The effects of cooling rate on Ms and microstructures of Fv520(B) steel have been studied by hot expansion method,micro scopic test and XRD.
利用膨脹法、金相、XRD法研究了冷卻速度對(duì)Fv520(B)鋼Ms點(diǎn)及其組織的影響。
It shows that with the increase of compression deformation of parent phase, Ms point (starting temperature of martensitic transformation) of {259}f martensitic transformation is rising.
試驗(yàn)結(jié)果表明,母相壓縮變形使{259}f馬氏體轉(zhuǎn)變的Ms點(diǎn)(馬氏體開始形成溫度)升高,變形量較小時(shí)Ms點(diǎn)升高較快,變形量較大時(shí)Ms點(diǎn)升高的趨勢(shì)不如變形量較小時(shí)明顯;變形量較小時(shí){259}f馬氏體沒有擇優(yōu)取向,母相壓縮變形量為30%時(shí)的馬氏體和對(duì)應(yīng)的表面浮凸沿滑移線方向分別以細(xì)片狀和細(xì)條狀平行排列成“簇”;變形量較小時(shí){259}f馬氏體片的邊界與未變形相比更平直,30%母相壓縮變形得到的馬氏體片邊緣較破碎,而經(jīng)50%母相壓縮變形后,不但馬氏體片的邊緣較破碎,而且中脊也開始彎曲或折斷,在浮凸表面上表現(xiàn)為小的溝痕。
The effects of rare earth on TTT curve,Ms point and phase transformation critical points of 30CrMnSi cast steel were investigated.
研究了稀土對(duì) 30 Cr Mn Si鑄鋼 TTT曲線及相變點(diǎn)的影響 ,其結(jié)果為開始轉(zhuǎn)變曲線右移 ,終了轉(zhuǎn)變曲線左移 ,相變臨界點(diǎn)滯后 ,Ms點(diǎn)升
The Ms points and morphology of the crystalline structure for the Fe-30.
96Ti鐵基合金的Ms點(diǎn)、馬氏體形貌及合金的晶體結(jié)構(gòu)進(jìn)行了分析研究。
The influence of cooling rate on MS temperature of CuZnAlMnNi shape memory alloy was investigated by differential scanning calorimetry.
用差示掃描量熱分析技術(shù)研究了冷卻速率對(duì)CuZnAlMnNi記憶合金Ms點(diǎn)的影響。
Finally we target on cost to establish a integer programming model based on the limitations of purchasing needs of spectators and commercial benefits,and use a set of reasonable data to compute the concrete design scheme of the MS site by simulation of Matlab.
最后,建立了以成本為目標(biāo)函數(shù),以觀眾的購(gòu)物欲望、商業(yè)贏利為約束條件的整數(shù)規(guī)劃模型,對(duì)其中的參數(shù)N、n、Q、q、λ進(jìn)行合理估計(jì),給出一組數(shù)據(jù),借助MATLAB軟件計(jì)算出了MS網(wǎng)點(diǎn)的最佳設(shè)計(jì)方案。