Standard No.:	GB/T 34882-2017
English Name:	Induction hardening and tempering of iron and steel parts
Chinese Name:	钢铁件的感应淬火与回火
Professional Classification:	GB    National Standard
Issued by:	AQSIQ; SAC
Issued on:	2017-11-01
Implemented on:	2018-5-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	7500 words
Price(USD):	140.0
Delivery:	via email in 1 business day

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is developed in accordance with the rules given in GB/T 1.1-2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This standard was proposed by and is under the jurisdiction of the National Heat Treatment Standardization Technology Committee (SAC/T 75). Induction hardening and tempering of iron and steel parts 1 Scope This standard specifies the basic requirements for quality control, safety and health and labor protection of induction hardening and tempering on the surface of iron and steel parts. This standard is applicable to the heat treatment process of induction hardening and tempering and induction hardening on the surface of iron and steel parts. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. 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 699 Quality carbon structure steels GB/T 1182 Geometrical Product Specifications (GPS)—Geometrical tolerances of form orientation location and run-out GB/T 1220 Stainless steel bar GB/T 1221 Heat-resistant steel bar GB/T 1222 Spring steels GB/T 1298 Carbon tool steels GB/T 1299 Tool and mould steels GB/T 1348 Spheroidal graphite iron castings GB/T 3077 Alloy structure steels GB/T 4340.1 Metallic materials—Vickers hardness test—Part 1: Test method GB/T 4341.1 Metallic materials—Shore hardness test—Part 1: Test method GB/T 5216 Structural steels with specified hardenability bands GB/T 5617 Determination of effective depth of hardening after induction or flame hardening of steel GB/T 6967 Martensitic stainless steel castings for general engineering application GB/T 7232 Terminology of metal heat treatment GB/T 8121 The terminology of technological materials for heat treatment GB 8702 Controlling limits for electromagnetic environment GB/T 9439 Grey iron castings GB/T 9440 Malleable iron castings GB/T 9452 Testing method for working zone of heat treatment furnace GB/T 10201 Regulations of proper usage of electricity in heat treatment industry GB/T 11352 Carbon steel castings for general engineering purpose GB/T 12603 Classifications and designations for metal heat treatment GB/T 13314 General specifications of forged steel work rolls for cold rolling GB/T 13324 Terminology of heat treatment equipment GB 15735 Requirements for the safety and health in production process of metal heat treatment GB/T 15822.1 Non-destructive testing—Magnetic particle testing—Part1: General principles GB/T 16923 Normalizing and annealing of steel parts GB/T 17358 Power consumption, measurement, and testing in heat treating production GB/T 18254 High-carbon chromium bearing steel GB/T 18449.1 Metallic materials—Knoop hardness test—Part 1: Test method GB/Z 18718 Energy saving directives for heat treatment GB/T 19944 Fuel consumption calculation and measurement method in heat treating production GB/T 30822 Environment protection technical requirement for heat treatment GB/T 32541 Quality control system for heat treatment JB/T 3593 Heat treated sintered iron-based structural materials JB/T 4120 Heavy forged alloy steel backup rolls JB/T 6955 The specification of quenching medium for heat treatment JB/T 9204 Metallographic examination of induction hardened steel parts JB/T 9205 Metallographic examination of pearlitic graphite cast iron parts induction hardened JB/T 9218 Non-destructive testing—Test method for penetrant testing 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 7232, GB/T 8121, GB/T 13324, GB/T 9452, GB/T 16923 as well as the following ones apply. 3.1 induction hardening and tempering hardening is cool the iron and steel parts with appropriate cooling medium after heating them until the temperature above Ac3 or Ac1 point by induction heating for surface hardening of all or part of iron and steel parts; while tempering is cool them again after heating them to appropriate temperature below Ac1 point in tempering furnace or by induction heating in order to adjust hardness and increase toughness. 3.2 distortion changes of the workpiece after heat treatment from the to-be-treated workpiece in shape or dimension 4 Designation of induction hardening and tempering The designation of induction hardening and tempering on the surface of iron and steel parts shall meet the requirements of GB/T 12603, and its designation is 521-04. 5 To-be-treated workpiece 5.1 Common materials Common materials for induction hardening and tempering workpieces shall be compliant with grades listed in Table 1 or equivalent to their chemical composition. 5.2 State of to-be-treated workpiece 5.2.1 The state of to-be-treated workpiece shall be recorded according to the items specified in Table 2, and be preserved. 5.2.2 The appearance, shape, dimension and accuracy of the to-be-treated workpiece shall be recorded according to the items specified in Table 3, and be preserved. Table 1 Common material of workpiece for induction hardening and tempering Category Grade Quality carbon structure steels GB/T 699 Structural steels with specified hardenability bands GB/T 5216 Alloy structure steels GB/T 3077 Spring steels GB/T 1222 High-carbon chromium bearing steel GB/T 18254 Carbon alloy steels GB/T 1298 Tool and mould steels GB/T 1299 Stainless steel bars GB/T 1220 Heat-resistant steel bars GB/T 1221 Forged steel work rolls for cold rolling GB/T 13314 Carbon steel castings for general engineering purpose GB/T 11352 Martensitic stainless steel castings GB/T 6967 Grey iron castings GB/T 9439 Malleable iron castings GB/T 9440 Spheroidal graphite iron castings GB/T 1348 Sintered iron-based structural materials JB/T 3593 Note 1: By reference to the grades or chemical compositions shown in the table, only equivalent structural steels with specified hardenability bands and various alloy steel castings may be used. Note 2: For the carburized steel (grade shown in GB/T 34889) which is inductively hardened and tempered after carburizing, the relevant content of this standard is also applicable to it. Note 3: Carbon structural steel forgings refer to the grade of quality carbon structure steels. While alloy steel forgings and castings refer to the chemical composition of alloy structure steel. Note 4: Special requirements may be made if necessary.

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Designation of induction hardening and tempering 5 To-be-treated workpiece 6 Induction hardening and tempering equipment 7 Procedure and operation of induction hardening and tempering 8 Quality requirement and inspection 9 Quality acceptance 10 Requirements of safety, health and labor protection 11 Requirement of energy consumption and environmental protection 12 Product report form