Design and Realization of Reliability Enhancement Test for Breech Mechanism of Large-Caliber Guns

Cao Lijun,Xu Tong,Ding Chao,Yu Guibo,Wang Shuhai

Table 5 Sample surface hardness of worn area and unworn area

Test surface 1 2 3 4 Worn area 563.1 535.7 558.3 527.6 Unworn area 458.2 458.7 452.3 463.1 Test surface 5 6 7 Worn area 559.9 565.1 559.5 Unworn area 457.1 461.9 461.9