Typical case analysis of crane hook breakage accident
The following are 6 representative crane hook break accident case analyses, covering accident characteristics, failure mechanisms and industry lessons:
Case 1: High temperature fracture of metallurgical hook (a steel plant in 2021)
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Accident characteristics :
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The hook neck suddenly broke when lifting a 1580℃ molten steel ladle
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The cross section is a rock candy-like brittle fracture
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Failure analysis :
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The strength of material 34CrMo decreases by 62% at 600℃
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Brittleness caused by precipitation of σ phase at grain boundaries (confirmed by SEM)
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lesson :
The following are 6 representative crane hook break accident case analyses, covering accident characteristics, failure mechanisms and industry lessons:
Case 1: High temperature fracture of metallurgical hook (a steel plant in 2021)
-
Accident characteristics :
-
The hook neck suddenly broke when lifting a 1580℃ molten steel ladle
-
The cross section is a rock candy-like brittle fracture
-
-
Failure analysis :
-
The strength of material 34CrMo decreases by 62% at 600℃
-
Brittleness caused by precipitation of σ phase at grain boundaries (confirmed by SEM)
-
-
lesson :
The following are 6 representative crane hook break accident case analyses, covering accident characteristics, failure mechanisms and industry lessons:
Case 1: High temperature fracture of metallurgical hook (a steel plant in 2021)
-
Accident characteristics :
-
The hook neck suddenly broke when lifting a 1580℃ molten steel ladle
-
The cross section is a rock candy-like brittle fracture
-
-
Failure analysis :
-
The strength of material 34CrMo decreases by 62% at 600℃
-
Brittleness caused by precipitation of σ phase at grain boundaries (confirmed by SEM)
-
-
lesson :
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