CN1664156A - Method for enhancing performance of tungsten carbide base carbide alloy by liquid shot blasting - Google Patents
Method for enhancing performance of tungsten carbide base carbide alloy by liquid shot blasting Download PDFInfo
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- CN1664156A CN1664156A CN 200510013225 CN200510013225A CN1664156A CN 1664156 A CN1664156 A CN 1664156A CN 200510013225 CN200510013225 CN 200510013225 CN 200510013225 A CN200510013225 A CN 200510013225A CN 1664156 A CN1664156 A CN 1664156A
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Abstract
The invention relates to a method for improving the property of the haystellite by liquid peening, which comprises the following steps: smoothing the surface of the test sample, adjusting the art parameters of the liquid sand ejector: the jet pressure is 0.1-10 bar, the jet distance is 0-200mm, the jet minute is 0.01-30min, the abradant density (volume) is 1~25%, and the abradant weight is established according to the size of sand ejector; sandblasting the test sample by the liquid sand ejector; cleaning and drying it, then completing the blasting. Said invention makes the surface of the carbide alloy acquiring the compressive stress, and improves the property of the carbide alloy, which can be applied in practice as the best anneal process. The abradant floats in the liquid medium, and will be injected to the carbide alloy surface evenly and rapidly in the action of the compressed air, which will acquires the surface compressive stress and clean the workpiece at the same time.
Description
[technical field]: the present invention relates to the processing of carbamide tool material, particularly adopt the liquid blasting technology to improve the treatment process of performance of tungsten carbide base carbide alloy.
[background technology]: the status of carbamide tool material in each industrial circle becomes more and more important, and Wimet has the hardness height, wear resistance is good, Young's modulus is high and advantage such as acid-and base-resisting.But Wimet belongs to hard brittle material, and carbamide tool is often fragment and fracture easily in use.Thereby to intensity and the toughness that how to improve Wimet, the material scientific worker has carried out number of research projects both at home and abroad, and has obtained certain success.For example, by adding alloying element, change the structure of alloy, the refinement carbide grain is strengthened the bonding phase, improves the intensity and the toughness of Wimet; By thermal treatment, change the structure of bonding phase, the refinement carbide grain, thus improve the Wimet physical and mechanical properties; By the alloy manufacturing process of strictness, reduce the hole and the defective of alloy, improve carbamide tool quality or the like method.These methods mainly all are by changing the raising that bonding phase composition and alloy organizing structure reach alloy property.But a very important problem has been ignored in these researchs, be exactly residual stress to the Wimet Effect on Performance, especially in actual applications, unrelieved stress is to the carbamide tool influence in work-ing life.
Wimet is made up of refractory carbide (is representative with the wolfram varbide) and matrix metal (being mainly cobalt), and the thermal expansivity of cobalt phase is three times of wolfram varbide approximately, therefore when alloy from sintering temperature (about about 1400 ℃) when being cooled to room temperature, to produce sizable stress in the alloy, this stress is called residual stress (also claiming unrelieved stress) usually, it affects the performance of Hardmetal materials greatly, affects the work-ing life of carbamide tool in other words greatly.The former Russian scholar is thought: " residual compressive stress that produces certain value in the top layer improves its work-ing life when in use external load causes tensile stress greatly ".(referring to M. Γ. the Lip river picogram, the intensity of Wimet and life-span, metallurgical industry press, 1990:11-14).
At present improve the method for alloy property and mainly contain by changing the carbide surface stressed condition:
1. the gradient function method of design---Japan develops has the gradient function Wimet that presets compressive residual stress, the linear expansivity of their control surface is less than inside, difference by linear expansivity reaches the temperature head that is cooled to room temperature from sintering temperature, the unrelieved stress of compression is imported alloy surface, make alloy under specific machining condition, not produce thermal crack (referring to gloomy mouthful, elegant tree, the design of gradient function carbamide tool material, external refractory metal and mechanically resistant material, 1998,14 (2): 10-16).This method obtains application at present as yet because complex process is operated difficult control in actual production.
2. grind and the polishing method---with carbamide tool through grinding and physical process and strengthening and toughening treatment method such as polishing, the bending strength and the impelling strength of Wimet all are enhanced (referring to Yang Jinhui, improve the carbamide tool and the research in work-ing life, Hebei metallurgy, 1997,5:32-36).The stress that this method produces alloy surface is less than the dry type shot-peening, thereby effect is slightly poor.
3. dry type shot-peening method---the dry type shot peening is used for the passivation of indexable insert tip, throw away tip and the surface-conditioning of usual production always in the Wimet field, be not used to enhance product performance.Calendar year 2001, strain state cemented carbide works is studied dry type shot peening hard alloy process, and the product of processing is hard alloy spherical-teeth and top hammer, be improved work-ing life and (found the state the research of shot peening hard alloy process, Wimet referring to dragon, 2001,18 (2): 105-109).This method noise is big, needs to increase dedusting, ventilation installation investment, and there are deficiencies such as pollution in Working environment.
[summary of the invention]: the objective of the invention is to solve dry blasting method airborne dust in the aforesaid method, noise is big; Seriously polluted, workman's labor condition is poor; Do deficiencies such as spray process visibility is low, the test specimen shot-peening is of poor quality, provide a kind of liquid shot peening strengthening to improve the method for performance of tungsten carbide base carbide alloy.
Liquid shot peening strengthening provided by the invention improves the method for performance of tungsten carbide base carbide alloy, may further comprise the steps:
A, handle, make the sintered state tungsten carbide base carbide alloy obtain flat surface being carried out surfacing by spray tungsten carbide base carbide alloy test specimen;
B, liquid sandblast machine is carried out equipment debugging and processing parameter regulate, wherein liquid shot-blast process parameter is: spraying pressure 0.1-10bar, jet length 0-200mm, injecting time 0.01-30min;
C, abrasive concentration are regulated, according to:
Abrasive concentration (volume)=abrasive material volume sum/(abrasive material volume+liquid volume sum) * 100%
Carry out abrasive concentration and calculate, its value is: 1～25%, and the abrasive material total amount is determined according to the size of liquid sandblast machine.
D, adopt liquid sandblast machine,,,, implement liquid blasting and handle being moved spray gun according to required operating mode according to segmentation or subregion and reciprocation cycle by the spray test specimen with circulating liquid medium and abrasive material with compressed air;
E, cleaning and oven dry are by spray test specimen surface, and liquid blasting finishes.
Wherein: abrasive material can be glass ball or stainless shot; Pellet size is generally: 0.05～0.40mm; Abrasive concentration (volume) is good with 10～15%.
Circulating liquid medium can be ortho-water or be added with sanitas or the water of rust remover or oxidation inhibitor, or the mixed solution of their various ratios.
Advantage of the present invention and positively effect: the present invention has overcome conventional dry blasting method airborne dust, noise is big; Seriously polluted, workman's labor condition is poor; Do shortcomings such as spray process visibility is low, the test specimen shot-peening is of poor quality, realized making carbide surface to obtain stress, improve the Wimet performance, obtain can be applicable to actual best reinforcement toughening process.The present invention adopts the liquid blasting method, high efficiency, the shot-peening process visualization is good, the shot-peening Functionality, quality and appealing design, and effect is obvious, liquid medium is suspended in wherein abrasive material, under the pressurized air effect, evenly, obtain bearing stress at high speed with the surface of abrasive jet to the Wimet test specimen, cleaning ambient reduces noise simultaneously; Equipment is simple, saves dedusting, ventilation installation investment, and is with low cost; Working environment is pollution-free, and labour intensity is low.Be a kind of environmental protection, strengthen means efficiently, cheaply, good industrial application value is arranged.The effect of abrasive material is that carbide surface is realized high-speed impact, reduces the distance between the atom, makes all kinds of surface imperfection and microcrack up, and hinders microcrack growth and propagation, plays the crack arrest effect, thereby improves the performance of Wimet.Can obtain residual compressive stress on the tungsten carbide base carbide alloy surface by the liquid shot peening, and improve size, direction, the distribution of tungsten carbide base carbide alloy unrelieved stress, thereby improve alloy property, prolong the work-ing life of tungsten carbide base carbide alloy cutter.
[embodiment]:
Embodiment 1
Tungsten carbide base carbide alloy YG8 proof stick is handled:
A, handle being carried out surfacing by spray tungsten carbide base carbide alloy test specimen, as: grinding after annealing etc.; Make the sintered state tungsten carbide base carbide alloy obtain flat surface;
B, liquid sandblast machine is carried out equipment debugging and processing parameter regulate, liquid shot-blast process significant parameter is selected: spraying pressure 5bar, jet length 50mm, injecting time 2min;
C, carry out abrasive concentration according to: abrasive concentration (volume)=abrasive material volume sum/(abrasive material volume+liquid volume sum) * 100% and calculate, its value is: 1～25%;
D, employing liquid sandblast machine, with compressed air, liquid circulation, blasting media are materials such as glass ball, stainless shot, implement liquid blasting and handle being moved spray gun (is good with sectional ejecting liquid abrasive material) according to required operating mode according to segmentation or subregion and reciprocation cycle by the spray test specimen;
E, cleaning and oven dry are by spray test specimen surface, and liquid blasting finishes.
The effect of liquid medium is that abrasive material is suspended in wherein, under the pressurized air effect, evenly at high speed with the surface of abrasive jet to the Wimet test specimen, obtains bearing stress, and cleaning ambient reduces noise simultaneously.This liquid medium can be ortho-water or the water that adds additives such as sanitas, rust remover, oxidation inhibitor.
The effect of abrasive material is that carbide surface is realized high-speed impact, reduces the distance between the atom, makes all kinds of surface imperfection and microcrack up, and hinders microcrack growth and propagation, plays the crack arrest effect, thereby improves the performance of Wimet.This abrasive material can be materials such as glass ball, stainless shot, and pellet size is advisable with tiny.Present embodiment adopts glass ball, diameter 0.24mm.Liquid is water, and abrasive concentration (volume) is 15%, and abrasive material is no more than 1.5kg.Select liquid shot-blast process parameter to be: spraying pressure 5bar, jet length is 50mm, injecting time 2min; Segmentation is moved spray gun the liquid shot peening is implemented on the surface, cleans subsequently, dries, and obtains alloy surface residual stress 1070.83Mpa, and bending strength improves 204.7Mpa, and hardness HRA improves 0.58, and wear resistance improves 39%.
Embodiment 2
Tungsten carbide base carbide alloy YG8 proof stick is handled.Glass ball abrasive material with diameter 0.24mm places liquid medium water earlier, is that 10% pair of abrasive material carries out proportioning according to abrasive concentration (volume), and constantly checks abrasive concentration in the shot-peening process, and according to the unit type difference, abrasive material must not surpass 1.5kg; In equipment debugging, the shot-blast process parameter is carried out following adjustment:
Select liquid shot-blast process parameter to be: spraying pressure is 3bar, jet length 50mm, injecting time 2min; Segmentation is moved spray gun the liquid shot peening is implemented on the surface, cleans subsequently, dries, and obtains alloy surface residual stress 1023.60Mpa, and bending strength improves 93.1Mpa, and hardness HRA improves 0.33, and wear resistance improves 30%.
Embodiment 3
Tungsten carbide base carbide alloy YG8 proof stick is handled.The glass ball abrasive material of diameter 0.4mm is placed liquid medium water, is that 15% pair of abrasive material carries out proportioning according to abrasive concentration (volume), and constantly checks abrasive concentration in the shot-peening process, and abrasive material must not surpass 1.5kg; In equipment debugging, the shot-blast process parameter is carried out following adjustment:
Select liquid shot-blast process parameter to be: jet length 25mm, spraying pressure are 5bar, injecting time 0.5min; Segmentation is moved spray gun the liquid shot peening is implemented on the surface, cleans subsequently, dries, and obtains alloy surface residual stress 986.07Mpa, and bending strength improves 93.1Mpa, and hardness HRA improves 0.41, and wear resistance improves 8%.。
Embodiment 4
Tungsten carbide base carbide alloy YG8 proof stick is handled.The glass ball abrasive material of diameter 0.4mm is placed liquid medium water, is that 20% pair of abrasive material carries out proportioning according to abrasive concentration (volume), and constantly checks abrasive concentration in the shot-peening process, and abrasive material must not surpass 1.5kg; In equipment debugging, the shot-blast process parameter is carried out following adjustment:
Select liquid shot-blast process parameter to be: jet length 100mm, spraying pressure are 5bar, and injecting time is 4min; Segmentation is moved spray gun the liquid shot peening is implemented on the surface, cleans subsequently, dries, and obtains surperficial residual stress 1111.24Mpa, and bending strength improves 175.4Mpa, and hardness HRA improves 0.52, and wear resistance improves 44%.
Embodiment 5
Tungsten carbide base carbide alloy YG15 proof stick is handled.The abrasive material of diameter 0.24mm is placed liquid medium water, is that 15% pair of abrasive material carries out proportioning according to abrasive concentration (volume), and constantly checks abrasive concentration in the shot-peening process, and according to the unit type difference, abrasive material must not surpass 1.5kg; In equipment debugging, the shot-blast process parameter is carried out following adjustment:
Select liquid shot-blast process parameter to be: spraying pressure 5bar, jet length is 50mm, injecting time 2min; Segmentation is moved spray gun the liquid shot peening is implemented on the surface, cleans subsequently, dries, and obtains surperficial residual stress 989.261142.67Mpa, and bending strength improves 292.6Mpa, and hardness HRA improves 0.72, and wear resistance improves 51%.
Embodiment 6
Tungsten carbide base carbide alloy YG15 proof stick is handled.The glass ball abrasive material of diameter 0.4mm is placed liquid medium water, is that 10% pair of abrasive material carries out proportioning according to abrasive concentration (volume), and constantly checks abrasive concentration in the shot-peening process, and abrasive material must not surpass 1.5kg; In equipment debugging, the shot-blast process parameter is carried out following adjustment:
Select liquid shot-blast process parameter to be: jet length 100mm, spraying pressure are 5bar, injecting time 2min; Segmentation is moved spray gun the liquid shot peening is implemented on the surface, cleans subsequently, dries, and obtains surperficial residual stress 974.26Mpa, and bending strength improves 236.4Mpa, and hardness HRA improves 0.53, and wear resistance improves 40%.
Embodiment 7
Tungsten carbide base carbide alloy YG15 proof stick is handled.The glass ball abrasive material of diameter 0.24mm is placed liquid medium water, and abrasive concentration (volume) is that 15% pair of abrasive material carries out proportioning, and constantly checks abrasive concentration in the shot-peening process, and abrasive material must not surpass 1.5kg; In equipment debugging, the shot-blast process parameter is carried out following adjustment:
Select liquid shot-blast process parameter to be: jet length 50mm, spraying pressure is 3bar, injecting time is respectively 2min; Segmentation is moved spray gun the liquid shot peening is implemented on the surface, cleans subsequently, dries, and obtains surperficial residual stress 814.19Mpa, and bending strength improves 136.9Mpa, and hardness HRA improves 0.54, and wear resistance improves 33%.
Embodiment 8
Present embodiment adopts stainless shot, diameter 0.1mm.Abrasive concentration (volume) is 5%.Select liquid shot-blast process parameter to be: spraying pressure 5bar, jet length is 0.5mm, injecting time 10min; Treating processes is with embodiment 1.
Claims (3)
1, a kind of liquid shot peening strengthening improves the method for performance of tungsten carbide base carbide alloy, it is characterized in that this method may further comprise the steps:
A, handle, make the sintered state tungsten carbide base carbide alloy obtain flat surface being carried out surfacing by spray tungsten carbide base carbide alloy test specimen;
B, liquid sandblast machine is carried out equipment debugging and processing parameter regulate, wherein liquid shot-blast process parameter is: spraying pressure 0.1-10bar, jet length 0-200mm, injecting time 0.01-30min;
C, abrasive concentration are regulated, according to:
Abrasive concentration (volume)=abrasive material volume sum/(abrasive material volume+liquid volume sum) * 100%
Carry out abrasive concentration and calculate, its value is: 1～25%;
D, adopt liquid sandblast machine,,,, implement liquid blasting and handle being moved spray gun according to required operating mode according to segmentation or subregion and reciprocation cycle by the spray test specimen with circulating liquid medium and abrasive material with compressed air;
E, cleaning and oven dry are by spray test specimen surface, and liquid blasting finishes.
2, liquid shot peening strengthening according to claim 1 improves the method for performance of tungsten carbide base carbide alloy, and it is characterized in that: abrasive material can be glass ball or stainless shot; Pellet size is generally: 0.05～0.40mm; Abrasive concentration (volume) is good with 10～15%.
3, according to the method for claim 1 or 2, it is characterized in that circulating liquid medium can be ortho-water or be added with sanitas or the water of rust remover or oxidation inhibitor, or the mixed solution of their various ratios.
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| CN100445009C (en) * | 2006-12-06 | 2008-12-24 | 贵州永红航空机械有限责任公司 | Novel process for improving vacuum welding quality of aluminum alloy |
| CN102266858A (en) * | 2011-07-12 | 2011-12-07 | 河南恒安电力科技实业有限公司 | Gas-liquid mixed sandblasting insulation method for cleaning high-voltage electrified insulator |
| CN102642177A (en) * | 2012-05-04 | 2012-08-22 | 大连理工大学 | Processing method of alloy surface micro-cracks |
| CN102690935A (en) * | 2012-06-20 | 2012-09-26 | 北京飞机维修工程有限公司 | Manufacturing method of shot peening strengthened tungsten carbide rotary sheet |
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| CN111687755A (en) * | 2019-03-13 | 2020-09-22 | 加特可株式会社 | Method for setting shot blasting conditions |
| CN113005381A (en) * | 2021-02-09 | 2021-06-22 | 昆明理工大学 | Surface treatment method for tungsten carbide-based hard alloy |
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| CN100445009C (en) * | 2006-12-06 | 2008-12-24 | 贵州永红航空机械有限责任公司 | Novel process for improving vacuum welding quality of aluminum alloy |
| CN102266858A (en) * | 2011-07-12 | 2011-12-07 | 河南恒安电力科技实业有限公司 | Gas-liquid mixed sandblasting insulation method for cleaning high-voltage electrified insulator |
| CN102266858B (en) * | 2011-07-12 | 2012-12-19 | 河南恒安电力科技实业有限公司 | Gas-liquid mixed sandblasting insulation method for cleaning high-voltage electrified insulator |
| CN102642177A (en) * | 2012-05-04 | 2012-08-22 | 大连理工大学 | Processing method of alloy surface micro-cracks |
| CN102690935A (en) * | 2012-06-20 | 2012-09-26 | 北京飞机维修工程有限公司 | Manufacturing method of shot peening strengthened tungsten carbide rotary sheet |
| CN103692360A (en) * | 2013-11-14 | 2014-04-02 | 常州蓝翼飞机装备制造有限公司 | Sand blasting process of aviation fire-extinguishing bottle dome |
| CN103692360B (en) * | 2013-11-14 | 2016-05-18 | 常州蓝翼飞机装备制造有限公司 | The blasting craft of aviation fire-suppression bottle end socket |
| CN105039958A (en) * | 2015-07-13 | 2015-11-11 | 西安航天动力测控技术研究所 | Technique for improving color uniformity of alloy steel bluing coating effectively |
| CN106272096A (en) * | 2016-10-21 | 2017-01-04 | 贵州大学 | A kind of mild steel part carburizing rear surface intensifying method |
| CN106272096B (en) * | 2016-10-21 | 2018-10-12 | 贵州大学 | A kind of low-carbon steel part carburizing rear surface intensifying method |
| CN111687755A (en) * | 2019-03-13 | 2020-09-22 | 加特可株式会社 | Method for setting shot blasting conditions |
| CN110607427A (en) * | 2019-08-28 | 2019-12-24 | 株洲硬质合金集团有限公司 | Hard alloy six-side anvil and preparation method thereof |
| CN110607427B (en) * | 2019-08-28 | 2021-07-06 | 株洲硬质合金集团有限公司 | Hard alloy six-side anvil and preparation method thereof |
| CN113005381A (en) * | 2021-02-09 | 2021-06-22 | 昆明理工大学 | Surface treatment method for tungsten carbide-based hard alloy |
| CN113005381B (en) * | 2021-02-09 | 2022-03-18 | 昆明理工大学 | Surface treatment method for tungsten carbide-based hard alloy |
| CN114633218A (en) * | 2022-03-04 | 2022-06-17 | 贵州捷盛钻具股份有限公司 | Surface treatment method and surface treatment device for drill rod and drill rod manufacturing method |
| CN114633218B (en) * | 2022-03-04 | 2023-09-19 | 贵州捷盛钻具股份有限公司 | Surface treatment method and device for drill rod and drill rod manufacturing method |
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