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GB/T 39192-2020 English PDF (GBT39192-2020)
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GB/T 39192-2020: Heat treatment of superalloy parts
GB/T 39192-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.200
J 36
Heat treatment of superalloy parts
ISSUED ON: OCTOBER 11, 2020
IMPLEMENTED ON: MAY 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Heat treatment equipment and technique materials ... 6
5 Heat treatment technique ... 9
6 Technique process control ... 25
7 Quality inspection ... 28
8 Repeated heat treatment ... 29
Annex A (informative) Calculation of heat treatment effective thickness ... 30
Heat treatment of superalloy parts
1 Scope
This Standard specifies requirements such as equipment and technique
materials, heat treatment technique specification, technique process control
and quality inspection for heat treatment of superalloy parts.
This Standard is applicable to heat treatment of deformed superalloy and
equiaxed crystal casting superalloy for equipment manufacturing industry,
unless otherwise specified in special technical documents or order contracts.
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 228.1, Metallic materials - Tensile testing - Part 1: Method of test at
room temperature
GB/T 228.2, Metallic materials - Tensile testing - Part 2: Method of test at
elevated temperature
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 231.1, Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 2039, Metallic materials - Uniaxial creep testing method in tension
GB/T 3634.2, Hydrogen - Part 2: Pure hydrogen, high pure hydrogen and
ultrapure hydrogen
GB/T 4842, Argon
GB/T 4844, Pure helium, high pure helium and ultra-pure helium
GB/T 6394, Metal - Methods for estimating the average grain size
GB/T 7232, Terminology of metal heat treatment
GB/T 8979, Pure nitrogen and high purity nitrogen and ultra-pure nitrogen
GB/T 10066.1, Test methods for electroheating and electromagnetic
processing installations - Part 1: General
GB/T 10067.1, Basic specifications for electroheating and electromagnetic
processing installations - Part 1: General
GB/T 10067.4, Basic specifications for electroheat installations - Part 4:
Indirect resistance furnaces
GB/T 14999.7, Test methods for grain sizes, primary dendrite spacing and
microshrinkage of superalloy castings
GB 15735, Requirements for the safety and health in production process of
metal heat treatment
GB/T 30825, Pyrometry for heat treatment
GB/T 32541, Quality control system for heat treatment
JB/T 6955, The specification of quenching medium for heat treatment
JB/T 10457, Technological requirements of liquid quenching apparatus
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
7232 as well as the followings apply.
3.1 temperature equalization time
the time FROM when all the temperature control thermocouples reach the
technique setting temperature TO the time that the core temperature of the
workpiece reaches the lower limit temperature of the furnace temperature
uniformity required by the technique setting temperature
3.2 metallurgical transformation time
the time FROM when the temperature of the core of the workpiece reaches the
lower limit temperature of the furnace temperature uniformity required by the
technique setting temperature TO the time when the workpiece is out of the
furnace
4.1.3 Vacuum furnace
4.1.3.1 The vacuum pressure of the vacuum furnace shall not be greater than
0.067Pa. The cold pressure rise rate shall not be greater than 1.33Pa/h. The
determination method is in accordance with GB/T 10066.1.
4.1.3.2 When the vacuum furnace is heated by backfilling inert gas protection,
the vacuum furnace shall be equipped with furnace gas pressure and dew point
monitoring system. The dew point of the furnace atmosphere should not be
higher than -51°C.
4.1.3.3 When the furnace temperature uniformity test is performed on the
vacuum furnace, it shall be carried out at the lowest vacuum pressure used in
the production of the workpiece. But it does not need to be lower than 1.3×10-
3Pa.
4.1.3.4 Vacuum sensor, vacuum pressure display and recorder shall be
calibrated regularly. It is recommended to conduct a comparison test on the
vacuum measurement and recording system every six months. The maximum
allowable error is ±0.5 orders of magnitude. See formula (1):
Where,
Pa - Indicated value of vacuum sensor, vacuum pressure display and recorder;
Pt - Indicated value of standard measuring equipment.
4.1.3.5 If the vacuum furnace is equipped with a dew point measuring device,
it shall be calibrated regularly. The maximum allowable measurement error is
±5°C.
4.1.4 Inert gas furnace
4.1.4.1 During the furnace temperature uniformity test, the gas pressure in the
furnace shall be consistent with the heat treatment of the workpiece.
4.1.4.2 The dew point of the atmosphere in the inert gas furnace shall not be
higher than -51°C.
4.1.4.3 The dew point measurement system shall be calibrated regularly. The
maximum allowable measurement error is ±5°C.
4.2 Cooling equipment
4.2.1 Quenching tank
evenly heated and cooled.
6.1.4 When using inert atmosphere heat treatment or vacuum heat treatment,
the part of the fixture that contacts the workpiece shall also be clean. Avoid
bonding between the fixture and the workpiece at high temperature during
vacuum heat treatment.
6.2 Loading to furnace
6.2.1 There shall be enough space between adjacent workpieces. Especially
when stacking is used, it shall be ensured that the furnace gas can flow
smoothly, evenly heat and cool on its inner and outer surfaces.
6.2.2 The workpiece shall be placed steadily on the rack, tray, frame or special
fixture, so as to ensure that all the workpieces are in the effective heating zone.
6.2.3 When calculating the heat preservation time by loading a thermocouple,
the thermocouple shall be inserted into the previously machined hole of the
workpiece or equivalent test block. And the top of the thermocouple shall be in
contact with the bottom of the hole. The gap between the hole and the
thermocouple is sealed with ceramic fiber and so on. The bottom of the hole
shall be located at the center of the largest section of the workpiece or
equivalent test block. If an equivalent test block is used, its length shall be at
least 3 times the maximum thickness.
6.3 Heating
6.3.1 For workpieces with large dimensions and complex shapes, it is
recommended to use preheating or segmented heating when heating for solid
solution treatment. The preheating temperature is generally 800°C~850°C.
When the solid solution treatment temperature is above 1000°C, generally use
two or more section heating. For heat treatment with preheating or section
heating, the workpiece shall be put into the furnace below the preheating
temperature or the temperature of the low temperature section of the section
heating.
6.3.2 When there is no preheating or segmented heating requirem...
Get QUOTATION in 1-minute: Click GB/T 39192-2020
Historical versions: GB/T 39192-2020
Preview True-PDF (Reload/Scroll if blank)
GB/T 39192-2020: Heat treatment of superalloy parts
GB/T 39192-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.200
J 36
Heat treatment of superalloy parts
ISSUED ON: OCTOBER 11, 2020
IMPLEMENTED ON: MAY 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Heat treatment equipment and technique materials ... 6
5 Heat treatment technique ... 9
6 Technique process control ... 25
7 Quality inspection ... 28
8 Repeated heat treatment ... 29
Annex A (informative) Calculation of heat treatment effective thickness ... 30
Heat treatment of superalloy parts
1 Scope
This Standard specifies requirements such as equipment and technique
materials, heat treatment technique specification, technique process control
and quality inspection for heat treatment of superalloy parts.
This Standard is applicable to heat treatment of deformed superalloy and
equiaxed crystal casting superalloy for equipment manufacturing industry,
unless otherwise specified in special technical documents or order contracts.
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 228.1, Metallic materials - Tensile testing - Part 1: Method of test at
room temperature
GB/T 228.2, Metallic materials - Tensile testing - Part 2: Method of test at
elevated temperature
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 231.1, Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 2039, Metallic materials - Uniaxial creep testing method in tension
GB/T 3634.2, Hydrogen - Part 2: Pure hydrogen, high pure hydrogen and
ultrapure hydrogen
GB/T 4842, Argon
GB/T 4844, Pure helium, high pure helium and ultra-pure helium
GB/T 6394, Metal - Methods for estimating the average grain size
GB/T 7232, Terminology of metal heat treatment
GB/T 8979, Pure nitrogen and high purity nitrogen and ultra-pure nitrogen
GB/T 10066.1, Test methods for electroheating and electromagnetic
processing installations - Part 1: General
GB/T 10067.1, Basic specifications for electroheating and electromagnetic
processing installations - Part 1: General
GB/T 10067.4, Basic specifications for electroheat installations - Part 4:
Indirect resistance furnaces
GB/T 14999.7, Test methods for grain sizes, primary dendrite spacing and
microshrinkage of superalloy castings
GB 15735, Requirements for the safety and health in production process of
metal heat treatment
GB/T 30825, Pyrometry for heat treatment
GB/T 32541, Quality control system for heat treatment
JB/T 6955, The specification of quenching medium for heat treatment
JB/T 10457, Technological requirements of liquid quenching apparatus
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
7232 as well as the followings apply.
3.1 temperature equalization time
the time FROM when all the temperature control thermocouples reach the
technique setting temperature TO the time that the core temperature of the
workpiece reaches the lower limit temperature of the furnace temperature
uniformity required by the technique setting temperature
3.2 metallurgical transformation time
the time FROM when the temperature of the core of the workpiece reaches the
lower limit temperature of the furnace temperature uniformity required by the
technique setting temperature TO the time when the workpiece is out of the
furnace
4.1.3 Vacuum furnace
4.1.3.1 The vacuum pressure of the vacuum furnace shall not be greater than
0.067Pa. The cold pressure rise rate shall not be greater than 1.33Pa/h. The
determination method is in accordance with GB/T 10066.1.
4.1.3.2 When the vacuum furnace is heated by backfilling inert gas protection,
the vacuum furnace shall be equipped with furnace gas pressure and dew point
monitoring system. The dew point of the furnace atmosphere should not be
higher than -51°C.
4.1.3.3 When the furnace temperature uniformity test is performed on the
vacuum furnace, it shall be carried out at the lowest vacuum pressure used in
the production of the workpiece. But it does not need to be lower than 1.3×10-
3Pa.
4.1.3.4 Vacuum sensor, vacuum pressure display and recorder shall be
calibrated regularly. It is recommended to conduct a comparison test on the
vacuum measurement and recording system every six months. The maximum
allowable error is ±0.5 orders of magnitude. See formula (1):
Where,
Pa - Indicated value of vacuum sensor, vacuum pressure display and recorder;
Pt - Indicated value of standard measuring equipment.
4.1.3.5 If the vacuum furnace is equipped with a dew point measuring device,
it shall be calibrated regularly. The maximum allowable measurement error is
±5°C.
4.1.4 Inert gas furnace
4.1.4.1 During the furnace temperature uniformity test, the gas pressure in the
furnace shall be consistent with the heat treatment of the workpiece.
4.1.4.2 The dew point of the atmosphere in the inert gas furnace shall not be
higher than -51°C.
4.1.4.3 The dew point measurement system shall be calibrated regularly. The
maximum allowable measurement error is ±5°C.
4.2 Cooling equipment
4.2.1 Quenching tank
evenly heated and cooled.
6.1.4 When using inert atmosphere heat treatment or vacuum heat treatment,
the part of the fixture that contacts the workpiece shall also be clean. Avoid
bonding between the fixture and the workpiece at high temperature during
vacuum heat treatment.
6.2 Loading to furnace
6.2.1 There shall be enough space between adjacent workpieces. Especially
when stacking is used, it shall be ensured that the furnace gas can flow
smoothly, evenly heat and cool on its inner and outer surfaces.
6.2.2 The workpiece shall be placed steadily on the rack, tray, frame or special
fixture, so as to ensure that all the workpieces are in the effective heating zone.
6.2.3 When calculating the heat preservation time by loading a thermocouple,
the thermocouple shall be inserted into the previously machined hole of the
workpiece or equivalent test block. And the top of the thermocouple shall be in
contact with the bottom of the hole. The gap between the hole and the
thermocouple is sealed with ceramic fiber and so on. The bottom of the hole
shall be located at the center of the largest section of the workpiece or
equivalent test block. If an equivalent test block is used, its length shall be at
least 3 times the maximum thickness.
6.3 Heating
6.3.1 For workpieces with large dimensions and complex shapes, it is
recommended to use preheating or segmented heating when heating for solid
solution treatment. The preheating temperature is generally 800°C~850°C.
When the solid solution treatment temperature is above 1000°C, generally use
two or more section heating. For heat treatment with preheating or section
heating, the workpiece shall be put into the furnace below the preheating
temperature or the temperature of the low temperature section of the section
heating.
6.3.2 When there is no preheating or segmented heating requirem...
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