公开(公告)号：US20210069828A1

公开(公告)日：2021-03-11

申请号：US17087958

申请日：2020-11-03

Applicant: DENSO CORPORATION

Inventor： Noritsugu KATO ,  Shigeyuki KUSANO ,  Yuki KATO ,  Tsuyoshi HAYAKAWA

IPC: B23K26/28 ,  B23K26/067 ,  B23K26/06 ,  B23K26/082

Abstract: An adjustment of the amount of energy in at least one specific applying unit is executed when energy is applied to a cylindrical member pair in which another cylindrical member is inserted inside a cylindrical member to melt and weld the cylindrical member pair in a circumferential direction. The adjustment is executed in association with a rotation angle to satisfy a relationship of Pd+Pw>θ, wherein Pd is an output decease rotation angle that decreases the energy amount from a steady energy amount HP applied from the specific applying unit in a welding end process, Pw is an overlap rotation angle at which the irradiation parts around the cylindrical member pair overlap with the steady energy amount HP, and θ is a separation angle between the specific applying unit and another applying unit adjacent to each other in a rotation direction around the axis.

公开(公告)号：US20210047715A1

公开(公告)日：2021-02-18

申请号：US17083391

申请日：2020-10-29

Applicant: DENSO CORPORATION

Inventor： Mirai SAKAMOTO ,  Yoshihiro TANIMURA ,  Shigeyuki KUSANO ,  Noritsugu KATO ,  Yuki KATO

IPC: C22C38/44 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/46

Abstract: A martensitic stainless steel contains 0.20 mass %≤C≤0.60 mass %, 0.10 mass %≤N≤0.50 mass %, 14.00 mass %≤Cr≤17.00 mass %, 1.00 mass %≤Mo≤3.00 mass %, 0.20 mass %≤V≤0.40 mass %, Si≤0.30 mass %, Mn≤0.80 mass %, P≤0.040 mass %, S≤0.040 mass %, Cu≤0.25 mass %, Ni≤0.20 mass %, and the balance Fe with inevitable impurities.