The Evaluation Method of Derailment Stabili ty and the Practical Example MA Wei hua, et al. ( m ale, born in 1979, graduat e st udent for master degree, Locomot ive & Rolling St ock Research Inst it ute of Southwest Jiaot ong U niversit y, Chengdu 610031, China) Abstract: Several st andards on evaluat ion of t he w heel set derailment stabilit y are described. With t he SIM PACK simulat ion soft ware, a 2C 0 t ype met er -g age locomot ive model is set up. Diff erent met hods are used in evaluation of t he derailm ent st abilit y, and the evalua t ion result s are analyzed. Key words: st ability ; st andard; derailment; rolling st ock; t rack Research and Analysis of the High Speed Bearings for Rai lway Passenger Cars in Our Country SUN Zhen - hua ( male, born in 1965, engineer, T echnical Re search Depart ment of Sifang Rolling Stock Research In st it ut e of China Beiche Group, Qingdao 266031, Chi na) Abstract: T he applicat ion features of high speed bearings f or passenger cars abroad are described ge nerally. Wit h the specif ic condit ions of railway in our count ry, t he application mode of hig h speed bearings is put forward, t he st ruct ure is analyzed, and t he re - levant technical param et ers are calculated and analyzed. Key words: high speed bearing; structure; param eter; operat ion performance Setting Up the Model for Dynamic Strength Analysis of Qingzang Official Car DONG L i, et al. ( m ale, born in 1973, graduat e st udent for master degree of eng ineering , High Speed T rain Research Cen t er of Zhongnan Universit y, Changsha 410075, China) Abstract: T he car -body structure of Qingzang offi cial cars is analyzed. With the f inite element analysis met hod, t he calculat ion model for dynamic strengt h of car - body is set up on the basis of t he elast omer. Key words: Qingzang of ficial car; structure ana lysis; multi body dynamics; sett ing up of model Bei jing Batong Line Metro Bogie Wheel sets JIAO Pei hai, et al. ( male, born in 1971, engineer, Nanche Sifang L o comot ives & Rolling Stock Co. , L td. , Qingdao 266111, China) Abstract: Described are the design parameters, st ruct ure features and assembly technology of the SDB 80 bog ie w heel set assembly applied on Beijing Batong M et ro Cars and developed by Nanche Sifang L ocomo t ives & Rolling Stock Co. , Lt d. Key words: wheel set ; t echnical parameter; devel opment ; technology; assembly Brief Description of E14 1 Brake Cylinder XIAO Wei yuan, et al. ( male, born in 1974, graduat e student for master degree of eng ineering , Braking Research Instit ute of M eishan Rolling Stock Works of China Nanche Group, M eishan 620032, China) Abstract: T he st ruct ure and performance f eatures of E14 1 type brake cylinders are described. Compari son and analysis are made w it h the same t ype of brake cylinders abroad. Key words: brake cylinder; freight car; develop ment ; E - 14; test The Car - Body Tilting System for X2000 Xinshisu EMUs YANG Yu, et al. ( m ale, born in 1972, graduat e st udent for master degree of engineering, T raff ic T ransport Inst itut e of Z hongnan Universit y, Changsha 410075, China) Abstract: T he design principles, syst em composi t ion of the car - body t ilting system for X2000 Xinshisu EM Us, as w ell as t he funct ional principles of each part in t he t ilt ing syst em, the syst emat ic monitoring and t he trouble diagnost ic funct ion are described. And the de sign paramet ers of t he car - body t ilt ing system are given. Key words: EMU; t ilt ing syst em; technical pa ramet er Effect of the Low Temperature Ion Sulphurization on the Wear Resistance Performance of Steel for Rol ling Bearings WANG Xu, et al. ( male, born in 1964, senior engineer, Beijing Jin dongfang Science and T echnology Development Co. , Lt d. , Beijing 100035, China) Abstract : Aft er carbonization and heat t reat ment for the carbonized bearing steel G20CrNi2Mo applied for the rolling bearings on railw ay cars, the processing of low tem perature ion sulphurizat ion is made. T he w ear and comparison t est on samples shows t hat, on account of t he self lubrication of sulphur, t he f riction factor of the sulphurized sample surf ace has been reduced by 27% ~ 37% com paring w it h the unsulphurized sample; t he w earing has been reduced by 85% ; t he anti burning and adhering load has been im proved by 20% ~ 90% w ith different speeds; U nder t he same loading condit ions, the t emperat ure rise due t o the f rict ion under t he same loading condit ions is about 12 low er. Key words: rolling bearing; low tem perature ion sulphurization; wear resist ance Application of PC Alloy Materials and Suggestions for Improvement JIANG Gui shan, et al.