浅述如何防止汽轮机爆炸事故的发生

文章分析汽轮机发生爆炸事故的各种潜在的可能因素，提出应注意防范的一些问题。     

小功率钢板壳电动机的结构设计和工艺改进

介绍了钢板电机的结构设计和工艺改进措施。重点剖析了不同形式的通风系统和钢板壳加工工艺，并进行了性能比较。     

Hydrogen Absorption and Release Behavior in Hydrogen Decrepitation Process of Nd-Fe-B Alloys

The behavior of hydrogen absorption and release in hydrogen decrepitation (HD) process of Nd-Fe-B alloys were investigated. The results reveal that the reactivity and the amount of hydrogen absorption in HD process are related to the surface activity of the alloy so that the fresh and active surface has a higher efficiency. The presence of Nd-rich phase at the grain boundary is an essential factor of the HD activity of the alloy at room temperature. On degassing, hydrogen is released from the HD powder continuously with increasing temperature. And the residual hydrogen is as low as 0.0015% at 1073K, which shows that the hydrogen is almost exhaused. It is feasible to remove the hydrogen from the HD powder by heating treatment at the temperature of 523-723K for 1h prior to the magnetic field forming in order to decrease the harmful effect of hydrogen on the easy axis alignment of HD magnet.     

LZ-DT300A电梯直流门机调速控制器

现介绍并推荐一种已被国家知识产权局专利局授予发明专利权，公告在即的电梯直流门机调速控制技术(专利申请号：00129816．X)。在这种系统控制驱动下的门机，运行平稳安静，流畅自然。特别是，该系统结构简单、使用便利、节能环保、安全可靠、经济实用等特点，更显示出其不可比拟的技术优势。下面就其主要特点，结合示图进行简要介绍。     

国内外永磁铁氧体的发展

永磁铁氧体具有现代永磁材料的优点,即经济性(低成本),在永磁材料的应用领域,单以产量(吨位)而论,铁氧体至今仍占据90％以上的份额。但是,为了与性能占压倒优势     

25Cr2NiMov钢锻件的热处理

文章介绍了国产３００ＭＷ汽轮发电机组低压转子用２５Ｃｒ２ＮｉＭｏＶ钢锻件的热处理工艺特点。如锻件在锻后热处理中采用二次重结晶处理来细化晶粒，并通过提高淬火加热温度、激冷淬火和施行适当的回火温度，使综合力学性能全面满足设计要求，特别是低的ＦＡＴＴ５０值使转子在冷启动时也不致发生脆性断裂。     

重油催化裂化装置轴流风机的损坏与修复

广州分公司炼油厂重油催化裂化装置四机组轴流风机在 1998年 9月由于入口消音器故障引发重大事故 ,严重影响了装置生产。该文主要针对其损坏的原因、情况和修复方法作了探讨和论述