E316h type stainless steel submerged arc welding welding material for fast neutron reactor equipment manufacturing and preparation method thereof

Abstract

The invention discloses E316H stainless steel submerged arc welding welding material for fast neutron reactor equipment manufacturing and a preparation method thereof. The mass percentage of each element of the welding core in the welding wire: C: 0.05%-0.07%, Si: 0.10%-0.30% , Mn: 1.25%~2.0%, P≤0.005%, S≤0.005%, Cr: 18.0%~20.50%, Ni: 10.0%~12.0%, Mo: 2.20% or 2.25%, Cu≤0.020%, Co≤ 0.010%, B≤0.0005%, Nb≤0.01%, As≤0.005%, Sn≤0.002%, Sb≤0.001%, and the balance is Fe. The mass percentage of each component of the flux is: magnesium oxide: 8-15%, aluminum oxide: 20-40%, calcium fluoride: 30-40%, marble: 5-10%, ferrosilicon (Si-Fe): 2 to 4%, metal chromium: 2 to 4%, the mass percentage of O element and H element of the deposited metal obtained by matching the welding wire and the flux is 0.047, and the mass percentage of H element is 0.0008. The deposited metal of the present invention has high strength at room temperature and high temperature , good impact toughness, and low content of [H] and [O], which can meet the welding of 316H austenitic stainless steel for fast neutron reactors, and can also be used for welding of other 300 series austenitic stainless steels.

Description

technical field [0001] The invention relates to the field of welding materials, and relates to an E316H type austenitic stainless steel submerged arc welding wire and flux and a preparation method thereof. Background technique [0002] The fast neutron reactor can increase the utilization rate of natural uranium resources from about 1% to more than 60% of the currently widely used pressurized water reactor in nuclear power plants; it can transmute the long-lived radioactive waste produced by the pressurized water reactor to achieve the smallest radioactive waste. change. As the fourth-generation nuclear power reactor, fast neutron reactor can realize the recycling of fast reactor and pressurized water reactor fuel, and is the leading product of future nuclear power development. The development and promotion of fast reactor technology is of great significance to promoting the sustainable development of my country's nuclear power and the establishment of an advanced fuel cycl...

AI Technical Summary

Problems solved by technology

Moreover, 316H austenitic stainless steel is used for the manufacture of fast reactor vessels, internal components and cocks. It is used for load-bearing and pressure-bearing components. The welding volume is large. Not only does the weld seam require corrosion resistance, but it also requires extremely high room temperature strength, high temperature strength, and high temperature durability. At the same time, strict requirements are put forward for [H] and [O] in the weld deposit metal. At present, there are no welding rods that fully meet the conditions at home and abroad.

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