CN101020946A - Composite shot blasting reinforcement process to raise fatigue strength of titanium metal - Google Patents
Composite shot blasting reinforcement process to raise fatigue strength of titanium metal Download PDFInfo
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- CN101020946A CN101020946A CNA2007100104532A CN200710010453A CN101020946A CN 101020946 A CN101020946 A CN 101020946A CN A2007100104532 A CNA2007100104532 A CN A2007100104532A CN 200710010453 A CN200710010453 A CN 200710010453A CN 101020946 A CN101020946 A CN 101020946A
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- shot
- peening
- fatigue strength
- shot blasting
- titanium metal
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Abstract
The composite shot blasting reinforcement process to raise the fatigue strength of titanium metal includes one step of eliminating surface attachment and dirt, and one high-energy shot blasting step for surface nanometer treatment and secondary fining treatment. The process can obtain one nanometer surface layer in certain depth and one very deep residual compressive stress field and raise the fatigue strength of the material.
Description
Technical field
The present invention relates to relate in particular to the shot peening of the titanium material being implemented with the mode of clashing into continuously for producing the abrasive blasting method of special-effect.
Background technology
Titanium and alloy thereof have high specific tenacity, good solidity to corrosion and good high-temperature performance, occupy more and more important position in modern aerospace, war industry and civilian industry.But because the fatigue strength of titanium and alloy self thereof is low, dispersed big, shortcomings such as wear resisting property difference have limited its further application in industry greatly.Though developed the process for modifying surface of multiple physics and chemistry now, can improve the wear resisting property of titanium and alloy thereof effectively, these methods nearly all make its fatigue strength reduce on the contrary.
Shot-peening and roll extrusion are the raising titanium and the alloy fatigue degree methods thereof of generally acknowledging, existing at present a large amount of research, but its strengthening effect is all not obvious.Comparatively speaking, shot-peening effect is better relatively, also only makes the general raising about 20% of safe range of stress of industrially pure titanium, far below the strengthening effect of shot-peening to general material.And the effect of the safe range of stress of finish rolling hardening raising industrially pure titanium is smaller, is starkly lower than its strengthening effect to general material.
Summary of the invention
Proposition of the present invention is intended to the processing method by composite shot blasting, improves the fatigue strength of titanium metal.Technical solution of the present invention is achieved in that
A kind of method of utilizing composite shot blasting reinforcement to improve titanium metal fatigue strength, it is characterized in that technological process divides two steps: the first step, high energy bead blasted surfaces nanometer is handled, the shot-blast process parameter is: blasting media is selected the steel alloy bullet of 1.0mm～ 2.0mm for use, shot-peening speed is 45m/s～55m/s, and the shot-peening time is 60min～360min; Second step, secondary refinement shot-peening, processing parameter is: blasting media is used the bullet of 0.3mm～ 0.6mm instead, and shot-peening speed still adopts 45m/s～55m/s, shorter 10min～30min of shot-peening time.
Compared with prior art, composite shot blasting reinforcement of the present invention can make the safe range of stress of industrially pure titanium improve more than 50%, far above the influence of other reinforcing process to the industrially pure titanium fatigue property.This technology required equipment is simple, and technological process is easy to operate, only needs to get final product by changing blasting media, shot-peening energy (speed) and shot-peening time on shot-peening commonly used or shot-blast apparatus.This technology is applicable to the multiple plastic metal material that comprises titanium metal.
Description of drawings
Accompanying drawing 1 width of cloth of the present invention is shown in Fig. 1.
Fig. 1 is a process flow diagram of the present invention.
Embodiment
A kind of method of utilizing composite shot blasting reinforcement to improve titanium metal fatigue strength, this method is handled by the high energy shot peening strengthening, can form the nanometer top layer of certain depth on the surface of material, and produces very high, very dark residual compressive stress field on the top layer; Then, by secondary refinement shot-peening can reduce the nanometer top layer roughness, repair the surface damage that causes because of violent viscous deformation and make the top layer tiny crack up, suppressing crackle produces on the surface, the premium properties on nanometer top layer is not fully exerted, thereby the fatigue strength of material is improved by nanometer top layer premium properties and higher residual compressive stress.
Specific embodiment comprises:
1, cleaning surface
Cleaning is by the dirts such as surface attachments of shot-peening part;
2, high energy bead blasted surfaces nanometer is handled
(a) blasting media is the alloy steel bomb bullet of 1.0mm～ 2.0mm;
(b) shot-peening speed is 45m/s～55m/s;
(c) the shot-peening time is 60min～360min;
3, secondary refinement shot-peening
(a) blasting media is the alloy balls of 0.3mm～ 0.6mm;
(b) shot-peening speed is 45m/s～55m/s;
(c) the shot-peening time is 10min～30min.
Claims (1)
1, a kind of method of utilizing composite shot blasting reinforcement to improve titanium metal fatigue strength is characterized in that the process of this method comprises the steps:
(1) remove by the surface attachments of shot-peening part and dirt on cleaning surface;
(2) Surface Nanocrystalline of high energy shot-peening, its processing condition are:
(a) blasting media is the steel alloy bullet of 1.0mm～ 2.0mm;
(b) shot-peening speed is 45m/s～55m/s;
(c) the shot-peening time is 60min～360min;
(3) secondary refinement shot-peening
(a) blasting media is the steel alloy bullet of 0.3mm～ 0.6mm;
(b) shot-peening speed is 45m/s～55m/s;
(c) the shot-peening time is 10min～30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100104532A CN101020946A (en) | 2007-02-14 | 2007-02-14 | Composite shot blasting reinforcement process to raise fatigue strength of titanium metal |
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| CNA2007100104532A CN101020946A (en) | 2007-02-14 | 2007-02-14 | Composite shot blasting reinforcement process to raise fatigue strength of titanium metal |
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| CN101020946A true CN101020946A (en) | 2007-08-22 |
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| CNA2007100104532A Pending CN101020946A (en) | 2007-02-14 | 2007-02-14 | Composite shot blasting reinforcement process to raise fatigue strength of titanium metal |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962706A (en) * | 2010-10-08 | 2011-02-02 | 中国航空工业集团公司北京航空材料研究院 | Compound strengthening method of small hole in ultrahigh strength steel part |
| CN102433421A (en) * | 2011-12-15 | 2012-05-02 | 比亚迪股份有限公司 | Amorphous alloy surface treatment process |
| CN102505068A (en) * | 2011-09-30 | 2012-06-20 | 上海交通大学 | Method for improving surface performance of titanium-based composite material by pre-stress shot blasting |
| CN103422098A (en) * | 2013-07-08 | 2013-12-04 | 江苏大学 | Modification method for improving surface nano indentation property of material |
| CN103834887A (en) * | 2014-03-05 | 2014-06-04 | 大连交通大学 | Method of nano-crystallizing heat engine compound process for improving fatigue strength of titanium alloy |
| CN104630678A (en) * | 2015-01-30 | 2015-05-20 | 西北工业大学 | Preparation method of TC4 titanium alloy surface nanostructure |
| CN104630677A (en) * | 2015-01-30 | 2015-05-20 | 西北工业大学 | TC17 titanium alloy surface treatment method |
| CN104674231A (en) * | 2013-11-29 | 2015-06-03 | 北京有色金属研究总院 | Aluminum alloy and surface reinforcing method of composite material of aluminum alloy |
| CN105132654A (en) * | 2015-08-31 | 2015-12-09 | 中国航空工业集团公司北京航空材料研究院 | Shot peening method for improving surface roughness of ultrahigh-strength steel parts |
| CN108179258A (en) * | 2017-11-27 | 2018-06-19 | 江阴市永兴机械制造有限公司 | A kind of gear teeth face shot peening strengthening finely finishing method |
| CN108707850A (en) * | 2018-06-11 | 2018-10-26 | 张家港华裕有色金属材料有限公司 | A method of improving the fatigue strength of the TA18 pipes of hydraulic air pipeline |
| CN112011674A (en) * | 2020-08-28 | 2020-12-01 | 东风商用车有限公司 | Composite shot blasting strengthening method for steel plate spring |
| CN115612955A (en) * | 2022-10-24 | 2023-01-17 | 四川大学 | Recrystallized high-toughness ultrafine-grained pure titanium and preparation method thereof |
| CN115928081A (en) * | 2022-12-06 | 2023-04-07 | 恩格尔注塑机械（常州）有限公司 | Surface composite strengthening processing method for injection molding machine pull rod |
-
2007
- 2007-02-14 CN CNA2007100104532A patent/CN101020946A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962706B (en) * | 2010-10-08 | 2012-04-18 | 中国航空工业集团公司北京航空材料研究院 | Compound strengthening method of small hole in ultrahigh strength steel part |
| CN101962706A (en) * | 2010-10-08 | 2011-02-02 | 中国航空工业集团公司北京航空材料研究院 | Compound strengthening method of small hole in ultrahigh strength steel part |
| CN102505068A (en) * | 2011-09-30 | 2012-06-20 | 上海交通大学 | Method for improving surface performance of titanium-based composite material by pre-stress shot blasting |
| CN102433421A (en) * | 2011-12-15 | 2012-05-02 | 比亚迪股份有限公司 | Amorphous alloy surface treatment process |
| CN103422098A (en) * | 2013-07-08 | 2013-12-04 | 江苏大学 | Modification method for improving surface nano indentation property of material |
| CN103422098B (en) * | 2013-07-08 | 2016-08-10 | 江苏大学 | A kind of method of modifying improving material surface nano property |
| CN104674231A (en) * | 2013-11-29 | 2015-06-03 | 北京有色金属研究总院 | Aluminum alloy and surface reinforcing method of composite material of aluminum alloy |
| CN104674231B (en) * | 2013-11-29 | 2018-04-27 | 北京有色金属研究总院 | The surface reinforcing method of aluminium alloy and its composite material |
| CN103834887B (en) * | 2014-03-05 | 2016-05-25 | 大连交通大学 | Improve the method for the heat engine combination process nanometer of titanium alloy fatigue strength |
| CN103834887A (en) * | 2014-03-05 | 2014-06-04 | 大连交通大学 | Method of nano-crystallizing heat engine compound process for improving fatigue strength of titanium alloy |
| CN104630677A (en) * | 2015-01-30 | 2015-05-20 | 西北工业大学 | TC17 titanium alloy surface treatment method |
| CN104630678A (en) * | 2015-01-30 | 2015-05-20 | 西北工业大学 | Preparation method of TC4 titanium alloy surface nanostructure |
| CN104630677B (en) * | 2015-01-30 | 2016-08-24 | 西北工业大学 | TC17 surface treatment method of titanium alloy |
| CN104630678B (en) * | 2015-01-30 | 2017-01-11 | 西北工业大学 | Preparation method of TC4 titanium alloy surface nanostructure |
| CN105132654A (en) * | 2015-08-31 | 2015-12-09 | 中国航空工业集团公司北京航空材料研究院 | Shot peening method for improving surface roughness of ultrahigh-strength steel parts |
| CN108179258A (en) * | 2017-11-27 | 2018-06-19 | 江阴市永兴机械制造有限公司 | A kind of gear teeth face shot peening strengthening finely finishing method |
| CN108707850A (en) * | 2018-06-11 | 2018-10-26 | 张家港华裕有色金属材料有限公司 | A method of improving the fatigue strength of the TA18 pipes of hydraulic air pipeline |
| CN112011674A (en) * | 2020-08-28 | 2020-12-01 | 东风商用车有限公司 | Composite shot blasting strengthening method for steel plate spring |
| CN115612955A (en) * | 2022-10-24 | 2023-01-17 | 四川大学 | Recrystallized high-toughness ultrafine-grained pure titanium and preparation method thereof |
| CN115928081A (en) * | 2022-12-06 | 2023-04-07 | 恩格尔注塑机械（常州）有限公司 | Surface composite strengthening processing method for injection molding machine pull rod |
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