本文選題：圓筒印花鎳網 + 顯微結構　； 參考：《蘭州理工大學》2017年碩士論文

【摘要】：圓筒印花鎳網是圓網印花機中的關鍵性部件,在印染過程中印花鎳網發(fā)生斷裂將影響印花的質量和效率。因而圓筒印花鎳網的使用壽命直接影響圓網印花機的正常生產,制備高性能的圓筒印花鎳網是獲得較大經濟效益的關鍵。目前國際上圓筒印花鎳網質量最好的當屬荷蘭STORK公司,該公司的圓筒印花鎳網結構好、性能穩(wěn)定、使用壽命長并且能夠進行多次使用。國內生產圓筒印花鎳網的廠家有60多家。但是到目前為止我們對圓筒印花鎳網結構和性能的了解很少,僅僅局限于鎳網的開孔率、厚度、表面光澤度等方面。本文通過化學成分分析、X射線衍射、掃描電鏡等材料分析方法對不同目數(shù)圓筒印花鎳網進行顯微結構分析,并對其力學性能進行對比。結果表明:圓筒印花鎳網中鎳含量達99.69%且為典型的面心立方結構;隨著鎳網目數(shù)的增加,鎳網的網孔形狀由六邊形結構轉變?yōu)閳A形結構,并且鎳網的網孔大小和網孔間距均減小;STORK鎳網的一鍍鍍層和二鍍鍍層均發(fā)生了分層現(xiàn)象,并且鍍層出現(xiàn)環(huán)狀生長更致密,而國內鎳網均只在二鍍鍍層發(fā)生分層現(xiàn)象,環(huán)狀生長相對疏松;不同種類的圓筒印花鎳網的晶粒取向不同,國內A公司125目鎳網和STORK公司125目鎳網晶粒無明顯的擇優(yōu)取向。國內A公司除了125目鎳網以外的其他目數(shù)鎳網均呈明顯的(200)晶面擇優(yōu)取向,國內B公司鎳網105目和125目鎳網均表現(xiàn)為(200)晶面擇優(yōu)取向;國內A公司六種試樣斷口形貌均由大小不等的等軸韌窩組成,105目和125目鎳網試樣出現(xiàn)了獨特的扁平狀斷口,說明該試樣的一鍍鍍層和二鍍鍍層的結合性良好,塑性較好;由于氧化膜的存在,一鍍鍍層與二鍍鍍層之間的結合性能較差,導致拉伸過程中鍍層界面產生開裂,影響鎳網性能。根據圓筒鎳網的剛度計算方法,選擇了最佳測量長度為300mm,并且對不同目數(shù)鎳網進行剛度測量,國內A公司125目鎳網的剛度值為K=1.299×10-2 N·mm-1,優(yōu)于其他目數(shù)鎳網。
[Abstract]:Nickel screen for cylindrical printing is a key part in circular screen printing machine. The quality and efficiency of printing will be affected by the breakage of nickel screen in printing and dyeing process. Therefore, the service life of cylindrical nickel screen directly affects the normal production of circular screen printing machine, and the key to obtain greater economic benefit is to prepare high performance nickel screen for cylindrical printing. At present the best quality of cylinder printing nickel screen in the world is the Dutch company STORK. Its cylinder printing nickel screen has good structure, stable performance, long service life and can be used many times. Domestic production cylinder printing nickel screen manufacturers have more than 60. But so far we know little about the structure and performance of nickel mesh in cylindrical printing, which is limited to the opening ratio, thickness and surface gloss of nickel mesh. In this paper, the microstructure of nickel screen for cylinder printing with different mesh numbers is analyzed by means of chemical composition analysis, X-ray diffraction and scanning electron microscope, and its mechanical properties are compared. The results show that the nickel content in the nickel screen for cylindrical printing is 99.69% and is a typical face-centered cubic structure, and with the increase of nickel mesh number, the mesh shape of nickel mesh changes from hexagonal structure to circular structure. The size of the mesh and the distance between the meshes of the nickel mesh are reduced. Both the single plating and the second plating layer of the nickel mesh are delaminated, and the ring growth of the coating is more compact, while in the domestic nickel mesh the delamination occurs only in the second plating layer. The ring growth is relatively loose, and the grain orientation of different kinds of nickel screen is different, but there is no obvious preferred orientation between A company 125mesh nickel mesh and STORK company 125mesh nickel mesh. In China, all the nickel mesh except 125 mesh nickel mesh have obvious preferred orientation of crystal plane, and domestic B company nickel mesh 105 mesh and 125 mesh nickel mesh all show the preferred orientation of crystal plane. The fracture morphology of six kinds of specimens in A company in China is composed of equiaxed dimples of different sizes and 125 mesh nickel mesh specimens with unique flat fracture surface, which indicates that the joint property of one plating coating and two plating coating is good, and the plasticity is good. Due to the existence of oxide film, the bonding property between the first and second plating coatings is poor, which leads to the cracking of the interface of the coating during the tensile process, which affects the properties of the nickel mesh. According to the stiffness calculation method of cylindrical nickel mesh, the optimum measuring length is 300mm, and the stiffness of different mesh nickel mesh is measured. The stiffness of 125mesh nickel mesh of A company in China is 1.299 脳 10 ~ (-2) N m ~ (-1), which is superior to other nickel mesh.
【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TS194.3;TG146.15

【參考文獻】

相關期刊論文 前10條

1 錢建剛;李海婷;李彭瑞;;電鑄鎳工藝參數(shù)對鑄鎳層組織和性能的影響[J];稀有金屬材料與工程;2015年07期

2 呂鏢;汪笑鶴;胡振峰;徐濱士;;不同電流密度下陰極移動對電鍍鎳層性能的影響[J];電鍍與涂飾;2013年10期

3 劉仁志;;電鑄技術及其在電子產品中的應用[J];電鍍與精飾;2012年01期

4 王山山;;鎳網行業(yè)提升質量要打持久戰(zhàn)[J];紡織服裝周刊;2011年35期

5 明平美;李英杰;王艷麗;王書卿;姜無疾;;微細電鑄法制造高開孔率精細網片[J];電加工與模具;2011年04期

6 黃超;李洪友;江開勇;;電鑄技術的研究與發(fā)展[J];電鍍與環(huán)保;2010年06期

7 李春華;王雷;楊峰;成生偉;田文懷;;氨基磺酸鹽溶液中電鑄鎳的微觀組織及其夾雜物[J];材料導報;2010年18期

8 王瑞永;龍晉明;裴和中;;電鑄鎳及鎳合金的研究進展[J];電鍍與涂飾;2009年03期

9 由學志;由希雨;白楊;;國內外鎳網概況[J];紡織器材;2007年02期

10 胡美些;王寧;;我國電鑄技術的研究進展[J];電鍍與涂飾;2006年11期

相關博士學位論文 前1條

1 馬志超;塊體材料原位拉伸—疲勞測試理論與試驗研究[D];吉林大學;2013年

相關碩士學位論文 前3條

1 王開廳;材料微觀力學性能原位拉伸測試儀研制與試驗研究[D];吉林大學;2013年

2 蔣軍濤;基于稀土添加劑的電鑄技術研究[D];南京航空航天大學;2005年

3 趙飛;鎳—納米氧化鑭復合電鑄試驗研究[D];南京航空航天大學;2004年

，

本文編號：1834634