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A stainless steel, in-situ technology, applied in the field of stainless steel, can solve the problems of labor cost, energy, environmental protection and management, and achieve the effects of superior mechanical properties, good welding performance and excellent corrosion resistance
Inactive Publication Date: 2011-08-24
陈才金
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Problems solved by technology
To this end, it is necessary to use a complete set of sophisticated heat treatment equipment, an...
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Embodiment 1
[0022] The in-situ cast stainless steel of the present invention uses steel scrap (O8F), scrap nickel-chromium stainless steel, ferroalloys such as trace elements niobium and molybdenum as raw materials, and its composition (weight %) is: 0.06%C, 19.50%Cr, 7.20%Ni, 1.50% %Mo, 1.50%Mn, 0.8%Nb, 1.00%Si, 0.02%S, 0.03%P, 0.05Re, 0.12%N, and the balance is Fe.
[0023] The mechanical properties are listed in Table 2.
Embodiment 2
[0025] The composition (weight %) of the in-situ cast stainless steel of the present invention is: 0.02%C, 18.2%Cr, 5.82%Ni, 0.08%Mo, 4.7%Mn, 0.40%Nb, 0.80%Si, 0.028%S, 0.04%P, 0.05Re, 0.08%N, the balance is Fe.
[0026] The mechanical properties are listed in Table 2.
Embodiment 3
[0028] The composition (weight %) of the in-situ cast stainless steel of the present invention is: 0.10%C, 21.00%Cr, 9.51%Ni, 2.50%Mo, 1.80%Mn, 0.95%Nb, 1.50%Si, 0.01%S, 0.04%P, 0.07Re, 0.22%N, the balance is Fe.
[0029] The mechanical properties are listed in Table 2.
[0030] Table 2
[0031] .
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Abstract
The invention relates to an in-situ cast stainless steel which comprises the following components in percentage by weight: 0.01-0.12% of C, 15.00-22.00% of Cr, 5.00-10.00% of Ni, 1.00-2.50% of Mo, at most 5.00% of Mn, 0.02-1.00% of Nb, 0.80-2.00% of Si, at most 0.03% of S, at most 0.06% of P, at least 0.02% of Re, 0.05-0.30% of N and the balance of Fe. The heat-treatment-free in-situ cast stainless steel has the advantages of fine structure, higher yield strength and toughness than traditional similar nickel-chromium stainless steel, acid/alkali corrosion resistance, favorable machinability, favorable weldability, environmental protection and energy saving, has favorable stress corrosion cracking resistance, crevice corrosion resistance, corrosion wear resistance and cavitation corrosion resistance especially in a chloridion-containing medium and a sea water corrosion environment, does not need excellent heat treatment equipment, and lowers the cost by about 20% as compared with the traditional stainless steel.
Description
technical field [0001] The invention relates to a stainless steel, in particular to an in-situ casting stainless steel without heat treatment. Background technique [0002] Since the invention of stainless steel with chromium or nickel-chromium as the main element for more than 100 years, there are more than 100 kinds of stainless steel with grades in the world. In order to ensure that these stainless steel products have excellent performance, they generally have to go through smelting→casting (casting) → forging (or rolling) → heat treatment → machining and a series of processing processes. And the process of smelting→casting (casting)→heat treatment is necessary. Among them, the heat treatment process has always been used to change the internal crystal structure and organizational state of cast, forged, and rolled products, and to eliminate the phenomena or defects such as coarse grains, wide grain boundaries, impurity accumulation, and serious composition segregation rem...
Claims
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Application Information
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