METHOD OF MANUFACTURING CR-V CAST IRON CUTTING TOOLS

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to ferrous metallurgy, in particular to producing the incisors of u0445u0440u043eu043cu043eu0432u0430u043du0430u0434u0438u0435u0432u044bu0445 cast. the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 improving operating properties by u0441u043du0438u0436u0435u043du0438u00a0 propensity to tre u0449u0438u043du043eu043eu0431u0440u0430u0437u043eu0432u0430u043du0438u044e under impact load and u043fu043eu0432u044bu0448u0435u043du0438u00a0 wear-resistance.the proposed method includes u0437u0430u043bu0438u0432u043au0443 cast into shape, crystallization, cooling to 800 850 & deg; c, heating until 1210, 1220 & deg; c currents of high frequency (u0442u0432u0447), cooling with u0441u043au043eu0440u043eu0441 paragraph 10 - 30 & deg; c / c to 500 to 550 & deg; c, further to room temperature and the next for the two time vacation, with the first u0434u043bu0438u0442u0441u00a0 1.3 - 1.5 h in 540 to 550 & deg; c, and the second - 0.5 - 0.5 h u043fu0440u0438560 570 & deg;.the proposed method increases the work of filling the spent the incisors, 27 - 35%, and the u0438u0437u043du043eu0441u043eu0441u0442u043eu0439u043au043eu0435 it at elevated temperatures u0443u0432u0435u043bu0438u0447u0438u0432u0430u0435u0442u0441u00a0 at 25% - 40%. 1 3. p. s - lu, 1 table. yu