Experimental Study on Material Surface Modification of Tool Steel

This paper presents the surface temperature behavior of M42 high-speed tool steel samples during N^ implantation in an industrialized GLZ-100 metal-ion implantation machine.A detail study has been made on the parameters of N^ implantation.Optimized technical parameters have been preseted.The microhardness of the sample surface implanted under these parameters has been increased by a factor of 2.3.and the wear-resistance has been improved by about 5.4 times.The research on the mechanism of surface modification of M42 steel by nitrogen ion implantation has also been made.     

基于温度测量的钢水含碳量在线检测

介绍了钢水含碳量热分析在线检测系统的研制;以热分析测试理论为基础,通过实验得到钢水碳含量测试的数学模型;测试系统采用P89C52单片机为主机,热电偶信号的放大采用集成精密仪表放大器。该仪器具有较强的抗干扰能力,测试速度快、精度高。     

Monel-400合金管焊接工艺研究

针对Monel-400合金管的焊接,从焊接方法、焊接材料、坡口加工与组对、焊接工艺参数的确定等方面进行分析与改进,确定了其焊接工艺,解决了焊接中的热裂纹和气孔问题,保证了产品的焊接质量。     

塔设备分段吊装工艺路线分析及选择

在分析某化肥建设项目中二氧化碳吸收塔吊装作业过程的基础上,提出了重型吊车吊装大型设备的力学计算方法,介绍了该类设备吊装方法的选用、吊装工艺路线的建立、起重机械型号的选取等关键步骤及技术,有效提高了相关吊装方案的制作效率,解放了吊装方案工作人员的劳动力。     

Transport Simulation of ECRH H-Mode Experiments on HL-2A Tokamak

Transport simulation of ECRH H-mode experiments on HL-2A tokamak is carried out using ONETWO code,the GLF23 and PEDESTAL models,along with TORAY code for ECRH.It is found that the initial electron and ion temperature profiles affect L-H transition significantly,and larger initial temperature gradient at the edge plasma benefits the transition.The simulation results show that it is possible to achieve ECRH H-mode with appropriate initial electron and ion temperature profiles under present discharge conditions on HL-2A tokamak.In addition,the pedestal density,electron temperature and pedestal width are predicted,and the evolutions of electron and ion temperature profile are calculated.     

板孔式有弯矩平衡梁应用技术及研究

对吊装作业中广泛使用的板孔式有弯矩平衡梁在吊装载荷作用下的受力情况进行分析,结合工程应用给出了平衡梁设计技术路线及全面考虑多种因素影响下的强度计算公式,为施工企业平衡梁制造、设计的标准化提供依据。     

高职院校实践教学资源的开发与利用

实践教学是高职教育体系中的重要组成部分，在现代职业教育占有重要地位。本文结合我校骨干院校建设中实践教学资源的现状与建设，总结了化机专业实践教学资源的开发与利用情况。