US 12,447,718 B2
Multi-layer rolled composite board and manufacturing method therefor
Peng Xue, Shanghai (CN); Xiaodong Zhu, Shanghai (CN); Bo Yan, Shanghai (CN); and Sihai Jiao, Shanghai (CN)
Assigned to BAOSHAN IRON & STEEL CO., LTD., Shanghai (CN)
Appl. No. 17/780,124
Filed by BAOSHAN IRON & STEEL CO., LTD., Shanghai (CN)
PCT Filed Nov. 25, 2020, PCT No. PCT/CN2020/131388
§ 371(c)(1), (2) Date May 26, 2022,
PCT Pub. No. WO2021/104292, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 201911179893 (CN), filed on Nov. 27, 2019.
Prior Publication US 2022/0410533 A1, Dec. 29, 2022
Int. Cl. B32B 15/01 (2006.01); B21B 1/22 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/28 (2006.01)
CPC B32B 15/011 (2013.01) [B21B 1/22 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0247 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/22 (2013.01); C22C 38/28 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A multilayer rolled clad plate comprising a transition layer between two adjacent cladding layers, and a substrate layer, wherein the transition layer is an anisotropic steel plate, wherein the thickness of each layer of the anisotropic steel plate is less than 5% of the total thickness of the multilayer rolled clad plate,
wherein the anisotropic steel plate comprises the following chemical elements in weight percentages: C: 0.01-0.10%; Si: 0.01-0.5%; Mn: 0.5-2.5%; Al: 0.01-0.06%; Ti ≤ 0.06%; Cr ≤ 0.50%; Mo ≤ 0.30%; and a balance of Fe and unavoidable impurities;
wherein the substrate layer is a mild steel or a high strength steel;
wherein when the substrate layer is a mild steel, the mild steel comprises the following chemical elements in weight percentages: C: 0.0005-0.003%; Si: 0.001-0.01%; Mn: 0.1-0.5%; Al: 0.01-0.04%; Ti ≤ 0.06%; and a balance of Fe and unavoidable impurities; or the mild steel comprises the following chemical elements in weight percentages: C: 0.01-0.04%, Si: 0.01-0.05%; Mn: 0.1-0.5%; Al: 0.01-0.04%, and a balance of Fe and unavoidable impurities;
wherein when the substrate layer is a high strength steel, the high strength steel comprises the following chemical elements in weight percentages: C: 0.1-0.3%; Si: 1.3-2.0%; Mn: 1.5-3.0%; Al: 0.01-0.05%; Ti: 0.01-0.03%; Mo ≤ 0.3%; and a balance of Fe and unavoidable impurities; or the high strength steel comprises the following chemical elements in weight percentages: C: 0.05-0.15%; Si: 0.1-0.4%; Mn: 1.5-3.0%; Al: 0.01-0.05%; Ti: 0.01-0.03%; Cr: 0.4-0.6%, Mo: 0.1-0.3%; and a balance of Fe and unavoidable impurities; and
wherein the cladding layer is a mild steel, a high strength steel, a martensitic steel or a high precipitation strengthened steel;
wherein when the cladding layer is mild steel, the mild steel comprises the following chemical elements in weight percentages: C: 0.0005-0.003%; Si: 0.001-0.01%; Mn: 0.1-0.5%; Al: 0.01-0.04%; Ti ≤ 0.06%; and a balance of Fe and unavoidable impurities; or the mild steel comprises the following chemical elements in weight percentages: C: 0.01-0.04%, Si: 0.01-0.05%; Mn: 0.1-0.5%; Al: 0.01-0.04%, and a balance of Fe and unavoidable impurities;
wherein when the cladding layer is high strength steel, the high strength steel comprises the following chemical elements in weight percentages: C: 0.1-0.3%; Si: 1.3-2.0%; Mn: 1.5-3.0%; Al: 0.01-0.05%; Ti: 0.01-0.03%; Mo ≤ 0.3%; and a balance of Fe and unavoidable impurities; or the high strength steel comprises the following chemical elements in weight percentages: C: 0.05-0.15%; Si: 0.1-0.4%; Mn: 1.5-3.0%; Al: 0.01-0.05%; Ti: 0.01-0.03%; Cr: 0.4-0.6%, Mo: 0.1-0.3%; and a balance of Fe and unavoidable impurities;
wherein when the cladding layer is martensitic steel, the martensitic steel comprises the following chemical elements in weight percentages: C: 0.2-0.3%; Si: 0.1-0.5%; Mn: 1.0-1.6%; Al: 0.01-0.25%; B: 0.001-0.005%; Ti ≤ 0.05%; Cr ≤ 0.3%; Mo ≤ 0.2%; and a balance of Fe and unavoidable impurities;
wherein when the cladding layer is high precipitation strengthened steel, the high precipitation strengthened steel comprises the following chemical elements in weight percentages: C: 0.03-0.08%; Si: 0.1-0.4%; Mn: 1.0-1.5%; Al: 0.01-0.05%; Ti: 0.05-0.12%; and a balance of Fe and unavoidable impurities.