Equal channel angular processing in a pearlitic structured steel 珠光體組織的等徑彎曲通道變形
Paratype 1 , same date . this species is very similar to a . incwata , but differ in pygofer process with two asymmetrical angular process near apex and the markings of pronotum is also different . 2 使用相關(guān)指令得到參數(shù)值相同的2個(gè)樹,通過比較樹1接受為本亞科的系統(tǒng)發(fā)育圖,并對(duì)其進(jìn)行分析,同時(shí)輸出它的性狀參數(shù)值。
Severe plastic deformation ( spd ) processing , especially equal - channel angular processing ( ecap ) of steel and other iron - based alloys , has achieved increasing interest recently because of the potential for obtaining ultrafine grains and improving the properties 近年來,強(qiáng)烈塑性變形特別是鋼和鐵基合金的等徑彎曲通道變形因?yàn)榫哂蝎@得超細(xì)晶組織和改善性能的潛力,引起了各國研究人員的很大興趣。
Equal channel angular processing of the pearlitic steel ( 0 . 65 wt . % c ) was successfully carried out at 650 with route c in this study , obtaining a total equivalent true strain ~ 5 . the microstructure evolution of pearlitic steel in ecap was investigated by means of transmission electron microscope and scanning electron microscope . the main results are as the following : 1 本研究成功地實(shí)現(xiàn)了c方式650珠光體鋼65mnecap變形,累積等效真應(yīng)變達(dá)到5 。并用透射電鏡、掃描電鏡研究了珠光體組織的演變特點(diǎn)和滲碳體的變形。主要結(jié)果如下: 1
In performing ecap , a material is subjected to intense plastic straining by pressing a sample repeatedly through a die containing two channels , with equal cross - sections , intersecting at an angle . equal channel angular processing of the medium carbon steel ( 0 . 45 wt . % Ecap變形是使試樣通過橫截面相等并成一定交角的兩通道的模具中而產(chǎn)生強(qiáng)烈的塑性變形的一種變形方法。最近人們運(yùn)用ecap變形方法成功地使低碳鋼及珠光體鋼組織超細(xì)化,關(guān)于這方面的研究已引起了人們的廣泛關(guān)注。