Standard for silicon - barium alloys GB / T15710-1995
Silicon-barium alloys are ferroalloys with higher activity. The addition of steel and steel can reduce the occurrence of smoke and flame, change the nature and distribution of non-metallic inclusions in steel, improve the machinability of metal, for casting production, show good resistance to decay and reduce the sensitivity of the section Is a cast iron production in a long-term, efficient inoculant. The use of Silicon Barium alloy, compared with the use of pure aluminum, ferrosilicon, silicon calcium and other single alloy effect better and more economical. Silicon Barium alloy for ferroalloy production is also very favorable. Silicon Barium alloy widely used, the development of this standard is to seek unity, regulate the market, promote technological progress, to meet the production and use needs.
This standard specifies the technical requirements, test methods, inspection rules, packaging, storage and transportation, marking and quality certificates of silicon and barium alloys.
This standard applies to steel-making as deoxidizer, desulfurization agent and casting inoculant of silicon-barium alloy.
2 reference standard
The following standards contain provisions which, by reference in this standard, constitute provisions of this standard. At the time of publication of this standard, the versions shown are valid.
All standards will be revised and the use of the standard parties should explore the possibility of using the latest version of the following standards.
GB / T 3650-1995 General requirements for acceptance, packing, storage, marking and quality certificates for ferroalloys
GB / T 40l0 - 1994 Iron alloy chemical analysis of the sample to take and preparation
3 technical requirements
3.1 grades and chemical composition
3.1.1 silicon barium alloy barium, silicon content is different, divided into seven grades, the chemical composition should be consistent with the provisions of Table 1
Table 1 Chemical composition
|Grade||Chemical Composition %|
|≥ Min||≤ Max|
Note: Ba, Si is the necessary element.
3.1.2 demand side of the chemical composition of the special requirements, agreed by the supply and demand sides
3.2 Physical state
3.2.1 particle size
Silicon barium alloy delivery particle size of 10mm - 100mm, of which less than 10mm of not more than 8% of the total; greater than 100mm of the total shall not exceed 5%.
3.2.2 demand side of the grain size has special requirements, both agreed by the supply and demand.
3.2.3 product surface clean, there should be no obvious non-metallic inclusions.
4 test method
4.1 sampling, sample preparation
The measurement and preparation of samples for silicon barium alloy analysis shall be carried out according to the requirements of silicon and calcium alloy in CB / T 4010.
4.2 Chemical analysis
The method of chemical analysis of silicon barium alloy is determined by consultation between supply and demand.
5 acceptance rules
5.1 The quality inspection and acceptance of the product shall be carried out by the technical supervision department of the supplier. The demand side shall have the right to re-check the product quality according to the regulations. If there is any objection,
Within 10 days after arrival.
The same grade of products classified as a batch of delivery, the same batch of products in the range of fluctuations in barium content of not more than 2%.
6 Packaging, storage and transportation, signs and quality certificates
Silicon barium alloy products are packed in bags or drums, must be covered with moisture-proof bags, each net weight 50kg.
6.2 storage and transportation
Products should be stored in the Treasury, and pay attention to ventilation and moisture, shipped with a caravan. Do not seepage and mix with other debris
6.3 logo and quality certificate
The product logo and quality certificate shall comply with the requirements of GB / T 3650.