MIM Fe基合金的合金化强化

研究金属粉末注射成形铁基合金在强还原性氢气氛烧结条件下的合金化强化效果，结果表明，添加Ｃｕ、Ｎｉ、Ｍｏ等元素能取得显著的固溶强化效果，其中成分为Ｆｅ－２Ｎｉ－２Ｃｕ－０．４５Ｍｏ的机械性能达到σｂ＝４８３ＭＰａ，σｓ＝３４０ＭＰａ，δ＝９％和ＨＲＢ８３。     

低合金耐海水腐蚀钢在模拟腐蚀环境下的耐蚀性能研究

以普碳钢为对比样,采用模拟海水全浸和间浸、盐雾、湿热等加速腐蚀实验并结合电化学测试技术研究了Cu-Cr-Mo系低合金耐海水腐蚀钢Q345C-NHY3的耐蚀性能.结果表明：在各种模拟环境条件下与碳钢相比Q345C-NHY3钢都具有较好的耐蚀性能.     

钕含量对Mg-Cu-Nd非晶合金贮氢性能的影响

通过溶体快淬成功制备了（Mg65Cu25）100-xNdx（x=2，5，7，10）非晶／纳米晶贮氢合金，利用透射电镜、x射线衍射仪和差热分析仪研究了合金的微观组织结构及其热性能，采用ARBINBTW-2000型电池测试仪研究了合金的贮氢性能。结果表明：随着钕含量的增高，合金的贮氢量呈现上升趋势。非晶（Mg65Cu25）93Nd7合金具有最好的贮氢动力学性能和贮氢容量，最高贮氢量达到3．O％（质量分数），而纳米晶（Mg65Cu25）98Nd2具有最低的贮氢动力学性能和贮氢容量。研究还表明，随着钕含量的增高，合金的非晶形成能力增强，非晶的这种独特的短程有序结构是提高贮氢性能的主要因素。     

空心微球表面化学镀Ni薄膜的工艺研究

比较空心微球表面化学镀Ni薄膜的工艺.分别以Sn-Pd胶体溶液和[Ag(NH3)2]+溶液作为活化剂,将空心微球表面进行活化,再采用化学镀的方法分别在其上淀积金属Ni薄膜.使用扫描电子显微镜(SEM)、能量色散光谱(EDS)和X-射线衍射光谱(XRD)对两种工艺所镀Ni薄膜的表面微观结构和组分进行表征.结果表明:用Sn-Pd胶体溶液活化后的空心微球表面淀积了均匀、致密的金属Ni薄膜,该薄膜是由大小约100 nm的颗粒组成;而以[Ag(NH3)2]+溶液活化后的空心微球表面淀积的金属Ni薄膜,是由大小约1 μm的颗粒组成.并分析了这两种镀层形成的机理.     

Airslip结晶器内凝固壳形成特性分析

根据Airslip结晶器的传热特性,建立了凝固壳厚度和临界凝固壳厚度的数学模型.理论分析和实验结果表明,凝固壳厚度与铸造速度的乘积为常数,铸造速度增大,凝固壳厚度减小,铸锭表面质量提高;铸造速度的波动引起凝固壳厚度的波动,降低了铸锭的表面质量;铸锭直径和铸造速度的乘积也为常数,铸锭直径增大,铸造速度相应减小.     

Feedrate optimization and tool profile modification for the high-efficiency ball-end milling process

Trend in die/mold machining is to produce highly quailed surface using the high-speed hard machining with the ball-end cutter. The ball-end milling is, however, less efficiency than the flat end milling. It is important to optimize the feedrate that gives the maximum material removal rate constrained by an allowable surface roughness. The state-of-art of the CBN ball-end cutter technology allows increasing the tooth feed for high-speed and high-efficiency machining. However, because the spherical shape of the cutter can result in the scallop-liked cusps on the machined surface, the surface roughness consideration makes a feedrate limitation to the CBN cutter. In this paper, the optimization of the feedrate by considering the generated-scallop effect of the ball-end cutter has been studied. It was found that the tooth feed must be kept within one third of the path pick in order to keep the feed-interval scallop height not over the path-interval scallop height. Therefore, the potential capability of the CBN cutter for the larger tooth feed (i.e. high efficient) machining can not be fully exploited. It was found a notch-cut on the center of the ball-end cutter reduced the feed-interval cusp height, thus allowing an increased feedrate of more than 50% compared with the standard ball-end cutter. If the parameters of the notch-cut profile can be optimized, it is believed that the feedrate can be further increased.     

氰化氢在终冷塔中气液两相之间转移的研究

分析了煤气中氰化氢的形成,论述了氰化氢在煤气和其冷凝液中的平衡机理,讨论了影响氰化氢相平衡的因素,研究了直接终冷、间接终冷时煤气中氰化氢的转移情况。     

15%毒死蜱烟雾剂防治甘蔗绵蚜田间药效试验

15％毒死蜱烟雾剂对甘蔗绵蚜具有良好的防治效果。用15％毒死蜱烟雾剂100、150、200m1／667m^2的田间防效1-10天均在98．6％以上，可作为甘蔗绵蚜防治中的轮换用药。田间使用以100—150ml／667m^2为宜。     

我国人工皮革发展机遇的探讨

介绍了国外超细纤维人工皮革的产销与应用情况．追溯了国际上这一领域最新技术的进展．通过对国内未来几年市场需求的分析与预测，提出了应在高起点上发展我国人工皮革的思路。     

合成气制二甲醚的研究进展

简要介绍了合成气制二甲醚的原理，工艺流程，双功能催化剂以及近年来的发展状况。