JB/T 10174-2008Quality inspection methods for shot peening of iron and steel parts (English PDF)

Foreword

This Standard replaces JB/T 10174-2000 "Methods of quality inspection on shot-peening for steel-iron parts".

Compared with JB/T 10174-2000, the main changes in this Standard are as follows.

- regulated and labeled various information on the cover;

- adjusted and filled in related elements in the "Foreword";

- standardized the guide of "Normative reference", added normative reference, and marked the adopted project;

- standardized the terms and definitions;

- standardized the "NOTEs" in table (see Table 1);

- standardized the "unit" in table (see Table 2);

- modified "Annex A (standard)" in the previous edition to "Annex A (normative)" (see 5.1 and Annex A). Annex A of this Standard is normative.

1 Scope

This Standard specifies the determination methods for the types, technical requirements, testing devices, shot strength and covert rate of projectile used for shot-peening.

This Standard is applicable to the inspection on shot-peening for steel-iron parts.

2 Normative references

The following standards contain the provisions which, through reference in this Standard, constitute the provisions of this Standard. For dated references, subsequent amendments (excluding corrections) or revisions do not apply to this Standard. However, the parties who enter into agreement based on this Standard are encouraged to investigate whether the latest versions of these documents are applicable. For undated reference documents, the latest versions apply to this Standard.

GB/T 230.1, Metallic materials - Rockwell hardness test - Part 1. Test method (scales A, B, C, D, E, F, G, H, K, N, T) [GB/T 230.1-2004, ISO 6508-1:1999 Metallic materials-Rockwell hardness test-Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N,T), MOD]

GB/T 1298, Carbon tool steels (GB/T 1298-1986, neq ASTM A686:1979)

GB/T 6003.1, Test sieves of metal wire cloth (GB/T 6003.1-1997, eqv ISO 3310-1:1990)

YB/T 5058, Cold-rolled spring and tool steel strips

YB/T 5149, Cast steel shot

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

4 Projectile material for shot-peening

6 Measurements of shot strength and convert rate

7 Quality control of part shot-peening

7.1 According to the working conditions and performance requirements of steel parts, the shot strength value is determined according to the technical requirements of the product drawings, generally be 0.35A or more.

7.2 The convert rate shall meet the technical requirements of the product drawings, generally not be less than 200%.

7.3 Appropriate shot strength shall be used for different part. For super thin or small-section parts, high shot strength must not be used so as to prevent the residual stress caused in the center of the part which shall result in deformation.

7.4 When there are special requirements for part shot-peening sites, they must be specified in the contract or related drawings so as to take appropriate protective measures.

7.5 The shot-peened parts must not be shaped by any other mechanical method other than the shot-peening method.

7.6 After shot-peening, if the parts need to be heated, the heating temperature shall generally be controlled within 200°C.

7.7 If the surface of the shot-peened part is to be ground or polished, the depth of the surface to be removed shall not exceed 10% of the value of the arc height of the shot strength almen A.

7.8 The hardness test shall not be carried out for the peened site of the part.

7.9 The parts shall be prevented from corrosion after shot-peening until the next process. […]