CoCrMo合金在三種環(huán)境中的扭轉(zhuǎn)復(fù)合微動(dòng)磨損特性研究
發(fā)布時(shí)間：2019-05-28 01:26
【摘要】：工業(yè)中實(shí)際的微動(dòng)工況十分復(fù)雜,集兩種或兩種以上微動(dòng)基本模式復(fù)合的復(fù)雜運(yùn)動(dòng)也經(jīng)常出現(xiàn),扭轉(zhuǎn)(扭動(dòng)+轉(zhuǎn)動(dòng))復(fù)合微動(dòng)是扭動(dòng)微動(dòng)和轉(zhuǎn)動(dòng)微動(dòng)兩種模式的耦合,是在交變載荷作用下接觸副發(fā)生微幅扭轉(zhuǎn)的相對(duì)運(yùn)動(dòng)。扭轉(zhuǎn)復(fù)合微動(dòng)磨損大大縮短了零部件的服役壽命,并且直接影響了安全生產(chǎn),同時(shí)也帶來了巨大的經(jīng)濟(jì)損失。扭轉(zhuǎn)復(fù)合微動(dòng)在人工關(guān)節(jié)植入、口腔修復(fù)種植、骨折內(nèi)固定器件等情況下廣泛存在,可目前少有人對(duì)扭轉(zhuǎn)復(fù)合微動(dòng)磨損進(jìn)行研究。 本文選取CoCrMo合金球頭與CoCrMo平面試樣作為試驗(yàn)對(duì)磨副,在法向載荷Fn=25N,扭轉(zhuǎn)復(fù)合角主要在a=10°和a=40°,角位移幅值主要在0=0.25°、0.5°、1°和2°的試驗(yàn)參數(shù)下,用25%血清溶液和人工關(guān)節(jié)液分別模擬其工作環(huán)境并同時(shí)對(duì)比其干態(tài)下的微動(dòng)行為進(jìn)行了扭轉(zhuǎn)復(fù)合微動(dòng)磨損特性研究。在詳細(xì)分析微動(dòng)接觸條件下動(dòng)力學(xué)的基礎(chǔ)上,結(jié)合掃描電子顯微鏡(SEM)、光學(xué)顯微鏡(OM)、電子能譜(EDX)和表面輪廓儀對(duì)磨斑進(jìn)行微觀分析,探討了CoCrMo合金扭轉(zhuǎn)復(fù)合微動(dòng)微動(dòng)的運(yùn)行行為和磨損機(jī)制,得出了以下結(jié)論： 1、CoCrMo合金球/平面配副在血清溶液、干態(tài)和人工關(guān)節(jié)液三種環(huán)境中的摩擦力-角位移幅值曲線都存在三種基本類型：直線型、橢圓型和平行四邊形型。 2、建立了CoCrMo合金以扭轉(zhuǎn)復(fù)合角和角位移幅值為變量的扭轉(zhuǎn)復(fù)合微動(dòng)運(yùn)行工況圖,并發(fā)現(xiàn)血清溶液和人工關(guān)節(jié)液中兩種環(huán)境中的微動(dòng)比干態(tài)下更易滑動(dòng)。 3、CoCrMo合金扭轉(zhuǎn)復(fù)合微動(dòng)的摩擦系數(shù)和摩擦耗散能強(qiáng)烈依賴于扭轉(zhuǎn)復(fù)合角、角位移幅值和循環(huán)周次。 4、研究表明扭轉(zhuǎn)復(fù)合角a、角位移幅值0和循環(huán)次數(shù)Cycle強(qiáng)烈影響血清溶液和人工關(guān)節(jié)液中CoCrMo合金扭轉(zhuǎn)復(fù)合微動(dòng)的磨損行為：血清中--(1)部分滑移區(qū)：磨斑呈現(xiàn)中心黏著邊緣微滑的環(huán)狀,接觸中心幾乎沒有損傷,磨斑的形貌呈現(xiàn)非對(duì)稱性,此時(shí)的磨損機(jī)制主要為磨粒磨損和極其輕微的氧化磨損。(2)混合區(qū)：磨斑中心黏著狀態(tài)減弱,損傷加劇,隨著循環(huán)的進(jìn)行,接觸界面間的相對(duì)運(yùn)動(dòng)有由部分滑移狀態(tài)轉(zhuǎn)變?yōu)橥耆茽顟B(tài)的趨勢(shì),此時(shí)的磨損機(jī)制仍主要為氧化磨損和磨粒磨損。(3)滑移區(qū)：整個(gè)接觸區(qū)域發(fā)生了劇烈的塑性變形,損傷嚴(yán)重并伴隨大量的磨屑生成,而扭轉(zhuǎn)復(fù)合角對(duì)磨屑的分布情況有非常重要的影響,且隨著扭轉(zhuǎn)復(fù)合角的增加,磨斑所表現(xiàn)出的損傷形貌出現(xiàn)轉(zhuǎn)動(dòng)微動(dòng)的特征,此時(shí)的磨損機(jī)制主要為氧化磨損、磨粒磨損和一定量的剝層。人工關(guān)節(jié)液中--(1)部分滑移區(qū)：磨斑呈現(xiàn)中心黏著邊緣微滑的環(huán)狀磨損,接觸中心由于黏著幾乎沒有損傷,磨斑周圍可看到少量磨屑,而此時(shí)的磨損機(jī)制主要為磨粒磨損和極其輕微的氧化磨損。(2)混合區(qū)：磨斑中心損傷劇烈,并且隨著循環(huán)的進(jìn)行,接觸界面間的相對(duì)運(yùn)動(dòng)有由部分滑移狀態(tài)轉(zhuǎn)變?yōu)橥耆茽顟B(tài)的趨勢(shì),此時(shí)的磨損機(jī)制仍主要為氧化磨損、磨粒磨損以及剝層。(3)滑移區(qū)：整個(gè)接觸區(qū)域發(fā)生了劇烈的塑性變形,損傷嚴(yán)重并伴隨大量的磨屑生成,磨屑顆粒致使接觸面可以看到犁削作用的痕跡,而扭轉(zhuǎn)復(fù)合角對(duì)磨屑的分布情況有非常重要的影響,且隨著扭轉(zhuǎn)復(fù)合角的增加,磨斑所表現(xiàn)出的損傷形貌出現(xiàn)轉(zhuǎn)動(dòng)微動(dòng)的特征,此時(shí)的磨損機(jī)制同混合區(qū)相同。
[Abstract]:The actual micro-motion condition in the industry is very complex, and the complex motion of the combination of two or more kinds of micro-motion basic modes is also common, and the twisting (twisting + rotation) composite micro-motion is the coupling of the two modes of twisting and micro-motion, Is the relative movement of the contact pair under the action of alternating load. The torsional composite fretting greatly shortens the service life of the parts and directly influences the safety production, and also brings great economic loss. The torsion composite micro-motion is widely existed in the case of artificial joint implantation, oral repair planting, internal fixation device, and so on. In this paper, the ball of CoCrMo alloy and the plane of CoCrMo are selected as the pair of test pairs. In the normal load Fn = 25N, the torsion compound angle is mainly at a = 10 擄 and a = 40 擄, and the angular displacement amplitude is mainly at the test parameters of 0 = 0.25 擄, 0.5 擄,1 擄 and 2 擄. At the same time, the fretting behavior of the composite fretting wear was investigated by using 25% serum solution and artificial joint fluid to simulate the working environment and the micromotion in the dry state. In this paper, on the basis of detailed analysis of the dynamics of fretting contact conditions, the microanalysis of the grinding spot by scanning electron microscope (SEM), optical microscope (OM), electron energy spectrum (EDX) and surface profile meter is carried out, and the operation behavior and wear of the CoCrMo alloy torsional composite micro-motion are discussed. The following knot is obtained. The three basic types of friction-angular displacement amplitude curve in the three environments of serum solution, dry state and artificial joint liquid are three basic types: linear, elliptic and parallel four. Edge shape.2. CoCrMo alloy is established to reverse the composite micro-motion operation condition of the composite angle and the angular displacement amplitude as the variable, and the micro-movement ratio in both the serum solution and the artificial joint liquid is found to be dry. the friction coefficient and the friction dissipation of the torsional composite micro-motion of the CoCrMo alloy strongly depend on the twist compound angle, the angular displacement, The results show that the torsional compound angle a, the angular displacement amplitude of 0 and the number of cycles Cycle strongly influence the wear behavior of the CoCrMo alloy in the serum solution and the artificial joint liquid. The ring-shaped, contact center of the micro-sliding of the adhesive edge has little damage, and the appearance of the grinding spot is non-symmetrical, and the wear mechanism at this time is mainly the abrasive wear of the abrasive grains. (2) mixing zone: the adhesion state of the center of the grinding spot is weakened, the damage is increased, and the relative movement between the contact interfaces is changed from the partial slip state to the completely slip state as the circulation progresses, and the wear mechanism is still mainly Oxidation wear and abrasive wear. (3) Sliding zone: The whole contact area has severe plastic deformation, the damage is serious and is accompanied by a large amount of wear, and the twist compound angle has a very important influence on the distribution of the abrasive dust, and with the With the increase of the twist compound angle, the damage appearance of the wear spot is characterized by the rotation and micro-motion. At this time, the wear mechanism is mainly the oxidation wear, the abrasive grain, Wear and a certain amount of stripping.--(1) Partial slip zone in the joint fluid--(1) Partial slip zone: the wear spot presents an annular wear at the center of the adhesion edge of the center, the contact center can see a small amount of wear due to the adhesion, and the wear mechanism at this time is mainly abrasive wear and wear. very slight oxidative wear. (2) The mixing zone: the center of the grinding spot is severely damaged, and as the circulation progresses, the relative movement between the contact interfaces has a tendency to transition from a partial slip state to a fully slip state, at which time the wear mechanism is still mainly oxidized and worn and the abrasion of the abrasive grains and the peeling of the layer. (3) the sliding area: the whole contact area is subjected to severe plastic deformation, the damage is serious and is accompanied by a large amount of abrasion, the abrasive particles cause the contact surface to see the trace of the action of the plough, and the distribution of the twist compound angle to the grinding chip It has a very important influence, and with the increase of the twist compound angle, the damage appearance of the wear spot has the characteristic of rotating and micro-motion, at this time the grinding
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH117
[Abstract]:The actual micro-motion condition in the industry is very complex, and the complex motion of the combination of two or more kinds of micro-motion basic modes is also common, and the twisting (twisting + rotation) composite micro-motion is the coupling of the two modes of twisting and micro-motion, Is the relative movement of the contact pair under the action of alternating load. The torsional composite fretting greatly shortens the service life of the parts and directly influences the safety production, and also brings great economic loss. The torsion composite micro-motion is widely existed in the case of artificial joint implantation, oral repair planting, internal fixation device, and so on. In this paper, the ball of CoCrMo alloy and the plane of CoCrMo are selected as the pair of test pairs. In the normal load Fn = 25N, the torsion compound angle is mainly at a = 10 擄 and a = 40 擄, and the angular displacement amplitude is mainly at the test parameters of 0 = 0.25 擄, 0.5 擄,1 擄 and 2 擄. At the same time, the fretting behavior of the composite fretting wear was investigated by using 25% serum solution and artificial joint fluid to simulate the working environment and the micromotion in the dry state. In this paper, on the basis of detailed analysis of the dynamics of fretting contact conditions, the microanalysis of the grinding spot by scanning electron microscope (SEM), optical microscope (OM), electron energy spectrum (EDX) and surface profile meter is carried out, and the operation behavior and wear of the CoCrMo alloy torsional composite micro-motion are discussed. The following knot is obtained. The three basic types of friction-angular displacement amplitude curve in the three environments of serum solution, dry state and artificial joint liquid are three basic types: linear, elliptic and parallel four. Edge shape.2. CoCrMo alloy is established to reverse the composite micro-motion operation condition of the composite angle and the angular displacement amplitude as the variable, and the micro-movement ratio in both the serum solution and the artificial joint liquid is found to be dry. the friction coefficient and the friction dissipation of the torsional composite micro-motion of the CoCrMo alloy strongly depend on the twist compound angle, the angular displacement, The results show that the torsional compound angle a, the angular displacement amplitude of 0 and the number of cycles Cycle strongly influence the wear behavior of the CoCrMo alloy in the serum solution and the artificial joint liquid. The ring-shaped, contact center of the micro-sliding of the adhesive edge has little damage, and the appearance of the grinding spot is non-symmetrical, and the wear mechanism at this time is mainly the abrasive wear of the abrasive grains. (2) mixing zone: the adhesion state of the center of the grinding spot is weakened, the damage is increased, and the relative movement between the contact interfaces is changed from the partial slip state to the completely slip state as the circulation progresses, and the wear mechanism is still mainly Oxidation wear and abrasive wear. (3) Sliding zone: The whole contact area has severe plastic deformation, the damage is serious and is accompanied by a large amount of wear, and the twist compound angle has a very important influence on the distribution of the abrasive dust, and with the With the increase of the twist compound angle, the damage appearance of the wear spot is characterized by the rotation and micro-motion. At this time, the wear mechanism is mainly the oxidation wear, the abrasive grain, Wear and a certain amount of stripping.--(1) Partial slip zone in the joint fluid--(1) Partial slip zone: the wear spot presents an annular wear at the center of the adhesion edge of the center, the contact center can see a small amount of wear due to the adhesion, and the wear mechanism at this time is mainly abrasive wear and wear. very slight oxidative wear. (2) The mixing zone: the center of the grinding spot is severely damaged, and as the circulation progresses, the relative movement between the contact interfaces has a tendency to transition from a partial slip state to a fully slip state, at which time the wear mechanism is still mainly oxidized and worn and the abrasion of the abrasive grains and the peeling of the layer. (3) the sliding area: the whole contact area is subjected to severe plastic deformation, the damage is serious and is accompanied by a large amount of abrasion, the abrasive particles cause the contact surface to see the trace of the action of the plough, and the distribution of the twist compound angle to the grinding chip It has a very important influence, and with the increase of the twist compound angle, the damage appearance of the wear spot has the characteristic of rotating and micro-motion, at this time the grinding
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH117
【參考文獻(xiàn)】
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