【摘 要】
：
The uneven amount of globular structure in a very low carbon, low alloy steel in annealed state is studied. After the examination of TEM and EPMA, it is conside
【机 构】
：
School of Material Science and Engineering, Shanghai University, Shanghai 200072, China
论文部分内容阅读
The uneven amount of globular structure in a very low carbon, low alloy steel in annealed state is studied. After the examination of TEM and EPMA, it is considered that this globular structure arranging in chains and in grain boundaries is carbide and is formed, due to the falling to the pseudo-eutectoid zone, in the quick cooling process after hot rolling. In addition, the alloying addition of Ti, V and rare earth element also aggravates the precipitation of carbide. In order to limit the quantity and size of the carbide so as to improve the drawing behavior of the material, the annealing temperature is properly raised to get the equilibrium structure.
其他文献
如果来到西双版纳旅游,您没吃蒲草饭就太遗憾啦!如今蒲草饭已改头换面进入大酒店,一改过去粗犷外型,草编艺术与美食文化巧妙结合,被装进一个个手工编织,外形酷似香囊的精致可
1 种子纯度检验的迫切性我国所有作物种子的分级标准都是以纯度发芽率和净度三项标准作为定级依据的,其中以品种纯度作为定级的主要依据。如凡净度,发芽率两项中的一项比品
The stress-intensity factor (SIF) of the semi-elliptical surface crack in the finite body under extensional stress is sclculated by using the FEM software ANSYS
The Chinese stock market’s financing function gets weaker since the IPO stopped last August. While at the same time, Chinese economy is developing very fast an
目的：检测P27蛋白及Survivin在胃癌细胞中的表达水平，研究二者在胃癌表达中的相关性及其对胃癌发生和临床病理特征表现的影响。 方法：应用二步法免疫组化方法检测P27蛋白及Su
紧凑型玉米是国内外育种工作者为提高玉米的光合效率,开展“株型”育种研究而选育的增产明显的玉米品种。1987年我们在锦州市开始引种试种,1989年参加市区域试验,1992年大面
We propose a method that uses linear chirp modulated Gaussian functions as the elementary functions, by adaptively adjusting variances, time-frequency centers a
目的: 观察低分子量肝素(LMWH)和地塞米松(DXM)对人白蛋白(ALB)致体外培养的人肾小管上皮细胞株(HK-2)增殖及FN、TGF-β分泌的影响,初步探讨LMWH和DXM对肾间质纤维化的防治作
The spectral domain integral equation(SDIE) provides an accurate and efficient method for computing the resonant frequency,radiation patts, etc. Using continuou
The magnetic anisotropy of Fe25Ni75 nanocrystallites in the range of 10～20 nm was measured by the law of approach to saturation. The samples were prepared by mec