公开(公告)号：US20180230625A1

公开(公告)日：2018-08-16

申请号：US15952636

申请日：2018-04-13

Applicant: NV BEKAERT SA

Inventor： Guy BUYTAERT ,  Dieter WEMEL ,  Patricia REIS

IPC: D02G3/48 ,  C22C38/00 ,  B32B15/01 ,  C25D5/48 ,  C25D5/10 ,  C22C9/04 ,  D02G3/12 ,  C25D5/50 ,  C22C38/04 ,  C08K3/04 ,  C08J5/04 ,  B21C1/02 ,  C22C38/42 ,  C22C38/44 ,  B60C9/00 ,  C08K3/08 ,  D07B1/06 ,  C22C38/02 ,  C25D3/22 ,  C25D3/12 ,  C25D3/38

CPC classification number: D02G3/48 ,  B21C1/02 ,  B32B15/015 ,  B60C9/0007 ,  B60C2009/0014 ,  C08K3/08 ,  C09D5/38 ,  C09D7/61 ,  C22C9/04 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C25D3/12 ,  C25D3/22 ,  C25D3/38 ,  C25D5/10 ,  C25D5/48 ,  C25D5/50 ,  D07B1/066 ,  D07B1/0666 ,  D07B2201/2011 ,  D07B2201/2043 ,  D07B2205/3089 ,  D07B2501/2046 ,  D07B2801/18

Abstract: A process for manufacturing an elongated steel element for reinforcing rubber products includes forming, on an elongated steel element, a coating of a ternary or quaternary alloy of copper-M-zinc, where M is one or two metals selected from cobalt, nickel, tin, indium, manganese, iron, bismuth and molybdenum; drawing the elongated steel element in an aqueous lubricant containing a phosphorus compound and nitrate; and twisting two or more of the elongated steel elements into a steel cord. A copper content inside the coating is 58 to 75 wt %. A content of the one or two metals inside the coating is 0.5 to 10 wt %. A final reduction in a diameter of the elongated steel element occurs during the drawing step. The phosphorus compound is present on and/or in the coating in an amount of 0.3 to 1 mg/m2 of the coating, as measured via an Inductively Coupled Plasma technique.