Water-based lubricating agent for hot extrusion as well as preparation method and use method thereof

Abstract

The invention discloses a water-based lubricating agent for hot extrusion as well as a preparation method and a use method thereof. The water-based lubricating agent is composed of the following components by weight percent: 5%-10% of graphite, 2.5%-20% of MoS2 and the balance water, wherein, the mass ratio of the graphite to the MoS2 in the water-based lubricating agent is 4:1-10. The preparation method comprises the following steps: diluting forging graphite milk with water; and adding MoS2 micropowder to the diluted forging graphite milk and dispersing evenly to obtain the water-based lubricating agent. In the use method, the water-based lubricating agent is uniformly sprayed on the surface of an extrusion tool and die; and after the moisture in the water-based lubricating agent is evaporated, solid components in the lubricating agent form a layer of compact and continuous mixed solid lubricant film with the thickness of 100mu m-500mu m on the surface of the extrusion tool and die. In the invention, the technological process is simple, feasible and controllable; and the water-based lubricating agent for the hot extrusion can fully replace the existing oil-based lubricating agent so as to eliminate lampblack pollution, thus achieving obvious economic benefit and obvious environmental benefit.

Description

technical field [0001] The invention belongs to the technical field of lubricants, and in particular relates to a water-based lubricant for hot extrusion and a preparation and use method thereof. Background technique [0002] Titanium, zirconium and their alloys have a variety of excellent mechanical properties and corrosion resistance, and their various specifications of pipes are widely used in the fields of aerospace, nuclear power, ships, chemicals and seawater desalination. At present, the methods for preparing the tube blank include: hot extrusion, skew rolling perforation and plate welding. Among them, the hot extrusion method is the most commonly used. It has high production efficiency and great flexibility. It is suitable for extruding multi-specification tube blanks. The prepared tube blanks have a large amount of deformation. Under good lubrication and mold conditions, they can break grains and provide Tube blank with high dimensional accuracy, good plasticity an...

AI Technical Summary

Problems solved by technology

When the specifications of the tube billet remain unchanged, this will cause a substantial increase in the extrusion ratio, which will cause a series of quality problems: 1. Damage to the inner and outer sheaths; 2. Defects on the inner and outer surfaces of the tube billet; 3. Extrusion needles 1. The extrusion die sticks to copper and titanium (or zirconium), and the problem of copper sticking to titanium (or zirconium) leads to frequent replacement, repair or even scrapping of extrusion needles and extrusion dies, which reduces production efficiency and increases production costs; 4. Overweight

However, in the hot extrusion test of titanium, zirconium and their alloy tube blanks, it was found that frequent blockages were used to lubricate the extrusion needle, extrusion die, and extrusion cylinder, which interrupted the extrusion process