采用PREP方法制备K390粉末，进行热等静压烧结，烧结温度为1180℃，烧结压力120MPa，烧结时间2h。烧结坯分别经过1100℃，1150℃，1180℃三个淬火温度，相同的回火工艺（深冷和550℃回火三次）后。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。

K390 powder was prepared by PREP method and sintered by hot isostatic pressing. The sintering temperature was 1180 ℃, the sintering pressure was 120MPa, and the sintering time was 2h. After the sintered billet has been quenched at 1100 ℃, 1150 ℃ and 1180 ℃ respectively, and the same tempering process (cryogenic and 550 ℃ tempering for three times). 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.