锻压技术

锻造对12Cr2Ni4A钢棒料性能的影响

英文标题：Influence of forging on properties of 12Cr2Ni4A steel bar

作者：于淼

关键词：齿轮疲劳夹杂物锻造冲击性能

分类号：TG123.32

出版年,卷(期):页码：2022,47(4):74-77

摘要：

齿轮由于原材料存在大尺寸脆性夹杂物会产生连续疲劳断裂，为了研究锻造对夹杂物的分布和材料力学性能的影响，采用了金相、冲击、扫描电镜及能谱微区分析等方法，对问题原材料锻造后的夹杂物分布、冲击性能、断口形貌等进行了分析，并与正常原材料进行了比对。结果表明：经过锻造，夹杂物的分布明显改善，条状夹杂物已破碎，未见大尺寸超标夹杂物，夹杂物呈弥散分布，评级符合标准要求；材料的横向冲击性能改善效果显著，提升幅度达到75%。经试验和分析得出：经锻造后，棒料的夹杂物分布和冲击性能已达到正常原材料的水平，可满足齿轮的使用要求。

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.

基金项目：

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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