The results show that upper bainite of 9Cr2Mo Steel and GCr15 steel is feathery and the upper bainite carbide is lamellar or claviform. The upper bainite carbide distributes between the subunits of bainite ferrites by and large parallelly to the axis of bainite ferrites. Lower bainite of 9Cr2Mo Steel and GCr15 steel is in bamboo leaf shape and the lower bainite carbide is in shred or fibre shape. The lower bainite carbide distributes between the bainite ferrites, furthermore, the angles between lower bainite carbonide and the principal axis of the lower bainite ferrites are unequal.

結(jié)果表明欧美乱爽乱视二，9Cr2Mo鋼和GCr15鋼的上貝氏體組織呈羽毛狀免费欧美一级A片，上貝氏體碳化物呈長短不一的薄片狀或短棒狀，分布在鐵素體亞片條或亞單元之間九九精品视频在线播放8，其排列與貝氏體鐵素體片條軸向大體上平行分布无码专区视频一区古典武侠；下貝氏體組織呈竹葉狀或針狀，下貝氏體碳化物呈細(xì)片狀或纖維狀等形狀99热在线这里只有精品3，分布在鐵素體片中間午夜又爽又色的高清视频，大多數(shù)與片條的主軸方向交角排列国产第一区视频，但角度不等欧美国产一级黃片。

The objectives of this paper were to investigate the simulation and design of continuous multiple-station rolling forming process for a U-Section Steel Bar by CAE software-DEFORMTM Due to the limitation of elements number using a short strip 120mm went through all the stations to simulate the real continuous rolling forming on factory The roller gap was fixed as 0 30mm roll speed was 20 rad/sec and progressive angles were all equal for each rolling process which were the formed angle divided by by the number of station Three rolling processes were selected with 6 9 and 12 stations respectively During simulation processes two cases occurred Case A the strip was through a single station Case B the strip across two stations Because the strip laterals side was stretched and twisted during the process The model of case B closer to the practical process than case A and the calculated stress and strain on the tip of U section for case A were lower than these for case B by up to 15% From the result of case B for each process the stress for 12-station process was smallest 9-station process second and 6-station process next Because less-station can save larger cost and forming time but the bigger stress and strain for 6-station caused wrinkles on lateral sides not found on 9-station and 12-station Therefore 9-station process was a more suitable design than 12-station process smaller stretched and twisted and stress The progressive angles for 12-station was 7 5?

本文主要是以DEFORMTM有限元素軟體模擬U型鋼片連續(xù)道次成型與單一道次成型以確認(rèn)單一道次模擬的是否可取代連續(xù)道次模擬之研究亚洲精品三级片网视频。因DEFORMTM 軟體對於網(wǎng)格元素上的限制故使用較短素材120mm通過所有的成型站以模擬工廠實(shí)際連續(xù)成形方法。輥輪間隙固定為0 3mm一级片播放；輥輪轉(zhuǎn)速為20 rad/sec淫蕩網站；彎曲角度的方法為將成型角度平均除以成型站數(shù)。有三種輥輪成型方式被選擇分別為6站毛片女人十A片十女人，9站黄色美.女40岁视频看看，與12站。在模擬的過程中有兩種現(xiàn)象會產(chǎn)生 Case A色综合久久久金八天国，素材通過單一成型站在线成人漫画。Case B，素材會通過兩個(gè)成型站无码好看中文字幕免费视频。因?yàn)樵谀M過程中素材的兩端會有拉應(yīng)力與扭力欧美精品在线免费观看。Case B的模擬比Case A像實(shí)際的制程，并計(jì)算應(yīng)力與應(yīng)變在U型斷面的Tip部中可發(fā)現(xiàn)Case A比Case B低約15%亚洲AAAAAV特级黄片。從Case B的每站的結(jié)果可以得知天天色色色色色色色色色色色色色色色色色，12站的成型應(yīng)力最小，9站次之亚洲人成人网站在线观看，6站最后黄色视频金典免费播放。

Finally, the parameters, such as density, thickness of porous media, thickness of steel of each material in air and porosity, pore size, thickness of porous materials, thickness of steel and incident angles in water were investigated and also the influence on the sound absorption and insulation were discussed.

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narrating angles：敘事視角

外包鋼:bonded steel angles | 敘事視角:narrating angles | 閥座圈:vavle seat insert

channel, channel steel：槽鋼

不等肢角鋼 unequal angle steel | 槽鋼 channel, channel steel | 背對背角鋼組合 angles back to back

Tolerance of dimensions for stampings：沖壓件尺寸公差

燒結(jié)奧氏體不銹鋼結(jié)構(gòu)零件技術(shù)條件 Standard specification for sintered austenitic stainless steel st... | 沖壓件尺寸公差 Tolerance of dimensions for stampings | 沖壓件角度公差 Tolerance of angles for sta...