催化裂化装置再生滑阀导轨螺栓断裂的失效分析

doi:10.3969/j.issn.1006-8805.2020.05.012

Petro-chemical Equipment Technology ›› 2020, Vol. 41 ›› Issue (5): 59-62.doi: 10.3969/j.issn.1006-8805.2020.05.012

• INSPECTION AND MAINTENANCE TECHNOLOGY • Previous Articles Next Articles

Failure Analysis on Bolt Fracture of Regenerative Sliding Valve Guidein Catalytic Crackers

Zheng DuanYang¹, Nan Guangli²

1. Henan Chemical Technician College, Kaifeng, Henan, 475000;
2. Henan Fengli Petrochemical Co., Ltd., Puyang, Henan, 457000

Received:2020-06-01 Accepted:2020-09-25 Online:2020-09-25 Published:2020-09-25

Abstract

Abstract: Thefracture causes of the regenerative sliding valve guide bolt (GH4033) were analyzed through chemical composition and mechanical performance analysis, tensile test, meta-llographic analysis, fracture morphology and energy spectrum analysis. The results show that the bolt fracture is a high temperature creep fracture. The main cause of the bolt fracture is material lattice defects (lattice vacancies caused by impurity silicon) and intergranular fractures due to carbide precipitation in high temperature environments.

Key words: catalytic cracking/FCC, regenerative slide valve, bolt, fracture, high temperature creep

Zheng DuanYang, Nan Guangli. Failure Analysis on Bolt Fracture of Regenerative Sliding Valve Guidein Catalytic Crackers[J].Petro-chemical Equipment Technology, 2020, 41(5): 59-62.

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Failure Analysis on Bolt Fracture of Regenerative Sliding Valve Guidein Catalytic Crackers

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