Tungsten alloy is an alloy material with excellent thermal, mechanical, electrical and chemical properties, and is widely used in aviation, aerospace, navigation and other fields. Specifically, the properties of tungsten alloys include high density, high strength, high hardness and good ductility. These properties are not only affected by material composition, raw material ratio, structure and working environment, but also by process parameters such as sintering temperature. Influence.
1. Density
Taking 90WNiFe alloy as an example, in the case of the same chemical composition, raw material ratio and structure and other factors, when the sintering temperature is in the range of 1360°C to 1440°C, the density of tungsten alloy will increase with the increase of sintering temperature. Larger, mainly due to the faster dissolution of tungsten particles at higher temperatures.
2. Strength
Taking 90WNiFe alloy as an example, when the sintering temperature is in the range of 1360 ° C to 1440 ° C, the flexural strength and tensile strength of the tungsten alloy will increase with the increase of temperature, mainly due to the fact that before 1440 ° C, with the As the temperature increases, the content of liquid binder phase increases, so that the tungsten particles can be firmly combined, and the tensile stress increases the strength of the alloy; when the sintering temperature is greater than 1440 ° C, the flexural strength and The tensile strength will decrease with the increase of temperature, and the tensile strength will drop faster.
3. Plasticity
Taking 90WNiFe alloy as an example, when the sintering temperature is in the range of 1360°C to 1440°C, the elongation and reduction of area of the tungsten alloy will increase with the increase of temperature; when the sintering temperature is greater than 1440°C, the alloy’s Elongation and reduction of area decrease with increasing temperature.
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