How do manufacturers of cylinder forgings prevent the fracture of forgings?
Time:
Nov 13,2023
The mechanical properties of a metal depend on its organizational state.Large steel ingots with more internal defects obtain a dense forging structure through forging, which is the basis for large forgings to achieve good comprehensive performance after heat treatment.
The mechanical properties of a metal depend on its organizational state.Large steel ingots with more internal defects obtain a dense forging structure through forging, which is the basis for large forgings to achieve good comprehensive performance after heat treatment.
The main process of the forging process to turn the cast tissue into a forged tissue is as follows: crushing the thick primary dendritic grains to refine them; densifying the tissue by pores, shrinkage, and loose forging; dispersing and homogenizing uneven tissues such as segregation and inclusions.These points are the main roles of the so-called mechanical metallurgy of the forging process.
There are many forms of fracture in forging plants when processing forgings, and the following measures can be used to prevent fracture.Ensure the quality of the forgings, and there shall be no surface defects such as pits, pitting, trachoma, etc. on the surface of the forgings before installation.At the same time, the grinding quality of forgings should be improved. Grinding is an effective measure to eliminate cracks in forgings and prevent fractures and flaking of forgings. The cracks in forgings after disembarking the machine should be detected and recorded, and the amount of grinding should be increased. The compressive stress cracks must be completely eliminated.In order to effectively grind the cracks, magnetic particle flaw detection and ultrasonic flaw detection should be carried out in conjunction.
Make sure that the forgings are well cooled.In production, it is necessary to strengthen the management of the cooling nozzle of the forgings to ensure that the cooling water pressure of the forgings is normal, the filter and the cooling nozzle are not clogged, the nozzle angle is normal, and the water volume is sufficient to control the temperature of the forgings within a certain range to ensure the normal use of the forgings.Reduce the temperature gradient of the forgings and reduce the thermal stress of the forgings.
Implement standardized operations and improve the level of process operation.Using a strict process system, the rhythm of forgings can be controlled, the heating temperature of the steel material can be uniform, and the yin and yang surfaces can be eliminated.At the same time, the amount of pressure should be rationally allocated so that the steel material can be exported straight from the hole shape, and the guard plate should be firmly installed to prevent winding.
It is also necessary to operate carefully to prevent the steel material from feeding the wrong holes, and to eliminate low-temperature steel and blackhead steel, so as not to cause increased pressure, fatigue of the forgings, and even cause fracture.
Key words:
Finishing of aluminum forgings
2023-07-25
Application of aluminum alloy forgings in electric power industry
2023-07-25
How to distinguish between stainless steel screws, galvanized and nickel-plated screws?
2023-11-13