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| Experimental research on the mechanical properties of gray cast iron used in paper drying cylinders |
| LIU Kexiu,FENG Xiaoliang,LI Maodong,MA Kuo,LI Lushui |
| Guangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou 510663, China |
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| Guide |
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Abstract In order to make a more accurate judgment on the mechanical properties of the gray cast iron paper dryers that have been in service for a long time, different methods were used to conduct hardness tests and tensile tests on a 62-year continuous service dryer gray cast iron material, and the test results perform comparative analysis. The test results show that there is a large deviation between the test results of the D-type impact device Leeb hardness tester and the laboratory bench-top Brinell hardness tester. It is not suitable to use the D-type impact device Leeb hardness tester for the gray cast iron paper dryer on-site inspection. The test results of the G-type impact device Leeb hardness tester are relatively close to those of the laboratory bench-top Brinell hardness tester, and the deviations of the test results of different parts are also quite different. There is no difference between the hardness and strength of gray cast iron materials obvious linear correspondence, it is recommended to combine microstructure inspection and other methods to comprehensively judge the material performance status.
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Received: 06 July 2021
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2022, Vol. 40 
