High-temperature alloy dual-performance disc rolling forming process
A high-temperature alloy, forming technology, applied in the direction of spoke wheel, wheel, transportation and packaging, etc., can solve the problems of voids, difficult to maintain a stable low temperature in the core, grain growth and so on
Inactive Publication Date: 2014-02-19
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
View PDF8 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Another method is to use fine-grained powder blanks, only forging the center and the transition zone, and the outer edge is only induction heated without forging, resulting in grain growth; the disadvantage is that the outer edge is not forged and has void defects, and it is difficult to keep the core stable low temperature
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0013] The dual-performance disk to be formed has a diameter of 200mm and a maximum thickness of 20mm. There is a groove with a depth of 5mm and a width of 30mm inside the disk, and the inner diameter of the groove is 100m. The plate material is GH4169 high temperature alloy. The requirements for the grain size of the dual-performance disk are: the grain size of the rim part is 5-6, the grain size of the hub (center) part is 8-12, and the grain size transition between the rim and the hub is smooth. The specific working steps of forming the dual-performance disk are as follows.
[0014] 1) Billet making: use the standard state bar, through free forging to obtain a blank with an average grain size of 60-100μm, the volume of the blank is equal to that of the piece, and the diameter of the blank is 180mm.
[0015] 2) According to the grain size distribution, the edge temperature of the plate is designed to be 1020°C-1100°C, and the center temperature is 950°C-1000°C. Based on thi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a high-temperature alloy dual-performance disc rolling forming process. The process is mainly characterized in that turbine disc rolling forming is carried out at a high temperature through the double-face rolling forming technology and the induction heating method, and the shape of a disc part and dual-performance grain size distribution can be formed at a time. A high-temperature alloy disc blank used in the process can be a powder disc blank formed after hot isostatic pressure as well as a cast ingot disc blank formed through casting, and it is required that the grain of the disc blank is not too large, the powder disc blank is free of the looseness defect and particles are well welded together. Compared with an existing commonly-used isothermal forging and dual-structure heat treatment process, the method for manufacturing a high-temperature alloy dual-performance turbine disc has the technical advantages that the geometrical shape and the dual-structure dual performance of the disc part are formed at the same time, the dual-structure heating treatment process is eliminated, the process flow is short, numerical control operation is adopted, the process is stable, dieless forming is achieved, load is low, cost is low, and the process can be easily applied to industry.
Description
technical field [0001] The invention relates to a rolling forming process of a superalloy dual-performance turbine disc. Background technique [0002] In the prior art, whether it is an ingot billet or a powder disc billet, the integral die forging process is generally used to form the turbine disc at home and abroad. The overall die forging process includes ordinary die forging, differential temperature forging and isothermal forging. Isothermal forging can improve the uniformity of the microstructure and performance of the disc, but the mold cost is very high. Dual-performance disks are divided into double-alloy dual-performance disks and single-alloy dual-performance disks. The dual-alloy dual-performance disc is made of a durable, creep-resistant coarse-grained alloy for the rim, and a high-strength fine-grained alloy for the hub, and the two parts are connected by welding, hot isostatic pressing or superplastic forging. A dual-alloy dual-performance disc is made. T...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B21H1/02
Inventor 金泉林
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH