Stainless steels for high-purity gases which are superior in non-dusting characteristics required at the time of welding, corrosion resistance and non-catalytic property and which can be widely utilized in the manufacturing process of semiconductors, liquid crystal displays or the like. The austenit
Stainless steels for high-purity gases which are superior in non-dusting characteristics required at the time of welding, corrosion resistance and non-catalytic property and which can be widely utilized in the manufacturing process of semiconductors, liquid crystal displays or the like. The austenitic stainless steels of the present invention are characterized by having decreased Mn, Al, Si and O contents. The austenitic stainless steels meet the non-dusting characteristics which are required at the time of welding. In addition, corrosion resistance, abrasion resistance and machinability are improved. The ferritic and the duplex stainless steels of the present invention are characterized in that they can readily form thereon a Cr oxide layer when subjected to oxidation treatment. The ferritic and two-phase stainless steels are superior in corrosion resistance to corrosive gases, and contain non-catalytic property against chemically-unstable gases.
대표청구항▼
[ What is claimed is:] [1.] Austenitic stainless steel for high-purity gases, characterized by comprising 10 to 40% by weight of Ni, 15 to 30% by weight of Cr, 0 to 7% by weight of Mo, 0 to 3% by weight of Cu, 0 to 3% by weight of W, 0.005 to 0.30% by weight of N, 0 to 0.02% by weight of B, 0 to 0.0
[ What is claimed is:] [1.] Austenitic stainless steel for high-purity gases, characterized by comprising 10 to 40% by weight of Ni, 15 to 30% by weight of Cr, 0 to 7% by weight of Mo, 0 to 3% by weight of Cu, 0 to 3% by weight of W, 0.005 to 0.30% by weight of N, 0 to 0.02% by weight of B, 0 to 0.01% by weight of Se, and Fe and unavoidable impurities as the remaining part, provided that the impurities contain 0.03% by weight or less of C, 0.50% by weight or less of Si, 0.20% by weight or less of Mn, 0.01% by weight or less of Al, 0.02% by weight or less of P, 0.003% by weight or less of S and 0.01% by weight or less of O, and that the Ni-bal. value obtained from the following equation is 0 or more and less than 2: EQU Ni-bal.=Ni eq.-1.1.times.Cr eq.+8.2 reNi eq.(%)=%Ni+%Cu+0.5%Mn+30 (%C+%N)Cr eq. (%)=%Cr+1.5%Si+%Mo+%W.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (1)
Natesan Krishnamurti (Naperville IL), Iron-based alloys with corrosion resistance to oxygen-sulfur mixed gases.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.