公开(公告)号：US11738414B2

公开(公告)日：2023-08-29

申请号：US17606566

申请日：2020-05-08

Applicant: Alfa Laval Corporate AB

Inventor： Per Sjödin ,  Kristian Walter ,  Axel Knutsson

IPC: B23K1/00 ,  B23K35/36 ,  B23K1/20 ,  B23K35/02 ,  B23K35/30 ,  B23K103/04

CPC classification number: B23K35/3606 ,  B23K1/20 ,  B23K35/025 ,  B23K35/3086 ,  B23K2103/05

Abstract: A method for joining a first metal part with a second metal part, the metal parts having a solidus temperature above 1100° C., includes applying a melting depressant composition on a surface of the first metal part, the melting depressant composition including a melting depressant component that includes at least 25 wt % boron and silicon for decreasing a melting temperature of the first metal part; 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.; and allowing a melted metal layer of the first metal component to solidify, such that a joint is obtained at the contact point. The boron at least partly originates from a boron compound selected from any of the following compounds: boric acid, borax, titanium diboride and boron nitride. The melting depressant composition and related products are also described.