How to choose the corresponding forging process for metal forging based on the forging

1. What are the characteristics of hot forging, warm forging, and cold forging, and what forgings are they suitable for? Hot forging: refers to the processing of billets above the recrystallization temperature of the metal. Features: 1) Reduce the deformation resistance of metals, thereby reducing the forging pressure required for deformation of defective materials, greatly reducing the tonnage of forging equipment; 2) Change the as cast structure of the steel ingot, undergo recrystallization during the hot forging process, and the coarse as cast structure becomes a new structure with fine grains, reducing defects in the as cast structure and improving the mechanical properties of the steel; 3) Improving the plasticity of steel is particularly important for some high alloy steels that are brittle and difficult to forge at low temperatures.

Suitable for a class of metal materials with high deformation resistance and poor plasticity at room temperature.

Warm forging: a forging process carried out within the range of recrystallization temperature. Features: The purpose of using warm forging technology is to obtain precision forgings, and the advantage of warm forging is that it can improve the accuracy and quality of forgings, while not having the same large forming force as cold forging. Suitable for precision die forgings of small and medium-sized carbon steel with complex shapes.

Cold forging: refers to the processing of billets at temperatures above the recrystallization temperature of the metal. Features: Cold forged parts have good surface quality, high dimensional accuracy, and can replace some cutting processes. Cold forging can strengthen metals and improve the strength of parts. Suitable for aluminum and some alloys, copper and some alloys, low carbon steel, medium carbon steel, and low alloy structural steel with low deformation resistance and good plasticity at room temperature.

What are the characteristics of several forging methods on screw presses?

Z can only perform die forging, characterized by 1) having the dual characteristics of a forging hammer and a crank press; 2) Less trips per minute, low hitting speed; 3) Friction press has the lowest transmission efficiency among screw presses.

What are the forging characteristics of aluminum, magnesium, titanium, and copper alloys, and what types of materials and parts are they suitable for.

Aluminum alloy forging characteristics: aluminum alloy forging temperature is low, forging temperature is narrow, the surface of the tool in contact with aluminum alloy must be smooth, the action during aluminum alloy forging must be rapid, and the forging process must be carried out in static air; Cracks or folds generated during the forging process should be removed in a timely manner, as punching aluminum alloy forgings is relatively difficult. Magnesium alloy is a lightweight metal structural material with high specific strength and stiffness, good damping, electromagnetic shielding, dimensional stability, ease of processing, and recyclability.

In recent years, the application of magnesium alloys in fields such as automobiles, communications, 3C products, transportation, household appliances, and new energy has grown rapidly. Characteristics of copper alloy forging: The temperature range of copper alloy forging is narrow (about 150-200 ℃). Copper alloy has appropriate strength, toughness, and plasticity, especially its corrosion resistance in air and seawater, and is good at conducting heat and electricity. Therefore, a considerable proportion of marine parts need to be made of copper alloy.

At present, copper alloys are widely used to forge high-strength, high-temperature, high-pressure, and corrosion-resistant shafts, flanges, and valve bodies for various types of ships. Characteristics of titanium alloy forging: Titanium alloy has high deformation resistance, narrow forging temperature, and high sensitivity to defects. Used in applications such as gas turbine compressor discs and medical artificial bones that require high strength, toughness, and reliability.