SU583897A1 - Iron build-on charge - Google Patents

Description

The invention relates to the field of mechanical engineering and can be used to restore the stock of machine parts from gray and high-strength cast iron.

The composition of the powder 1 for the surfacing of worn parts of a cast iron machine is known, weight. %;

Carbon 0.5-20

Fluorspar5-15

Calcium1-7

Silicon4-20

Aluminum1-9

Maxi 0.5-4

РЗМ0,1-2

Bor0.001-0.1

IronErest

The known composition of the powder for surfacing contains expensive and scarce materials - REM and boron, which must ensure the wear resistance and strength of the weld metal. However, these properties are insufficient, since they do not guarantee the reliability and durability of the work of reconditioned machine parts.

In order to reduce the cost, increase the mechanical and wear-resistant properties of the deposited metal, the composition of the proposed mixture additionally contains ferrochrome and ferrotitanium, with the following ratio of components, weight. %:

Carbon

0.5-20

Fluorspar 5-10

Silicon 4-20

Ferrochrome

0.5-10

Aluminum 1-8

Mali and and

0.1-4

Calcium 1-6

Ferrotitanium 1 - 10

Iron Powder Rest

The introduction of ferrochrome into the charge mixture makes it possible to obtain a weld metal doped with chromium, of increased strength and wear resistance. Ferrotptan also contributes to an increase in the level of mechanical properties due to the refinement of the structural components of the weld metal and an increase in its density.

The mechanical properties of the deposited metal are as follows: tensile strength - ai) 35-50 kg / mm-, strength jsa; zgib-cr1-, .. 60-105. hardness - 350 - 450 HB.

The preparation of the charge for surfacing cast iron is possible on any machine building

2 or a mechanical repair plant, since cheap and affordable ferroalloys are included in the charge. Magnesium, calcium i; Silicon must be introduced into the composition of the mixture in the form of LCKK type ligatures (5–10 Mg, 5–15 Ca, 40–55 Si, the rest is Fe), which are produced

0

Zaporozhye and Chelinsky ferroalloy plants.

In tab. 1 shows examples of charge for cast iron.

PTziosostoykost nanlavlNogo layer is 2 to 3 times higher than that of vyiol ne nnogo known / surfacing. Comparative properties of weld and weld metal are given in Table. 2

The charge for Naplaeki cast iron can be used for automatic welding and for the hard facing of gray and high-strength cast irons. Surfacing technology is no different from the known. The mixture in a given quantity enters the wire of the SV-08 type, which is fed to the floating part. Due to the electromagnetic field, capacity; around the wire, and the large content of the ferromagnetic component of the charge, a uniform charge shell is created around the wire. As the wire and charge are strained, a high-quality weld or weld seam is formed on the surface of the recoverable part. The casting iron can be widely used to repair cast iron and steel crankshafts and other parts of tractors and automobiles.

The crankshaft crankshaft of automobile vehicles, built-up using the proposed polymer, doubled compared with a melter of lightweight steel and is 50 thousand km to the nerve repair size.

T a b l II c a 2

Note. The composition of the modifiers, weight.

F .0 p m at L and inventions

The mixture for cast iron, carbon, aluminum, fluorine, magnesium, silicon, calcium, and iron, is different because, ic, the aim of lowering its cost-effectiveness, increase the mechanical and wear-resistant properties of the weld metal,

The 1x supplement contains ferrochrome and

ferrotitanium at C feed ratio of components, weight. %:

Carbon 0.5-20

Aluminum1-8

Fluke isat5-10

Magpium 0.1% -4%: KM-3-5 Mg; 6-8 Sa; 5 -10 V; -Y S1; 10 RZL1; stop Fe; KM-l-lOAlg; 10–20 Ca, 40 Si; stop Fe. 5 Silicon4-20 Calcium1-6 Ferrochrome0.5-10 Ferrotite: n1 -10 Iron powderEverything else. 583897 6 Sources of information taken for taking out at excertise 1. Application No. 2012592/27 dated 04.04.74, according to which the decision to issue the author's 5 certificate was made.