公开(公告)号：US20210101194A1

公开(公告)日：2021-04-08

申请号：US16971149

申请日：2019-01-18

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasuyoshi HIDAKA ,  Yasuto HIGASHIDA ,  Naoya SHIRASAWA

IPC: B21B25/00 ,  C22C38/12 ,  C22C38/08 ,  C22C38/04 ,  C22C38/02 ,  C23C4/06 ,  C23C4/11 ,  C23C4/131

Abstract: A piercer plug with increased wear resistance is provided. A piercer plug includes: a plug body; and a sprayed coating formed on the surface of the plug body. The sprayed coating contains an iron-based alloy and oxides thereof. The chromium concentration determined by analyzing the sprayed coating with X-ray fluorescence analysis is 3 to 20 mass %.