铁基形状记忆合金是一种很有发展前途的新型功能材料。与传统的Ti-Ni系、Cu系形状记忆合金相比，这种合金原料便宜，容易进行焊接、切削等加工，批量生产后价格可望大幅度降低。本文以Fe．Mn．St系合金为重点，介绍了几种典型的铁基形状记忆合金的性能和特点。形状记忆合金（SM Iron-based shape memory alloy is a promising new functional material. Compared with the traditional Ti-Ni-based and Cu-based shape memory alloys, the alloy material is cheap and easy to process, such as welding and cutting. After the mass production, the price is expected to be greatly reduced. This article to Fe. Mn. St-based alloys, the properties and characteristics of several typical iron-based shape memory alloys are introduced. Shape memory alloy (SM