GOST 30756-2001

• gost-30756-2001.pdf (298.41 KiB)
  ГОСТ 30756-2001

GOST 30756−2001 Fluxes for electroslag technologies. General specifications

GOST 30756−2001

Group В05

INTERSTATE STANDARD

FLUXES FOR ELECTROSLAG TECHNOLOGIES

General specifications

Fluxes for electroslag technologies.
General specifications

ISS 25.160.20
OKP 08 2000

Date of introduction 2005−07−01

Preface

1 DEVELOPED by Ukrainian state scientific-research Institute of special alloys and ferro-alloys (Ukrniispetsstal)

2 MADE by the State Committee of standardization, Metrology and certification of Ukraine

3 ACCEPTED by the Interstate Council for standardization, Metrology and certification (Protocol No. 20 of 1 November 2001), was a standards Bureau MGS N 3947

The standard was accepted by voting:

4 by Order of the Federal Agency for technical regulation and Metrology dated December 9, 2004 N 100-St inter-state standard GOST 30756−2001 introduced directly as a national standard of the Russian Federation from July 1, 2005

5 INTRODUCED FOR THE FIRST TIME

1 Scope

This standard applies to fused fluxes used for electroslag technologies (electroslag remelting, casting, chill casting and other processes), as well as for smelting of steel and alloys in electric furnaces designed for the needs of national economy and for export.

2 Normative references

The present standard features references to the following standards:

GOST 12.1.005−88 standards System of labor safety. General hygiene requirements for working zone air

GOST 12.1.007−76 System of standards of occupational safety. Harmful substances. Classification and General safety requirements

GOST 12.3.003−86 System of standards of occupational safety. The work of electric welding. Safety requirements

GOST 2226−88 (ISO 6590−1-83, ISO 7023−83) paper Bags. Specifications

GOST 3306−88 Grid with square cells from steel corrugated wire. Specifications

GOST 3826−82 Grids wire woven with square cells. Specifications

GOST 6613−86 Grids wire woven with square cells. Specifications

GOST 14192−96 Marking of cargo

GOST 15150−69 Machines, instruments and other technical products. Versions for different climatic areas. Categories, conditions of use, storage and transportation of the impact of climatic factors of the external environment

GOST 21639.0−93 Fluxes for electroslag remelting. General requirements for methods of analysis

GOST 21639.1−90 Fluxes for electroslag remelting. Methods for determination of moisture content

GOST 21639.2−93 Fluxes for electroslag remelting. Methods for determination of aluminium oxide

GOST 21639.3−93 Fluxes for electroslag remelting. Methods for determination of calcium oxide and magnesium oxide

GOST 21639.4−93 Fluxes for electroslag remelting. Methods of determining total iron

GOST 21639.5−93 Fluxes for electroslag remelting. Method for the determination of titanium dioxide

GOST 21639.6−93 Fluxes for electroslag remelting. Method of determination of phosphorus

GOST 21639.7−93 Fluxes for electroslag remelting. Methods for determination of calcium fluoride

GOST 21639.8−93 Fluxes for electroslag remelting. Methods for determination of silicon dioxide

GOST 21639.9−93 Fluxes for electroslag remelting. Method for determination of carbon

GOST 21639.10−76 Fluxes for electroslag remelting. Method for the determination of sulfur

GOST 21639.12−87 Fluxes for electroslag remelting. Methods of determining the protoxide of manganese

3 Classification, basic parameters

3.1 Classification

Fluxes for electroslag technologies klassificeret:

An — maritorena or bestride,

ANF — fluoride,

HCV — high-alumina fused,

Videoconferencing — high-alloyed.

3.2 Brand

3.2.1 Fluxes for electroslag technologies manufactures the following brands: ANF-1, ANF-1−1, ANF-1−2, ANF-1−3, ANF-6, ANF-6−1, ANF-6−2, ANF-6−3, ANF-6−4, ANF-6−5, an-291, an-295, ANF-25 and ANF-28, ANF-29, ANF-32, ANF-35, HCV HQs.

3.2.2 Chemical composition of fluxes shall be as given in table 1.


Table 1

Example of designation brand fluoride flux ANF-6−1:

The flux ANF-6−1 GOST 30756−2001

4 General technical requirements

4.1 characteristics of basic performance

4.1.1 Fluxes shall be manufactured in the form of homogeneous granules (pellets).

4.1.2 flux Contamination by the foreign particles (undissolved particles of raw materials, lining, graphite, coke, metal particles, etc.) may be in the range of chemical composition given in table 1.

4.1.3 grain Size of the flux should be in the range of 0.2−20 mm. Quantity of grains smaller than 0.2 mm shall not exceed 15%, and grains larger than 20 mm — 3% by weight of the flux.

4.2 Characteristics agreed by the manufacturer and the customer

4.2.1 Mass fraction of phosphorus in the brands fluxes ANF-6 and ANF-6−1 no more than 0,03%.

4.2.2 Mass fraction of carbon not more than 0.03% brands fluxes ANF-1−1, ANF-1−3, ANF-6−1, ANF-6−3. In this case, a flux is added to make the number «0». Example: ANF-6−1-0.

4.2.3 Mass fraction of titanium oxide is determined by the requirement of the user.

4.2.4 Humidity fluxes should not exceed 3% by weight of a flux, provided that the production technology and is determined by the requirement of the user.

4.3 Marking

4.3.1 For each bag, attach a label or labeling with waterproof paint, containing:

— trademark or name and trademark of manufacturer;

— brand flux;

— weight;

— batch number;

the designation of the present standard;

— manipulation sign «Protect from moisture».

For containers or other packaging attachment of the label or marking is performed by agreement between manufacturer and user.

4.3.2 Transport marking under GOST 14192 with the application of basic, additional, information inscriptions and manipulation sign «Protect from moisture» performed by waterproof paint on the label, securely attached at the door from the inside of the car when a carload shipment. When shipping in a shipping container, each package must have transport labeling.

4.4 Packing

4.4.1 Flux must be Packed in paper bags according to GOST 2226. Net weight of one bag should be from 20 to 50 kg. Weighing should be carried out with an uncertainty of less than 1% of the weight of the bag.

4.4.2 By agreement with the consumer allowed flux packing in special containers or other containers made according to current normative documents, or the shipment of the flux in bulk in covered wagons subject to the securing of the flux and quality during transportation.

4.4.3 Fluxes intended for export, Packed in accordance with the requirements of the contract.

5 safety Requirements

5.1 Work with fluxes in their sorting, packing, transportation, quality control may be accompanied by the release of dust containing manganese, silicon, fluoride. Flux dust refers to chemically hazardous and harmful production factors. In terms of impact on the human body flux dust is toxic, irritating and sensitizing; ways of penetration into the organism through respiratory organs, integuments and mucous membranes.

5.2 For the prevention of occupational diseases, and also to avoid accidents when sorting, packing, transportation, quality control fluxes required to fulfill the requirements of GOST 12.1.005, GOST 12.1.007.

The concentration of harmful substances in air at working with the fluxes must not exceed the maximum permissible concentration (MPC) given in table 2.


Table 2

5.3 Working with the fluxes must be provided with PPE in accordance with standard industry regulations approved in the established order.

5.4 Determination of harmful substances in the air of working zone is carried out in accordance with the guidelines approved by the health Ministries of the CIS States.

5.5 When using fluxes for electroslag technologies should be guided by the requirements of GOST 12.3.003.

6 acceptance Rules

6.1 Fluxes accept parties. The mass of the batch shall not be more than 80 so the Party should consist of a flux of the same brand and be issued a document about quality that contains:

is the trademark or name and trademark of manufacturer;

— brand flux;

— the batch number;

— the weight of the batch;

the chemical analysis results;

— date of manufacture;

— the designation of this standard.

6.2 For the determination of the chemical and granulometric composition from each party of a flux selected a total sample of weight not less than 8 kg made of spot samples. The manufacturer selects a point sample in the packaging process of the products. When Packed in paper bags select one point sample from every tenth bag; when Packed in containers, each container not less than four spot samples, and it is necessary to take composite samples in the filling flux in a container, crossing completely the flow; when the flow of flux into the hopper moving means are selected not less than four spot samples for one hour. The mass of spot samples from 0.05 to 0.30 kg.

Selected overall sample is thoroughly mixed, then cook kvantovanie to mass at least 2 kg, from which after mixing 0.5 kg taken for determination of chemical composition and 1.5 kg for determining grain size distribution.

6.3 Upon receipt of unsatisfactory results on any indicator, it conducted a re-test at twice the sample taken from the same batch. The results of repeated tests are final.

7 control Methods

7.1 the Chemical composition of the flux is determined according to GOST 21639.0, GOST 21639.2−21639.10 GOST, GOST 21639.12. Allowed the use of other standardized methods of analysis, if their metrological characteristics are not inferior to the characteristics of the above standards.

7.2 particle size distribution of fluxes is determined by sieving the sample through a sieve with size of the sides of the cells in the light 20 and 0.2 mm (N 20 according to GOST 3306 or GOST 3826 and N 02 GOST 6613), followed by weighing the residue on a coarse sieve and sifting a small sieve with an error of not more than 0.1%.

The relative amount of grains , %, not corresponding in size, is calculated by the formula

, (1)

where is the mass balance on a large sieve or sifting a small sieve, g;

is the total mass of the sample,

7.3 Homogeneity of the grains and the flux contamination by the foreign particles is controlled by visual inspection of the sample.

7.4 Control of moisture content in the flux is determined according to GOST 21639.1.

8 Transportation and storage

8.1 Flux must be transported in covered vehicles by any vehicle in accordance with the rules of transportation, loading and fastening of cargoes operating on the corresponding type of transport.

8.2 the Flux should be stored in covered unheated warehouses for the storage group 3Ж3 GOST 15150.

9 manufacturer’s Warranty

9.1 the Manufacturer guarantees the conformity of the flux requirements of this standard under the conditions of transportation, storage and operation.

9.2 the Warranty period of storage fluxes — 2 years from date of manufacture.



The text of the document is verified by:
the official publication of the
M.: IPK Publishing house of standards, 2005