Invention Grant
- Patent Title: Gradient-structured ultra-fine bainitic low-alloy rail steel and preparation method thereof
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Application No.: US18471144Application Date: 2023-09-20
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Publication No.: US12084737B2Publication Date: 2024-09-10
- Inventor: Zhinan Yang , Fucheng Zhang , Jianjun Wang , Hongguang Li , Zhuanqin Liang , Qingchao Wang , Changbo Liu , Dongyun Sun , Xinliang Gao , Chen Chen
- Applicant: Yanshan University
- Applicant Address: CN Qinhuangdao
- Assignee: YANSHAN UNIVERSITY
- Current Assignee: YANSHAN UNIVERSITY
- Current Assignee Address: CN Qinhuangdao
- Agency: Pilloff Passino & Cosenza LLP
- Agent Rachel K. Pilloff; Sean A. Passino
- Priority: CN 2211692832.5 2022.12.28
- Main IPC: C21D9/04
- IPC: C21D9/04 ; C21D1/84 ; C21D6/00 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/54
Abstract:
A gradient-structured ultra-fine bainitic low-alloy rail steel and a preparation method thereof are provided in the present application, belonging to the technical field of steel metallurgy. The rail steel to be treated is subjected to three thermal processing treatments so that the gradient-structured ultra-fine bainitic rail steel has a gradient structure consisting of a ferrite-pearlite dual phase microstructure and an ultra-fine bainite microstructure. The gradient structure of the present application enables the matrix of the rail to be a ferrite-pearlite composite phase structure, and only the surface layer of the service surface to be ultrafine bainite.
Public/Granted literature
- US20240218478A1 GRADIENT-STRUCTURED ULTRA-FINE BAINITIC LOW-ALLOY RAIL STEEL AND PREPARATION METHOD THEREOF Public/Granted day:2024-07-04
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