GB/T 5682-1995 Ferroboron

This standard specifies the technical requirements, test methods, inspection rules, packaging, storage, transportation, marking and quality certificate for ferroboron delivery. This standard is applicable to ferroboron used as a boron additive for steelmaking, casting and for amorphous, ultra-fine crystal master alloys, NdFeB alloys and other purposes. GB/T 5682-1995 Ferroboron GB/T5682-1995 Standard download decompression password: www.bzxz.net

GB/T56821995
The original national standard ferroboron is only suitable for steelmaking, cast iron and other purposes as a boron core additive. The regulations of some grades and impurity elements in the standard cannot adapt to the new technology requirements that have developed rapidly in recent years, and cannot meet the needs of ferroboron for new alloy materials (such as amorphous alloys and iron-boron permanent magnet materials). After the ferroboron smelting process, ferroboron is produced by electric carbon thermal method, and cheap and easily available carbonaceous reducing agents are used to replace precious non-ferrous metals such as aluminum and magnesium. Practice has proved that the product is dense, has small segregation and stable quality. This standard has made the following modifications to the original standard: adding two grades, FeB20C0.5 and FeB18C0.5, and canceling the FeB7C2.5 grade in the original standard. The parameters of the tabulated elements in the original standard have been adjusted. The physical state of the original standard has been greatly modified. This standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information Standards Institute of the Ministry of Metallurgical Industry. This standard was drafted by Liaoyang Ferroalloy Plant and Shanghai Zhongjia Ferroalloy Co., Ltd. The main drafters of this standard are Zhang Fumei, Zu Guowen, Niu Chengfu and Chen Hua. This standard was first issued in December 1985, revised for the first time in November 1987 and revised for the second time in September 1994. 1 Scope
National Standard of the People's Republic of China
Ferroboron
GB/T5682—1995
Replaces GB 56828?
This standard specifies the technical requirements, test methods, inspection rules, packaging, storage, transportation, marking and quality certificate for ferroboron delivery. This standard is applicable to ferroboron used as a boron additive for steelmaking, casting and for amorphous, ultrafine master alloys, sensitive iron-boron alloys and other purposes.
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 the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T40101994 Sample collection and preparation for chemical analysis of ferroalloys GB/I:132 4791 Sampling and testing methods for particle size of ferroalloy products GB3G53-&3 Ferroboron chemistry and analysis methods GB/T3650-1995 General provisions for acceptance, packaging, storage, transportation, marking and quality certificates of ferroalloys. 3 Technical requirements
3.1 Grades and chemical composition
3.1.1 Ferroboron is divided into nine grades according to the content of ferrite, carbon and impurities. Its chemical composition shall comply with the provisions of Table 1. Table 1 Chemical composition
Chemical composition, %
FeE23C0.05
FeB22CO.1
FeR13t:0.1
20.0~25.0
39. 0 ~25. 0
14.0~19.0
State Technical Supervision Bureau approved C on October 10, 1995, not more than
19960301 implementation
FeB20Co.5
FeB18C0.5
FeB16C1.0
FcB14C1.0
FeB12C1.0
19. 0~21. 0
GB/T 5682-1995bzxZ.net
Continued Table 1
Chemical composition, is
17. ~≤19. 0
15,. 0~-17, 0
13. 0~-≤15. 0
9,~13,0
Not more than
Note: The listed elements B, Al, are the required elements. Other elements are the required elements for guarantee: When used as amorphous and ultra-fine crystal alloy materials, they are all required elements. 3.1.2 If the purchaser has special requirements for chemical composition, the supply and demand parties shall negotiate separately. 3.2 Physical state
3.2.1 Ferroboron shall be delivered in block form, with a block size of 5mm~100mm. The sum of the number of blocks larger than 100mm and smaller than 5mm shall not exceed 10% of the total weight of the batch.
3.2.2 There shall be no non-metallic inclusions on the surface and cross section of the ferroboron block. 3.2.3 If the purchaser has special requirements for physical state, the supply and demand parties shall negotiate separately. 4 Test methods
4.1 Sampling
The sampling and preparation of samples for chemical analysis shall be carried out in accordance with GB/T 4010. 4.2 Chemical analysis
The chemical analysis method shall be carried out in accordance with GB3653. 4.3 Particle size detection
The particle size detection method of iron shall be carried out in accordance with GB3/T13247. 5 Inspection rules
5.1 Quality inspection and acceptance
The quality inspection and acceptance of products shall comply with the requirements of (GB/T3650. 5.2 Batch
Products can be delivered in batches by furnace or brand. When delivered by furnace, the difference between the highest or lowest content of Li in low-carbon products and the average boron content of the sample shall not exceed 2%, and the difference between the highest or lowest content of Li in medium-carbon products and the average boron content of the sample shall not exceed 2%; the difference between the average boron content of products delivered in batches between furnaces shall not exceed 2%. 6 Packaging, storage, transportation, marking and quality certificate 6.1 Packaging
GB/T5682-1995
Products are packed in iron drums with a net weight of 50kg per drum. If the buyer has special requirements for packaging, the supply and demand parties shall agree separately. 6.2 Nuoyun
The packaged products should be stored in the warehouse, and a covered wagon should be used for shipment. If stored in the open air or shipped by open wagon, they must be covered with a bitter cloth to prevent water seepage or mixing of debris into the package. Mixed batches and numbers are not allowed during the wrong transportation process. 6.3 Chengzhi
The product package should be painted with obvious signs, and the package should be attached with a finished product label. The content of the signs and labels should comply with the requirements of GB/T3650.
6.4 Quality Certificate
At the same time as delivery, the supplier should issue a product quality certificate, and the content of the certificate should comply with the requirements of GB/T3650.
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