1 Scope
This national standard specifies the terms and definitions, measuring methods and test report of steel decarburization.
Methods stated in this standard are applicable to determining the depth of decarburization of steel products (billet).
2 Normative References
The following normative documents contain provision which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references, the latest edition of the normative document referred to applies.
GB/T 230.1 Metallic Rockwell Hardness Test—Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) (GB/T 230.l-2004, ISO 6508-1: 1999, MOD)
GB/T 1172-1999 "Conversion of hardness and strength for ferrous metal"
GB/T 4340.1 Metallic materials-Vickers hardness test-Part 1: Test method (GB/T 4340.1-1999, eqv ISO 6507-1: 1997)
GB/T 20126-2006, Unalloyed steel--Determination of low carbon content--Part 2: Infrared absorption method after combustion in an induction furnace (with preheating) (GB/T 20126—2006, ISO 15349—2: 1999, IDT)
3 Terms and Definitions
Contents I
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Measuring Method
4.1 General Provisions
4.2 Metallographic Method
4.3 Hardness Method
4.4 Method of determining the Carbon Content
5 Test Report
Annex A (Informative)
