Effects of Pearlite on Thermal Fatigue and Wear Resistance of Gray Cast Iron Treated by Laser
Source abstract
Abstract
In order to improve the thermal fatigue and wear resistance of gray cast iron, the effects of pearlite on thermal fatigue and wear resistance of gray cast iron were studied, the microstructure of different pearlite contents (45% to 85%) and interlamellar spacing were characterized by optical microscopy and scanning electron microscopy (SEM), the microhardness was measured by automatic microhardness tester, and the thermal fatigue and wear resistance of varying pearlite content and interlamellar spacing have been tested separately. Then, the 45° mesh double combination model was processed by pulse laser on the specimens’ surfaces, and then thermal fatigue and wear tests were carried out. The finite element analysis software was used to investigate stress distributions during wear tests. The treated samples were compared with untreated samples afterward. The results show that due to the thermal fatigue and wear resistance of pearlite, samples with pearlite contents greater than or equal to 85%, and the samples with pearlite interlamellar spacing of 152nm, have the best thermal fatigue and wear resistance. After the laser treatment, the difference of pearlite contents and interlamellar spacing on thermal fatigue and wear resistance of gray cast iron was eliminated, which reduced the production cost and increased the service life of casting.
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Research context
OpenAlex topics: Metal Alloys Wear and Properties · High Entropy Alloys Studies · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
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