# US 11,306,376 B2 · Wastegate component comprising a novel alloy > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,376 B2 - Document ID: US11306376B2 - Status: Granted - Kind: B2 - Application number: 16/063,369 - Filed: 2016-12-07 - Published: 2019-01-03 - Granted: 2022-04-19 - Earliest claimed: 2015-12-18 - Assignees: BorgWarner Inc. - Applicants: BorgWarner Inc. - Inventors: Gerald Schall; Melanie Gabel; Stephan Weniger - Web page: https://patentgrep.com/patent/US11306376B2 ## CPC - C22C 30/00: Alloys containing less than 50% by weight of each constituent - C21D 9/0068: {for particular articles not mentioned below} - C22C 19/05: with chromium - C22C 19/055: {with the maximum Cr content being at least 20% but less than 30%} - C22C 19/056: {with the maximum Cr content being at least 10% but less than 20%} - F02B 37/183: {Arrangements of bypass valves or actuators therefor} - Y02T 10/12: Improving ICE efficiencies - C22C: ALLOYS (treatment of alloys C21D, C22F) - C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The present invention relates to a waste gate component for a turbo charger comprising an alloy comprising about 30 to about 42 wt.-% Ni, about 15 to about 28 wt.-% Cr, about 1 to about 5 wt.-% Cr, about 1 to about 4 wt.-% Ti, and at least about 20 wt.-% Fe, and to processes for preparing such a waste gate component. ## Claims ### Claim 1 A waste gate component for a turbo charger comprising an alloy of the following composition: a) Ni 30 to 42 wt.-%, b) Cr 15 to 28 wt.-%, c) Co 1 to 5 wt.-%, d) Ti 1 to 4 wt.-%, Fe as balance, but at least in an amount of 20 wt.-%; and wherein the alloy extends to a surface of the component and has an austenitic microstructure and comprises second phase particles or aggregates of said second phase particles, wherein said particles have an average grain size of less than 5 μm, wherein at least part of the surface of the component is preparable by shot peening the surface with a substantially spherical shot material having a diameter of between 100 and 200 μm. ### Claim 2 (depends on 1) The waste gate component according to claim 1, wherein the alloy comprises at least one of Nb in an amount of 1 to 4 wt.-%, Win an amount of 0.1 to 3 wt.-%, Mo in an amount of 0.5 to 4 and C in the alloy is less than 0.1 wt.-%. ### Claim 3 (depends on 1) The waste gate component according to claim 1, wherein the alloy comprises between 1 and 10 wt.-% of at least one of Mn, Al, or Si. ### Claim 4 (depends on 3) The waste gate component according to claim 3, wherein the alloy comprises 0.5-4 wt.-% Mo, 0.1 to 2 wt.-% Al, and 0.1 to 3 wt.-% W. ### Claim 5 (depends on 1) The waste gate component according to claim 1, wherein the alloy comprises 0.5-4 wt.-% Mo, 0.1 to 2 wt.-% Al, 0.1 to 3 wt.-% Mn, 0.1 to 3 wt.-% W, 0.5 to 4 wt.-% Si, and 1 to 4 wt.-% Nb. ### Claim 6 (depends on 1) The waste gate component according to claim 1, wherein the alloy comprises a) Ni 34 to 38 wt.-%, b) Cr 19 to 24 wt.-%, c) Co 1.5 to 4.5 wt.-%, d) Ti 2.0 to 3.0 wt.-%. ### Claim 7 (depends on 1) The waste gate component according to claim 1, wherein the alloy comprises 1.0 to 3.0 wt.-% Mo, 0.3 to 0.8 wt. -% Al, 0.5 to 2.5 wt. -% Mn, 0.5 to 2.5 wt. -% W, 0.6 to 2.4 wt.-% Si, and 1.7 to 2.5 wt.-% Nb. ### Claim 8 (depends on 1) The waste gate component according to claim 1, wherein the alloy comprises less than 0.1 wt.-% C, less than 0.05 wt.-% P, less than 0.05 wt.-% S, and less than 300 ppm, by weight, of N. ### Claim 9 (depends on 1) The waste gate component according to claim 1, wherein the alloy has been subjected to solution heat treatment, precipitation hardening, or both. ### Claim 10 (depends on 1) The waste gate component according to claim 1, wherein at least a part of the surface of the component has a plurality of indentations. ### Claim 11 (depends on 1) The waste gate component according to claim 1, wherein the component is a flap plate or a spindle.