Manufacturing method of 1cr15ni36w3ti alloy forged and rolled bar for nuclear power

Abstract

The invention discloses a manufacturing method for the forged materials and rolled bar materials of a 1Cr15Ni36W3Ti alloy, for nuclear power, and aims at increasing the room-temperature strength and the high-temperature strength of the alloy. The following technical scheme is adopted: a non-vacuum induction and electroslag smelting method is adopted, and the strength of the alloy under room temperature and high temperature is increased through dispersion strengthening for carbides in the alloy; fine crystal gains can be obtained by controlling the heating temperatures of forging cogging, forging forming and rolling; the crystal gains can be recrystallized by controlling the temperatures of finish forging, forging forming and finish forging, and finish rolling; and the single-hammer reduction amount of a cogging process of a high-speed forging machine is controlled to be 60mm-80mm, the machining ratio reaches 3-5, and the total deformation amount of finish forging is controlled to be 30%-50%. Maintenance for the uniformity and consistency of the interior structure and performance of the alloy is benefited through the reasonable machining ratio and deformation amount, and the phenomena of coarse crystal grains and mixed crystals are effectively avoided. The manufacturing method disclosed by the invention has the following beneficial effects: the gaps of a production process for the 1Cr15Ni36W3Ti alloy in China are filled, the room-temperature and high-temperature performance of the alloy are improved, and the manufacturing method is successfully applied to manufacturing for nuclear power equipment in China.

Description

technical field

[0001] The invention belongs to the field of metal material manufacturing, and in particular relates to a method for manufacturing 1Cr15Ni36W3Ti alloy forgings and rolled bars for nuclear power. Background technique

[0002] This alloy is an iron-nickel-based heat-strength alloy, and the original Russian designation is З612, ХН35ВТ. The alloy is a single austenite structure, which is solid-solution strengthened by chromium and tungsten elements. The higher content of manganese in the alloy plays an anti-oxidation effect, and the appropriate content of titanium element is conducive to the formation of γ′ phase, which is beneficial to improve the quality of the alloy. room temperature and high temperature strength. Due to the good thermal strength of the alloy, the durability at a temperature of 650°C can reach 50,000 hours to 100,000 hours. It is mainly used for gas turbine blades, discs, rotors and connecting parts. In addition, due to its good high tempera...

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