GB/T 29532-2013 General specification for steel precision hot die forgings English
1 Scope
This standard specifies the requirements, test methods, inspection rules and delivery conditions of steel precision hot forgings (hereinafter referred to as “the forgings”).
This standard is applicable to the hot forgings of rotary body with a mass of less than 18 kg and an outer diameter of not more than 230 mm, which are produced with high-precision dies, special die bases and equipment.
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 (including any amendments) applies.
GB/T 224 Determination of the depth of decarburization of steels
GB/T 231 Metallic materials — Brinell hardness test (all parts)
GB/T 699 Quality carbon structure steels
GB/T 700 Carbon structural steels
GB/T 2828.1 Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 3077 Alloy structure steels
GB/T 5216 Structural steels with specified hardenability bands
GB/T 6394 Determination of estimating the average grain size of metal
GB/T 12362-2003 Tolerances and machining — Allowances of steel die forging
GB/T 13299 Steel — Determination of microstructure
GB/T 13320 Metallographic grading atlas and assessing method for steel die forgings
3 Terms and definitions
For the purposes of this document, the following term and definition apply.
3.1
steel precision hot forgings
hot forgings that obtain a high dimensional accuracy through high-precision dies, special die bases and equipment and that meet the mass tolerance requirements in the temperature range of hot forging process
4 Requirements
4.1 Acceptance bases
The forging drawing, technical agreement, inspection method list and supply contract signed by the supplier and purchaser are the main basis for the inspection and delivery of the forgings.
4.2 Raw material
4.2.1 The steels selected for the forgings shall meet the requirements of GB/T 699, GB/T 700, GB/T 3077 and GB/T 5216.
4.2.2 In addition to those specified in 4.2.1, enterprise standards or special technical agreements signed with steel suppliers may be adopted as additional requirements of steels selected for the forgings for different forging manufacturers.
4.2.3 The selected steel shall be re-inspected and judged as acceptable before putting into production. Re-inspection items shall be determined according to steel inspection standards.
4.3 Process requirements
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Requirements 5 Test methods and inspection rules 6 Delivery conditions Annex A (Normative) Dimensional tolerance, geometrical and position tolerances and other tolerances of the forgings
GB/T 29532-2013 General specification for steel precision hot die forgings English
1 Scope
This standard specifies the requirements, test methods, inspection rules and delivery conditions of steel precision hot forgings (hereinafter referred to as “the forgings”).
This standard is applicable to the hot forgings of rotary body with a mass of less than 18 kg and an outer diameter of not more than 230 mm, which are produced with high-precision dies, special die bases and equipment.
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 (including any amendments) applies.
GB/T 224 Determination of the depth of decarburization of steels
GB/T 231 Metallic materials — Brinell hardness test (all parts)
GB/T 699 Quality carbon structure steels
GB/T 700 Carbon structural steels
GB/T 2828.1 Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 3077 Alloy structure steels
GB/T 5216 Structural steels with specified hardenability bands
GB/T 6394 Determination of estimating the average grain size of metal
GB/T 12362-2003 Tolerances and machining — Allowances of steel die forging
GB/T 13299 Steel — Determination of microstructure
GB/T 13320 Metallographic grading atlas and assessing method for steel die forgings
3 Terms and definitions
For the purposes of this document, the following term and definition apply.
3.1
steel precision hot forgings
hot forgings that obtain a high dimensional accuracy through high-precision dies, special die bases and equipment and that meet the mass tolerance requirements in the temperature range of hot forging process
4 Requirements
4.1 Acceptance bases
The forging drawing, technical agreement, inspection method list and supply contract signed by the supplier and purchaser are the main basis for the inspection and delivery of the forgings.
4.2 Raw material
4.2.1 The steels selected for the forgings shall meet the requirements of GB/T 699, GB/T 700, GB/T 3077 and GB/T 5216.
4.2.2 In addition to those specified in 4.2.1, enterprise standards or special technical agreements signed with steel suppliers may be adopted as additional requirements of steels selected for the forgings for different forging manufacturers.
4.2.3 The selected steel shall be re-inspected and judged as acceptable before putting into production. Re-inspection items shall be determined according to steel inspection standards.
4.3 Process requirements
Contents of GB/T 29532-2013
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test methods and inspection rules
6 Delivery conditions
Annex A (Normative) Dimensional tolerance, geometrical and position tolerances and other tolerances of the forgings
