【Daily Question No. 289】October 22, 2018
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【Daily Question No. 289】October 22, 2018: Briefly describe the role of the Mo element in Cr–Mo steel. ①Increase the strength of the material ； ②Increase the thermal strength of the material, that is, improve its creep strength ； ③Improve resistance to hydrogen erosion under high temperature and pressure conditions ； ④Low-alloy molybdenum steel has a tendency to graphitize, so some other alloying elements need to be added. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
①Molybdenum can increase the strength of materials； ②Increase the thermal strength of the material, that is, improve its creep strength ； ③Improve resistance to hydrogen erosion under high temperature and pressure conditions ； ④Low-alloy molybdenum steel has a tendency to graphitize, so some other alloying elements need to be added
①Molybdenum can increase the strength of materials； ②Increase the thermal strength of the material, that is, improve its creep strength ； ③Improve resistance to hydrogen erosion under high temperature and pressure conditions ； ④Low-alloy molybdenum steel has a tendency to graphitize, so some other alloying elements need to be added.
Improve resistance to hydrogen corrosion at high temperatures and pressures, enhance hardenability, and suppress temper brittleness
①Molybdenum can increase the strength of materials； ②Increase the thermal strength of the material, that is, improve its creep strength ； ③Improve resistance to hydrogen erosion under high temperature and pressure conditions ； ④Low-alloy molybdenum steel has a tendency to graphitize, so some other alloying elements need to be added.
1. Improve the thermal strength of the material, that is, enhance its creep strength. 2. Improve its resistance to hydrogen erosion under high temperature and pressure conditions
①Molybdenum can increase the strength of materials； ②Increase the thermal strength of the material, that is, improve its creep strength ； ③Improve resistance to hydrogen erosion under high temperature and pressure conditions ； ④Low-alloy molybdenum steel has a tendency to graphitize, so some other alloying elements need to be added.