Material for overweight ring forging and manufacturing process for ring forging

Abstract

The invention discloses a material for an overweight ring forging. The material comprises the following chemical elements in percentage by weight: 0.41 to 0.45 percent of C, 0.17 to 0.37 percent of Si, 0.80 to 1.00 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 1.05 to 1.20 percent of Cr, less than or equal to 0.30 percent of Ni, 0.20 to 0.25 percent of Mo, less than or equal to 0.20 percent of Cu, 0.02 to 0.04 percent of Al and the balance of Fe, wherein the content of oxygen and hydrogen elements meets the following requirements: [O] is less than or equal to 20ppm, and [H] is less than or equal to 2.0ppm. A manufacturing method for the ring forging comprises the following steps of: blanking a steel ingot which comprises the components and is taken as a raw material, forging and preparing a blank, performing ring rolling, performing heat treatment, and machining to obtain the wind tower flange ring forging. The method is characterized in that a workpiece obtained after forging, blank preparation and ring rolling is roughly turned and then is subjected to heat treatment; and the heat treatment process comprises heat treatment after forging and hardening and tempering. The method is applicable to the manufacture of 28 tons of overweight ring forgings.

Description

technical field [0001] The invention relates to a 28t super-heavy ring forging, in particular to a material for the super-heavy ring forging and a manufacturing process of the ring forging. Background technique [0002] Super-heavy ring forgings are the main basic components of various large-scale and key equipment and devices necessary for the development of national economic construction, national defense industry and modern scientific undertakings. One of the main signs of the self-sufficiency of key technical equipment. my country attaches great importance to the development of the super-heavy ring forging manufacturing industry. Although a large amount of funds and manpower have been invested in the past 40 years, the industry has undergone important changes from small to large, from low to high, but so far, the domestic super-heavy ring forgings Compared with foreign countries, there is still a big gap in manufacturing capacity and technical level. Therefore, it is of...

AI Technical Summary

Problems solved by technology

The super-heavy ring forgings currently forged usually have defects such as low toughness, plasticity and hardenability, unstable quality, and cannot fully meet the requirements of use.

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