【Mechanical Equipment Technology Exchange Edition】Mechanical Equipment 【Daily Question】20190619
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Question: What are the key requirements for fastener materials when operating at high temperatures? There are no answers provided for this series of posts; fellow netizens are free to share their own opinions – just reply with what you understand. Replies earn rewards ranging from 5 to 15 points; all forum members are welcome to participate actively and support the development of the forum! ! ! Chemical Equipment and Machinery
Fastener materials used in high-temperature environments should first possess good resistance to relaxation; secondly, they should have low sensitivity to stress concentration and thermal brittleness, as well as excellent oxidation resistance.
Fastener materials used in high-temperature environments should first possess good resistance to relaxation; secondly, they should have low sensitivity to stress concentration and thermal brittleness, as well as excellent oxidation resistance.
For threaded fastener materials used at high temperatures, it is required to have high resistance to relaxation, sufficient strength, low notch sensitivity, good resistance to high-temperature oxidation and creep, as well as a certain level of high-temperature endurance strength.
The key requirement for fastener materials used in high-temperature environments is good resistance to relaxation; followed by low sensitivity to stress concentration and low thermal brittleness； It should also have good antioxidant properties.
Fastener materials used in high-temperature environments should first possess good resistance to relaxation; secondly, they should have low sensitivity to stress concentration and thermal brittleness, as well as excellent oxidation resistance.
It should have good resistance to relaxation; secondly, it should be less sensitive to stress concentration and exhibit lower thermal brittleness, as well as good oxidation resistance.
Fastener materials used in high-temperature environments should first possess good resistance to relaxation; secondly, they should have low sensitivity to stress concentration and thermal brittleness, as well as excellent oxidation resistance.
Fastener materials used in high-temperature environments should first possess good resistance to relaxation; secondly, they should have low sensitivity to stress concentration and thermal brittleness, as well as excellent oxidation resistance.
1. Good resistance to relaxation, ensuring that after a designed operating cycle, the residual tightening stress of the bolt remains above the minimum sealing stress even at a lower pre-tightening stress； 2 Good combination of strength and ductility, with low sensitivity to creep notches ； 3 The tissue is stable, with little tendency to thermal brittleness ； 4 Good oxidation resistance