Process for reducing cracks of 50Mn18Cr5 retaining ring forge piece
The invention relates to a technology for reducing cracks of a 50Mn18Cr5 retaining ring forge piece. The technology comprises the following steps that 1, the forge piece is smelted in an intermediate frequency furnace and subjected to vacuum degassing treatment; 2, solid solution heat treatment and...
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Main Authors | , , |
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Format | Patent |
Language | Chinese English |
Published |
25.01.2022
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Subjects | |
Online Access | Get full text |
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Summary: | The invention relates to a technology for reducing cracks of a 50Mn18Cr5 retaining ring forge piece. The technology comprises the following steps that 1, the forge piece is smelted in an intermediate frequency furnace and subjected to vacuum degassing treatment; 2, solid solution heat treatment and water cooling are carried out; 3, recrystallization annealing treatment is performed; 4, machining and forging are carried out; 5, quenching and high-temperature tempering are carried out for hardening and tempering; and low-temperature tempering is carried out. According to the method, the oxygen content is reduced through vacuum degassing treatment, generation of subsurface bubbles of a steel ingot in a bottom pouring method is reduced, a normalizing process before forging in conventional process production is replaced with a recrystallization annealing process, the structure state of the forge piece is improved, the mixed crystal structure phenomenon caused by rapid cooling of the forge piece is avoided, and the |
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Bibliography: | Application Number: CN202111130041 |