根据工厂“关于新造上游型蒸汽机车试运办法”的规定,机车竣工后,应在本厂专线试运往返30次,总距离为50km。在试运时,过去车轴时常超温(高于70℃)。从一九八二年起,我们对车轴超温情况进行了分析,找出了超温的主要原因,并从工艺上、装备上、加工组装上、检测上进行了努力,从而实现了连续四年零十个月 According to the “Provisional Measures on Newly Built Upstream Type Steam Locomotive”, the locomotive should be commissioned 30 times round trip and the total distance to be 50km after completion of the locomotive. In the trial run, the past often over-temperature axles (above 70 ℃). Since 1982, we have analyzed the over-temperature condition of the axles, identified the main causes of over-temperature, and worked hard on the process, equipment, processing and assembly, and testing so as to achieve continuous four Years and ten months