon that the stress that part bears, lower than the yield-point of material, cracks after the work of long period or generation is ruptured completely is suddenly called the fatigue of metal
Fatigue strength refers to metallic substance under repeated load effect infinitely repeatedly and non-destructive maximum stress is called fatigue strength or safe range of stress.In fact, metallic substance the impossible repeated load of doing infinitely are repeatedly tested.During ordinary test, stipulate, steel stands 8 repeated loads of 10 ˇ in stand 10 ˇ 7 times, non-iron (coloured) metallic substance and makes the maximum stress of used time while not producing fracture and be called fatigue strength.When the repeated stress applying is symmetry circulating stress, the fatigue strength Yong σ – 1 of gained represents.The many alloys in the course of the work stress intercropping at any time of each point periodically change, and the periodically variable stress of this intercropping is at any time called repeated stress (also claiming pulsating stress).Under the effect of repeated stress, although the phenomenon that the stress that part bears, lower than the yield-point of material, cracks after the work of long period or generation is ruptured completely is suddenly called the fatigue of metal.Fatigure failure is the one of the main reasons that mechanical component lost efficacy, and the fatigue damage of part is mainly present in high stress concentrations point, and generally, under repeated stress effect, material occurs to produce micro-crack after repeatedly viscous deformation.Therefore the fatigue strength that improves alloy material is necessary.
Summary of the invention
In order to overcome above-mentioned defect, the invention provides a kind of method that improves alloy fatigue degree.
To achieve these goals, technical scheme of the present invention is: a kind of method that improves alloy fatigue degree,
Control Fe, Si content in alloy, Fe<0.15%, Si<0.12%;
Control the content of Cu, Mn, Gr, be used for reducing and do not melt the source, crack that compound is matrix formation;
With Zr, Ti, replace Mn, Cr crystal grain thinning.
The invention has the beneficial effects as follows: by easy formation in control alloy, do not melt the content of compound Cu, Mn, Gr, Fe, Si, reduce in alloy and form not melt the formation of crack of compound as matrix, significantly improved the safe range of stress of alloy.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further.
Embodiment 1
Improve a method for alloy fatigue degree,
Control Fe, Si content in alloy, Fe 0.13%, Si 0.09%;
Control the content of Cu, Mn, Gr, be used for reducing and do not melt the source, crack that compound is matrix formation;
With Zr, Ti, replace Mn, Cr crystal grain thinning.
Embodiment 2
Improve a method for alloy fatigue degree,
Control Fe, Si content in alloy, Fe 0.10%, Si 0.10%;
Control the content of Cu, Mn, Gr, be used for reducing and do not melt the source, crack that compound is matrix formation;
With Zr, Ti, replace Mn, Cr crystal grain thinning.
Embodiment 3
Improve a method for alloy fatigue degree,
Control Fe, Si content in alloy, Fe 0.12%, Si 0.11%;
Control the content of Cu, Mn, Gr, be used for reducing and do not melt the source, crack that compound is matrix formation;
With Zr, Ti, replace Mn, Cr crystal grain thinning.
Technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, and the technology distortion that every technical scheme according to the present invention is made, within all falling into protection scope of the present invention.
Claims (1)
1. a method that improves alloy fatigue degree, is characterized in that:
Control Fe, Si content in alloy, Fe<0.15%, Si<0.12%;
Control the content of Cu, Mn, Gr, be used for reducing and do not melt the formation of crack that compound is matrix formation;
With Zr, Ti, replace Mn, Cr crystal grain thinning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747408.0A CN103757447A (en) | 2013-12-31 | 2013-12-31 | Method of improving fatigue of alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747408.0A CN103757447A (en) | 2013-12-31 | 2013-12-31 | Method of improving fatigue of alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103757447A true CN103757447A (en) | 2014-04-30 |
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| CN201310747408.0A Pending CN103757447A (en) | 2013-12-31 | 2013-12-31 | Method of improving fatigue of alloy |
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| CN (1) | CN103757447A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007326052A (en) * | 2006-06-08 | 2007-12-20 | Sumitomo Electric Ind Ltd | Method of manufacturing metal catalyst |
| CN101343705A (en) * | 2008-08-26 | 2009-01-14 | 沈阳铸造研究所 | Titanium alloy for high-rigidity cast and manufacturing method |
| CN103255303A (en) * | 2013-05-16 | 2013-08-21 | 焦作市圣昊铝业有限公司 | Manufacturing process of 7005 aluminum alloy |
-
2013
- 2013-12-31 CN CN201310747408.0A patent/CN103757447A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007326052A (en) * | 2006-06-08 | 2007-12-20 | Sumitomo Electric Ind Ltd | Method of manufacturing metal catalyst |
| CN101343705A (en) * | 2008-08-26 | 2009-01-14 | 沈阳铸造研究所 | Titanium alloy for high-rigidity cast and manufacturing method |
| CN103255303A (en) * | 2013-05-16 | 2013-08-21 | 焦作市圣昊铝业有限公司 | Manufacturing process of 7005 aluminum alloy |
Non-Patent Citations (3)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局中国国家标准化管理委员会: "变形铝及铝合金化学成分", 《中华人民共和国国家标准GB/T3190-2008》, 1 December 2008 (2008-12-01) * |
| 谭劲峰: "《轻有色金属及其合金熔炼与铸造》", 1 April 2013, article "7×××系" * |
| 贺永东等: "微量Cr、Mn、Ti、Zr细化7A55铝合金铸锭组织的效果与机理", 《中国有色金属学报》, vol. 15, no. 10, 31 October 2005 (2005-10-31) * |
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Application publication date: 20140430 |