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.
利用膨胀法、金相、XRD法研究了冷却速度对Fv520(B)钢Ms点及其组织的影响。
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.
试验结果表明,母相压缩变形使{259}f马氏体转变的Ms点(马氏体开始形成温度)升高,变形量较小时Ms点升高较快,变形量较大时Ms点升高的趋势不如变形量较小时明显;变形量较小时{259}f马氏体没有择优取向,母相压缩变形量为30%时的马氏体和对应的表面浮凸沿滑移线方向分别以细片状和细条状平行排列成“簇”;变形量较小时{259}f马氏体片的边界与未变形相比更平直,30%母相压缩变形得到的马氏体片边缘较破碎,而经50%母相压缩变形后,不但马氏体片的边缘较破碎,而且中脊也开始弯曲或折断,在浮凸表面上表现为小的沟痕。
The effects of rare earth on TTT curve,Ms point and phase transformation critical points of 30CrMnSi cast steel were investigated.
研究了稀土对 30 Cr Mn Si铸钢 TTT曲线及相变点的影响 ,其结果为开始转变曲线右移 ,终了转变曲线左移 ,相变临界点滞后 ,Ms点升
The Ms points and morphology of the crystalline structure for the Fe-30.
96Ti铁基合金的Ms点、马氏体形貌及合金的晶体结构进行了分析研究。
The influence of cooling rate on MS temperature of CuZnAlMnNi shape memory alloy was investigated by differential scanning calorimetry.
用差示扫描量热分析技术研究了冷却速率对CuZnAlMnNi记忆合金Ms点的影响。
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,建立了以成本为目标函数,以观众的购物欲望、商业赢利为约束条件的整数规划模型,对其中的参数N、n、Q、q、λ进行合理估计,给出一组数据,借助MATLAB软件计算出了MS网点的最佳设计方案。