本文選題：強(qiáng)流脈沖電子束 + 離子氮化��； 參考：《重慶理工大學(xué)》2015年碩士論文

【摘要】：齒輪作為在機(jī)械裝備中重要基礎(chǔ)部件之一,得到了廣泛的應(yīng)用。由于工作中受到彎曲應(yīng)力、接觸應(yīng)力、沖擊力等多種力的綜合作用,齒輪極易產(chǎn)生失效而影響齒輪傳動的穩(wěn)定性、可靠性和壽命。根據(jù)統(tǒng)計(jì),齒輪失效導(dǎo)致的各種機(jī)械故障占到60%以上,齒輪的應(yīng)用環(huán)境復(fù)雜、載荷復(fù)雜,導(dǎo)致齒輪的失效形式也是多種多樣。隨著機(jī)械工業(yè)高速發(fā)展,齒輪技術(shù)向高速、重載、高可靠性方向發(fā)展,這就對齒輪性能提出更高的要求,開展齒輪材料和齒輪表面改性的研究成為重要的研究方向。課題主要對典型的中碳合金調(diào)質(zhì)鋼40Cr進(jìn)行研究,在對40Cr基體滲氮的基礎(chǔ)上進(jìn)行物理氣相沉積TiN、TiAlN涂層以及與強(qiáng)流脈沖電子束相結(jié)合的復(fù)合工藝,研究離子氮化40Cr表面沉積TiN、TiAlN涂層、電子束照射后表面沉積TiN、TiAlN涂層和電子束照射后表面沉積TiN、TiAlN涂層再電子束照射的組織與性能特征。經(jīng)過研究可以得到以下結(jié)果:(1)離子氮化后物理氣相沉積TiAlN與TiN涂層均勻致密、厚度均勻,與基體結(jié)合良好,Ti N涂層主要組成是TiN與Ti2N,TiAlN涂層則主要由Fe4N、(Ti,Al)N和TiN等相組成。TiAlN和TiN的表面硬度分別達(dá)到3000HV0.2和2700HV0.2,比氮化表面高3倍多,TiAlN與TiN涂層結(jié)合力分別為17N和15N。(2)離子氮化40Cr表面沉積TiN、TiAlN涂層工藝,TiAlN的磨損量最低,在載荷15N時(shí)為離子氮化磨損量的32%,TiN的磨損量為離子氮化磨損量的58%;在相同的加載條件下,TiAlN涂層磨痕寬度均勻,TiN磨痕邊緣涂層變形與剝落更加明顯,涂層磨損嚴(yán)重。(3)40Cr經(jīng)電子束在27kV不同次數(shù)照射后,表面產(chǎn)生典型的“熔坑”形貌,隨著次數(shù)的增加熔坑數(shù)量呈先減少再增大的趨勢,經(jīng)過電子束照射和未經(jīng)電子束照射XRD檢測物相結(jié)果表明,電子束照射后出現(xiàn)新的物相γ-Fe,電子束照射后鍍膜的物相主要是由TiAlN、TiN、AlN組成。(4)電子束照射后表面沉積TiN、TiAl N涂層,在27kV、45次時(shí)磨損體積最大為39.475×10-3mm3,在27kV、25次最小為24.11×10-3mm3。在27kV、25次電子束照射下的殘余應(yīng)力為495.5MPa,27kV、25次照射后涂覆TiAlN的殘余應(yīng)力值為27.4MPa。電子束照射后的陽極極化曲線表明自腐蝕電流密度最小的是2號樣也就是27kV、5次,說明2號樣的耐蝕性能是最好的。電子束照射后鍍膜的陽極極化曲線結(jié)果表明在27kV、35次參數(shù)下Icorr4=0.652μA/cm2說明試樣耐蝕性能是最好。(5)電子束照射后表面沉積TiN、TiAlN涂層再電子束照射工藝40Cr表面涂覆TiN經(jīng)過15kV、5次電子束照射后的截面組織膜層與未照射狀態(tài)相比厚度減薄,膜層連續(xù),經(jīng)過18kV5次照射后的截面涂層不連續(xù)。(6)40Cr表面涂覆TiN和TiAlN涂層后經(jīng)過電子束照射后摩擦磨損的磨損體積,40Cr表面涂覆TiN涂層在18kV、5次時(shí)磨損體積最小為10.961×10-3mm3。40Cr表面涂覆TiAlN涂層在21kV、5次時(shí)最小為10.256×10-3mm3。
[Abstract]:As one of the important basic parts in mechanical equipment, gear has been widely used. Due to the combined action of bending stress, contact stress, impact force and other forces, gear is prone to failure, which affects the stability, reliability and life of gear transmission. According to statistics, all kinds of mechanical faults caused by gear failure account for more than 60%, the application environment of gear is complex, the load is complex, and the failure forms of gear are also varied. With the rapid development of mechanical industry, gear technology develops to high speed, heavy load and high reliability, which puts forward higher requirements for gear performance. It is an important research direction to carry out the research on gear material and gear surface modification. In this paper, the typical medium carbon alloy quenched and tempered steel 40Cr was studied. Based on the nitriding of 40Cr substrate, the physical vapor deposition of TiN- TiAlN coating and the combination of TiAlN coating with high current pulsed electron beam were carried out to study the TiN- TiAlN coating deposited on the 40Cr surface by ion nitridation. The microstructure and properties of TiN- TiAlN coating after electron beam irradiation and TiN- TiAlN coating after electron beam irradiation were studied. The results are as follows: (1) after ion nitriding, TiAlN and tin coatings are uniform and dense, and the thickness is uniform. The surface hardness of tin and tin is 3000HV0.2 and 2700HV0.2 respectively, which is more than three times higher than that of nitrided surface. The bonding force between tin and tin coating is 17N and 15N, respectively. The coating process of TiAlN on the surface of 40Cr by ion nitridation is the lowest, and the wear rate of TiAlN is the lowest. When the load is 15 N, the wear amount of 32% tin is 58% of the amount of ion nitrided wear, and under the same loading conditions, the wear trace width of TiAlN coating is uniform, and the deformation and spalling of the edge coating of tin wear mark are more obvious. The coating wear is serious. (3) when 40Cr is irradiated by electron beam at 27kV for different times, the surface of 40Cr produces a typical "melting pit" morphology, and with the increase of the number of times, the number of melting pits decreases first and then increases. The results of X-ray diffraction and electron beam irradiation showed that a new phase 緯 -Fe appeared after electron beam irradiation, and the coating was mainly composed of TiAlN, TiN and AlN. (4) TiN- TiAlN coating was deposited on the surface after electron beam irradiation. The maximum wear volume is 39.475 脳 10 ~ (-3) mm ~ (-3) at 45 times and 24.11 脳 10 ~ (-3) mm ~ (-3) at 27 kV ~ (25) times. The residual stress of TiAlN coating is 27.4MPa after 25 times of electron beam irradiation, and the residual stress is 495.5 MPA ~ (27) KV ~ (2 +). The anodic polarization curve after electron beam irradiation shows that the minimum corrosion current density is the second sample, that is, 27 kV ~ (-1) for 5 times, which indicates that the corrosion resistance of sample 2 is the best. The anodic polarization curve of the coating after electron beam irradiation shows that the corrosion resistance of the sample is the best under the parameters of 27kV ~ (35) times Icorr _ 4N _ (0.652) 渭 A/cm2. (5) after electron beam irradiation, tin coating on 40Cr surface is coated with tin after 15 kV ~ (5) times of electric irradiation. (5) after electron beam irradiation, tin coating is deposited on the surface of TiAlN coating and then irradiated by electron beam. The thickness of the cross-section tissue film after sub-beam irradiation was thinner than that of the non-irradiated state. The film is continuous, (6) the wear volume of 40Cr coated with tin and TiAlN coating after electron beam irradiation is different. (6) the wear volume of 40Cr coated with tin coating is 10.961 脳 10 ~ (-3) mm ~ (3) mm ~ (40) Cr and the wear volume is 10.961 脳 10 ~ (-3) mm ~ (3) mm ~ (40) Cr at 18 kV ~ (5) times. The minimum value is 10.256 脳 10 ~ (-3) mm ~ (-3) at 21 kV ~ (-1) 5 times.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG174.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 周春華,袁書強(qiáng),任安峰,賀勇;鑄造鋁合金電子束改性的組織與性能研究[J];兵器材料科學(xué)與工程;2003年03期

2 吳笛;;物理氣相沉積技術(shù)的研究進(jìn)展與應(yīng)用[J];機(jī)械工程與自動化;2011年04期

3 潘曉龍;劉嘯鋒;王少鵬;;TC4鈦合金表面磁控濺射TiAlN涂層的組織與性能[J];鈦工業(yè)進(jìn)展;2013年05期

4 陳利;汪秀全;尹飛;李佳;;TiN涂層的微觀組織結(jié)構(gòu)及力學(xué)性能分析[J];硬質(zhì)合金;2006年01期

5 劉愛華;鄧建新;顏培;劉文清;;TiAlN涂層刀具的抗高溫特性研究[J];制造技術(shù)與機(jī)床;2010年07期

相關(guān)碩士學(xué)位論文 前1條

1 韓丹;強(qiáng)流脈沖電子束40CrNiMo7鋼表面改性實(shí)驗(yàn)研究[D];大連理工大學(xué);2013年

，

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