Method for preparing Ni-Fe-based high-temperature binder phase hard alloy

Abstract

The invention discloses a method for preparing a Ni-Fe-based high-temperature binder phase hard alloy. The method comprises the following steps of firstly mixing nickel powder, iron powder, chromium powder, molybdenum powder and aluminum powder in a predetermined mass ratio and carrying out high-energy ball milling; carrying out ordinary ball milling on powder subjected to high-energy ball milling, tungsten carbide powder, titanium carbide powder and vanadium carbide powder to obtain a mixed powder; loading the prepared mixed powder into a mold and pressing by virtue of cold press to obtain a green body; carrying out sinter molding on the green body material under the protective atmosphere to finally obtain the Ni-Fe-based high-temperature binder phase hard alloy material. According to the method, Ni-Fe-based mechanical alloying powder instead of Co powder is used as a binder, and the prepared hard alloy has Vickers hardness equal to or greater than 1530 / kg.mm<-2>, flexural strength equal to or greater than 4880MPa and tensile strength equal to or greater than 4562MPa at 1000 DEG C.

Description

technical field

[0001] The invention relates to a preparation method of hard alloy material. Background technique

[0002] Cemented carbide is a high-temperature wear-resistant material based on refractory metal hard compounds (WC, TiC, etc.), using metal as a binder, and using energy-saving, green, less-chip or no-chip near-net-shape powder metallurgy technology. The excellent comprehensive performance and high cutting processing efficiency of cemented carbide make it widely used in high-speed cutting tools such as high-strength steel and high-quality casting alloys, molds for powder forming and metal plastic processing, impact tools, etc. In response to the current development trend of energy-saving, green and high-efficiency industries in the society, higher requirements are put forward for the comprehensive performance and lifespan of cemented carbide tools and molds, especially in high-end industrial applications such as aerospace, microelectronics, and micromachining. ...

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