Combined test block for phased array ultrasonic detection of partition plate

The invention discloses a phased array ultrasonic detection combined test block for a partition plate, relates to a turbine partition plate guide blade detection auxiliary device, and aims to solve the problem that when an existing probe performs detection from an inner circle and an outer circle, signal interference of a non-welding area exists, and the detection implementation difficulty is large. The combined test block disclosed by the invention is used for simulating phased array ultrasonic detection of a crown guide blade of a partition plate and non-fully-fused narrow-gap welding seams of an inner ring and an outer ring; the shape of the combined test block is matched with that of the partition plate, and the combined test block comprises a flat-bottom hole test block, a transverse through hole test block and a rectangular groove test block; the flat-bottom hole test block is used for detecting and calibrating by a longitudinal wave direct injection method; the transverse through hole test block is use