Some standard content:
1C525.200
Machinery Industry Standard of the People's Republic of China
JB7T9208-1499
Classifications and symbols of controlled atmospheres
Classifications and symbols of controlled atmospheres1999-06-24 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9208-1999
This standard is a revision of ZBJ36013-9 Classifications and symbols of controlled atmospheres. It will be rectified according to relevant regulations, and the main technical contents will not be changed.
This standard replaces ZBJ36013-89 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Heat Treatment Standardization. The responsible drafting unit of this standard is Beijing Institute of Mechanical and Electrical Engineering. The responsible drafters of this standard are Xu Jiming, Fan Dongcha and Rong Xiaohong. This standard was issued on March 29, 1989. 1 Scope
Machinery Industry Standard of the People's Republic of China
Classification and Code of Controlled Atmospheres
Chinese standards of centralised atmospheres JB/T9206-1
Code BJ3601389
This standard specifies the classification and code of controlled atmospheres used in heat treatment, and is applicable to controlled atmospheres used in chemical heat treatments such as carbonisation and carbon fusion and heat preservation.
2 Definitions
This standard adopts the following definitions.
2.1 Exothermic gas purification
Dehydrate the exothermic atmosphere of the glycosides and remove carbon dioxide to make the leather atmosphere: or add a certain proportion of water vapor to the exothermic gas in the passage, and under the catalytic effect, convert the oxide in the gas into carbon dioxide, and then dehydrate and generate carbon dioxide to make the leather atmosphere.
2.2 Exothermic gas-endothermic atmosphere
Mix the raw material gas [natural gas, alkanes, butane, etc.] with air in a certain proportion, and after nearly complete combustion, the combustion products are mixed with less raw gas, and under the action of the catalyst, the main stimulant is used to complete the chemical reaction by igniting the heat to produce the gas. 1. Liquid bag decomposition
Organic liquid (alcohol, kerosene, etc.) is directly added to the hot oil for cracking, or falls into the decomposition furnace for catalytic cracking to generate gas.
2.4 Hydrogen preparation gas
Use ammonia as raw gas through partial combustion or thermal decomposition under the action of catalyst to produce oxygen, 2111
Combustion gas
Use oxygen as raw gas and mix it with a certain proportion of air, and produce an atmosphere through partial combustion, 2.4.2 Decomposition gas
Use oxygen as raw gas and mix it with a certain proportion of air, and produce an atmosphere through thermal decomposition under the action of a catalytic agent. 2.5 Charcoal to prepare gas atmosphere
A certain amount of air is passed through the burning charcoal to prepare atmosphere: 3 Classification
The atmosphere used for heat treatment can be divided into the following eight categories according to its preparation method: Category 1 Exothermic atmosphere:
Category 2 Endothermic atmosphere:
Category 3 Micro-heat endothermic atmosphere:
Approved by the State Administration of Machinery Industry on 1999-06-24 and implemented on 2000-01-01
Category 4
Organic liquid plasticizer
Category 5 Chlorine-based atmosphere
Category 6 Ammonia preparation atmosphere;
Category 7 Wood fuel preparation gas cylinder;
Category 1 Hydrogen.
JB:T 9209-1999Www.bzxZ.net
The gas code is composed of the basic code of gas type, the series code of the whole component and part of the gas preparation code, x
Atmosphere preparation method code (see Table 3)
Gas component (CO, CO: H,, series code! Double Table 2) Gas type basic code (see Table 1)
4.1 Gas oxygen agent code
The first pinyin of the gas name is capitalized, see table! Table 1 Basic code of atmosphere type
Gas name
Heat-activated gas cylinder
Endothermic oxygen
Hot-pressed thermal oxygen
Purified oxygen
Endothermic oxygen
Organic liquid decomposition gas
Basic gases
Nitrogen Various gas pumps
Final category
4.2 Basic component series code of gas type
Smoke decomposition gas
Ammonia combustion gas fluorine
The basic component series code of atmosphere is expressed by Arabic numerals, see Table 2. FQ
Basic code
COCO,—H--N,
co-I,-N
4.3 Gas preparation method code
JB/T 9208—1999
Table? Gas basic component series code
Production method code ratio, pull-up number is shown, see Table 3 Gas preparation room code
Preparation method
External preparation
In-furnace preparation
Controlled atmosphere classification code example
Ordinary exothermic gas production, the gas is basically divided into CO-CO-II-V, the gas preparation method is prepared outside the furnace, the guide is PFQ10
Controlled gas classification and code summary table
Controlled gas group classification and code and typical gas basic components, use summary see Table 4 Table 4 Controllable atmosphere classification code summary table
Ordinary exothermic gas production
Decomposition gas oxygen
Purification exothermic gas production
Endothermic gas oxygen
Heat absorption gas oxygen|| tt||Present anti-vitrified cracking gas
This component
CO.-CO,—,N
CO-H,—H,
Generally used
Judgment of light width: Powder metallurgical terminal:
Carbon steel core wide annealing, normalizing, annealing
Reporting low light shell delayed annealing, carbon machine
Stanley carbon smooth annealing: annealing , tempering
stainless steel pot, and chrome steel light bullet fire: powder metallurgy
penetration energy, complex embedding, carbon paint, north
fire, comfortable baking, high air supply fire
press charcoal, just in time, marry spots and swim together, light light resignation Li children, breaking wind soldiers,
number of protection heating
gas east name
N--H system to
N,—CTI Series
CH-0 two series
NHH series
digital record gas group
injection gasifier
this release new gas series
JB/T9288-1999
Table 4 (end)
pot public to
CO-H:-N:
H,—N
COCO.-II,-N;
stage investment
low press feed complete retreat request, fire relief, same request;
return: energy device
in carbon read light grams, pull
carbon, carbon this total Specification,
stock preservation heating
needle, age treatment, full sintering, remove intermetallic reduction; stainless steel, 1 special annealing
raw steel light return element: stainless steel heat treatment:
needle preservation, relative end treatment full standard
steel, low except you, produce sodium annealing point,
middle and high light side pressing request, front flame, can fire
chuan feed iron annealing day, tour talk
jiang magnetic steel light source annealing
stainless steel, low contribution creation, electric creation has
metal research: machine rise enterprise sintering: melt metal
wax: stainless can be close
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