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.
CHEN Haitang1,2 (陈海棠), HU Chengliang1,2* (胡成亮), GONG Aijun3 (龚爱军), SHI Weibing3 (施卫兵), ZHAO Zhen1,2 (赵震)
. Novel Blasting-Like Lubricating Process for Cold Extrusion[J]. Journal of Shanghai Jiaotong University(Science), 2024
, 29(2)
: 322
-329
.
DOI: 10.1007/s12204-023-2599-6
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