Preparation method for high-quality 40Cr alloy structural steel hot rolled coil rod

A kind of alloy structural steel, high-quality technology, applied in the field of iron and steel metallurgy and ferrous metal pressure processing, can solve the problem that the microstructure and proportion are not optimized, restrict the application of 40Cr alloy structural steel, the reduction of area rate and the qualified rate of upsetting Low-level problems, to achieve excellent plasticity and toughness, cold heading deformation ability, less inclusions, and improved upsetting deformation ability
CN106929622AActive Publication Date: 2017-07-07WUKUN STEEL
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUKUN STEEL
Publication Date
2017-07-07

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Abstract

The invention discloses a preparation method for a high-quality 40Cr alloy structural steel hot rolled coil rod. The preparation method comprises the following steps of A, hot metal pretreatment desulfurization, B, molten steel smelting, C, deoxygenation alloying, D, molten steel LF furnace refining, E, molten steel VD furnace vacuum refining, F, molten steel casting, G, billet heating, and H, controlled rolling and controlled cooling. The high-quality 40Cr alloy structural steel hot rolled coil rod produced through the method is high in steel cleanliness and fewer in occluded foreign substance and has high-strength as well as excellent plastic toughness and cold heading machining deformation capacity, the production requirement of a high-level fastener is met, and steel gas content and the occluded foreign are greatly reduced.
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Description

technical field

[0001] The invention belongs to the technical field of iron and steel metallurgy and ferrous metal pressure processing, and in particular relates to a method for preparing a high-quality 40Cr alloy structural steel hot-rolled round wire rod. Background technique

[0002] 40Cr alloy structural steel is one of the most widely used steel types in the machinery manufacturing industry. It has good processability and mechanical properties, and has good low-temperature impact toughness, plasticity, wear resistance and low notch sensitivity. It is widely used in the production of household appliances , office supplies, gears, main shafts, crankshafts, eccentric shafts, oil pump rotors, sliders, worms, collars, sleeves, pins, connecting rods, screws, nuts, intake valves of equipment such as automobiles, motorcycles and machine tools Manufacture of other parts. The processing and manufacturing process of parts made of 40Cr is complicated, and they are generally import...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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