Device and method for continuously performing grain boundary diffusion and heat treatment

A device for continuously performing grain boundary diffusion and heat treatment, wherein:

• an alloy workpiece or a metal workpiece is disposed in a relatively independent processing box together with a diffusion source;
• the device comprises:
• a grain boundary diffusion chamber,
• a first cooling chamber,
• a heat treatment chamber,
• a second cooling chamber, wherein the grain boundary diffusion chamber, the first cooling chamber, the heat treatment chamber, and the second cooling chamber are disposed in sequence by means of airtight devices, and
• a transfer system disposed among the grain boundary diffusion chamber, first cooling chamber, the heat treatment chamber, and the second cooling chamber to transfer the relatively independent processing box;
• both the first cooling chamber and the second cooling chamber adopt an air cooling system;
• a cooling air temperature of the first cooling chamber is 25° C. or above and differs from a grain boundary diffusion temperature of the grain boundary diffusion chamber by at least 550° C.;
• a cooling air temperature of the second cooling chamber is 25° C. or above and differs from a heat treatment temperature of the heat treatment chamber by at least 300° C.;
• a pressure of the first cooling chamber and a pressure of the second cooling chamber are 50 kPa-100 kPa;
• the grain boundary diffusion chamber is presented as a square structure and comprises two heating regions disposed facing each other on an inner wall of the square structure of the grain boundary diffusion chamber;
• the relatively independent processing box is placed on a first material rack at a center of the square structure of the grain boundary diffusion chamber for the grain boundary diffusion treatment;
• the heat treatment chamber is presented as a square structure and comprises two heating regions disposed facing each other on an inner wall of the square structure of the heat treatment chamber;
• and
• the relatively independent processing box is placed on a second material rack at a center of the square structure of the heat treatment chamber for the heat treatment.