Pushing-off test method for testing bonding strength between surfacing layers and between surfacing layers and base metal as well as test pieces

The invention relates to a pushing-off test method for testing bonding strength between surfacing layers and between the surfacing layers and base metal as well as test pieces and belongs to the field of material processing engineering. The test method comprises steps as follows: 1), cross pushing-off test pieces are formed on a surfacing test panel through cutting; 2), a bonding surface of the pushing-off test pieces is located on an interface between the surfacing layers or an interface between the surfacing layers and the base metal; 3), the pushing-off test pieces are assembled to a special clamp, a pushing-off test is performed on a pressure testing device until the pushing-off test pieces are broken along the bonding surface, and a result is obtained through measurement; 4), each group comprises at least two test pieces, and a supplementary test is required to be performed on the test pieces exceeding the error requirement. Each pushing-off test piece comprises an upper cuboid and a lower cuboid which a