Abstract
1Cr13MoS is a kind of material with excellent corrosion resistance and good mechanical properties. Meanwhile, it also has good self-lubricating properties due to the presence of molybdenum disulfide phase inside the material and can be used as friction pair material in the pump. In this paper, the hardness, microstructure, distribution of the self-lubricating phase, friction and wear properties of 1Cr13MoS after heat treatment were studied. After quenching at 1000 °C and tempering at 520 °C, the hardness of 1Cr13MoS prepared by pyrometallurgy is higher than that of HB 350. The tempering sorbite structure is evenly distributed, and the self-lubricating phase MoS2 is discretely distributed on the substrate with the average size is about 6 μm, which leads to good friction and wear properties. It is worth noting that the 1Cr13MoS is actually operated as friction pair material on the water pump and has a significant wear improvement effect compared to the conventional 12% chrome steel series.
Highlights
1Cr13MoS is a kind of material with excellent corrosion resistance and good mechanical properties
The carbon content of the surface layer of the sample changed, which resulted in the difference in hardness and microstructure between the surface layer and interior as shown in
Since the hardness of the ring is lower than the hardness of the block, the base of the ring is more susceptible to wear and the surface fragments are torn and attached
Summary
12% chrome steel series is widely used for some key components in water pump such as impeller, guide vane, and wear ring due to its good heat resistance, cavitation resistance, and excellent mechanical properties [1,2]. Since the impeller and the wear ring operate in a water environment, it is not possible to reduce the friction by applying a lubricating medium between them. A self-lubricating material containing MoS2 phase was studied, which has excellent anti-friction and wear properties. It is suitable for the case with oscillating motion, such as a number of companies are trying to change the material of the friction pair or add lubricating medium in the turbine [6,7,8,9].
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