Transactions of Materials and Heat Treatment

Title：Influence of forging on properties of 12Cr2Ni4A steel bar

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ClassificationCode：TG123.32

year,vol(issue):pagenumber：2022,47(4):74-77

Abstract：

Continuous fatigue fracture can beformed in gears because of the large-sized brittle inclusions existing in raw materials. Therefore, in order to study the influence of forging on the distribution of inclusions and the mechanical properties of materials, the inclusions distribution, impact properties and fracture morphology of raw materials with problems after forging were analyzed by metallography, impact, SEM and EDS, which were analyzed and compared with the normal raw materials. The results show that after forging, the distribution of inclusions is improved significantly, the strip inclusions are broken, the oversized inclusions disappear, the inclusions is distributed diffusely, and the rating meets the standard requirements. The lateral impact properties of the material is improved significantly and increased by 75%. The conclusion after testing and analysis shows that after forging, the inclusions distribution and the impact properties of the bar reach the level of the normal raw materials, which meet the using requirements of gear.

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作者简介：于淼（1981-），男，学士，正高级工程师 E-mail：3436667625@qq.com

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