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| Preparation and mechanical properties of low oxygen MHC alloy sheet |
| ZHANG Xin，LIANG Jing，LIN Xiaohui，GAO Xuanqiao，XUE Jianrong，YANG Yichao |
| （Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China） |
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Abstract The low oxygen MHC alloy plates were prepared by powder metallurgy and hot rolling method. The microstructure,
and mechanical properties of low oxygen MHC alloy rolled plates were studied by chemical analysis,
metallographic analysis, hardness test, and tensile mechanical property test. The results show that molybdenum
powder reduction, and vacuum sintering, the oxygen content in the alloy can be effectively reduced by adjusting
C/Hf atomic ratio. The comparison of microstructure analysis and mechanical property test results of samples annealed
at different temperatures, the recovery stage of the alloy is below 1 300 ℃. With the increase of annealing
temperature, recrystallization begins at 1 300 ℃, the strength and hardness gradually decrease, and the plasticity increases.
The recrystallization is completed at 1 600 ℃. The low oxygen MHC alloy with complete recrystallization
has excellent plasticity.
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Received: 25 March 2022
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2023, Vol. 33 
