This standard specifies the product classification, technical requirements, test methods, inspection rules, packaging and marking of reduced iron powder for powder metallurgy. This standard applies to iron powder produced by reduction method for powder metallurgy materials and products. GB/T 4136-1994 Reduced iron powder for powder metallurgy GB/T4136-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Keduced iron pawders for powder metallurgy
Keduced iron pawders for powder metallurgy1Subject content and scope of application
CB/T 4136 94
Replaces 413684
This standard specifies the product classification, technical requirements, test methods, inspection rules, packaging and marking of reduced iron pawders for powder metallurgy. This standard applies to iron powder produced by reduction method for powder metallurgy materials and products. 2 Reference standards GB223.5 Chemical analysis methods for steel and alloys - Determination of silicon content by flake acid-ferrous sulfate potassium silicon blue photometric method GB223.7 Determination of iron content in alloys and iron powders: Titanium dinitride-potassium dichromate volumetric method GB223.34 Chemical analysis methods for steel and alloys - Determination of hydrochloric acid residues in iron powders GB223.59 Chemical analysis methods for steel and alloys - Determination of phosphorus content by antimony, phosphine and molybdenum blue photometric method Chemical analysis methods for steel and gold - Determination of manganese content by sodium (potassium) periodate photometric method GB 223.63 (B 223.68) GR 223. 69
Methods for chemical analysis of iron, steel and alloys - Combustion-potassium carbonate volumetric method for determination of sulfur content - Combustion gas volumetric method for determination of carbon content GB1479 - Determination of bulk density of metal powders - Part 1: Funnel method GB1480
GB1481
GR1482
GB5158
Determination of particle size composition of metal powders - Dry sieving method - Determination of the compressibility of metal powders (excluding powders for cemented carbide) in uniaxial pressing - Determination of the flowability of metal powders - Standard funnel method (Frost rheometer) - Determination of the weight loss of metal powders during reduction in hydrogen (hydrogen loss) GB531 4
Sampling method for powder metallurgy
GB11106Method for determining the strength of metal powder by compression without round crushing3Product classification
3.1Iron powder products are divided into five grades according to the use requirements: FHY80-23, FHY80·25, FHY100-25, FHY100·27 and FHY200.
3.2Product grade indication method
Approved by the State Administration of Technical Supervision on September 26, 1994 and implemented on June 1, 1995
Example:
3.3Application of each grade of iron powder
GB/T 413694
FHY80·23 is mainly used for low and medium density materials and products. FIIY80·25 is mainly used for medium density materials and products. FIIY100·25 is mainly used for medium and high density materials and products. FIIY100·27 is mainly used for high density materials and products. FIIY200 is used for other materials and products.
4 Technical requirements
4.1 The chemical analysis of iron powder products shall comply with the provisions of Table 1. Grade
FHY g ·23
FIIY 80- 25
FHY 100 ·25
FHY 100 ·27
FHYZ0O
Not less than
times of the product's bulk density
Separation dot
Product reverse sieve weight
Reduced iron powder for powder metallurgy
Chemical analysis, %
Frame quality, not more than
Note, the acid-insoluble matter content of iron powder made from white iron concentrate powder can be agreed upon by both the supplier and the buyer. 4.2 The appearance of the powder should be silver-gray, and no oxidation rust should appear on its surface, and no foreign inclusions should be mixed in the powder.
4.3 When observed with a metallographic microscope, the particle shape of the iron powder should be irregular and shrunken. 4.4 The physical and technical properties of iron powder products shall comply with those specified in Table 2. P
Hydrochloric acid insoluble matter
FHY BU - 23
FHY 80 + 2F
FHY 100 - 25
FHY 10G·27
FIIY200bZxz.net
Bulk density
2.20-2.45
2. 45--2. 70
2. 41--2. 60
2. 60~2. 80
2. 00~-2. 80
Flowability
Not more than
GB/T 4136 - 94
Shrinkage
Not less than
Sieve analysis.%
>250μm>180gm150gm275μm
(+60 mesh) (+80 mouth) (+100 days-200 months)0
Company, except for FHY200 brand, the remaining brands of iron powder should be 40%60% of the powder size of 7:pm-200 days. 4.5 If the buyer has other special requirements for the performance of iron powder products, the supply and demand parties can negotiate: 5 Test method
325)
5 ~ 25
5.1 Chemical analysis
The content of total iron, manganese, silicon, carbon, sulfur, phosphorus, hydrochloric acid insoluble matter and oxygen loss value in reduced iron powder shall be determined according to CB223.5, (GB223.7, GB223.34. GB223.J9, GB223.63. GB223.68. G5158 respectively. 5.2 Determination of physical and technological properties
The determination of bulk density, fluidity and compressibility of reduced iron powder and sieve analysis shall be carried out according to GB1479, GB148, GB1481 and GB1482 respectively. When determining the compressibility of iron powder, 1% zinc stearate is added, and the unit pressure during forming is 500MPa. If the formability of iron powder needs to be determined, GB1116 can be used for testing. 5.3 Particle morphology inspection
Use a metallographic microscope to inspect the morphology of iron powder particles. 6 Inspection rules
6.1 The reduced iron powder shall be inspected and accepted by the supplier's technical supervision department to ensure that the product quality meets the requirements of the standard and fill in the quality certificate. 6.2 Iron powder products should be submitted for inspection in batches; each batch of products of the same brand must be mixed and batched, and the batch weight shall not be less than 3000kg. 6.3 The purchaser may treat the iron powder products received according to the provisions of this standard If the inspection result does not conform to the provisions of this standard, the supplier shall raise the issue within one month after receiving the product and the supplier and buyer shall negotiate to resolve the issue. If arbitration is required, the supplier and buyer shall jointly sample and verify the received products at the buyer's side. If the inspection result is unqualified due to poor management by the buyer, the buyer shall be responsible. 6.4 The sampling method for spot-checked products shall be in accordance with GB5314. 6.5 If the inspection result of a batch of iron powder does not conform to the provisions of this standard, double the number of samples shall be taken from the batch of iron powder in accordance with the provisions of Article 6.1, and the relevant items shall be re-inspected.
7 Packaging and marking||tt ||7.1 Iron powder products should be tightly packed in clean, moisture-proof and non-breakable packaging containers (plastic bags with nylon woven bags, plastic bags, etc.), usually with a net weight of 25kB. Other packaging methods can also be agreed upon by the supply and demand parties. 7.2 The packaging container should be marked with a semi-national mark indicating: product name, brand, net weight and supplier name, etc., and printed with the words "moisture-proof" and "GB".
7.3 Each batch of products should be accompanied by a quality certificate, which should indicate: a. Supplier name:
b. Product name;
Product brand, batch number, batch weight and number of pieces; GB/T 413694
All inspection results and technical supervision department stamps: d.
Inspection date and factory date:
This standard number.
Additional instructions:
This standard is issued by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information Standards Research Institute of the Ministry of Metallurgical Industry. This standard was drafted by the Liwu Steel Powder Metallurgical Company of the Iron and Steel Research Institute of the Ministry of Metallurgical Industry. The seven drafters of this standard are Yu Ranting, Huang Tengzheng, Li Senrong, Li Zhongquan, Zhou Jinghong, Tian Shuyan, and Sun Chao. The level mark of this standard is GB/T4136-94Y
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