Manufacturing method for forged materials and rolled bar materials of 1Cr15Ni36W3Ti alloy, for nuclear power
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A manufacturing method and bar technology, which are applied in the field of rolling bar manufacturing and 1Cr15Ni36W3Ti alloy forgings for nuclear power, can solve the problems of inability to obtain technical materials, no production process and references, technical confidentiality, etc., and can improve room temperature and high temperature. performance effect
Active Publication Date: 2018-09-28
FUSHUN SPECIAL STEEL SHARES
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The main difficulty in alloy production: 1Cr15Ni36W3Ti alloy has been produced in Russia as a nuclear power material, but due to technical confidentiality, relevant technical materials cann
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Embodiment 1
[0030] Rolled bar finished product specification: φ50mm
[0031] The alloy was smelted into ingots by non-vacuum induction furnace + electroslag remelting. The chemical composition is shown in Table 2.
[0032] Table 2
[0033]
[0034] The steel ingot is billeted to a 210mm octagonal billet by a 3150t fast forging machine. The heating temperature of the first fire for billet opening is 1060°C, and the heating temperature of the second fire is 1020°C. The temperature is 800°C; the heating temperature of 1800t precision forging billet opening is 1020°C, the total deformation is 30%, the surface is good, and the final forging temperature of precision forging is 850°C.
[0035] After the billet is polished, the surface is guaranteed to be free of defects, and it is used for rolling. The heating temperature of the first rolling fire is 1040°C, and the heating temperature of the second fire is 1020°C. During the heating process, the billet temperature is uniform, and the final...
Embodiment 2
[0045] Forged bar finished product specification: φ140mm
[0046] The alloy was smelted into ingots by non-vacuum induction furnace + electroslag remelting. The chemical composition is shown in Table 5.
[0047] table 5
[0048]
[0049] The steel ingot is billeted to a 210mm octagonal billet by a 3150t fast forging machine. The heating temperature of the first fire for billet opening is 1060°C, and the heating temperature of the second fire is 1020°C. The temperature is 820°C; the heating temperature of 1800t precision forging billet opening is 1030°C, the total deformation is 50%, the surface is good, and the final forging temperature of precision forging is 830°C.
[0050] After forging, the bar is subjected to finished product heat treatment, water-cooled at 1090°C for 3030 minutes, and air-cooled after aging at 700°C for 50 hours.
[0051] After heat treatment, the finished bar is finished, inspected, and packaged after passing the surface inspection.
[0052] The t...
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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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