JB/T 9226-1999 Coatings for sand casting

JB/T 9226-1999 JB/T 9226-1999 Coatings for sand casting JB/T9226-1999 Standard download decompression password: www.bzxz.net

When JB/T92261999
was revised, the original standard was edited. The main technical content of this standard is the revision of ZBJ31008-90 "Coatings for Sand Casting". 1 The technical content has not changed.
This standard replaces ZBJ31008-90 from the date of implementation. Appendix A of this standard is a reminder appendix.
This standard is proposed and managed by the National Foundry Standardization Technical Committee. The drafting unit of this standard: Shenyang Foundry Research Institute. Drafters of this standard: Shang Shuzhen, Luo Yuansheng 584
1 Scope
Machinery Industry Standard of the People's Republic of China
Coatings for sand casting
JB/T9226.. 1999
Replaces ZB J31 008--99
This standard specifies the classification method, technical conditions, inspection rules, packaging and transportation of sand mold and sand core coatings. This standard is applicable to paste and powder coatings diluted with water or organic solvents for sand casting. After dilution, the coatings are used to coat sand molds or sand cores. 2 Referenced standards
The provisions contained in the following standards constitute 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, and parties using this standard should explore the possibility of using the latest versions of the following standards. JB/T5107---1991 Test method for coatings for sand casting JB/T92231999 Zirconium sand for casting
YB/T5142--1993 General provisions for packaging, marking and quality instructions for metallurgical mineral products 3 Terms, codes, and brands
3.1 Terms
3.1.1 Density
The ratio of the mass of the coating to its volume, expressed in (g/cm\). 3.1.2 Conditional viscosity
Under specific conditions, the degree to which the liquid molecules and solid particles of the coating hinder the relative flow of the coating, expressed in time (s). 3.1.3 Suspension
The ability of the coating to resist the delamination and precipitation of solid refractory powder, expressed in suspension rate (%). 3.1.4 Coating wear resistance
The ability of the coating to resist scratching and shaking wear, expressed in wear weight (g). 3.1.5 Paste
Undiluted paste coating.
3.1.6 Powder
Powder coating without solvent.
3. 2. 1 Solvent code: S---water-based; Y--organic solvent
3.2.2 Coating physical state code: G-paste; F-powder. 3.2.3 Paint code. SM-graphite powder; H-talcum powder, JS-refined quartz sand GI. Wang powder. Zircon powder, M magnesium sand powder; MG forsterite powder Q-others 3.3 Brands
3.3.1 The compilation of paint brands is mainly composed of Chinese phonetic letters, and the representation method is as follows: Approved by the State Machinery Industry Bureau on 1999-06-24 High aluminum vanadium powder: Z
Implementation on 2000-01-01
JB/T 9226
Brand examples: Water-based paste zircon powder paint: SG-GY Solvent-based powdered graphite powder paint: YF-SM4 Classification and grading
4.1 According to different refractory materials, paints are divided into nine categories, as specified in Table 1. Table 1
Refractory powder
Graphite powder
Talc powder
Refined quartz powder
High alumina vanadium powder
Refractory powder code
Physical state code
-Solvent code
Brown corundum powder
According to the different dilution solvents, the coatings are divided into two categories: water-based coatings and organic solvent coatings. 4.3
According to the physical state, the coatings are divided into two types: kidney materials and powders. 4.4
Zircon powder
Magnesium sand powder
According to the suspension and coating wear resistance of the coating when diluted to the use state, the coatings are divided into two grades according to the provisions of Table 2. Table 2
5 Technical requirements
5.1 Visual inspection of the coating shall not have visible impurities. Water-based
≥90～95
Suspension rate
Organic solvent
≥85~90
5.2 The performance indicators of the coating should meet the technical requirements specified in Table 3 and Table 4. 5.3 The coating should be stirred evenly before use.
Diluted paint density
Diluted paint conditions
SG-SM-1
SG-SM-2
Performance index of water-based paint
Forsterite powder
Coating wear resistance
g(64r)
≥0.50~-1.00
1.28~1.35/1.10~1.80|1.35~1.45|1.60~1.80/1.50~1.80|1.80-2.401.80~2.401.50~-1. 801.50~~1.80Viscosity ($6mm flow cup)
10~~15
15～20
Floating density of coating after 6h of dilution (%)
Fluid leather
10～15
10~～~15
15~-20
Coating wear resistance
g(64r)
Appearance of coating after coating, drying and cooling
SG-SM-1
SG-SM-2
JB/T 9226
—1999
Table 3 (end)
0.40~1.00|0.20~0.700.401.000.20~0.70|0.20~0.70/0.200.700.20-0.700.40-1.000.:0--1.00Uniform coating without impurities and cracks
Table 4 Performance index of organic solvent coating Standard
Brand YG-SM-1
Diluted paint density
Diluted paint conditions
YG-SM-2
1.18~1.251.20~1.601.25~1.351.40~1.601.40~-1.601.60~2.20|1.60~~2.201.40~ 1.601.101.66Viscosity (6mm flow cup)
Suspension rate of coating after 2h of dilution (%)
Gas generation
Coating wear resistance
g(64r)
Appearance of coating after coating, drying and cooling
6Inspection rules
6～12
6～12
6 ~～12
0.401.000.20~~0.700.40~1.000.20~0.70|0.20~0.70l0.20-~0.70/0.20~0.700.40--1.000.40Uniform coating without impurities and cracks
6.1Pastes and powders shall be inspected by batches, and the number of products of the same brand submitted at the same time shall be regarded as a batch. 6.2Inspection shall be in accordance with the provisions of 5.1 and 5.2. Sampling and test methods shall be in accordance with the provisions of JB/T5107. .00
6.3Each batch of pastes and powders supplied by the supplier shall be inspected in accordance with the technical requirements specified in this standard, and the inspection results and the quality certificate shall be submitted to the brand guide. Other requirements beyond the provisions of this standard shall be determined by negotiation between the supplier and the buyer. 6.4 The purchaser may conduct quality acceptance according to the provisions of this standard. If any of the indicators in the inspection results do not meet the requirements of this standard, the same batch of products shall be doubled for re-inspection. 6.5 If the re-inspection results do not meet the requirements, the supplier and the purchaser shall negotiate to resolve or entrust the tailoring unit to make a decision. The tailoring unit shall be selected by negotiation between the two parties. 7. Marking, packaging, transportation and purchase and storage
7.1 The paste shall be packaged in a plastic barrel or metal barrel (a packaging bag lined with polyethylene film). After loading, the barrel shall be sealed. 7.2 Powder coatings such as graphite powder shall be packaged in a polypropylene woven bag with an inner layer of polyethylene film. After bagging, the bag door shall be sealed. 7.3 The packaging marking of water-based and alcohol-based powder coatings of zircon powder shall be carried out in accordance with the provisions of YB/T5112. 7.4 The transportation and storage of zircon paste and powder shall be carried out in accordance with the provisions of JB/T9223. 7.5 The packaging container should be marked with the manufacturer's name, product name, brand, batch number, production date, net weight, etc., and a quality certificate should be attached. 7.6 During transportation and storage, it should be prevented from moisture and deterioration. The storage temperature of organic solvent paste coatings should not exceed 45 (, and it is strictly forbidden to be close to fire sources.
7.7 Storage warranty period is 6 months for paste and 12 months for powder from the date of manufacture. 587
SG-SM-1
SG-SM-2
YG-SM-2
JB/T 9226--1999wwW.bzxz.Net
Appendix A
(Suggestive Appendix)
Recommended application scope of coating for sand castingYG-SM-1
Application scope
Sand molds and sand cores for small and medium-sized iron castings
Sand molds and sand cores for large and medium-sized iron castings
Sand molds and sand cores for non-ferrous metal castings
Sand molds and sand cores for small and medium-sized carbon steel castings, large and medium-sized iron castingsSand and sand cores for carbon steel and alloy steel castings, large iron castingsSand and sand cores for manganese steel castings
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