Patent ID: 8287805
Filing Date: 2012-10-16
Classification: B23K,B32B,C22C,F28F,Y10T

Abstract:
1. An iron-based brazing material comprising an alloy consisting essentially of: (i) 15 to 30 wt % chromium (Cr); (ii) 0.1 to 4.5 wt % manganese (Mn); (iii) 15 to 30 wt % nickel (Ni); (iv) 1.0 to 12 wt % molybdenum (Mo); (v) 0.1 to 4.0 wt % copper (Cu); (vi) 0 to 1.0 wt % nitrogen (N); (vii) 8.0 to 12.0 wt % silicon (Si); the alloy being balanced with iron (Fe); and wherein the alloy further contains boron within the range from 0.1 to about 1.0 wt %, or the alloy further contains phosphorous within the range of from 5.0 to about 14 wt %, or the alloy further contains combinations of B within said range and P within said range; and wherein Si, B, and P are in amounts effective to lower melting temperature of a brazing material formed by the alloy, and Si, B, and P are contained in amounts according to the following formula: Index=wt % P+1.1×wt % Si+3×wt % B, and the value of the Index is within the range of from 9.1 wt % to about 20 wt %; and wherein the alloy optionally contains one or more of elements selected from the group consisting of carbon (C), vanadium (V), titanium (Ti), tungsten (W), aluminum (Al), niobium (Nb), hafnium (Hf), and tantalum (Ta), wherein the amount of each element is within the range from 0.0 to 2.5 wt %, the alloy being balanced with Fe and small inevitable amounts of contaminating elements.