DHRE round steel production process

Abstract

The invention discloses a DHRE round steel production process. The process includes the following steps of firstly, performing electric-furnace smelting; secondly, generating oxidized slag; thirdly, performing slagging-off on molten steel; fourthly, performing LF refining; fifthly, performing vacuum degassing; sixthly, performing die casting with molten steel; seventhly, performing electroslag remelting; eighthly, performing hammer cogging; ninthly, performing annealing treatment; tenthly, performing peeling with a grinding wheel; and eleventhly, inspecting a product and putting the product into storage. By increasing the Mo content and controlling the Mo content to be 2.8-3.1%, hardenability and heat resistance can be easily improved, sufficient strength and creep resistance are kept at ahigh temperature, and the quality of round steel is greatly improved; by reducing the Si content and controlling the Si content to be 0.25-0.4%, plasticity and toughness of the steel can be easily enhanced, the converting temperature from plasticity to brittleness can be easily raised, and the quality of the steel is greatly improved; and by means of smelting of an electric arc furnace, refiningof an LF ladle, remelting of electroslag and refining treatment of grain, the content of impurities in the round steel can be easily reduced, stress can be easily eliminated, and the quality of the steel is improved.

Description

technical field [0001] The invention relates to the technical field of round steel production, in particular to a DHRE round steel production process. Background technique [0002] Round steel refers to a solid strip of steel with a circular cross section. Its specifications are expressed in diameter, in millimeters, such as "50mm" means a round steel with a diameter of 50 mm. [0003] Round steel is mostly alloy steel, with strong plasticity and a wide range of applications. It is used in construction, machinery manufacturing and mold industries. The general round steel has poor hardenability and heat strength. When quenching is required in the post-processing process, It is very prone to deformation and cracking, and the deformation resistance is poor in the high temperature process, and it is prone to creep, which reduces the quality of steel; the plasticity and toughness of general round steel are poor, and the temperature of plastic deformation and ductile deformation ...

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Problems solved by technology

[0003] Round steel is mostly alloy steel, with strong plasticity and a wide range of applications. It is used in construction, machinery manufacturing and mold industries. The general round steel has poor hardenability and heat strength. When quenching is required in the post-processing process, It is very prone to deformation and cracking, and the deformation resistance is poor in the high temperature process, and it is prone to creep, which reduces the quality of steel; the plasticity and toughness of general round steel are poor, and the temperature of plastic deformation and ductile deformation is low, and it is easy to Plastic deformation occurs; general round steel has low purity, and there are many impurities inside the steel, which can easily cause fracture during use and increase the difficulty of subsequent processing

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