Special feed for H-type fragile tungsten-based MIM (metal injection molding)

Abstract

The invention discloses an H-type fragile tungsten-based feed special for MIM. The H-type fragile tungsten-based feed comprises an H-type fragile tungsten-based material and a wax-based binder. The wax-based binder is prepared from 40 to 45 parts of Brazil wax, 12 to 20 parts of sliced paraffin, 20 to 35 parts of HDPE (High-Density Polyethylene), 3 to 6 parts of PP (Propene Polymer) and 1 to 3 parts of SA (Styrene Acrylate). The H-type fragile tungsten-based MIM feed has the advantages that the characteristic that a lead material is soft in texture is overcome, the penetrability is guaranteed, and the constraint of international regulations is avoided; compared with a traditional tungsten-nickel-iron alloy, the adopted H-type fragile tungsten-based MIM special feed has fragile brittleness on the premise that the hardness of the tungsten-based alloy is kept; the special feed for the wax-based binder system MIM is few in preparation process, simple in process control and easy to realize mass production; the fluidity is good, and injection molding is facilitated; and the used binder does not generate polluting tail gas in the subsequent process, and the requirement of an environment-friendly treatment process is easy to realize.

Description

technical field [0001] The invention relates to the technical field of new materials, to be precise, to H-type brittle tungsten-based MIM special feeding material. Background technique [0002] The military put forward the following indicators for a new type of shotgun under development: 1. Self-injury protection for one's own soldiers, that is, when the bullet shoots out a distance of 5 meters at a muzzle velocity of 370-400 m / s, the projectile hits a reinforced concrete wall. Broken can't rebound. 2. It must be lethal to the enemy, that is, when the bullet shoots out a distance of 50 meters at a muzzle velocity of 370-400 m / s, the projectile must penetrate the 25mm pine board. 3. The number of projectiles loaded per bullet shall not be less than 20. Fourth, the projectile must be spherical, and the size must be guaranteed within ± 0.05mm. [0003] Defects and deficiencies of the prior art: [0004] 1. The non-rebound projectiles currently used are made of lead. Becaus...

AI Technical Summary

Problems solved by technology

4. The projectile must be spherical, and the size must be within ±0.05mm

[0005] 2. The existing projectiles based on tungsten-nickel-iron have no problem in satisfying the penetration. However, after the projectile hits the reinforced concrete wall within 5 meters, the projectile will not be broken and will bounce back, so it cannot be used against one's own side. Warrior's Self-Injury Protection

But there is no such feed material suitable for metal powder injection molding production process on the market