首次用扫描隧道显微镜（ＳＴＭ）观察了ＣｕＺｎＡｌ合金的贝氏体和马氏体表面浮突，发现贝氏体浮突是由许多亚单元组成的浮突群，单个亚单元浮突呈“Ｖ”型，不同于马氏体相变不变平面应变的“Ｎ”型浮突，从而说明贝氏体不可能切变形成。同时在实验结果的基础上，提出了贝氏体激发形核－台阶生长的形成机制 For the first time, the bainite and martensite surface bumps of CuZnAl alloy were observed by scanning tunneling microscope (STM). It was found that the bainite bump is a group of bursts composed of many subunits. The single subunit buoy Was “V” type, different from the “N” -type buoyancy of martensite invariant plane strain, which indicated that bainite could not form shear. At the same time, based on the experimental results, the formation mechanism of nucleation-step growth of bainite was proposed