天堂国产午夜亚洲专区-少妇人妻综合久久蜜臀-国产成人户外露出视频在线-国产91传媒一区二区三区

當(dāng)前位置:主頁 > 科技論文 > 鑄造論文 >

Al-7Sn-1.1Ni-Cu-0.2Ti軸承合金微觀組織與力學(xué)性能

發(fā)布時(shí)間:2018-03-03 00:38

  本文選題:軸承合金 切入點(diǎn):微觀組織 出處:《材料工程》2017年06期  論文類型:期刊論文


【摘要】:采用掃描電鏡、能譜分析、金相顯微鏡與WDW-100KN萬能拉伸試驗(yàn)機(jī)研究Al-7Sn-1.1Ni-Cu-0.2Ti軸承合金的微觀組織與力學(xué)性能,結(jié)合盤-銷式摩擦磨損試驗(yàn)機(jī)考察合金不同組織狀態(tài)的潤滑性能。結(jié)果表明:Al-7Sn-1.1Ni-Cu-0.2Ti合金凝固收縮率為1.13%,鑄態(tài)抗拉強(qiáng)度、屈服強(qiáng)度、伸長率與布氏硬度分別為191,147MPa,15.6%與34.6HBS,隨著低溫時(shí)效與退火熱處理過程的進(jìn)行,抗拉強(qiáng)度略有上升,屈服強(qiáng)度保持不變,伸長率與布氏硬度均呈現(xiàn)出先上升后下降的變化趨勢;沿晶界分布的共晶Sn相形貌受界面張力作用逐步由板片狀與骨骼狀轉(zhuǎn)變?yōu)閷悠瑺钆c短棒狀,部分吸熱脫溶析出在晶界處形成空腔結(jié)構(gòu),初生α-Al基體平均晶粒尺寸為182μm。與鑄態(tài)和340℃退火6h相比,經(jīng)175℃時(shí)效10h后,摩擦因數(shù)降低了28.6%與78.6%,體積磨損量減少了157.1%與471.4%,斷口形貌以沿晶斷裂與韌窩斷裂為主。
[Abstract]:The microstructure and mechanical properties of Al-7Sn-1.1Ni-Cu-0.2Ti bearing alloy were studied by SEM, EDS, metallographic microscope and WDW-100KN universal tensile tester. The lubrication properties of the alloy in different microstructure states were investigated by using a disk-pin friction and wear tester. The results showed that the solidification shrinkage rate of the alloy was 1.13. The as-cast tensile strength and yield strength were obtained. The elongation and hardness of Brinell were 191t 147MPA 15.6% and 34.6HBSrespectively. With the process of low temperature aging and annealing heat treatment, the tensile strength increased slightly, the yield strength remained unchanged, and the elongation and Brinell hardness showed a trend of first rising and then decreasing. The morphology of eutectic Sn phase distributed along grain boundary is gradually changed from lamellar and skeletal to lamellar and short rod by interfacial tension, and some endothermic desolvent precipitates form cavity structure at grain boundary. The average grain size of primary 偽 -Al matrix is 182 渭 m. Compared with as-cast and annealed at 340 鈩,

本文編號(hào):1558824

資料下載
論文發(fā)表

本文鏈接:http://sikaile.net/kejilunwen/jiagonggongyi/1558824.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶5c583***提供,本站僅收錄摘要或目錄,作者需要?jiǎng)h除請(qǐng)E-mail郵箱bigeng88@qq.com
最近中文字幕高清中文字幕无| 日本不卡片一区二区三区| 欧美不卡午夜中文字幕| 久久99亚洲小姐精品综合| 超碰在线播放国产精品| 日本理论片午夜在线观看| 精品人妻一区二区三区免费| 欧美日韩人妻中文一区二区| 亚洲精品国产精品日韩| 人妻乱近亲奸中文字幕| 日韩日韩欧美国产精品| 亚洲日本加勒比在线播放| 激情三级在线观看视频| 国产欧美日韩在线一区二区| 亚洲精品美女三级完整版视频| 久久99精品日韩人妻| 尹人大香蕉中文在线播放| 俄罗斯胖女人性生活视频| 丰满少妇被猛烈插入在线观看| 亚洲欧洲日韩综合二区| 国产三级不卡在线观看视频| 亚洲欧美日产综合在线网| 亚洲一级二级三级精品| 91国内视频一区二区三区| 又大又长又粗又黄国产| 国产精品免费不卡视频| 免费久久一级欧美特大黄孕妇| 91在线国内在线中文字幕| 国产精品久久精品毛片| 91福利免费一区二区三区| 搡老妇女老熟女一区二区| 午夜直播免费福利平台| 五月天丁香婷婷一区二区| 草草视频精品在线观看| 2019年国产最新视频| 亚洲精品中文字幕无限乱码| 好吊色免费在线观看视频| 欧美一级不卡视频在线观看| 夫妻性生活黄色录像视频 | 大香伊蕉欧美一区二区三区| 欧美三级大黄片免费看|