The studying results indicated that : three typical microstructures were abtained when ct20 alloy were annealed under different temperature , that is , equiaxed microstructure ( annealed at t1 , t2 and t3 ) , bimodal microstructure ( annealed at t4 and t5 ) and lamellar microstructure ( annealed at t6 ) . the effect of microstructure on rt tensile properties was weak , while at 20k was notable 研究表明： ct20合金冷轧态管材通过热处理可以获得三种典型的组织类型，即等轴组织( t1 、 t2和t3制度) 、双态组织( t4和t5制度)和片状组织( t6制度) ；显微组织对ct20合金的室温性能影响不大，而对20k下性能的影响则较明显。
Abstract : the crystal structures obtained by static solidification and vibration solidification were compared . it was showed that , in the case of vibration solidification , the orientation growth of the columnar crystal was not obvious , the equiaxial crystal appeared more early . the grains of both types of crystals were quite fine , hardness in the full section was relatively high , and the hardness distribution was uniform . in the former case , the solute segregation in dendritical austenite more severe , and there were lumps of distortion inclusion 文摘:对球铁金属型静凝固与振动凝固的结晶组织对比表明：后者柱状晶方向性生长较弱，等轴晶出现较早，且两者的晶粒均较细，全断面硬度较高且分布均匀；前者枝晶奥氏体内溶质偏析大，有畸变夹杂团块。
This algorithm has high implementing speed and good reliability , because it makes use of opengl ' s high ability of process display buffer , deep buffer and stencil buffer efficiently . unlike the isometric projection algorithm this algorithm can display workpiece from any direction . 5 我们充分利用了opengl提供的高速处理颜色缓存、深度缓存和模板缓有的功能，使得实现的算法不仅运行速度快、稳定，而且克服了等轴测投影算法不能在任意角度显示工件加工过程的缺陷，具有一定的先进性。
