穿孔頂頭等離子噴涂涂層殘余應(yīng)力分析

Analysis on Residual Stress in Plasma-sprayed Coating of Piercing Plug

摘要: 提出采用在頂頭上噴涂等離子涂層的方法來提高穿孔頂頭表面性能,從而提高其使用壽命,降低生產(chǎn)成本。采用有限元計算軟件ANSYS對等離子噴涂過程進行瞬態(tài)分析,得到穿孔頂頭與涂層內(nèi)部的溫度分布狀況,在此基礎(chǔ)上分析頂頭與涂層界面處和涂層內(nèi)部的應(yīng)力狀態(tài),討論了頂頭預(yù)熱溫度、涂層厚度、涂層材料等因素對殘余應(yīng)力的影響,得出合理的噴涂工藝,為提高穿孔頂頭的使用壽命提供理論依據(jù)。

Abstract: It is proposed to get the piercing plug sprayed with a plasma coating in a bid to enhance its surface properties, and thus prolong its service life, and cut down the operation costs as well. With employment of the ANSYS FEM calculation software, transient state analysis of the plasma-spraying process is conducted, which leads to identification of the internal temperature distributions of both the piercing plug and the coating. Based on the result, the stresses at the plug-coating interface and inside the coating are analyzed, and influential elements related to the residual stress discussed, including the plug preheating temperature, the coating thickness, and the coating material, etc, resulting in a proper spray-coating process, and theoretic basis for enhancing service span of the piercing plug.