Mold material on the glass
Date:2011/10/28 12:23:07 Hits:18572
Glass mold and frequently higher than 1100 ℃ molten hot glass contact, undergo oxidation, thermal shock, and thermal glass sliding contact with friction and wear, mold and hot glass contact process, the cavity surface temperature exceeds eutectoid transformation temperature, mold cycle of phase change material occurs the surface leaving the mold cavity surface cracks glass products with high-speed, lightweight, mold materials, oxidation resistance, thermal fatigue resistance, high wear resistance and a higher thermal conductivity requirements aim of this paper is to study the phase transition to avoid loops, to meet the performance requirements of the glass mold cast iron material in this paper is to study the technical route to join by adding nickel or expanding or stable austenite region some copper, manganese, at room temperature stable austenite to avoid the mold temperature phase transition occurring within a circle; join FeSi75 inoculation of titanium and a D-type graphite, increase oxidation resistance; adding Cr, Mo, V and other trace alloying elements to improve high temperature performance and wear resistance. study the different cooling rates and different amount of titanium-containing austenitic cast iron D-type graphite formation. to determine the ordinary wet sand casting, stable at room temperature, the D-type graphite chemical composition of austenitic cast iron . on the different components of the oxidation resistance of austenitic cast iron, heat fatigue, wear resistance and thermal conductivity were studied analysis of the existing D-type graphite ferritic cast iron and ordinary gray cast iron mold material compared to glass , at 850 ℃ high temperature insulation 150h oxidation test, the oxidation resistance of austenitic cast iron at least 30% or more in the thermal fatigue test, the specimen heated to 900 ℃ heat 2min, and then quenched in warm water burglary, allowed to fully cooling, D-type graphite austenitic cast iron thermal fatigue cracks often than the first D-type graphite ferritic cast iron 3-8 times lower, but the maximum radial deformation than the D-type graphite ferritic cast iron to reduce the 20 percent in the ML-10-type wear tester pin disc wear test, the average relative wear of austenitic cast iron than the D-type graphite ferritic at least 30% lower, austenite matrix material at room temperature and the glass mold work temperature cycle does not occur within the phase transition, with good high temperature strength, wear resistance under high-temperature conditions than the D-type graphite ferritic cast iron will be better. on the D-type graphite in the thermal conductivity of austenitic cast iron glass mold working temperature range in the light, in the range 500 ~ 700 ℃, the thermal diffusivity close to or above the ordinary gray cast iron HT300, so D-type graphite austenitic cast iron at high temperatures with good thermal conductivity. preliminary study of the use of inexpensive copper, manganese, nickel metal to replace the expensive part of a D-type graphite austenitic cast iron Austria, and not with copper, nickel, manganese instead of part of D-type graphite austenitic cast iron compared to oxidation resistance, thermal fatigue performance have a greater degree of decline above experimental study, D-type graphite austenitic cast iron is made of fine glass mold material, the best ingredients: C 2.75%, Si 2.1%, Mn 0.65%, P <0.04%, S <0.02%, Ni 20%, Cr 0.4%, Mo 0.7%, V.