Gear flame or induction hardening process and its quality control
1 Scope
This standard specifies the relevant terms, material selection, applicable equipment, processes and quality inspection for gear flame and induction hardening (high frequency, super audio frequency and medium frequency).
This standard is applicable to the process and quality control of flame and induction hardening for gears made of medium carbon structural steels, alloy structural steels, low hardenability steels and other materials.
2 Normative references
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. At the time of publication, all editions listed were valid. All normative references are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the normative standards indicated below.
GB/T 230-1991 Metallic materials - Rockwell hardness test
GB/T 699-1988 Quality carbon structure steel - Technical requirements
GB/T 3077-1988 Alloy structure steel - Technical requirements
GB/T 4340-1984 Metallic materials - Vickers hardness test
GB/T 4341-1984 Metallic materials - Shore hardness test
GB/T 5617-1995 Determination of effective depth of hardening after induction or flame hardening of steel
GB/T 8539-1987 General specification for quality inspection of gear materials and their heat treatment
GB/T 9175-1985 Hygienic standard for environmental electromagnetic waves
JB/T 4393-1987 Technical requirements for polyvinyl alcohol of quenching media
JB/T 9200-1999 Flame hardening and tempering of iron and steel parts
JB/T 9201-1999 Induction hardening and tempering of iron and steel parts
JB/T 9204-1999 Metallographic examination of induction hardened steel parts
YB/T 2009-1981 Quality carbon structural steels with titanium of low hardenability
YB/T 5148-1993 Metal-methods for estimating the average grain size
3 Terms and definitions
For the purposes of this standard, the following definitions apply.
3.1
tooth surface hardness
surface hardness measured in the middle of the working depth of a finished gear tooth
3.2
bottom land hardness
surface hardness at the bottom land of the tooth space in the middle of the face width of a finished gear
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Gear materials
5 Equipment requirements
6 Pre-treatment of gears for flame or induction hardening
7 Process specification for gear flame and induction hardening
8 Quality control and inspection methods for gear flame or induction hardening
9 Test report
Annex A (Informative) Relationship between tempering temperature and hardness of commonly-used steels
Gear flame or induction hardening process and its quality control
1 Scope
This standard specifies the relevant terms, material selection, applicable equipment, processes and quality inspection for gear flame and induction hardening (high frequency, super audio frequency and medium frequency).
This standard is applicable to the process and quality control of flame and induction hardening for gears made of medium carbon structural steels, alloy structural steels, low hardenability steels and other materials.
2 Normative references
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. At the time of publication, all editions listed were valid. All normative references are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the normative standards indicated below.
GB/T 230-1991 Metallic materials - Rockwell hardness test
GB/T 699-1988 Quality carbon structure steel - Technical requirements
GB/T 3077-1988 Alloy structure steel - Technical requirements
GB/T 4340-1984 Metallic materials - Vickers hardness test
GB/T 4341-1984 Metallic materials - Shore hardness test
GB/T 5617-1995 Determination of effective depth of hardening after induction or flame hardening of steel
GB/T 8539-1987 General specification for quality inspection of gear materials and their heat treatment
GB/T 9175-1985 Hygienic standard for environmental electromagnetic waves
JB/T 4393-1987 Technical requirements for polyvinyl alcohol of quenching media
JB/T 9200-1999 Flame hardening and tempering of iron and steel parts
JB/T 9201-1999 Induction hardening and tempering of iron and steel parts
JB/T 9204-1999 Metallographic examination of induction hardened steel parts
YB/T 2009-1981 Quality carbon structural steels with titanium of low hardenability
YB/T 5148-1993 Metal-methods for estimating the average grain size
3 Terms and definitions
For the purposes of this standard, the following definitions apply.
3.1
tooth surface hardness
surface hardness measured in the middle of the working depth of a finished gear tooth
3.2
bottom land hardness
surface hardness at the bottom land of the tooth space in the middle of the face width of a finished gear
Contents of JB/T 9171-1999
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Gear materials
5 Equipment requirements
6 Pre-treatment of gears for flame or induction hardening
7 Process specification for gear flame and induction hardening
8 Quality control and inspection methods for gear flame or induction hardening
9 Test report
Annex A (Informative) Relationship between tempering temperature and hardness of commonly-used steels
