23号车钩是为适应5～6千吨列车牵引需要而设计的,机、货车均适用的一种新型高强度车钩。在采用ZG25Ⅱ普通碳素铸钢和工厂现行常规工艺的条件下,23亏车钩的静拉破坏吨位能稳定在300吨力以上,达到了《TB1335-78》的规定。 本文简要地介绍了23号车钩的设计,以及为提高和稳定强度对设计方案进行的几次修改演变的情况,并且分析了工艺因素对车钩强度的影响。 The No. 23 coupler is a new type of high strength coupler designed to meet the traction needs of 5-6,000 tons of trains and trucks. Under the condition of adopting ZG25Ⅱ ordinary carbon steel casting and the current conventional process in the factory, the static pull failure tonnage of the 23 deficit coupler can be stabilized at 300 tons or more, reaching the requirement of “TB1335-78”. This paper presents a brief introduction to the design of coupler 23 and the evolution of several modifications to the design to improve and stabilize the strength. The effect of process factors on the coupler strength is also analyzed.