High strength hot rolled steel sheet useful in automotive body component, comprises alloying composition of carbon, manganese, silicon, phosphorus, sulfur, aluminum, niobium and titanium, nitrogen, and iron
	CHINTHA A R; PATHAK P
	2023-07-03
专利权人	TATA STEEL LTD (TAST-C)
申请日期	2023-07-03
专利号	IN202331044448-A
成果简介	NOVELTY - High strength hot rolled steel sheet, comprises alloying composition of: 0.02-0.06 wt.% carbon; 0.8-1.3 wt.% manganese; 0.1-0.4 wt.% silicon; 0.0001-0.015 wt.% phosphorous; 0.0001-0.005 wt.% sulfur; 0.03-0.05 wt.% aluminum; combination proportion of up to 0.25 wt.% niobium and titanium; 0.0001-0.006 wt.% nitrogen; and iron being remainder of the composition along with incidental elements, where the microstructure of the sheet comprises 10-50 vol.% of bainitic ferrite phase and balance being polygonal ferrite phase. USE - The steel sheet is useful in automotive body component (claimed) e.g. in buildings, maritime vehicles, tools, automobiles, machines, and bridges. ADVANTAGE - The method enables manufacture of high-strength hot-rolled steel sheet with high yield strength, ultimate tensile strength of 540-700 MPa, and yield strength of 490-575 MPa with hole expansion ratio of greater than 100%. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) manufacturing the steel sheet; and (2) automotive body component comprising the steel sheet. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the flowchart illustrating a method for producing high strength hot rolled steel sheet. 101Casting stage 102Heating stage 103Hot working stage 104Rapid Cooling stage 105Coiling stage
IPC 分类号	C21D-008/02 ; C21D-009/46 ; C22C-038/02 ; C22C-038/04 ; C22C-038/12
国家	印度
专业领域	材料科学
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/21428
专题	中国科学院新疆生态与地理研究所
作者单位	TATA STEEL LTD (TAST-C)
推荐引用方式 GB/T 7714	CHINTHA A R,PATHAK P. High strength hot rolled steel sheet useful in automotive body component, comprises alloying composition of carbon, manganese, silicon, phosphorus, sulfur, aluminum, niobium and titanium, nitrogen, and iron. IN202331044448-A[P]. 2023.

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