将分别经过深冷与不经过深冷后的K390进行硬度、抗压强度、抗弯强度、冲击韧性和磨损体积的测试，切取10*10*10mm小块进行硬度测试；切Φ8mm*12mm的圆柱压缩样品，进行压缩实验；切5*5*20mm的长条状抗弯试样，进行弯曲实验；切10*10*55mm的无缺口冲击试样，进行夏比摆锤冲击实验；切20*10*5mm的试样进行摩擦磨损实验，实验载荷为35N，摩擦副采用SiC球，频率5Hz，摩擦距离不小于360m，最小摩擦行程10mm，磨损时间为60min。随后使用电子扫描显微镜观察其磨损形貌。研究深冷对力学性能与耐磨性的影响。

Test the hardness, compressive strength, bending strength, impact toughness and wear volume of K390 after deep cooling and without deep cooling, and cut 10 * 10 * 10mm small pieces for hardness test; cut Φ Compress the sample with 8mm * 12mm cylinder for compression test; Cut 5 * 5 * 20mm long strip bending specimen for bending test; Cut 10 * 10 * 55mm impact specimen without notch and conduct Charpy pendulum impact test; Cut 20 * 10 * 5mm sample for friction and wear test. The test load is 35N. The friction pair uses SiC ball with frequency of 5Hz. The friction distance is not less than 360m. The minimum friction stroke is 10mm. The wear time is 60min. Then the wear morphology was observed by scanning electron microscope. The effect of cryogenic treatment on mechanical properties and wear resistance was studied.