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AlCrN復合刀具涂層的制備及切削性能研究(附答辯)

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AlCrN復合刀具涂層的制備及切削性能研究(附答辯)(任務書,開題報告,中期檢查表,外文翻譯,論文說明書15000字,答辯PPT,答辯記錄表)
摘  要 本文利用多弧離子鍍技術在鎢鋼表面沉積AlCrN涂層,研究不同N2流量對AlCrN涂層顯微組織及性能的影響,并選擇最佳工藝參數制備具有AlCrN涂層的鎢鋼刀具。采用X射線衍射儀、激光共聚焦顯微鏡、顯微硬度計、劃痕儀、摩擦磨損試驗機及數控加工中心研究了AlCrN涂層的組織結構、顯微硬度、膜基結合力、摩擦磨損性能及其刀具的銑削性能,揭示了N2流量對AlCrN涂層的結構、硬度、膜基結合力和摩擦磨損性能的影響規律,分析了具有AlCrN涂層的鎢鋼刀具的切削失效機理。
通過對比不同N2流量的XRD圖譜可知,隨著N2流量的增加,薄膜組織變得致密,結晶好,柱狀晶明顯,因此衍射峰更明顯。隨N2流量的逐漸增大,大顆粒數量減少,這是因為隨著N2流量的增加,靶材氮化程度變高,靶材的離化程度減少,沉積到表面的數量減少,且隨N2流量增加,氣體分子對大顆粒有一定的阻擋作用。AlCrN涂層的顯微硬度隨N2流量的增加呈先增后減的趨勢,這是因為隨著氮氣分壓的增大,生成具有適當化學劑量比的面立方結構體,降低了離子間距;另外入射離子能量逐漸降低,晶粒尺寸長大變得困難,不利于晶界形變。在N2流量為150sccm時,膜基結合力最強,AlCrN涂層形成褶皺,剝落形式呈塊狀剝離,磨痕較窄較淺,其主要磨損機制為磨粒磨損與粘著磨損。AlCrN涂層的摩擦系數約為0.35~0.45之間,在干摩擦條件下,AlCrN涂層的主要磨損機制為磨粒磨損、氧化磨損及涂層剝落損傷。 版權所有56DOC.COM
以鎢鋼(YG6X)為基體,AlCrN涂層硬質合金刀具在銑削速度為560r/min條件下進行銑削實驗,研究表明,AlCrN涂層硬質合金刀具的失效過程為:首先切削刃口處涂層發生脫落,然后涂層與基體共同磨損,在切屑的粘結作用下,涂層發生進一步剝離,最后基體在粘結磨損和氧化磨損作用下快速磨損。

關鍵詞:多弧離子鍍;AlCrN涂層;膜基結合力;摩擦磨損性能;銑削
Study on Preparation and Cutting Performance of AlCrN Composite Tool Coating
Abstract In this paper, multi-arc ion plating technology was used to deposit AlCrN coating on the surface of tungsten steel. The effects of different N2 flow rates on the microstructure and properties of AlCrN coatings were studied. The best process parameters were chosen to prepare tungsten steel tools with AlCrN coating. The microstructure, microhardness, bond strength, friction and wear properties of AlCrN coatings were studied by X-ray diffractometer, laser confocal microscope, microhardness tester, scratch tester, friction and wear tester and numerical control machining center. The milling performance of the tool reveals the influence of N2 flow rate on the structure, hardness, bond strength and friction and wear performance of the AlCrN coating. The cutting failure mechanism of the tungsten steel tool with AlCrN coating is analyzed.

【內容來自www.ocuhh.icu 咨詢QQ:306826066】


By comparing the XRD patterns of different N2 flow rates, it can be seen that as the N2 flow rate increases, the thin film structure becomes dense, the crystallinity is good, and the columnar crystals are obvious, so the diffraction peak is more obvious. With the gradual increase of N2 flow, the number of large particles decreases, because with the increase of N2 flow, the degree of nitridation of the target becomes higher, the degree of ionization of the target material decreases, the amount deposited on the surface decreases, and the flow rate with N2 increases. Increase, gas molecules have a certain role in blocking large particles. The microhardness of AlCrN coating increases first and then decreases with the increase of N2 flow rate. This is because as nitrogen partial pressure increases, a face cube structure with an appropriate stoichiometric ratio is generated, which reduces the ion spacing; The incident ion energy gradually decreases, grain size becomes difficult to grow, and it is not conducive to grain boundary deformation. When the flow rate of N2 was 150sccm, the bonding force of the film base was the strongest, the AlCrN coating formed wrinkles, the exfoliation form was massive exfoliation, the wear marks were narrow and shallow, and the main wear mechanisms were abrasive wear and adhesive wear. The friction coefficient of AlCrN coating is between 0.35 and 0.45. Under the condition of dry friction, the main wear mechanisms of AlCrN coating are abrasive wear, oxidative wear and coating peeling damage.
內容來自www.ocuhh.icu

Using tungsten carbide (YG6X) as the substrate, AlCrN coated carbide cutting tools under the condition of milling speed of 560r/min milling experiments, research shows that the AlCrN coating carbide cutting tool failure process is: first coated cutting edge The layer falls off, and then the coating and the substrate wear together. Under the action of the bonding of the chip, the coating undergoes further peeling. Finally, the substrate wears rapidly under the action of adhesive wear and oxidation wear.
Key words: multi-arc ion plating, AlCrN coating, film-based bonding force ,friction and wear performance ,milling
 
目  錄
摘  要    I
Abstract    II
目  錄    IV
第一章 緒論    1
1.1 引言    1
1.2 多弧離子鍍技術    1
1.2.1多弧離子鍍的原理與特點    1
1.2.2 多弧離子鍍的工藝參數    2
1.3  AlCrN涂層的研究現狀    3
【內容來自www.ocuhh.icu 咨詢QQ:306826066】

1.4  本課題研究的內容及意義    4
第二章 實驗材料與實驗方法    5
2.1 實驗材料    5
2.2 實驗方法    5
2.3 實驗所用設備及儀器    7
2.4 組織分析及性能測試    9
2.4.1 XRD物相分析    9
2.4.2顯微硬度測試方法    9
2.4.3試樣金相組織觀察    10
2.4.4  磨損性能測試方法    10
2.4.5  結合強度測試方法    10
2.4.6  銑削性能測試方法    11
2.5   本章小結    11
第三章 N2流量對AlCrN涂層組織結構的影響    12
3.1不同N2流量下AlCrN涂層的物相分析    12
3.2  不同N2流量下AlCrN涂層的顯微組織分析    12
3.3  不同N2流量下AlCrN涂層的顯微硬度分析    13
3.4  本章小結    14
第四章 AlCrN涂層的膜基結合強度及摩擦磨損特性研究    15 本文來自www.ocuhh.icu 咨詢QQ:869918441
4.1AlCrN涂層的膜基結合強度研究    15
4.1 .1 AlCrN涂層的膜基結合強度    15
4.1.2 AlCrN涂層的損傷機制研究    16
4.2  AlCrN涂層的摩擦磨損特性及磨損機理研究    16
4.2.1  AlCrN涂層的摩擦磨損特性分析    17
4.2.2  AlCrN涂層的磨損機理研究    20
4.3  本章小結    20
第五章AlCrN涂層刀具的切削和摩擦學特性    22
5.1引言    22
5.2銑削實驗試驗條件與方法    22
5.3試驗結果與討論    23
5.4刀具磨損機理分析    24
5.5本章小結    25
結論    27
參考文獻    28
致謝    30
附錄    31
版權所有56DOC.COM

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