摘要:
This invention relates to a welding material of ferrite-austenite two-phase stainless steel capable of producing a weld metal having a high resistance to corrosion, particularly in an environment containing nitric acid, and the method of application therefor. The welding material consists essentially of not more than 0.03% of C, not more than 2.0% of Si, not more than 2.0% of Mn, 25 to 30% of Cr, 7 to 12% of Ni, not more than 0.35% of N, and the balance Fe and inevitable impurities. The Ni balance value given by the following formula ranges between -11.7 and -6.7:Ni balance value=Ni%+0.5.times.Mn%+30.times.(C+N)%-1.1 (Cr%+1.5.times.Si%)+8.2.
摘要:
This invention relates to a welding material for welding a high-Si austenite stainless steel, capable of ensuring a high corrosion resistance of the weld metal in hot nitric acid of high concentration, while maintaining a toughness of the weld metal not smaller than 2 Kg-m/cm.sup.2, and the method of application therefor. The welding material has a composition containing not greater than 0.015% of C, 5 to 7% of Si, not greater than 2% of Mn, 15 to 20% of Cr, 10 to 22% of Ni, not greater than 0.02% of N, not greater than 0.45% of one or both of Nb and Ta, and the balance substantially Fe and inevitable impurities the sum of C and N contents is selected to be not greater than 0.03% and the sum of Nb and Ta contents is selected to be not smaller than 15.times.(C+N)%. The Ni-balance value given by the following formula ranges between -4 and -2.Ni balance value=% Ni+30(%C+%N)+0.5(%Mn)-1.1(%Cr+1.5.times.%Si)+8.2
摘要翻译:本发明涉及一种用于焊接高Si奥氏体不锈钢的焊接材料,其能够确保焊接金属在高浓度热硝酸中的高耐蚀性,同时保持焊接金属的韧性不小于2Kg- m / cm 2及其应用方法。 该焊接材料的组成为:C:不大于0.015%,Si:5〜7%,Mn:2%以下,Cr:15〜20%,Ni:10〜22%,Ni: N,不大于Nb和Ta中的一种或两种的0.45%,余量基本上为Fe和不可避免的杂质,C和N含量的总和被选择为不大于0.03%,并且选择Nb和Ta的总和 不小于15x(C + N)%。 由以下公式给出的Ni平衡值范围介于-4和-2之间。 Ni平衡值=%Ni + 30(%C +%N)+0.5(%Mn)-1.1(%Cr + 1.5x%Si)+8.2
摘要:
This invention relates to a manufacturing process for plate or forging (bar, stamp work or the like) of ferrite-austenite two-phase stainless steel, containing C at 0.03% or below, Si at 2.0% or below, Mn at 2.0% or below, Cr at 25 to 35%, Ni at 6 to 15%, N at 0.35% or below, and Fe and inevitable impurity for the remainder with or without adding B at 0.001 to 0.030% with the following nickel balance value specified at -3 to -9 and comprising an average crystal grain size at 0.015 mm or below from heating an ingot of the above mentioned ferrite-austenite two-phase stainless steel at 1,200.degree. C. or below and keeping a forging ratio by hot working at 5 or over.Ni balance value=Ni %+0.5 Mn %+30.times.(C+N) %-1.1(Cr %+1.5 Si %)+8.2