Radiant energy – Radiation controlling means – Shields
Reexamination Certificate
2007-01-30
2007-01-30
Berman, Jack I. (Department: 2881)
Radiant energy
Radiation controlling means
Shields
C228S199000, C228S214000, C228S223000, C148S024000, C148S026000, C250S506100, C420S046000, C420S064000, C420S106000, C420S108000, C420S112000, C420S121000
Reexamination Certificate
active
11076943
ABSTRACT:
A stainless steel slab containing B, wherein a protecting material is joined onto at least two faces across the bloom from each other in a stainless steel bloom containing B of 0.3–2.5 mass %, being integrated into one-piece by forming a weld metal comprising a stainless steel with chemical composition that satisfies the relationship expressed by following formulas (1)–(4), and a method to produce a steel product by rolling said slab. Further, it is preferable to interpose an insert material between above stainless steel bloom and above protecting material in bonding process.in-line-formulae description="In-line Formulae" end="lead"?15≦Creq≦30, (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?4≦Creq−Nieq≦17, (2)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Creq=Cr+1.5 Si+Mo−5 B, (3)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Nieq=Ni+30 (C+N)+0.5 Mn (4)in-line-formulae description="In-line Formulae" end="tail"?Herein, each symbol of a chemical element designates the content (mass %) of relevant chemical element contained in steel. Accordingly, it makes it possible to subject a stainless steel slab containing B to hot working without generating edge cracking, so as to be used as a source material of a neutron shielding container and a separator of a fuel cell.
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Ishida Kazuhiro
Morisaki Hideo
Ogawa Kazuhiro
Yamamoto Hideaki
Yazawa Takeo
Berman Jack I.
Clark & Brody
Sumitomo Metal Industries Ltd.
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