共搜索到2681条信息，每页显示10条信息，共269页。用时：0小时0分0秒464毫秒
EFFECT OF CARBON CONTENT ON MICROSTRUCTURE AND PROPERTIES OF HIGH STRENGTH AND HIGH ELONGATION STEELS D.X.Lou1,S.K.Pu1,B.F.Xu2,X.Chen1,A.M.Guo1,Z.X.Yuan2,Y.Chen2,S.B.Zhou1,P.H.Li1 (1.Technical...-rolled high strengthand high elongation steels with retained austenite were studied by discussing the in-fluence of different carbon content. The research results indicate that carbon contenthas......
......
on the boundaries become thicker with increasing Sr content. The ultimate tensile stress(UTS) and elongation are improved compared with the corresponding Sr-free alloy. After preliminary hot-extruding, the UTS is up to 308-320 MPa and elongation reaches 8.0%-13.5%. After double hot-extrusion, the dynamic recrystallization completes totally, and the UTS is up to 310-355 MPa, but the elongation does not change......
......
, and its elongation increases from 5.5% to 13.8%.The increase of the strength is related to the rising of the kinds of the phase which is coherent or semi-coherent to the matrix, the size of the particles, distribution heterogeneous and the percentage of the second phase volume. The increase of the elongation is related to the improvement of the alloy plasticity by precipitate free zone caused......
by (-196 ℃, 12 h)+(200 ℃, 12 h) for 4 times. There was some decrease in ultimate strength but some increment in elongation when treated by (-196 ℃, 12 h)+(250 ℃, 12 h). However, the ultimate strength abruptly decreases to 307 MPa and the elongation increases to 5.6% when the samples are treated by (-196 ℃, 12 h)+(300 ℃, 12 h), and the mechanical properties are stable at this level as the number......
......
不锈钢带拉矫过程变形行为的数值模拟研究孙朝阳1,张栋1,张清东1,李实2,蔡永跃2(1.北京市北京科技大学机械工程学院2.宁波宝新不锈钢有限公司,浙江宁波 315807)摘 要:建立了不锈钢拉伸弯曲矫直过程的有限元仿真模型,该模型针对不锈钢拉矫机辊组配置和旋转压下的特点,采用了窄条三维壳单元对带钢进行特征建模.为提高计算效率,带钢网格进行了局部细化.对304不锈钢典型规格带钢拉矫过程进行模拟,伸长率计算值与实测值吻合较好.对带钢拉矫过程特征位置点经过各辊组的应力应变分析表明:带钢伸长率主要由1号弯曲辊组提供,而......
. The results of tensile tests showed that the Mg-4Li-3(Al-Si) alloy exhibited the highest ultimate tensile strength (UTS) of 249 MPa but the lowest elongation of 6.3%. The Mg-12Li-3(Al-Si) alloy had the highest elongation of 26% but the lowest UTS of 173 MPa. The different mechanical properties were attributed to the different crystal structures of the three alloys and the precipitate with different......
bending test without brittle fracture at room-temperature, the elongation ratio of spheroidized as-cast specimen is 15.7% while the tensile strength σb is 259.5MPa. The ingot is hot-forged at 850℃ to sheet... gradually during the bruising process. Key words: Ni-graphite alloy; plastic deformation; fiber-like microstructure; elongation ratio <上一页 1 2 3 4 5 6 7 8 9 10 ... 269 下一页 >
