Novel Blasting-Like Lubricating Process for Cold Extrusion

doi:10.1007/s12204-023-2599-6

J Shanghai Jiaotong Univ Sci ›› 2024, Vol. 29 ›› Issue (2): 322-329.doi: 10.1007/s12204-023-2599-6

• Materials Science and Engineering • Previous Articles Next Articles

Novel Blasting-Like Lubricating Process for Cold Extrusion

用于冷挤压的新型类喷丸润滑工艺

CHEN Haitang^1,2 (陈海棠), HU Chengliang^1,2* (胡成亮), GONG Aijun³ (龚爱军), SHI Weibing³ (施卫兵), ZHAO Zhen^1,2 (赵震)

(1. Institute of Forming Technology & Equipment, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China; 2. National Engineering Research Center of Die and Mold CAD, Shanghai Jiao Tong University, Shanghai 200030, China; 3. Jiangsu Sunway Precision Forging Co., Ltd., Yancheng 224100, Jiangsu, China)
（1. 上海交通大学材料科学与工程学院塑性成形技术与设备研究所，上海200030；2. 上海交通大学模具CAD国家工程研究中心，上海200030；3. 江苏双威精锻有限公司，江苏盐城224100）

Received:2022-01-28 Accepted:2022-03-25 Online:2024-03-28 Published:2024-03-28

Abstract

Abstract: A blasting-like lubricating process (combination of shot blasting and lubricating processes) is proposed. In this process, the specimens to be treated, alloy shots, and solid lubricating powder are rotated together in a roller. The surface pockets formed due to the impact by the shots can store lubricants, and the lubricant can also adhere to the specimen surface by hitting. The effects of process parameters, including rolling time, rotational speed, mass of alloy shots, and the diameter of shots, on the surface topography of the steel specimen are investigated using 13 experimental schemes. The distribution ratio and average depth of surface pockets on the defined areas of the specimen are quantitatively analyzed. Four selected schemes with the MoS2 solid lubricating powder are further carried out to lubricate the cylindrical billets, and the lubricating effect is evaluated using the steady combined forward and backward extrusion test. The indicated friction factor of the novel blasting-like process is smaller than that of the conventional phosphate-soap coating process.

Key words: blasting-like process, lubricating, surface pocket, friction factor, cold extrusion

摘要： 本文提出了一种类喷丸润滑工艺，即喷丸和润滑工艺的结合。在这个过程中，待处理的试样、合金丸和固体润滑粉末一起在滚筒中旋转。由于丸料的冲击而形成的表面凹坑可以储存润滑剂，而润滑剂也可以通过撞击粘附在试样表面。采用13个实验方案，研究了滚动时间、转速、合金丸的质量和丸的直径等工艺参数对钢试样表面形貌的影响。定量分析了试样规定区域内表面凹坑的分布比例和平均深度。进一步采用MoS2固体润滑粉末的四个方案对圆柱形钢坯进行润滑，并使用稳定的前后挤压组合试验来评估润滑效果。结果表明新型类喷丸工艺的摩擦系数小于传统磷酸盐-肥皂涂层工艺。

关键词: 类喷丸工艺，润滑，表面凹坑，摩擦系数，冷挤压

CLC Number:

TG376.3

CHEN Haitang^1,2 (陈海棠), HU Chengliang^1,2* (胡成亮), GONG Aijun³ (龚爱军), SHI Weibing³ (施卫兵), ZHAO Zhen^1,2 (赵震). Novel Blasting-Like Lubricating Process for Cold Extrusion[J]. J Shanghai Jiaotong Univ Sci, 2024, 29(2): 322-329.

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Novel Blasting-Like Lubricating Process for Cold Extrusion

用于冷挤压的新型类喷丸润滑工艺

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