# US 10,319,488 B2 · Conductor for a power transmission cable and a process for the production of the conductor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,319,488 B2 - Document ID: US10319488B2 - Status: Granted - Kind: B2 - Application number: 15/753,729 - Filed: 2015-08-19 - Published: 2018-08-30 - Granted: 2019-06-11 - Earliest claimed: 2015-08-19 - Assignees: NKT HV Cables AB - Applicants: NKT HV Cables GmbH - Inventors: Johan Hedlund; Igor Lacic - Web page: https://patentgrep.com/patent/US10319488B2 ## CPC - H01B 1/023: {Alloys based on aluminium} - B23K 35/288: {with Sn or Zn} - C22C 21/00: Alloys based on aluminium - C22C 21/02: with silicon as the next major constituent - H01B 9/006: {Constructional features relating to the conductors} - H01B 13/0036: {Details} - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM - C22C: ALLOYS (treatment of alloys C21D, C22F) ## Abstract A conductor for a power transmission cable including at least two separate lengths of conductors, having at least 99.5% by weight aluminum, and the remainder other metals or substances except a titanium content of at most 0.02% by weight. The at least two lengths of aluminum conductors joined together by a weld. The welding material alloy has an aluminum content of at least 85.2% by weight, a silicon content of from 4.0 to 13.0% by weight and the remainder up to 100% by weight and at most 1.8% by weight, other metals and/or substances; or an aluminum content of at least 99.5% by weight, a titanium content of from 0.10 to 0.50% by weight and the remainder up to 100% by weight, other metals and/or substances. ## Claims ### Claim 1 A conductor for a power transmission cable comprising: at least two separate lengths of aluminium conductors, wherein the aluminium content of the lengths of the aluminium conductors is at least 99.5% by weight, and the remainder up to 100% by weight includes other metals and/or substances, and wherein a titanium content in the remainder is at most 0.02% by weight, based on the total weight of the lengths of the aluminum conductors, the at least two lengths of the aluminium conductors being joined together by means of a metal inert gas welded or tungsten inert gas welded joint including a welding material alloy, wherein the welding material alloy has an aluminium content of at least 85.2% by weight, a silicon content of from 11.0 to 13.0% by weight and the remainder up to 100% by weight and at most 1.8% by weight, based on the total weight of the welding material alloy, includes other metals and/or substances. ### Claim 2 (depends on 1) The conductor according to claim 1, wherein the welding material alloy has an aluminium content of at least 92.3% by weight, and a silicon content of from 4.5 to 6.0% by weight and the remainder up to 100% by weight and at most 1.7% by weight, based on the total weight of the welding material alloy, includes other metals and/or substances. ### Claim 3 (depends on 1) The conductor according to claim 1, wherein the lengths of the aluminium conductors have an aluminium content of at least 99.7% by weight and the remainder up to 100% by weight includes other metals and/or substances. ### Claim 4 (depends on 1) The conductor according to claim 1, wherein the other metals or substances in the welding material alloy include one or more of Si, Mn, V, Cu, Ti, Zn, Fe, Be and Mg. ### Claim 5 (depends on 1) The conductor according to claim 1, wherein the other metals or substances in the lengths of the aluminum conductors include one or more of B, Cr, Cu, Fe, Ga, Mn, Si, V,Ti, Zn. ### Claim 6 (depends on 1) The conductor according to claim 1, wherein the welded joint is a v-joint. ### Claim 7 (depends on 1) The conductor according to claim 1, wherein the lengths of the aluminum conductors have a structure of a stranded conductor, a solid conductor, a profile wire conductor or a combination thereof. ### Claim 8 (depends on 1) A power transmission cable including the conductor according to claim 1. ### Claim 9 (depends on 8) The power transmission cable according to claim 8, further including an insulation system that covers the conductor coaxially and radially outwards. ### Claim 10 (depends on 1) A process for the production of a conductor for a power transmission cable according to claim 1 including the steps of: a. providing at least two separate lengths of aluminium conductors for a power transmission cable, wherein the aluminium content of the lengths of the aluminium conductors is at least 99.5% by weight, and the remainder up to 100% by weight includes other metals and/or substances, and wherein a titanium content in the remainder is at most 0.02% by weight, based on the total weight of the lengths of the aluminum conductors; and b. joining the lengths of the aluminum conductors together by means of welding, wherein the welding is performed by using a welding material alloy having an aluminium content of at least 85.2% by weight, a silicon content of from 11.0 to 13.0% by weight and the remainder up to 100% by weight and at most 1.8% by weight, based on the total weight of the welding material alloy, includes other metals and/or substances; wherein the welding is metal inert gas welding or tungsten inert gas welding. ### Claim 11 (depends on 10) The process according to claim 10, wherein the welding joint obtained is a v-joint. ### Claim 12 (depends on 10) The process according to claim 10 including a further step of applying an insulation system to cover the conductor radially outwards. ### Claim 13 A conductor for a power transmission cable comprising: at least two separate lengths of aluminium conductors, wherein the aluminium content of the lengths of the aluminium conductors is at least 99.5% by weight, and the remainder up to 100% by weight includes other metals and/or substances, and wherein a titanium content in the remainder is at most 0.02% by weight, based on the total weight of the lengths of the aluminum conductors, the at least two lengths of the aluminium conductors being joined together by means of a welded joint including a welding material alloy, wherein the welding material alloy has an aluminium content of at least 99.5% by weight, a titanium content of from 0.10 to 0.50% by weight and the remainder up to 100% by weight, based on the total weight of the welding material alloy, includes other metals and/or substances. ### Claim 14 (depends on 13) The conductor according to claim 13, wherein the welding material alloy has an aluminium content of at least 99.5% by weight, a titanium content of from 0.10 to 0.20% by weight and the remainder up to 100% by weight includes other metals and/or substances. ### Claim 15 (depends on 13) The conductor according to claim 13, wherein the lengths of the aluminium conductors have an aluminium content of at least 99.7% by weight and the remainder up to 100% by weight includes other metals and/or substances. ### Claim 16 (depends on 13) The conductor according to claim 13, wherein the other metals or substances in the welding material alloy include one or more of Si, Mn, V, Cu, Ti, Zn, Fe, Be and Mg. ### Claim 17 (depends on 13) The conductor according to claim 13, wherein the other metals or substances in the lengths of the aluminum conductors include one or more of B, Cr, Cu, Fe, Ga, Mn, Si, V,Ti, Zn. ### Claim 18 (depends on 13) The conductor according to claim 13, wherein the welded joint is a v-joint. ### Claim 19 (depends on 13) The conductor according to claim 13, wherein the lengths of the aluminum conductors have a structure of a stranded conductor, a solid conductor, a profile wire conductor or a combination thereof. ### Claim 20 (depends on 13) A power transmission cable including the conductor according to claim 13. ### Claim 21 (depends on 20) The power transmission cable according to claim 20, further including an insulation system that covers the conductor coaxially and radially outwards. ### Claim 22 A process for the production of a conductor for a power transmission cable including the steps of: a. providing at least two separate lengths of aluminium conductors for a power transmission cable, wherein the aluminium content of the lengths of the aluminium conductors is at least 99.5% by weight and the remainder up to 100% by weight includes other metals and/or substances and wherein a titanium content in the remainder is at most 0.02% by weight, based on the total weight of the lengths of the aluminum conductors; b. joining the lengths of the aluminum conductors together by means of welding, wherein welding is performed by using a welding material alloy having an aluminium content of at least 99.5% by weight, a titanium content of from 0.10 to 0.50% by weight and the remainder up to 100% by weight, based on the total weight of the welding material alloy, includes other metals and/or substances. ### Claim 23 (depends on 22) The process according to claim 22, wherein the welding joint obtained is a v-joint. ### Claim 24 (depends on 22) The process according to claim 22, wherein the welding method is metal inert gas welding or tungsten inert gas welding. ### Claim 25 (depends on 22) The process according to claim 22 including a further step of applying an insulation system to cover the conductor radially outwards.