（1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010,
China; 2. Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Baotou 014010, China）
Abstract：As a new type of lightweight metal, porous metal is a kind of metal materials with both structure and
functionality, which has many advantages the traditional metals do not possess, such as small specific gravity, large
specific surface area, and strong heat dissipation ability. It is a new type of functional material research hot spot.
The preparation methods and the principles of porous metal materials, including sintering method, casting method
and other methods are briefly described, porous metal materials used in the fields of filtration and separation,
sound insulation and noise reduction, catalyst carriers, and medical biological materials are introduced. Develop‐
ment status and wide application of a new technology for obtaining porous stainless steel by high temperature vacu‐
um reduction sintering in the form of powder metallurgy with iron oxide scale produced in the rolling process as
the main raw material is proposed. This technology integrates the reduction of iron oxide scale and the sintering of
metal particles into one step, the preparation process is simplified to a certain extent, the preparation time is short‐
ened, and the production efficiency is improved. Finally, the future development trend of porous metal materials
in the future is prospected.
2022, Vol. 32 
