Semi-solid-state milling technology of cast iron plate material

A semi-solid, cast iron technology, used in metal rolling and other directions, can solve the problems of semi-solid continuous casting process design and control theory that have not been formed, cannot be solved, and cannot be lubricated by slag, and achieve low mechanical properties and production efficiency. The effect of low power and excellent cutting performance

Inactive Publication Date: 2007-01-17
NANJING NANGANG IND DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There has been some progress in the research of semi-solid continuous casting technology and semi-solid continuous casting and rolling technology for iron and steel materials at home and abroad, but: ①The conditions such as forced convection, low superheat, and small temperature gradient required in the semi-solid continuous casting process of iron and steel materials are difficult to meet and Effective control; ② The material properties or key technologies used in the mechanical stirring or electromagnetic stirring equipment for preparing semi-solid continuous casting slurry cannot be solved at present, and are still being explored and researched at home and abroad; ③ Semi-solid steel continuous casting slabs There are special requirements for the lubrication between mold and mold, and mold flux in traditional continuous casting cannot be used for mold lubrication; ④ The theory of semi-solid continuous casting process design and control has not yet been formed

Method used

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  • Semi-solid-state milling technology of cast iron plate material
  • Semi-solid-state milling technology of cast iron plate material

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Embodiment 1

[0027] Embodiment 1: manufacture gained cast iron billet with mold casting or continuous casting method, the cross-sectional shape of cast iron billet is the square of 50mm * 50mm, length is 800mm, and chemical composition (mass percentage) is 2.1%C, 1.4%Si, 0.6% Mn, 0.1% P, 0.1% S, the semi-solid rolling process steps of rolling it into a 10mm thick cast iron plate are: ① die casting method to prepare a square cast iron billet with a cross-sectional size of 50 mm × 50 mm; ② preheat the billet to 1080°C for 2 hours and then cooled to room temperature; ③Reheat the billet to 1180°C for 60s and then enter the double-roller rolling mill for rolling. The deformation rate of the billet is 1s -1 ;④The rolled cast iron plate is properly water-cooled to 760-850°C, and then enters the follow-up annealing furnace for annealing treatment. The temperature in the annealing furnace is 780°C, and the annealing time is 10 minutes, and then slowly cooled to below 660°C and air-cooled After reac...

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Abstract

A semi-solid rolling technology for cast iron plate includes such steps as pretreating the cast iron plate, induction heating to become semi-solid, dual-roller rolling, proper cooling, and annealing. The thickness of cast iron plate can be regulated within 0.5 mm-50mm, the strength of extension is more than 400 MPa and the enlongation is greater than 5%.

Description

technical field [0001] The present invention is a semi-solid rolling process of cast iron slabs, which involves heating pretreated cast iron slabs to a semi-solid temperature through double-roll rolling to obtain cast iron slabs with a certain thickness, and then proceeds to follow-up heat treatment after proper cooling. Annealing in a furnace to obtain a cast iron plate belongs to the technical field of metal pressure processing. Background technique [0002] Cast iron material has certain mechanical properties, its low cost, excellent cutting performance and vibration damping performance; its plate products are used to manufacture boxes and shells with vibration sources, which can greatly reduce vibration or noise; The obtained heat exchange device, while maintaining high thermal conductivity, corrosion resistance and low price, overcomes the shortcomings of cast heat exchangers such as bulkiness and lack of aesthetics, and also avoids the high price and poor corrosion res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/46
Inventor 颜银标刁岳川庄建志李翔章大庆徐海英
Owner NANJING NANGANG IND DEV CO LTD
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