SU894014A1 - Steel for welding wire - Google Patents

Description

(54) STEEL FOR WELDING WIRE

The invention relates to metaplurgy, in particular, to finding steel dp of welding wire, for welding the design of low carbon stainless high strength martensitic, austenitic-martensitic and martensitic-ferritic classes, operating at low temperatures to -196 C. The following chemical is known composition, weight. %: O, O05-0.03 Carbon 1.2-2.0 Silicon 0.2-1.0 Manganese 10.5-13.0 7.0-9.5 Nickel Molybdenum 1.6-2.3 Lanthanum 0.01-ODO Niobium 0.02-0.2 0.01-0.2 0.601-O, 10 Calcium Else Iron However, the cast metal of the weld seams filled with automatic arg welding or under flux with wire of famous steel, prone to hot cracking, and in a number of cases it has low ductility and toughness at negative temperatures. The closest to the proposed is steel 21, a trace of lean chemical composition, wt.%: 0.01-0.1 Carbon 0.03-1 Silicon 0.5-2.5 Manganese 0.05-10 0.05-10 Nshsel O, O05-O, 8 Molybdenum 0, O5-1O 0.003-0.04 Balance Iron As optional elements it may contain,%: aluminum 0.005-0.3, niobium, vanadium 0.003-0.8, calcium, boron 0.0005-1.0 G2}. The disadvantage of the known steel is the low impact toughness of the weld at low temperatures. The values of impact toughness of a welded joint, made with a wire of known composition, are Bniaet at a temperature of liquid nitrogen 1, О11-СМ / СМЛ

The purpose of this invention is to increase the toughness of the weld at low temperatures down to -3.96 C.

This objective is achieved in that steel containing carbon, silicon, manganese, chromium, nickel, molybdenum, copper, and iron further comprises. nitrogen and at least one element from the group containing yttrium, zirconium and tantalum hfi the following ratio of components, Unav.%:

Carbon OO5-0,03

Silicon0.03-0.5

Manganese 1.7-8, O

Chrome8,1-13,5

Nickel 4,0-14,0

Molybdenum 0.15-6,

Copper0.05-3.0

Titanium0.005-0.85

Nitrogen0,005-0,08

at least one element from the group containing, wt.%: Yttrium, zirconium and tantalum 0.0005-0.3

ZheLeaoOstalnogo

The introduction of nitrogen, yttrium, zirconium, and tantalum in steel in the indicated amounts allows an increase in the impact strength at -i9Q ° C,

The chemical composition and impact toughness of the weld of the proposed steel are given in the table. Welding is carried out on steel grade OZH12I9G2MD.

Claims (2)

The use of the proposed steel for the manufacture of welding wire will increase the toughness of the weld made by this wire and obtain an economic effect of 633 thousand rubles a year. 7 89401.Formula of the invention. Steel op welding welding wire, contains carbon, extreme, manganese, chromium. nickel, molybdenum, copper, titanium and iron, s characterized by the fact that, with the help of increasing the toughness of the weld seam at temperatures down to –19Q ° C, it additionally contains nitrogen and at least one element from the group containing Youtube yttrium, zirconium and tantalum, with the following ratio of components, wt.%: Carbon O, OO5-O, OZ Silicon 0.03-0.5 Manganese 1.7-8.0 15 Chromium 8.1-13.5 Nickel. 4, O-14.0 48 Mo. 0.15-6.0 Copper, 05-3.0 Titanium 0.005-0.85 Nitrogen 0.005-0.08 j at least one element from the group containing, wt.% Yttrium, zirconium and tantalum 0, O005-O , 3 Iron Else Sources of information taken into account in the examination of the USSR Copyright Certificate 534517, кп. C 22 C 38/48, published 1974. 2. For Japan Japan No. 52-131923, class 103 183, 1976.