SU1155401A1 - Composition of alloying material - Google Patents

Abstract

COMPOSITION OF THE APPLIANCE MATERIAL on the author. St. N 967746, characterized in that, for the purpose of higher productivity due to an increase in depth (composition, the composition additionally contains cadmium-fluoride and fluorine fluoride with a trace of relative components, in wt.%: Hbke 18-26 Rishy0,7- 1 Tktai2,0-4,0 Aluminum iy2jd-6JO Kada fluoride "1y5,0-10 Hafium fluoride3,0-5,0 Chrome Ospry

Description

The invention relates to welding materi- als, in particular, to flux-cored wires, intended for welding apparatus from applied in chemical engineering of steels and alloys. According to the main author. St. No. 967746 is known the composition of the filler material 1, containing the components introduced in a ratio, in wt.%: Nickel18-26 Rhenium0.7-1.3 Titanium2-4 Aluminum2-6 Chromium Remaining Experimental studies and practice of using this composition of the filler material as The charge of the welding flux-cored wire showed that it, being simple to manufacture and improved by its sanitary and hygienic indicators during melting, provides at the same time an increased resistance of the weld metal to hot cracks, intercrystal lithium oh corrosion and the effects of particularly aggressive q) ed. However, the use of a known composition of the filler material as a mixture of powder wire with a metal (of ordinary low carbon steel) sheath does not allow for adequate welding performance, i.e. Achieving an acceptable penetration depth, it becomes necessary to mechanically cut the edges to be welded (at a thickness of more than 5 mm), which leads to real costs during preparatory operations. The aim of the invention is to increase the productivity of welding by increasing the depth of penetration. The goal is achieved by the fact that the composition of the filler material, mainly the charge of flux-cored wire for welding corrosion-resistant steels and alloys, additionally contains cadmium fluoride and hafnium fluoride in the following ratio of components, in wt.%: Nickel18-26 Rhenium 0.7-1-1 Titan2, 0-4.0 Aluminum2.0-6.0 Fluoride5.0-10.0 cadmium Fluoride3.0-5.0 Chromium Remaining Nickel, rhenium, titanium, aluminum and chromium are among the known components introduced by direct use. Their role is to give the seams the required corrosion resistance, providing the desired microstructure of the weld metal, increased crack resistance, mechanical and technological properties. The introduction of cadmium fluoride and hafnium fluoride imparts a new property to the wire. This is due to the flow of a new, previously unknown effect during its melting, which consists in a sharp change in the depth of penetration of the metal being welded. This effect is associated with the positive effect of new components on the increase in pressure of the arc column and is most pronounced in the case of their joint content in the charge. In particular, the separate introduction of 1–5% hafnium fluoride and 3–10% cadmium fluoride practically does not change the penetration depth during welding in conventional and forced modes, it is believed that the values of the indicator under consideration are at the level of the known composition filler material. With the joint introduction of 3 and 5%, these elements of the depth of penetration increases almost 2.5 times, and at 5-10% increases approximately 2.5-2.8 times. The excess of hafnium fluoride over 5% (for example, up to 7%) and cadmium fluoride over 10% (for example, up to 12%), as well as a decrease in the content of these elements, respectively below 3 n 5%, either does not lead to a further increase in the quality indicator under consideration or causes the effect to be fixed. Therefore, for hafnium fluoride and cadmium fluoride, the limit values are 3-5% and 5-10%, respectively. The intact formulations of the proposed wire with a diameter of 3 mm were produced using a conventional technology using a sheath of low-carbon tape with a hardness equal to 0.32 (table). Simultaneously with the experimental formulations, two batches of wires made by the same technology were also tested, with the same shell and filling factor, in which the known components were assigned along the upper and 1 st levels of content. The experiments were carried out by welding under the layer of the main flux using serial welding equipment and samples in the form of sheet plates with a size of .500x250x20 mm from 18-8 chromium-nickel steel and an alloy of the ZI-943 brand. In the course of the experiments, welding (surfacing) was carried out on fixed variable modes with a dry ground electrode identical in all cases; penetration depth

 11554014

it was evaluated metallographically for special purposes; it can be used in other industry-prepared templates for mechanical engineering (atomic, aeronautical

Welding in conventional modes, etc. (), producing welded structures

whether at a current of 270-310A, a voltage of 25-27V, of stainless steels.

arc travel speed 18-20 m / h, weld- j The economic effect of the introduction of the ancestor on forced modes was carried out at a current of 310-360A, a voltage of 28-30 V and a displacement speed of 16-18 m / h.

The proposed introduction of hafnium fluoride

and cadmium fluoride dramatically changes the production of | Q due to the refusal of machining, the productivity of welding with powder wire welded edges (especially crooked. The proposed composition of the filler material is a linear configuration), the increase by

Rial, mainly in the form of a mixture of powder-10-15% of the performance of the process

coil wire, can nagi wide when welding, and also reduce irrevocable

change in the manufacture of materials for the loss of stainless steel when mechanicizing chemical equipment. In addition, hem edge preparation.

The composition of the mixture of powder wires and properties of seams

the composition of the filler material (as compared with almost all cored wires) is 3.1 ÷ 5.8 rubles / kg of ground metal, which is achieved

0.7

2.0 2.0 1, 3 4.0 6.0 77, 3

2.0

2.8

2.2

62.7

2.7

Claims (1)

COMPOSITION OF ADDITIVE MATERIAL by author. St. N * 967746, characterized in that, in order to increase productivity by increasing the depth of penetration, the composition additionally holds cadmium fluoride and fluoride haf ny in the following ratio the one in wt.%: Nickel 18-26 Rhenium 0.7-1.3 Titanium 2.0-4.0 Aluminum 2.0-6.0 Fluoride cadmium 5.0-10 Fluoride hafnium 3.0-5.0 Chromium Rest 1155401.