公开(公告)号：US10662892B2

公开(公告)日：2020-05-26

申请号：US15261856

申请日：2016-09-09

Applicant: Caterpillar Inc.

Inventor： Michael Pollard ,  Indrajith Kizhakkethara ,  Hugh McLean

IPC: F02F3/00 ,  B23K20/12 ,  B23K20/227 ,  C22C38/40 ,  F02F3/22 ,  F02F3/26 ,  B23K101/00 ,  B23K103/04

Abstract: A piston for an internal combustion engine includes a compound piston body having a crown piece joined to a skirt piece by a circumferential weld. The skirt piece is formed of a lower temperature-capable steel such as a low alloy steel, and the crown piece is formed of a higher temperature-capable steel having a martensitic microstructure and containing about 10% wt. or greater of chromium. Related methodology for making a piston is also disclosed.

公开(公告)号：US20180073462A1

公开(公告)日：2018-03-15

申请号：US15261856

申请日：2016-09-09

Applicant: Caterpillar Inc.

Inventor： Michael Pollard ,  Indrajith Kizhakkethara ,  Hugh McLean

IPC: F02F3/00 ,  F02F3/26 ,  F02F3/22 ,  B23K20/12 ,  B23K20/227 ,  C22C38/40

CPC classification number: F02F3/003 ,  B23K20/129 ,  B23K20/227 ,  B23K2101/003 ,  B23K2103/04 ,  B23K2103/05 ,  C21D2211/008 ,  C22C38/40 ,  F02F3/0084 ,  F02F3/22 ,  F02F3/26 ,  F02F2003/0061

Abstract: A piston for an internal combustion engine includes a compound piston body having a crown piece joined to a skirt piece by a circumferential weld. The skirt piece is formed of a lower temperature-capable steel such as a low alloy steel, and the crown piece is formed of a higher temperature-capable steel having a martensitic microstructure and containing about 10% wt. or greater of chromium. Related methodology for making a piston is also disclosed.