论文部分内容阅读
首先研究了热处理温度对Ｎｉ－Ｐ，Ｎｉ－Ｐ－ＳｉＣ化学镀层结构和硬度的影响，然后系统研究了ＳｉＣ颗粒粒度及浓度对Ｎｉ－Ｐ－ＳｉＣ镀层显微硬度的影响。用ＸＲＤ测定了镀层结构，用金相显微镜观察了镀层组织。结果表明，加入ＳｉＣ能增加Ｎｉ－Ｐ镀层的显微硬度。两种镀层经４００℃热处理后显微硬度均达到最大值。４００℃热处理后，Ｎｉ－Ｐ－ＳｉＣ镀层硬度随ＳｉＣ浓度增加而单调增加，随ＳｉＣ粒径的变化有一最大值。
The effects of heat treatment temperature on the structure and hardness of electroless Ni-P and Ni-P-SiC coatings were studied. The effects of SiC particle size and concentration on the microhardness of Ni-P-SiC coatings were systematically investigated. The structure of the coating was measured by XRD and the microstructure of the coating was observed with a metallographic microscope. The results show that adding SiC can increase the microhardness of Ni-P coating. The microhardness of both coatings reached the maximum after heat treatment at 400 ℃. After 400 ℃ heat treatment, the hardness of Ni-P-SiC coating monotonically increases with the increase of SiC concentration, and has a maximum with the change of SiC particle size.