High-performance large-diameter thick-walled austenitic stainless steel forged tube for nuclear power and its short-process preparation method
An austenitic stainless steel, high-performance technology, applied in electric furnaces, mechanical equipment, metal processing equipment, etc., can solve the problems of many forging defects and long production process of forging tubes for nuclear power, to reduce forging heating times and save energy. resources, the effect of improving utilization
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[0041] Correspondingly, a short-process preparation method of a high-performance large-diameter thick-walled austenitic stainless steel forged tube for nuclear power of the present invention specifically includes the following process:
[0042] The preparation process of the stainless steel forged pipe is: batching → electric furnace smelting → AOD refining → steel ingot → head / tail cutting → electroslag remelting → electroslag hollow ingot → radial forging → pipe → solution aging heat treatment → machining → acid Wash → product. The specific process is as follows:
[0043] In the first step, the ratio of raw materials is carried out according to the above component contents. In order to avoid the gas in the raw materials from being brought into the smelting furnace, the raw materials are baked and put into the electric arc furnace for smelting. During the smelting process, common cullet (mainly composed of Na 2 O CaO 6SiO 2 ) as a slagging material, the amount added is abou...
Embodiment 1
[0051] According to the content of each component of the high-performance large-diameter thick-walled austenitic stainless steel wrought tube for nuclear power of the present invention described above, the content of different components of the austenitic stainless steel wrought tube product in each embodiment is shown in Table 1.
[0052] The chemical composition (wt%) of the embodiment of table 1
[0053]
[0054] In the embodiment of the present invention, the short-process preparation process of the above-mentioned high-performance large-diameter thick-walled austenitic stainless steel forged pipe for nuclear power, the preparation process includes: batching→electric furnace smelting→AOD refining→steel ingot→head / tail cutting→electroslag Remelting→electroslag hollow ingot→radial forging→pipe→solution aging heat treatment→machining→pickling→product. The specific operation process is as follows.
[0055] The first step is to carry out the proportioning of raw materials a...
Embodiment 2
[0064] In the first step, the ratio of raw materials is carried out according to the content of 2 components. In order to avoid the gas in the raw materials from being brought into the melting furnace, the raw materials are baked and then added to the electric arc furnace for melting. During the melting process, common cullet (mainly composed of Na 2 O CaO 6SiO 2 ) as a slagging material, the amount added is about 3.0wt% of the total weight of the raw materials. After the raw materials are completely melted into molten steel, reduce the power of the electric furnace to keep the melting temperature at 1650 ° C, and tilt the furnace to remove slag, and then add low-carbon ferromanganese Deoxidize with ferrosilicon, then increase the power of the electric furnace to make the molten steel temperature reach 1680°C, and perform multi-point aluminum deoxidation, respectively feed aluminum at 4 or 8 points at the radius of 1 / 2 of the melting furnace mouth, and the speed is about 1.5kg...
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