GB/T 23339-2018Internal combustion engines—Crankshafts—Specification (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 23339-2009 "Crankshaft technical conditions." This standard compared with GB/T 23339-2009, In addition to editorial changes outside the main technical changes are as follows.

--- Modify the normative references (see Chapter 2, 2009 edition Chapter 2);

--- Modify the chemical composition of forged steel crankshaft requirements (see 3.2.1.2, 2009 edition 3.2.1.2.1);

--- Added "Class A non-quenched and tempered steel inclusions level determined by the supply and demand sides negotiated" (see 3.2.1.3);

--- Increasing the chemical composition of ductile iron crankshaft material, mechanical properties requirements (see 3.2.2.2, 3.2.2.3);

--- Modify the straightness technical requirements for the implementation of the provisions of the drawings (see 3.3.7, 3.4.6, 2009 version 3.3.6, 3.4.4);

--- Modify the grain size of crankshaft forgings (see 3.8.3.3.3.3.3.3, 2009 edition of 3.3.7.1, 3.3.7.3);

--- Modify the microstructure requirements (see 3.4.1.7, 2009 edition 3.4.5.1);

--- Modify the surface of the crankshaft to strengthen the choice of way (see 3.5.1.1, 2009 edition 3.5.1);

--- Modify forged steel crankshaft journal surface hardened layer depth and hardness requirements (see 3.5.1.2.1, 2009 edition 3.5.2.1);

--- Modify the requirements of journal quenching (see 3.5.1.2.3, 2009 edition 3.5.2.3);

--- Increased fillet rolling requirements (see 3.5.1.5);

--- Revised surface roughness requirements (see 3.5.2, 2009 version 3.6 of Table 2, 4.8.8);

--- Removed "6-cylinder engine and crankshaft above, allowing the use of intermediate support" (see 2009 version 3.7.5);

--- Increased torsional fatigue strength requirements and test methods (see 3.5.8,4.15);

--- Revised endurance test requirements (see 3.5.9, 2009 version 3.12);

--- Modify the sampling site requirements (see 4.4.1, 2009 edition 4.4.1);

--- Modify the hardened layer test method (see 4.2.2.2, 2009 edition 4.5.2.2);

--- Deleted "The total box must not exceed the total mass of 50kg (single package, not subject to this limit)" (see 2009 version 6.2).

1 Scope

This standard specifies the technical requirements of internal combustion engine crankshaft, test methods, inspection rules and signs, packaging, transportation and storage.

This standard applies to reciprocating internal combustion engine crankshafts (hereinafter referred to as "crankshaft") with a cylinder diameter of not more than 200mm.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 223 (all sections) - Methods for chemical analysis of iron, steel and alloy

GB/T 225 steel quenching end quench test method (Jominy test)

GB/T 228.1 Tensile testing of metallic materials - Part 1. Room temperature test method

GB/T 229 Charpy pendulum impact test method for metallic materials

GB/T 230.1 Metallic materials Rockwell hardness test - Part 1. Test methods (A, B, C, D, E, F, G, H, K, N, T scale)

GB/T 231.1 Brinell hardness test of metallic materials - Part 1. Test methods

GB/T 699-2015 high-quality carbon structural steel

GB/T 1147.2 small and medium power internal combustion engines - Part 2. Test methods

GB/T 1184-1996 Tolerances on shape and position tolerances

Ductile iron parts

GB/T 1800.1-2009 Geometrical product specifications (GPS) - Limits and mating - Part 1. Tolerance, tolerance and mating basis

GB/T 1958 Geometrical product specifications (GPS) shape and position tolerance testing requirements

GB/T 2828.1 Sampling procedures for inspection - Part 1. Batch inspection sampling plan by acceptance quality limit (AQL)

GB/T 3077-2015 alloy structural steel

GB/T 3821 small and medium power internal combustion engine cleanliness limits and methods of measurement

GB/T 4340.1 Vickers hardness test of metallic materials - Part 1. Test methods

GB/T 5617 steel induction quenching or quenching after the determination of the effective hardened layer depth

Metallic average grain size - Determination of GB/T 6394-2002

Ductile iron metallographic examination

GB/T 10561-2005 Determination of non-metallic inclusions in steel content of the standard grading test microscopy

Steel parts - Determination of depth of nitrided layer and microstructure test GB/T 11354-2005

GB/T 13299-1991 steel microstructure evaluation method

Metallographic structure of steel die forgings grading charts and evaluation methods

Non-quenched and tempered mechanical structural steel

GB/T 19055 Automotive engine reliability test methods

JB/T 6729 internal combustion engine crankshaft, camshaft magnetic particle inspection

Steel induction hardening test of metallographic examination

Induction hardened metallographic examination of pearlitic ductile iron parts