Test Strip, Holder and Gage for Shot Peening

Author:  SAE
Source:  SAE: J 442 Aug79
Doc ID:  1979009
Year of Publication:  1979
Abstract:  
This SAE Standard is supplemental by an SAE Recommended Practice, Procedures for Using Standard Shot Peening Test Strip, SAE J443. Outline of Method of Control--The control of a peening machine operation is primarily a matter of the control of the properties of a blast of shot in its relation to the work being peened. The basis of measurement of these properties is as follows: If a flat piece of steel is clamped to a solid block and exposed to a blast of shot, it will be curved upon removal from the block. The curvature will be convex on the peened side. The extent of this curvature on a standard sample serves as a means of measurement of the blast. The degree of curvature depends upon the properties of the blast, the properties of the test strip, and the nature of exposure to the blast, as described below. Properties of the blast are the velocity, size, shape, density, kind of material, and hardness of the shot. The properties of exposure to the blast are the length of time, angle of impact, and shot flow rate. The properties of the test strip depend upon the physical dimensions and mechanical properties of the strip. Based on these principles, the SAE has adopted the following standards: test strips, holding block, and gage. Specifications of these parts, the method of use, and a standard designation are presented herein.