公开(公告)号：US20230219115A1

公开(公告)日：2023-07-13

申请号：US18077162

申请日：2022-12-07

Applicant: NTN CORPORATION

Inventor： Takafumi IWAMOTO ,  Kazuhiko YOSHIDA ,  Masato CHOKYU ,  Shintaro SUZUKI ,  Hiromi HAYASHI

IPC: B05D3/02 ,  F16D3/20 ,  B05D1/06 ,  B05D7/14 ,  C21D1/42 ,  B05D1/04 ,  C21D9/00 ,  C21D1/18

CPC classification number: B05D3/0254 ,  B05D3/0281 ,  F16D3/20 ,  B05D1/06 ,  B05D7/14 ,  C21D1/42 ,  B05D1/04 ,  Y10T428/31678 ,  C21D9/0068 ,  Y10T428/269 ,  B60B2310/616 ,  B05D2401/32 ,  C21D1/18 ,  Y10T428/294 ,  B60B2900/141 ,  C21D2261/00 ,  B60B2310/208 ,  B60B2310/54 ,  B05D2601/20 ,  Y10T428/31529

Abstract: coating film having excellent adhesion, even without the presence of a chemical conversion film treatment out as an undercoat and a metal automotive part having the coating film.
A powder is deposited by powder-coating onto the surface of a metal automotive part that has been quenched after simultaneously forging, and tempering the metal automotive part and bake-hardening the deposited powder to form a skin film on the surface of the metal automotive part. The surface of the metal automotive part before the powder is powder-coated thereon is a work-hardened material surface that has been not been subjected to a chemical conversion filming treatment.

公开(公告)号：US20190217334A1

公开(公告)日：2019-07-18

申请号：US16359910

申请日：2019-03-20

Applicant: NTN CORPORATION

Inventor： Takafumi IWAMOTO ,  Kazuhiko YOSHIDA ,  Masato CHOKYU ,  Shintaro SUZUKI ,  Hiromi HAYASHI

IPC: B05D3/02 ,  F16D3/20 ,  B05D1/04 ,  B60B27/00 ,  B05D7/14 ,  B60B35/14

CPC classification number: B05D3/0254 ,  B05D1/04 ,  B05D3/0281 ,  B05D7/14 ,  B05D2601/20 ,  B60B27/0036 ,  B60B35/14 ,  B60B2310/208 ,  B60B2310/54 ,  B60B2310/616 ,  B60B2900/141 ,  C21D1/18 ,  C21D9/0068 ,  C21D2261/00 ,  F16D3/20 ,  Y10T428/269 ,  Y10T428/294 ,  Y10T428/31529 ,  Y10T428/31678

Abstract: The invention provides a coating film having excellent adhesion, even without a chemical conversion film treatment being carried out as an undercoat treatment, and a metal automotive part having the coating film. A powder is deposited by powder-coating onto the surface of a metal automotive part that has been quenched after forging, and tempering of the metal automotive part and bake-hardening of the deposited powder are carried out simultaneously, thereby forming a skin film on the surface of the metal automotive part. The surface of the metal automotive part before the powder is powder-coated thereon is a work-hardened basis material surface that has been not subjected to a chemical conversion filming treatment.