CS236711B1 - Filling of tubular steel wire for the formation of abrasion resistant layers - Google Patents

Abstract

The invention relates to engineering technology. The invention solves the problem of a suitable filling of tubular steel wire intended for renovation and production of functional flat steel parts by welding abrasion-resistant layers. The filling according to the invention contains 2.24 to 5.6 wt. % ferromanganese or manganese, 18.24 to 41.5 wt. % ferrochrome or chromium, 1.2 to 4.15 wt. % ferrosilicon or silicon, 4.2 to 11.8 wt. % ferrotungsten or tungsten, 4.02 to 13.8 wt. % ferromolybdenum or molybdenum and 25 to 60.1 wt. % iron powder.

Description

The invention relates to a tubular steel wire fill for the formation of abrasion-resistant layers by welding during the renovation and production of functional fillings of steel components.

[0003] The currently used ripper grits usually contain a filler made of powdered components of ferro-steels, respectively metals, or wax-forming, gas-forming and ionizing components. In the case of tubular wire used by the submerged arc welding technology, the gas generating and wrecking components are usually omitted, since their function is provided by the flux.

For example, in one case, the tubular steel wire fill contains 5.5 to 7.5 wt. % ferro molybdenum, 1.2 to 2.5 wt. % of ferrovanadium, 5.5 to 6.5 wt. % ferro-chromium, 1.5 to 1.7 wt. % ferro-tungsten, 2.0 to 2.4 wt. 0.4% to 0.6% wt. ferromangene, 3.0 to

4.5 wt. % of sodium fluorosilicate, in other cases 40 to 60 wt. % ferrovanadium, 20 to 40 wt. % ferrochromium, 2 to 12 wt. % tungsten powder, 2 to 8 wt. up to 16 wt. % ferromolybdenum, 1 to 4 wt. % of ferrotitanate, 1 to 4 wt. % of fermangan, up to 6 wt. sodium fluoride.

Such cartridges fill the trough of the steel tubing strip. The weight ratio of the fill in the tubular pulp to the weight of the tubular pulp depends on the chemical composition of the deposit. In practice, tubular steel wire with such fillings is used for refurbishment and production of functional fillings by welding. The welds thus obtained have resistance to abrasion as well as to cyclic thermal and dynamic wear at higher temperatures. The use of such fillers has the disadvantages that are manifested, in particular, by the inhomogeneity of the tubular wire filler after a long time of filling by means of foaming devices. This disadvantage is particularly evident when the cartridge contains hygroscopic components, as a result of which lumps are formed in the mixture of the cartridge which impair its flowability.

As a consequence, the welding-technological properties of the tubular wire during the use thereof are deteriorated and also the satisfactory uniform chemical composition of the welded layer is not ensured.

These disadvantages are largely eliminated by the invention. SUMMARY OF THE INVENTION [0003] The filler of tubular steel wire intended for the refurbishment and production of functional fillings of steel components by abrasion-resistant layers comprises 2.24 to

5.6% % ferromengane or manganese, from 18.24 to 41.5 wt. ferrochromium or chromium,

1.2 to 4.15 wt. % ferrosilicon or silica, 4.2 to 11.8 wt. % ferro-tungsten or tungsten, 4.02 to 13.8 wt. % ferro molybdenum or molybdenum, 25.0 to 60.1 wt. iron powder.

The tubular steel wire fill according to the invention shows good flowability and does not contain hygroscopic components or components containing chemically bonded crystalline water.

This also achieves an improved uniformity of filling of the tubular steel wire, an improvement in its welding and technological properties during the welding, thereby increasing the uniformity of the chemical composition of the welded layer. The filler according to the invention allows for an increased melting capacity of the tubular steel pulp containing iron powder. An important result of these improvements is an increased resistance to abrasive and cyclic dynamic and thermal stress due to the uniform chemical composition and structure of the weld layer, thereby increasing the service life of the welded surface of the steel component.

According to the invention, a cartridge was produced which contained 5.56 wt. feromengánu.

37.61% wt. % ferrochromium, 4.12 wt. % ferrosilicon, 11.55 wt. % ferro-tungsten, 13.04 wt. % ferro molybdenum and 28.12 wt. iron powder.

Further, according to the invention, a filler containing 5.0 wt. % feromangene, 36.0 wt. % ferrochromium, 3.5 wt. ferrosilicon ,. 7.5 wt. % ferro-tungsten, 7.8 wt. % ferro molybdenum and 40.2 wt. iron powder.

'. 236711

Also according to the invention, a cartridge was produced which contained 5.0 wt. % ferromangan, 36.0 wt. % ferrochromium, 3.5 wt. % ferro-silicon, 5.3 wt. % tungsten powder, 5.08 wt. % molybdenum powder and 45.12 wt. iron powder.

Said fillings have been well proven in the filling of tubular steel coils because they are not winding and are good flowable. Welds made of tubular steel coils with these fillers had good mechanical and physical properties and high abrasion resistance even at higher temperatures. ¹

The filler according to the invention can be used for tubular steel wire intended for the refurbishment and production of functional steel parts by mechanized flux welding, mainly neutral to basic, which ensures an economical appreciation of the alloying elements. Welded metal, obtained without pre - heating of welded tubular parts. This material is free of defects and is thus intended for the economical and productively restoration work of functional steel parts and their production.

Claims (1)

OBJECT OF WINE. A tubular steel wire fill for welding abrasion-resistant layers, characterized in that it contains 2.24 to 5.6% by weight. % ferro-manganese or manganese, 18.24 to 41.5 wt. % of ferrochromium or chromium, 1.2 to 4.15 wt. % ferrosilicon or silica, 4.2 to 11.8 wt. % ferro-tungsten or tungsten, 4.02 to 13.8 wt. % of feroholybdenum or molybdenum and 25.0 to 60.1 wt. iron powder.