Brands with high magnesium (Mg) usually apply when modifying in a ladle. At an intra uniform way of modifying modifiers with the moderate content of Mg magnesium and other active elements (Ca, RZM) for the purpose of decrease in probability of education in castings of gas-shrinkable and surface defects are more often used. Especially good results on the prevention of formation of these defects are provided by the FSMG5LA modifier as a part of which of rare-earth elements one lanthanum contains.
Brands with the minimum content of magnesium use for reduction of evaporation of magnesium and elimination of a pyroelectric effect. The increased maintenance in them of Ca and RZM increases the modifying ability of material and at the same time reduces magnesium waste. These brands have well proved by production of castings with increased requirements to tightness.
Availability in modifiers of calcium gives the chance to control the speed of their dissolution, promotes refinement of cast iron from sulfur and oxygen, however the content of calcium is limited as at values of its more than 5% the modifier oshlakovyvatsya and is badly acquired by fusion. Additives of RZM (rare-earth metals) promote deformation globuly graphite, to their crushing, there is a neutralization of elements of deglobulyarizator (Bi, Sn, Sb, Pb) by formation of steady intermetallic compound.
Castings from a high-test cast iron with vermikulyarny graphite at a number of plants receive by means of FSMG5 and FSMG4 modifiers. However the stablest results are achieved when using special modifiers as a part of which along with magnesium there is a desferoidiziruyushchy element - titanium.
Modifiers complex are delivered in pieces with the maximum sizes of 150 mm and 50 mm or a shredded look on a size. Deliveries of other fractions, under preliminary approval are possible.
On a surface of pieces the oxide film and a raid of protivoprigarny materials is allowed.
Complex TU 14-5-134-86 modifiers (TU 14-5-134-2005)
|Brand||Fraction of toral mass of elements, %|
|silicon (Si)||magnesium (Mg)||calcium (Ca)||RZM||aluminum (Al)||iron (Fe)|
|FSMG4||45,0 - 65,0||3,5 - 4,5||0,2 - 1,0||1,0 - 2,0||2,5||OST.|
|FSMG5||45,0 - 55,0||4,5 - 6,5||0,2 - 1,0||0,3 - 1,0||1,2||OST.|
|FSMG7||45,0 - 55,0||6,5 - 8,5||0,2 - 1,0||0,3 - 1,0||1||OST.|
|FSMG6K2R6||43,0 - 52,0||6,0 - 7,0||2,0 - 3,0||to 5,0||1,5||OST.|
|FSMG7LA||45,0 - 55,0||6,0 - 6,8||0,4 - 0,8||0,5 - 0,65 La||1,2||OST.|