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为了提高车轮的使用寿命，进行了用氰化物强化和增加钢中含碳量的试验研究。采用氰化物强化和增加钢中含碳量相结合的措施可提高钢的硬度和疲劳强度，从而提高车轮的使用寿命。在环形线上两年多时间试验，以及线路实物试验，证实这些措施对提高车轮寿命是极为有效的。介绍了试验情况和试验结果。
In order to improve the service life of the wheels, experimental studies have been conducted to enhance and increase the carbon content of the steel with cyanide. The combination of cyanide reinforcement and increased carbon in steel increases the hardness and fatigue strength of the steel and thus increases the service life of the wheel. More than two years of testing on the toroid and in-circuit testing of the lines confirmed that these measures were extremely effective in increasing wheel life. Introduced the test situation and test results.