本文選題：軟磁材料 + 鐵素體不銹鋼��； 參考：《南京理工大學(xué)》2017年碩士論文

【摘要】：隨著自動(dòng)控制技術(shù)的迅猛發(fā)展,軟磁材料在機(jī)電設(shè)備中的應(yīng)用越來越多。鐵素體不銹鋼是常見的金屬軟磁材料,與其它軟磁材料相比,其磁性能仍有不足,需要進(jìn)一步提高。另一方面,傳統(tǒng)軟磁材料為保證耐蝕性就需要加以電鍍,這樣既污染環(huán)境又增加了生產(chǎn)成本,因此開發(fā)耐蝕的軟磁材料十分必要。本論文是在研究現(xiàn)有鐵素體不銹鋼成分和性能的基礎(chǔ)上,進(jìn)一步探究組織和化學(xué)成分對(duì)鐵素體不銹鋼軟磁性能和耐蝕性能的影響。利用X射線熒光分析儀(EDX)、X射線衍射儀(XRD)、背散射電子衍射分析儀(EBSD)及光學(xué)顯微鏡等測試了合金成分、物相及顯微組織,同時(shí)結(jié)合磁性能測試和電化學(xué)實(shí)驗(yàn)結(jié)果分析,得到以下結(jié)論:(1)鐵素體不銹鋼中的Cr和Mo元素對(duì)磁性能影響較大;Ti、Si、Cu、Nb及Mn元素的添加有利于耐蝕性能的提高;晶粒尺寸對(duì)軟磁鐵素體不銹鋼的耐蝕性和磁性能有顯著影響。(2)隨著退火溫度的升高和退火時(shí)間的延長,再結(jié)晶晶粒逐漸變大,軟磁性能先變好后變差,晶粒尺寸為18μm時(shí)具有較好的軟磁性能;晶粒尺寸的變化對(duì)耐蝕性能的影響不顯著。(3)通過正交實(shí)驗(yàn)分析,得到Cr、Ti、Mo和Si元素對(duì)軟磁性能的影響順序?yàn)?TiSiCrMo,對(duì)耐蝕性能的影響順序?yàn)?CrMoTiSi。硅元素含量變化對(duì)軟磁性影響不大,對(duì)耐蝕性影響較大且含量越大耐蝕性越好;銅元素的添加對(duì)磁性能沒有顯著的影響,可顯著提高耐蝕性;鋁含量變化對(duì)耐蝕性影響不顯著,鋁含量越多軟磁性越好;鎳元素的添加對(duì)顯微組織、軟磁性和耐蝕性無明顯改善作用;少量稀土元素的添加有利于改善顯微組織和提高軟磁性,過多稀土元素的添加對(duì)軟磁性和耐蝕性沒有顯著影響。(4)與現(xiàn)有公司樣鋼相比,設(shè)計(jì)的新型鐵素體不銹鋼的軟磁性能得到顯著提高。性能較好的合金成分為:Cr18.0%、Ti0.4%、Mo1.8%、Si1.0%、Cu0.6%、Al1.3%、Mn1.0%和 S0.05%,還需控制 C+N≤0.015%。
[Abstract]:With the rapid development of automatic control technology, soft magnetic materials are applied more and more in electromechanical equipment. Ferritic stainless steel is a common metal soft magnetic material. Compared with other soft magnetic materials, the magnetic properties of ferrite stainless steel are still insufficient and need to be further improved. On the other hand, traditional soft magnetic materials need to be electroplated to ensure corrosion resistance, which not only pollutes the environment but also increases the production cost, so it is necessary to develop corrosion resistant soft magnetic materials. Based on the study of the composition and properties of ferrite stainless steel, the effects of microstructure and chemical composition on the soft magnetic properties and corrosion resistance of ferrite stainless steel were investigated in this paper. The composition, phase and microstructure of the alloy were measured by means of X-ray fluorescence analyzer edX X ray diffractometer, backscatter electron diffraction analyzer (EBSD) and optical microscope. At the same time, the magnetic properties and electrochemical experimental results were analyzed. The following conclusions are obtained: (1) the addition of Cr and Mo elements in ferrite stainless steel has a great influence on the magnetic properties. The addition of Cu NB and mn elements is beneficial to the improvement of corrosion resistance. Grain size has a significant effect on corrosion resistance and magnetic properties of soft magnetic ferrite stainless steel. When the grain size is 18 渭 m, the soft magnetic properties are better, and the effect of grain size on corrosion resistance is not significant. (3) by orthogonal experiment, it is found that the order of the effects of CrTiMo and Si on soft magnetic properties is: 1: TiSiCrMoand the order of effect on corrosion resistance is: CrTiTiSiSi. The content of silicon has little effect on the soft magnetic properties, and the larger the corrosion resistance is, the better the corrosion resistance is. The addition of copper has no significant effect on the magnetic properties, but it can significantly improve the corrosion resistance, while the change of aluminum content has no significant effect on the corrosion resistance. The more aluminum content, the better the soft magnetism, the less the addition of nickel, the less the microstructure, the better the corrosion resistance and the better the microstructure, the better the soft magnetic properties, the more the addition of rare earth elements, the better the microstructure and the better the soft magnetic properties. The soft magnetic properties and corrosion resistance of the new ferrite stainless steel were improved significantly compared with the existing steel. The alloy components with better properties are: 1: Cr18.0 and Ti0.4Mo1.8and about Si1.0and about Cu0.6Al1.3Mn1.0% and S0.05. it is also necessary to control C N 鈮，

本文編號(hào)：1957700