Some standard content:
IC'S 25.200
Machinery Industry Standard of the People's Republic of China
JB/T9203-1999
Solid carburizer
1999-06-24 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
[R/T9203-1999
This standard is a revision of 2BJ36008-88 Solid Carburizer. During the revision, the original standard was modified in accordance with relevant regulations, and the main technical content remained unchanged.
This standard replaces ZBJ360088B from the date of implementation. Appendix A, Appendix B, Appendix C, Appendix D, Appendix II, and Appendix F of this standard are all appendices of the standard. This standard is proposed and managed by the National Heat Treatment Standardization Technical Committee. The responsible drafting unit of this standard is China First Tractor Group Co., Ltd. The responsible drafters of this standard are Zheng Dasheng and Zhang Shidi. This standard was first issued on July 12, 1988. 1 Scope
Machinery Industry Standard of the People's Republic of China
Solid carburizing agent
Sold carburizrr
JB/T9203—1999
ZB13600888
This standard specifies the technical requirements, analysis methods, inspection rules, packaging, transportation, distribution and marking of solid carburizing agent. This standard is applicable to solid carburizing agent used for decarburization of low carbon steel and low carbon alloy steel. 2 Referenced standards
The provisions contained in the following standards will become the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards. G month TA3—1988
G/T652—1988
GE/T 670—1986
GB/T 1272-1988
GB/T 1397—1995
GBT 1428—1978
HG275—1996
HG/l3-976—1981
3 Technical requirements
Chemical reagent test method Preparation of preparations and products used Chemical reagents Aldehyde
Chemical reagents Aldehyde
Chemical reagents Water
Chemical reagents Sodium sulfate
Chemical reagents Anhydrous sodium carbonate
Chemical reagents
Chromic acid
Chemical reagents||tt ||Potassium permanganate
Chemical reagents chlorinated sodium
Chemical reagents silver nitrate
Chemical reagents potassium iodide
Chemical reagents potassium iodide
Moisture content of carbon materials
Chemical reagents soluble starch
Chemical reagents ammonium oxalate
3.1 Carburizing agent is a mixture of wood (or other reagents), carbonate (or other catalysts), carbon contact calcium (filler) and appropriate amount of raw materials, and the carbonate content is uniformly covered on the surface of the carbon particles. 3.2 The carbonate content and type of the carburizing agent are as specified in Table 1, and the carbonate content of the solid carburizing agent
Carbon content maximum specification
Approved by Beijing Machinery Industry Bureau on June 24, 19991
> 7-12
>12-17
2000-01-01 implementation
-JR/T92031999
3.3 The particle size or group of solid carbon filter shall be determined according to Table 2. Table 2 Solid carburizing particle size
Special
Particle size
Special: Special circumstances According to the agreement between the supply and demand parties, the particle size is not within the range of the table>6.0-9.0
3.4 The content of the specified particle size in the solid carbon filter shall not be less than 92%, and the content of the specified particle size shall not be more than 2%. 3.5 The content of calcium carbonate in the solid carbon filter shall not be more than 2%, which can be cancelled according to the agreement between the supply and demand parties. 3.6
The impurity content in the solid carbon filter shall meet the requirements of Table 3. Table 3 Impurity content in solid carbon additives Note: The listed contents should be converted to anhydrous carbon additives. 3.7 Example of using Gs
marking:
× as product marking:
Use Arabic numerals to indicate the number group
The letter G indicates the carbon dioxide content category, and S indicates the solid carbon additive content. Example: Solid carbon additive with carbon dioxide content greater than 2%~17%, size greater than 1.5-3mm is marked as: GS--2
> 9.0-12.0
3.8 During production and use of solid carbon additives, the dust content should be less than 10 μg/m3. The concentration of carbon dioxide should be less than 0.5 agm.
4. Analytical methods
4.1 The determination of acid content shall be in accordance with Appendix A (Appendix to the standard). The determination of calcium carbonate content shall be in accordance with Appendix B (Appendix to the standard). 4.1
4. The determination of water content shall be in accordance with GB/T1428. The determination of content shall be in accordance with the provisions of the standard (Appendix to the standard). 4.4
The determination of silicon dioxide content shall be in accordance with the provisions of Appendix B (Appendix to the standard). 5
The determination of volatile content shall be in accordance with Appendix E (Appendix of the standard, JB/T9203-1999
4. The determination of the content of carburizing agent shall be in accordance with Appendix F (Appendix of the standard sieve): Inspection schedule
5.1 When sampling, samples shall be taken at the center line of the packing (barrel). The total content of carburizing agent shall not be less than 25.1 Sampling quantity: 10% of each batch shall be sampled, and no less than 3 packaging units shall be taken. 5.3 When the sampling fails, the product shall be re-tested twice. If there are still unqualified samples, it can be determined that the batch of products will not be qualified. 6 Packaging, transportation, storage and marking
6.1 The carburizing agent must be packed in bags (barrels) and should be equipped with moisture-proof facilities. Each bag (barrel) of carburizing agent weighs no less than 20kg. 6.1 During transportation, the filter carbon system should be ensured not to be damp or damaged. 6.3 Carburizing agent should be stored in a ventilated and dry warehouse. 6.4 The surface of the carburizing agent bag (" should be marked with the product name, registered trademark, specifications, product, production unit, production date and moisture-proof symbol, and the product certificate in the package. The instrument is a general laboratory instrument. A2 Reagents JB/T9203-1999 Appendix A [Standardized method for determination of carbonic acid content] Hydrochloric acid (GB/T622), analytical grade, 1:1 dilution: b) Effective water (GB/T631, analytical grade, 1:1 dilution: e1 1% valence indicator solution, prepared according to the provisions of GB/T03; 6) Potassium dichromate (GBT642), analytical grade, 0.1% ol: e1 Thiosulfate solution Sodium hydroxide (GB/T637), externally purified, 0.1mol/L: 4mol/L; sodium hydroxide (GB/T637), purified, 0.1mol/L: 4mol/L; sodium hydroxide (GB/T637), purified, 0.5% soluble; potassium hydroxide (GDT1272), purified, 43% soluble; take about 25g of the ground sample, the error is about 0.0003g, add 50mL (503) of 50mL hydrochloric acid, put it in a glass flask, heat for 3-4min until the carbon dioxide is discharged, then filter the gas with precipitate, rinse the residue on the filter paper with water 34 times, add 15.-2mL of water next time, collect the filtrate and the rinsed solution in a 250mL volumetric flask, add water to make the surface of the sample reach the mark Mix the mixture and transfer the filtrate to a 250m3 flask with a pipette. Add 5ml of potassium hydroxide solution and add 10ml of water until the flask turns red. Add 40ml of potassium carbonate solution and add 5.10ml of water to filter the contents of the flask into a 350m3 flask. Rinse the filter paper 2-3 times, adding 15.2ml of water each time to the filter surface and record the volume and mix well. The liquid must be kept at a constant volume to determine the volume: take 1ml of water and transfer it to a 1000m3 flask with a pipette. Add 5ml of potassium hydroxide and 15ml of potassium hydroxide to the flask. Use a pipette to tighten the flask, add the contents of the flask to the flask for 5-10 minutes, then add water to increase the volume of the flask to 10n-510m[., and then add the powder to the liquid and then use sodium sulfate to determine the concentration until the blue liquid turns into a light color.
24 Result calculation
Calcium carbonate energy content () is calculated according to (A1): 005900
m(100-X)
Where: m-weighed mass of carburizing agent, g; 40-volume of potassium carbonate solution, mL: V-volume of potassium carbonate solution, mL: 2.5...-Calculate 1 as the conversion factor for liquid dilution:: AI
JB/T9203-1999
Equivalent to! mL of carburizing agent dissolved in potassium carbonate is: X water content in carburizing agent, %.
The second mean of the results of two parallel determinations is the result of analysis. The deviation between the two parallel determination results shall not be greater than 3%. Appendix B
(Standard Appendix)
Determination of calcium carbonate content
B1 Instruments and reagents only
B1.1 Instruments only are experimental instruments:
R1.2 Reagents
) Ammonium oxalate [HGT-96), analytical grade, saturated and liquid: h) Manganese dioxide (GB/T670, analytical grade, 0.04% purity, c) Potassium permanganate (GB/T625), analytical grade, 25% purity; d) Potassium permanganate (GB/T643), analytical grade, 0.1 mol/L solution, B2 Analysis Steps
Take 100 mL of the solution prepared according to Appendix A+A3, pipette it into a beaker with a volume of 250 mL, heat it to boiling, add 15~20% of the solution to The boiling point of ammonium oxalate is removed and placed for 2-3 hours. The residue is washed with (50±5] water for 3-4 times, each time with 15-20mL of water, until a clear area is obtained in the water (silver nitrate roll-off test). The residue on the filter paper is diluted. The purification method is to heat the solution to (505°C) and wash it 3 times, each time with 10-15mL of water, and wash it with the same temperature. Wash with steamed stuffing water for 3-4 times, each time with 10 ml of water, and collect the rinse water into a conical flask: Heat the obtained stuffing liquid to 70±5℃, and use potassium manganate to clear it until the light red color disappears. Calculate the percentage of calcium carbonate (calculated according to the formula: 0.005004×6.3.5×100×100
m(100 -.)
Wherein; V is the volume of potassium permanganate solution used for titration, and L is the mass of the diagnostic reagent recommended when determining the silver carbonate content in case A3, more than 0.005004-g is equivalent to 1mL of potassium manganate solution, 6.25g; X is the content of calcium carbonate in the charcoal diluted in case A3, %
Take the arithmetic mean of the results of two parallel determinations as the result of analysis, and the deviation between the results of two parallel determinations shall not exceed 1%. C1 Instrument and test
C1.1 Instrument is a general laboratory dispenser,
C), 2 Reagents
IB/T 9203—1999
Appendix C
(Appendix to the standard)
Method for determination of sulfur content
) Anhydrous sodium carbonate (0B/T639), analytical grade, 0.5% aqueous solution; b) Potassium manganate (GB/T643), analytical grade; c) Hydrochloric acid (AB/T622), analytical grade; d) Chloride (GB/T652), analytical grade, 2% aqueous solution. C2 Analysis Steps
Take 1% sodium carbonate and 10% potassium permanganate [weighing plate error is not more than 0.02"] and place them on the sample, add about [0.0005%] of the filter solvent to make it fine, and put it into a muffle furnace (with a stacking rack) at (0±10) to sinter it into blocks. Take it out of the muffle furnace, cool it in the air for 5-10 minutes, rinse the sintered material in the vacuum sieve with [5±5" of water for 2 times, filter it on a paper filter in batches of 15-20mL, and then wash it with sodium carbonate solution in batches for 2 times, 20ml each time. Collect the washing water to 250ml, add it to the sieve, and then Acidify with hydrochloric acid until a micro-reaction occurs when adding base solution: heat completely, add 50ml. Heat to boiling point, and let stand for 8-10h. The precipitated precipitate is filtered by pressure, washed with water in batches for 3-4 times, 5-20ml each batch, and dried at 105-110%. Then, the filter with slag is dried and placed in a fixed weight plate: then plated in a furnace at (600±10)% to a fixed mass:
When the temperature is reached, under the same conditions, an air test is performed with a reagent of equal magnitude. 3 Calculate the sulfur content (%) using the white content ratio according to the formula (CI calculation: xm-me)x0.1373 ×100 x100
mx(100-x)
In the text: m-
the mass of the carbonized paint weighed out on the spot,:
the mass of the calcined paint in the basic test, the mass of the residual paint in the blank test, the mass of the water in the alcohol agent, %;
0.1373: the conversion point for the mass of the carbonated paint, (c:
the arithmetic mean of the results of the two long-term measurements is taken as the result. The deviation between the two parallel measurement results 0.01% (
DI instrument and test strip
DI.1 General laboratory instrument only.
DI.2 Reagents
JB/T9203-1999
【Standard Record】
Determination of silicon dioxide content
a) Hydrogen phosphate (GB/T622): plate pure 1 dilution: b) Sodium carbonate (GBT639) analytical grade:
c) Silver nitrate (GH/670), analytical grade, 0.! mol/L; leaching; d! Copper phosphate, GBT1397, analytical grade.
D2 Analysis Steps
Put about 22% of carbon powder (the error of measurement is not more than 0.02%) in your arms, carefully add 10mL of screened hydrochloric acid and 50mL of water, cover with a glass cup, and heat for 30-40min (until CO stops releasing). The undissolved residue was removed and washed with 50±5]°C water for 4 times, 10-15 ml for each batch. Then, the residue was put into a sterilizer and dried in an electric oven at [05~110°C for 1 min. The residue was placed in a muffle and calcined at (60010) for 2-3 min. The calcined residue was transferred into a platinum furnace and mixed with equal amounts of sodium carbonate and potassium carbonate (18 g). The weighing error was not more than 0.02 g. The residue was sintered in a muffle (600+0) and placed in the air to cool for 5~10 min. The residue was then poured into 2-mL (50±3]°C water and 3 drops of concentrated hydrochloric acid were added. The solution was transferred into the required temperature III and 2~3 mL of eliminating acid was added. Evaporate on water for 2-3 times, each time with 3-5E of dilute hydrochloric acid.
inch 4-bay dilute hydrochloric acid wet the material, after 30min to dry (5015) water, then into the concentrated. Wash the filter with 70-80 energy water, 1015L each batch, until the nitrogen islands required for washing show negative reaction to silver acid solution, put the paper money traces into a small, dry in a drying cabinet at 105-110℃, and then calcine in a muffle furnace until the weight is stable: the chest sign Wa before use and the calcined rose should be weighed, the error in the scale is not more than 0.00058~D3 The result is calculated by
or silicon dioxide percentage (: direct (DI) calculation: Xm * 100x 100
Wherein: the mass of the carburizing agent, m is the mass of the burnt carburizing agent, B;
X is the water content in the carburizing agent, %
The arithmetic mean value of the carburizing agent is taken from the data card for analysis. The deviation between the results of two parallel determinations shall not be greater than 0.05%. The EI receiver is a general laboratory research instrument.
EZ analysis procedure
JB92031999
Appendix E
(Standard Appendix)
Determination of volatile matter content
Take about 1g of the above carburizing agent and grind it into powder. At the end, the weighing error is less than 0.05B, put it into the muffle furnace, cover it with a lid, and calcine it to a stable weight in advance. Put the muffle furnace on the support 1, so that the distance between the bottom of the muffle furnace and the bottom plate is 10~20mm1. When the muffle furnace is put into the muffle furnace, the temperature drops, and after 3min, the temperature rises to 500.-550℃. If the temperature is not reached within 1min, it should be repeated. After 1min, take the muffle furnace out of the furnace, cool it in compressed air for 5min, then put it in the desiccator and weigh it. B3 Result Calculation
The total amount of the volatile matter (%) is calculated by formula (E1): [m - m.]+ 100
Formula: — Accurately weighed free carbon agent mass, 8; slag mass after calcination. 8:
Carbon detergent water content, %
Take the arithmetic half mean of the two parallel determination results as the analysis result, and the cumulative deviation between the two parallel determination results shall not exceed 0.6%. F1 Night Instrument
JB/T9203-1999
Appendix Fwww.bzxz.net
【Normative Appendix】
Determination of particle size composition
When determining a specified particle size grade, the sieve with the same aperture and lower limit particle size shall be used. F2 measurement step
section 1000 square carburizing agent (weigh until the error is not more than 0.02g), put the bottom of the lung with a coarse aperture on it, and make it sweep the sieve down, with a rated speed of 100 times per 2mm, and then weigh the sieve and raise the dose disk. F3 result calculation
specified particle size percentage () direct formula (F[calculation: m100
where:
- weighed carburizing agent quality, name;
-fine tube network 1 invites magnetic lubrication mother, more,
greater than the specified particle size percentage (X) report formula (above 2) calculate its T
or in:
weighed free carburizing agent original:
mass of carbon filter on the coarse sieve,
small Ding specified particle size percentage! According to (
X=100-Xx
the arithmetic average of the results of two parallel measurements is taken as the analysis result, the deviation between the two parallel measurement results shall not exceed 0.5%,
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