Title:
METHOD FOR PRODUCING SPRUE SPREADER AND METHOD FOR PRODUCING LAMINATING DIE
Document Type and Number:
Japanese Patent JP2020069481
Kind Code:
A
Abstract:
To obtain a diffusion joining method free from the generation of defects.SOLUTION: Treatments including: a step where a steel (St) and copper or a copper alloy (Cu) before joining are arranged in a pressurization-heating furnace for performing diffusion joining in a combined state, and the temperature in the furnace is stabilized at 600±5°C for about 30 min; a step where the temperature in the furnace is increased for about 14 min at 750±5°C; a step where the pressurization of the inside of the furnace in a state having a stabilized temperature at 750±5°C is started, and the pressurization is gradually performed so that the pressurization force in the furnace reaches 20±0.1 MPa after about 30 min; a step where continuance is performed for about 2 hr in a state where the pressurization force in the furnace reaches 20±0.1 MPa; and a step where, after the passage of about 2 hr, the power source of the temperature in the furnace is made OFF to naturally decrease the temperature, and further, regarding the pressurization force in the furnace, the pressure in the furnace is gradually decreased for about 15 min to make the pressurization force zero are practiced, and also, when the respective treatment are practiced, the degree of vacuum in the furnace is kept to 0.5±0.1 Pa.SELECTED DRAWING: Figure 4
Inventors:
OMOTO TAKESHI
KITAMURA MITSUAKI
KITAMURA MITSUAKI
Application Number:
JP2018202785A
Publication Date:
May 07, 2020
Filing Date:
October 29, 2018
Export Citation:
Assignee:
RYOBI LTD
International Classes:
B22D17/22; B22C9/06; B23K20/00
Attorney, Agent or Firm:
Hiroaki Kaita