High Density WNiFe Bar

(1) Under the condition of slow cooling after sintering, the mechanical properties of High Density WNiFe bars are significantly lower than those of traditional nickel-iron ratio tungsten alloy, while under the condition of solution quenching, the comprehensive mechanical properties of High Density WNiFe bar are much better than traditional nickel-iron ratio tungsten alloy.
(2) Under the condition of solution quenching, the strength and toughness of tungsten alloy increase with the increase of nickel-iron ratio. When the nickel-iron ratio reaches 9/1, the mechanical properties of tungsten alloy reach the maximum value, and then the alloy performance decreases with the continuous increase of Ni/Fe ratio, and the optimal Ni/Fe ratio increases from 7/3 to 9/1.
(3) When the tungsten alloy with high Ni-Fe ratio is sintered and cooled slowly, there are non-dispersive β phase precipitation in the bonding phase of the alloy and on the interface between tungsten and bonding phase, which seriously harm the mechanical properties of the alloy. The solid solution quenching heat treatment process can inhibit the β phase precipitation in the bonding phase, so that the strength and toughness of the alloy are greatly improved.

1. Used in high-temperature engineering applications, such as gas turbines and rocket engines.
2. Used in electrical and electronic applications, such as filaments in incandescent light bulbs and electronic contacts.
3. Used in manufacturing of tool steels and high-speed steels for cutting and drilling tools.
4. Used in radiation shielding, due to its high density and ability to absorb radiation.
5. Used in the production of heavy alloys for counterweights, aircraft parts, and ballast weights.
6. Used as a component in some types of welding electrodes and arc-welding rods.