(57) Abstract:The invention relates to an abrasive material processing, in particular to the compounds grinding materials for machining hardened steels. The technical result consists in obtaining a high surface finish when machining hardened steels is due to the fact that the abrasive powder contains at its core and the aluminum oxide and the oxides of iron, calcium, sodium in a certain percentage. Provides a receiving surface hardened steel Ra of 0.014-0.017 microns. table 1. The invention relates to abrasive machining of non-metallic and metallic materials, in particular to the compounds grinding materials for machining hardened steels.Known abrasive powders used for finishing (polishing and finishing) hardened steels contain chromium oxide .The drawback of such materials is that they relate to hazardous materials.Also known abrasive powders used for finishing of hardened steels on the basis of CBN and diamond powders .The disadvantage of these is more close to the proposed composition of the components of an abrasive material, containing the aluminum oxide, silicon dioxide and metal oxides; for example, manganese oxide and chromium oxide .However, the known abrasive powder having high strength, creates reschny background when finishing hardened steels.The task - getting high surface finish when machining hardened steels.The problem is solved in that the abrasive powder containing silicon dioxide, aluminum oxide and other metal oxides, and the oxides of the metals contain iron oxide, sodium oxide, calcium oxide and aluminum oxide in the following ratio, wt.%:
Silicon dioxide - 0,02
The sodium oxide - 0,25 - 0,35
Iron oxide - To 0.006
Calcium oxide - 0,02
-Aluminum oxide - 25 - 32
-Aluminum oxide - Rest
New technical solution is that as the metal oxides used iron oxide, sodium oxide, calcium oxide and aluminum oxide.Abrasive powder obtained as follows.As a source of raw materials used nefelinovye clay, containing a hydroxide of aluminum, iron, sodium, calcium, silicon. When the temperature tit dehydration of the hydroxide of the metals into oxides. Gas passing through the furnace, makes the fine fraction of the material that is captured by electrostatic precipitators. The product deposited on the electrostatic precipitators is new material.Obtained by grinding the material felt when finishing hardened balls of steel SH-15 on the machines MLB-800. Lot size 200 kg of the test Results shown in the table.Positive effect on the increase of surface roughness due to the fact that the presence in the basis of the ratio and the aluminum oxide improves retirement powder in the process.Sources of information
1. Olander L. A. "Technology and equipment for ball production. - Minsk, "Higher school", 1974, S. 276-281.2. Abrasive and diamond processing materials. The Handbook. Under. editor Dr technology. Sciences Professor A. N. Reznikov. - M., engineering, 1997, S. 15, 22.3. A. S. N 1112043 the USSR, IPC C 09 K 3/14, B 24 D 3/00, 1984. Abrasive powder containing silicon dioxide, aluminum oxide and other metal oxides, characterized in that it as other metal oxides contains iron oxide, sodium oxide, calcium oxide and aluminum oxide in the following ratio, wt.%:
Silicon dioxide - 0,R>-Aluminum oxide - Rest
FIELD: abrasive tools for super finish treatment of materials.
SUBSTANCE: claimed mass contains calcium aluminate and magnesia binder as coupling agent; fused corundum or polishing material with diamond powder and adhesive additive in form of sodium fluoride and aluminum hydroxide mixture as abrasive. In addition it contains mixture of sodium and potassium fluorides as promoter of polishing process and emulsion of reactive polysiloxane in water as water-repellent agent.
EFFECT: treatment with increased intensity and treated surface of improved quality.
2 cl, 1 tbl