Process_Wenzhou Yanzhi Valve Manufacturing Co., Ltd.

01

Process design

? Designing forging part drawings
? Calculating blank dimensions
? Determining deformation steps
? Confirming mold manufacturing

02

Raw material procurement

? Planning the purchase of round steel
? Conducting sampling and quality inspections
? Performing surface treatments as required
Peeling, polishing, etc.

03

Blank cutting

? Calculating consumption data
? Performing cutting operations
Shelving, circular sawing, band sawing, and shearing, etc.
? Classifying and marking the blanks

04

Blank heating

? Using electric furnaces to control the temperature
Continuous furnaces, and chamber furnaces, etc.
? Controlling the furnace temperature according to the material
? Monitoring the uniform temperature inside and outside the blanks
? Using infrared thermometers

05

Forging forming

Determining process combinations based on the shape
? Rough forging process：
Upsetting, elongation, extrusion, etc.
? Forging process：
Pre-forging, precision forging, trimming, and shaping, etc.

06

Heat treatment

Conducting different forms of heat treatment according to the material properties
? Annealing
? Normalizing
? Quenching
? Tempering
? Etc.

07

Surface cleaning

? Shot blasting
? Acid cleaning
? Manual polishing
? Etc.

08

Quality inspection

? Chemical composition inspection
? Dimension and appearance inspection
? Mechanical performance testing
? Non-destructive testing
? Metallographic analysis
? Intergranular corrosion testing