CN103868813B - The method of stripe Surface Texture and raising material wear resistance thereof - Google Patents
The method of stripe Surface Texture and raising material wear resistance thereof Download PDFInfo
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Abstract
The method of <b> stripe Surface Texture and raising material wear resistance thereof.The most basic demand that common mechanical part should meet is good wearing quality and the friction factor that effectively can realize set motion.Reduce wear the normal method adopting raising material surface precision.A kind of </b><bGreatT.Gre aT.GT stripe Surface Texture </b><bGreatT.Gre aT.GT, the component units of the stripe Surface Texture described in </b><bGreatT.Gre aT.GT is width is </b><bGreatT.Gre aT.GT0.2mm</b><b > striped groove, described striped groove is distributed in the friction pair surface in contact of workpiece, the </b><bGreatT.Gre aT.GT inclination angle of described striped groove is </b><bGreatT.Gre aT.GT0</b><bGrea tT.GreaT.GT ° of </b><bGreatT.Gre aT.GT ~ 90</b><bGreatT.G reaT.GT °, described inclination angle is the angle in stripe direction and specimen width direction, the </b><bGreatT.Gre aT.GT degree of depth of the striped groove described in </b><bGreatT.Gre aT.GT is </b><bGreatT.Gre aT.GT0.1mm ~ 0.4mm</b><bGreat T.GreaT.GT, the described degree of depth is the degree of depth on stripe microstructure insert material surface, the </b><bGreatT.Gre aT.GT back gauge of the striped groove described in </b><bGreatT.Gre aT.GT is </b><bGreatT.Gre aT.GT0.2mm ~ 0.8mm</b><bGreat T.GreaT.GT, described back gauge is the distance of adjacent two stripe edge.The present invention is for improving material wear resistance.</b>
Description
technical field:
the present invention relates to a kind of method of stripe Surface Texture and raising material wear resistance thereof.
background technology:
mechanical motion certainly leads to friction, and wearing and tearing are products of mechanism friction motion.The most basic demand that common mechanical part should meet is good wearing quality and the friction factor that effectively can realize set motion.Reduce wear the normal method adopting raising material surface precision.The impact of wearing and tearing owing to being subject to material character and machining precision is reduced by improving surface accuracy, the raising of surface accuracy is restricted always, and for complex profile such as picture turbine blade, gear tooth etc., improve wearing quality by improving machining precision merely, very difficult especially.And precision and cost exponentially relation increase progressively, cost certainly will be caused to increase.The bionic raising material surface wear resistance that develops into provides new thinking, there are some researches show that Surface Texture that is dissimilar, size has and has reduced wear, improved the effect of the tribological property of friction pair.
summary of the invention:
the object of this invention is to provide a kind of method of stripe Surface Texture and raising material wear resistance thereof, by optimizing stripe Surface Texture parameter to improve material surface wear resistance and wear stability energy, realize the Optimum Matching of material friction performance and Surface Texture form.
above-mentioned object is realized by following technical scheme:
a kind of stripe Surface Texture, the component units of described stripe Surface Texture is width is 0.2mm striped groove, described striped groove is distributed in the friction pair surface in contact of workpiece, the inclination angle of described striped groove is 0 ° ~ 90 °, described inclination angle is the angle in stripe direction and specimen width direction, the degree of depth of described striped groove is 0.1mm ~ 0.4mm, the described degree of depth is the degree of depth on stripe microstructure insert material surface, the back gauge of described striped groove is 0.2mm ~ 0.8mm, and described back gauge is the distance of adjacent two stripe edge.
a kind of method improving material wear resistance about stripe Surface Texture as claimed in claim 1, smooth surface and micro-structure surface is adopted to carry out frictional experiment respectively, in experimentation, experiment load is 1N, adopt the contact reciprocating of some face, relative velocity is 0.02m/s, adopts the test of Three factors four horizontal quadrature, with stripe angle, back gauge and fringe depths for factor; Analyze stripe microstructure to the impact of material friction performance, analyze the Changing Pattern of above factor and material friction wear properties further, the tribological property of research different surfaces parameter striped microstructure, optimizing surface parameter;
specifically comprise the steps: first, the tribological property of point of application face contact dry friction measuring material, the friction factor of material is collected automatically by the data acquisition system (DAS) of testing machine;
secondly, capturing material surface abrasion depth data, uses washes of absolute alcohol test specimen, dries up, and calculates its wearing depth; Wearing depth adopts the method calculating wear surface and non-wear surface average height difference to obtain.The altitude information in test specimen cross section, adopts super depth of field digit microscope to measure;
finally, according to test findings, utilize MATLAB software, adopt least square method and F method of inspection to carry out friction factor and average wearing depth regretional analysis, obtain the Changing Pattern of each factor and material friction coefficient and wearing depth, choose optimum anti-attrition and increase resistance surface parameter.
described described stripe Surface Texture improves the method for material wear resistance, described stripe Surface Texture is under dry condition, serve the effect of catching abrasive dust, improve material wear resistance, alleviate the three-body-abrasion that the abrasion particles such as abrasive dust cause, according to test specimen friction factor time history data, smooth specimen reaches the stable wearing and tearing time used and is about 400s, the microstructure test specimen time used is only 25% of smooth specimen, the amplitude of variation of smooth specimen friction factor when stable wearing and tearing is also far longer than microstructure test specimen, illustrate that the wear process stability of striped microstructure is better than smooth surface.
beneficial effect:
1. stripe microstructure of the present invention can effectively promote material surface wear resistance, and there are some researches show that surface is not more smooth more wear-resisting, the surface with certain Non-smooth surface form has better resistance to abrasion on the contrary.According to orthogonal experiments, under DRY SLIDING, surface topography parameters is 0 °, inclination angle, and the stripe micro-structure surface average abrasion degree of depth of back gauge 0.2mm, degree of depth 0.1mm is only 2.1% of smooth surface.In addition, stripe texture friction process stability is better than smooth surface, stripe texture can make friction pair enter stable state of wear fast, smooth specimen reaches the stable wearing and tearing time used and is about 400s, striped microstructure test specimen reaches stable wearing and tearing time average used and is about 100s, is only 25% of the smooth specimen time used.And during the stable wearing and tearing of stripe microstructure test specimen friction factor amplitude of variation much smaller than smooth specimen.Data are seen from every side, and striped fine structure material friction and wear behavior is far superior to smooth surface material, and stripe micro-structure surface can meet the requirement of the better wear resistance of mechanical material and suitable friction coefficient.
2. striped microstructure inclination angle of the present invention is the important parameter determining material surface wearing depth, electric spark machine is processed to form sclerosis metamorphic layer and enhances striped groove surfaces, the groove of these strengthenings can tackle the expansion extension of surface crack, effectively improves material wear resistance.Inclination angle is less, striped and frictional direction angle larger, interception result is more remarkable.Inclination angle is that the stripe texture of 0 ° effect of resistance to wearing is best, and its average abrasion degree of depth is only 6.9% of the 90 ° of stripe textures in inclination angle.Adopt least square method and F method of inspection, draw wearing depth regression model.According to wearing depth regression model, in above factor, inclination angle has the greatest impact to wearing depth.In addition, the relative motion of inclination angle to friction pair of striped has certain inhibition, affect the size of friction factor, inclination angle is the stripe texture friction factor 0.42 of 0 °, inclination angle is the stripe texture friction factor of 90 ° is the former 50%, inclination angle is less, striped and frictional direction larger, friction factor is relatively large.
3. striped depth of microstructure of the present invention is the important indicator of material friction performance, and microstructure has carried out rule reforming to material surface pattern, changes surface of friction pair contact condition, friction factor is produced to the impact of can not ignore.The degree of depth is the friction factor 0.14 of 0.1mm microstructure, and the degree of depth is the friction factor of 0.4mm stripe texture is 0.42, is the former 3 times, and from experiment the data obtained, the striated surface texture degree of depth is larger, and the friction factor coefficient of material is larger.Adopt least square method and F method of inspection, draw friction factor regression model, in above factor, the degree of depth has the greatest impact to friction factor.Meanwhile, the existence of striped groove serves the effect holding abrasive dust, alleviating the wearing and tearing of friction pair to a certain extent, serving vital role to improving material surface wear resistance.The degree of depth is the stripe texture average abrasion degree of depth 7.6 μm of 0.1mm, is only 27% of the degree of depth 0.4mm texture average abrasion degree of depth.
4. back gauge of the present invention is the distance of adjacent two stripe edge, affects the density of striped microstructure, is the factor that investigation striped microstructure tribological properties be can not ignore.The existence of groove serves the effect holding abrasive dust, and the density of groove then affects the ability of recess catches abrasion particle, and then changes the three-body-abrasion state of abrasive particle and friction pair, affects stable friction performance and wear resistance.According to orthogonal test and analyze known, the stripe shape microstructure average abrasion degree of depth 7.6 μm of back gauge 0.2mm, is only 6.9% of back gauge 0.8mm stripe texture.Wearing depth increases with the increase of back gauge.The striped microstructure friction factor of back gauge 0.2mm is 0.14, back gauge 0.8mm texture friction factor is its 3 times.The increase of the friction coefficient back gauge and increasing.
5. stripe texture of the present invention substantially improves the tribological properties of material, impels friction pair to enter stable wear process fast, improves wear process stability, Be very effective in anti-attrition.Wearing depth along with inclination angle and back gauge increase and increase, reduce with the increase of the degree of depth.The increase of the friction coefficient depth of microstructure, back gauge and increasing, reduces along with the increase at inclination angle.There is optimum combination and obtain the best and to resistance to wear effect and meet the friction factor of movement needs in the degree of depth of striped microstructure, back gauge, three, inclination angle parameter.
accompanying drawing illustrates:
the schematic diagram that accompanying drawing 1 is stripe Surface Texture inclination angle of the present invention when being 0 °.
the schematic diagram that accompanying drawing 2 is stripe Surface Texture inclination angles of the present invention when being 30 °.
the schematic diagram that accompanying drawing 3 is stripe Surface Texture inclination angles of the present invention when being 60 °.
the schematic diagram that accompanying drawing 4 is stripe Surface Texture inclination angles of the present invention when being 90 °.
embodiment:
embodiment 1:
a kind of stripe Surface Texture, the component units of described stripe Surface Texture is width is 0.2mm striped groove, described striped groove is distributed in the friction pair surface in contact of workpiece, the inclination angle of described striped groove is 0 ° ~ 90 °, described inclination angle is the angle in stripe direction and specimen width direction, the degree of depth of described striped groove is 0.1mm ~ 0.4mm, the described degree of depth is the degree of depth on stripe microstructure insert material surface, the back gauge of described striped groove is 0.2mm ~ 0.8mm, and described back gauge is the distance of adjacent two stripe edge.
described inclination angle is 0 ° ~ 90 °; Inclination angle is the important parameter affecting material wear resistance, the hard layer that electric spark machine is processed to form enhances striped groove, the expansion can tackling surface crack extends, inclination angle is excessive, stripe direction and friction pair direction of relative movement angle too small, interception result is not obvious, and wear resistance is not good; Inclination angle is too small, stripe texture and friction pair direction of relative movement angle excessive, correspondingly increase friction factor, therefore the selection at inclination angle should obtain suitable friction coefficient in the excellent wear resistance situation of guarantee.The described degree of depth is 0.1mm ~ 0.4mm, and the degree of depth is too small, and it is more weak that striped groove holds abrasion particle ability, and wear resistance declines; The degree of depth is excessive, and surface smoothness is less, and be equivalent to roughness and increase, friction factor rises, and under guarantee meets friction factor requirement situation, should control stripe depth of microstructure unsuitable too small.Described back gauge is 0.2mm ~ 0.8mm, and back gauge is excessive, and striped flute density is less, and it is more weak to catch abrasion particle ability, and wear resistance is poor; Back gauge is too small, and surfaceness is relatively large, and friction factor rises; Meeting in friction factor requirement situation, less back gauge should be selected to improve wear resistance.
embodiment 2:
a kind of method improving material wear resistance about stripe Surface Texture as claimed in claim 1, smooth surface and micro-structure surface is adopted to carry out frictional experiment respectively, in experimentation, experiment load is 1N, adopt the contact reciprocating of some face, relative velocity is 0.02m/s, adopts the test of Three factors four horizontal quadrature, with stripe angle, back gauge and fringe depths for factor; Analyze stripe microstructure to the impact of material friction performance, analyze the Changing Pattern of above factor and material friction wear properties further, the tribological property of research different surfaces parameter striped microstructure, optimizing surface parameter;
specifically comprise the steps: first, the tribological property of point of application face contact dry friction measuring material, the friction factor of material is collected automatically by the data acquisition system (DAS) of testing machine;
secondly, capturing material surface abrasion depth data, uses washes of absolute alcohol test specimen, dries up, and calculates its wearing depth; Wearing depth adopts the method calculating wear surface and non-wear surface average height difference to obtain.The altitude information in test specimen cross section, adopts super depth of field digit microscope to measure;
finally, according to test findings, utilize MATLAB software, adopt least square method and F method of inspection to carry out friction factor and average wearing depth regretional analysis, obtain the Changing Pattern of each factor and material friction coefficient and wearing depth, choose optimum anti-attrition and increase resistance surface parameter.
embodiment 3:
stripe Surface Texture described according to embodiment 2 improves the method for material wear resistance, described stripe Surface Texture is under dry condition, serve the effect of catching abrasive dust, improve material wear resistance, alleviate the three-body-abrasion that the abrasion particles such as abrasive dust cause, according to test specimen friction factor time history data, smooth specimen reaches the stable wearing and tearing time used and is about 400s, the microstructure test specimen time used is only 25% of smooth specimen, the amplitude of variation of smooth specimen friction factor when stable wearing and tearing is also far longer than microstructure test specimen, illustrate that the wear process stability of striped microstructure is better than smooth surface.
Claims (2)
1.
a kind of stripe Surface Texture improves the method for material wear resistance, it is characterized in that: the component units of described stripe Surface Texture is width is 0.2mm striped groove, described striped groove is distributed in the friction pair surface in contact of workpiece, the inclination angle of described striped groove is 0 ° ~ 90 °, described inclination angle is the angle in stripe direction and specimen width direction, the degree of depth of described striped groove is 0.1mm ~ 0.4mm, the described degree of depth is the degree of depth on stripe microstructure insert material surface, the back gauge of described striped groove is 0.2mm ~ 0.8mm, described back gauge is the distance of adjacent two stripe edge, smooth surface and described stripe Surface Texture surface is adopted to carry out frictional experiment respectively, in experimentation, experiment load is 1N, adopt the contact reciprocating of some face, relative velocity is 0.02m/s, adopt the test of Three factors four horizontal quadrature, with stripe angle, back gauge and fringe depths for factor, analyze stripe microstructure to the impact of material friction performance, analyze the Changing Pattern of above factor and material friction wear properties further, the tribological property of research different surfaces parameter striped microstructure, optimizing surface parameter,
specifically comprise the steps: first, the tribological property of point of application face contact dry friction measuring material, the friction factor of material is collected automatically by the data acquisition system (DAS) of testing machine;
secondly, capturing material surface abrasion depth data, uses washes of absolute alcohol test specimen, dries up, and calculates its wearing depth; Wearing depth adopts the method calculating wear surface and non-wear surface average height difference to obtain, and the altitude information in test specimen cross section, adopts super depth of field digit microscope to measure;
finally, according to test findings, utilize MATLAB software, adopt least square method and F method of inspection to carry out friction factor and average wearing depth regretional analysis, obtain the Changing Pattern of each factor and material friction coefficient and wearing depth, choose optimum anti-attrition and increase resistance surface parameter.
2.
stripe Surface Texture according to claim 1 improves the method for material wear resistance, it is characterized in that: described stripe Surface Texture is under dry condition, serve the effect of catching abrasive dust, improve material wear resistance, alleviate the three-body-abrasion that the abrasion particles such as abrasive dust cause, according to test specimen friction factor time history data, smooth specimen reaches the stable wearing and tearing time used and is about 400s, the microstructure test specimen time used is only 25% of smooth specimen, the amplitude of variation of smooth specimen friction factor when stable wearing and tearing is also far longer than microstructure test specimen, illustrate that the wear process stability of striped microstructure is better than smooth surface.
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| CN105650443B (en) * | 2016-03-29 | 2018-08-14 | 武汉科技大学 | A kind of surface texture and its application based on hydrldynamic pressure lubrication |
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Inventor after: Zhao Yanling Inventor after: Zhao Zhiqiang Inventor after: Xiang Jingzhong Inventor after: Xia Chengtao Inventor after: Li Jicai Inventor after: Sun Mengmeng Inventor after: Kong Yongli Inventor after: Yu Yanmin Inventor before: Zhao Yanling Inventor before: Xiang Jingzhong Inventor before: Yang Xuesong Inventor before: Xia Chengtao Inventor before: Li Jicai Inventor before: Huang Ping Inventor before: Wang Weiquan Inventor before: Kong Yongli |
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