高锰钢辙叉堆焊技术在莱钢铁路运输中的应用

介绍了高锰钢辙叉各种堆焊技术的特点、高锰钢的力学性能、焊机焊条的选择和堆焊工艺在750m^2铁水运输线编组站成功的应用。     

J2-030龙门刨床的技术改造

本文介绍了J2―030龙门刨床的技术改造情况,通过改造,使龙门刨床的故障停机率大大降低,加工能力显著增强,取得了较大的经济效益。     

电弧离子镀氮化铬涂层的高温氧化

利用电弧离子镀设备在1Cr11Ni2W2MoV不锈钢基体上沉积了CrN涂层,对涂层的抗氧化性能进行了研究.结果表明,CrN氧化生成Cr2O3,氧化反应激活能小于Cr和Cr2N的氧化反应激活能,具有低的氧化速率常数,抗氧化性能良好.氧化过程中发生CrN向Cr2N的相转变,涂层中大的压应力的存在对这一转变起了关键作用.     

Deposition of photocatalytic TiO2 and N-doped TiO2 films by arc ion plating

TiO2 and N-doped TiO2 films were deposited on the glass substrates by arc ion plating method. The results show that the deposition rate does not change with the increasing deposition time. The increase of mass flow rate of N2 gives rise to the increase of deposition rate. All as-deposited TiO2 and N-doped TiO2 films are amorphous. The anatase TiO2 phase with preferred orientation （101） is acquired by post-annealing at 400 ℃ for 2 h. The incorporation of N into the TiO2 films and the heat treatment extensively shift the band edge to the visible light region.     

SYJN-1降粘剂在北三台地区的应用

针对现场出现的稠油清理困难,我们试制了SYJN-1降粘剂,在北三台地区的应用中取得了很好的现场效果。     

以客户为导向

以客户为导向、提供超于行业标准的高质量支持服务,这些都是甲骨文公司很重要的目标。为此,甲骨文公司在服务方面从人员、手段两方面加强了力度。已有的努力,使得甲骨文公司在IT服务年会上获得了多项大奖;未来的拼搏,则将协助甲骨文公司更好地发展。     

电子政务 神州巡礼

中国电子政务示范工程总体专家组专家汪玉凯认为,现在还没有一个真正的一级政府可以说成功实施了电子政务,预计正处于电子政务推进过程中的城市将会出现几个示范典型。各个城市的电子政务发展各有千秋,借鉴其它城市的经验教训,对于自身的电子政务工程建设大有裨益。这次,我们从北到南精选了5个大城市,介绍它们在电子政务方面的进展。     

高校学生党员教育管理工作研究

认为探索新时期学生党员教育的新形式、新方法,使学生党员教育和管理工作有特色、有成效,是当前高校党建工作的重要任务.分析了高校学生党员教育管理工作存在的问题与原因,提出了加强学生党员教育和管理工作的措施.     

Effect of partial pressure of reactive gas on chromium nitride and chromium oxide deposited by arc ion plating

The effects of reactive gas partial pressure on droplet formation, deposition rate and change of preferred orientation of CrN and Cr2O3 coatings were studied. For CrN coatings, as nitrogen partial pressure increases, the number and size of droplets increases, the deposition rate initially increases obviously and then slowly, and the preferred orientation of CrN changes from high-index plane to low-index one. For Cr2O3 coatings, with the increase of oxygen partial pressure, the number and size of droplets decreases, the deposition rate decreases and the （300） becomes the preferred orientation. These differences are ascribed to the formation of CrN （with a lower melting point） and Cr2O3 （with a higher melting point） on the surface of Cr target during the deposition of CrN and Cr2O3. Complete coatings CrN or Cr2O3 film can be formed when reactive gas partial pressure gets up to 0. l Pa. The optimized N2 partial pressure for CrN deposition is about 0.1-0.2 Pa in order to suppress the formation of droplets and the suitable 02 partial pressure for Cr2O3 deposition is approximately 0.1 Pa for the attempt to prevent the peel of the coating.     

Incomplete transformation of Ti-Ni-X ternary shape memory alloy

If the reverse transformation of a shape memory alloy is arrested, a kinetic stop will appear in the next complete transformation. The kinetic stop temperature has a close relation with the previous arrest temperature. This kinetic stop can be regarded as a ＂memory＂ of the previous arrest temperature. This phenomenon is named temperature memory effect（TME）. The TME induced by incomplete cycling in Ti-Ni-Nb and Ti-Ni-Cu alloys was systematically investigated by performing either a single incomplete cycle, or a sequence of incomplete cycles with different arrested temperatures. The results indicate that TME only exists in the heating process, and TME can occur both in B 19＇→B2 and B 19→B2 reverse transformation during heating process. But, there is no evidence of TME during cooling in the Ti-Ni-X ternary alloys. And the reverse transformation temperature interval （At-As） of the Ti44-Ni47-Nb9 alloy induced by TME can be significantly enlarged compared with that of the Ti-Ni-Cu alloy by performing multi-times incomplete transformation cycling with a decreasing order arrested temperature.