CPC B23K 35/3606 (2013.01) [B23K 1/20 (2013.01); B23K 35/025 (2013.01); B23K 35/3086 (2013.01); B23K 2103/05 (2018.08)] | 20 Claims |
1. A method for joining a first metal part with a second metal part, the metal parts having a solidus temperature above 1100° C., the method comprising:
applying a melting depressant composition at least on a surface of the first metal part, the melting depressant composition comprising:
a melting depressant component comprising at least 25 wt % boron and silicon in total for decreasing a melting temperature of the first metal part; and
optionally, a binder component for facilitating the applying of the melting depressant composition on the surface;
bringing the second metal part into contact with the melting depressant composition at a contact point on said surface;
heating the first and second metal parts to a temperature above 1100° C., said surface of the first metal part thereby melting such that a surface layer of the first metal part melts and, together with the melting depressant component, forms a molten metal layer that is in contact with the second metal part at the contact point; and
allowing the molten metal layer to solidify, such that a joint is obtained at the contact point,
wherein a source of the boron comprises a boron compound selected from any of the following compounds: titanium diboride, boron nitride and/or combinations thereof.
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