CN101596657B

CN101596657B - Ultra-low-carbon heat-resistant steel flux-cored wire capable of carrying out all-position welding

Info

Publication number: CN101596657B
Application number: CN2009100695866A
Authority: CN
Inventors: 郑子行; 郑子新; 杨新禄; 崔伟; 高盛平; 张春田
Original assignee: TIANJIN BRIDGE WELDING MATERIALS GROUP CO Ltd
Current assignee: Tianjin Daqiao Soldering Wire of Metal Co., Ltd.
Priority date: 2009-07-06
Filing date: 2009-07-06
Publication date: 2011-05-04
Anticipated expiration: 2029-07-06
Also published as: CN101596657A

Abstract

The invention relates to an ultra-low-carbon heat-resistant steel flux-cored wire capable of carrying out all-position welding, comprising a high-quality low-carbon cold-rolled steel belt sheath and a flux core, wherein the flux core comprises the following components by mass fractions: 28 to 36% of TiO2, 2 to 6% of CaCO3, 1 to 4% of CaF2, 2 to 8% of SiO2, 1 to 6% of O3Al2, 1 to 5% of rare earth silicon, 5 to 8% of manganese metal, 14 to 17% of metallic chromium, 9 to 13% of molybdenum iron and 15 to 20% of other alloy. The welding seam metal of the flux-cored wire has superior high-temperature oxidation resistance, heat resistance and crack resistance, the matching of the mechanical property of the welding seam metal is rational, especially all-position welding can be carried out, and the operating performance is superior; and sinter can form short slag in the welding process to decrease spattering, electric arcs are stable, the spattering is smaller, and the figuration is beautiful.

Description

A kind of ultra-low-carbon heat-resistant steel flux-cored wire that carries out all-position welding

Technical field

The present invention relates to technical field of welding materials, particularly a kind of ultra-low-carbon heat-resistant steel flux-cored wire that can carry out comprehensive welding.

Background technology

Heat resisting steel has two kinds of key propertys usually: the one, and long-term work at high temperature and the erosion of non-reason medium cause destroying, and this performance is the high temperature oxidation resistance of steel; The 2nd, at high temperature still have stable intensity, under long-term stand under load situation, can not produce large deformation or disrumpent feelings.So the heat-resistant steel welding material also should have the performance that is complementary with heat resisting steel except that the requirement of satisfying welding procedure.

Summary of the invention

The inventor has passed through a large amount of development test work, has prepared the heat-resistant steel flux-cored wire that a kind of welding procedure is good, electric arc is steady, cracking resistance is good, also can carry out all-position welding.

The object of the present invention is to provide a kind of ultra-low-carbon heat-resistant steel flux-cored wire that carries out all-position welding.

The present invention can carry out the ultra-low-carbon heat-resistant steel flux-cored wire of all-position welding, is made of high-quality low-carbon cold rolling steel-tape sheath and medicine core, and the medicine core is made up of each component of following mass fraction:

TiO ₂28%～36%, CaCO ₃2%～6%, CaF ₂1%～4%, SiO ₂2%～8%, Al ₂O ₃1%～6%, rare earth silicon 1%～5%, manganese metal 5%～8%, crome metal 14%～17%, molybdenum-iron 9%～13%, other alloys 15%～20%.

Described other alloys are meant the mixture of ferrotianium and iron powder, and the mass fraction of titanium-iron powder is≤25% in the mixture.

In order to obtain better effect, the component of medicine core is preferred: TiO ₂34%～36%, CaCO ₃3%～4%, CaF ₂1%～2%, SiO ₂2%～4%, Al ₂O ₃1%～2%, rare earth silicon 3%～4%, manganese metal 5%～7%, crome metal 14%～16%, molybdenum-iron 10%～11%, other alloys 15%～16%.

Or it is preferred: TiO ₂28%～30%, CaCO ₃4%～5%, CaF ₂3%～4%, SiO ₂2%～3%, Al ₂O ₃1%～2%, rare earth silicon 3%～4%, manganese metal 6%～7%, crome metal 16%～17%, molybdenum-iron 12%～13%, other alloys 17%～19%.

The weld metal of welding wire of the present invention has high temperature oxidation resistance, heat resistance and crack resistance, has also guaranteed good welding technological properties when having realized the welding of full position.

Flux-cored wire of the present invention does not have specific (special) requirements in preparation, adopt the interior general manufacturing process of industry to realize.

Advantage of the present invention and characteristics are:

1, be used for heat resisting steel, and can carry out the welding of full position, operating characteristics is good.

2, weld metal mechanical property coupling rationally

3, weld metal has good high temperature oxidation resistance, heat resistance and crack resistance.

4, welding procedure is good, arc stability, and it is less to splash, and it is attractive in appearance to be shaped.

5, slag can form short slag in welding process, and making splashes reduces.

The specific embodiment

In order to understand the present invention better, be described further below by embodiment, but do not limit the present invention.

Embodiment 1-4 can carry out the preparation of the ultra-low-carbon heat-resistant steel flux-cored wire of all-position welding

The appearance strip material of welding wire adopts high-quality ultra-low carbon cold-rolling steel band, and its chemical composition is as shown in table 2.

Table 2, low-carbon cold rolling steel band chemical composition (mass fraction %)

C	Mn	Si	S	P
					≤0.04	0.18-0.26	≤0.10	≤0.03	≤0.03

Get each component by the prescription of table 3, adopt the general manufacturing process of welding material production industry to be prepared into flux-cored wire.

Table 3

Paint ingredient	Implement 1	Implement 2	Implement 3	Implement 4
					TiO ₂	28	36	34	30
CaCO ₃	4	3	5	4
					CaF ₂	4	1	2	2
SiO ₂	2	4	5	7
					Al ₂O ₃	2	2	4	4
Rare earth silicon	4	4	3	3
					Manganese metal	7	7	7	7
Crome metal	17	16	15	15
					Molybdenum-iron	13	11	10	10
Other alloys	19	16	15	18

Experimental example 1

The deposited metal composition test of the flux-cored wire that embodiment of the invention 1-4 is prepared, result such as table 4.

Table 4: deposited metal composition (mass fraction %)

	C	Mn	Si	S	P	Cr	Mo
								Implement	0.05	0.59	0.34	0.010	0.014	2.55	1.30

1
								Implement 2	0.04	0.63	0.40	0.010	0.012	2.38	1.10
Implement 3	0.04	0.56	0.32	0.011	0.012	2.33	0.95
								Implement 4	0.03	0.55	0.35	0.010	0.018	2.3	0.93

Experimental example 2

The deposited metal Mechanics Performance Testing of the flux-cored wire that embodiment of the invention 1-4 is prepared, result such as table 5.

Table 5: deposited metal mechanical property

	Tensile strength R _m MPa	Tensile strength R _e1 MPa	Percentage elongation A %
				Implement 1	796	703	16.4
Implement 2	732	637	21.4
				Implement 3	656	573	20.6
Implement 4	675	586	21

Post weld heat treatment: 620 ℃ ± 15 ℃ * 2h

Claims

1. the ultra-low-carbon heat-resistant steel flux-cored wire that can carry out all-position welding is made of high-quality low-carbon cold rolling steel-tape sheath and medicine core, it is characterized in that the medicine core is made up of each component of following mass fraction: TiO ₂28%～36%, CaCO ₃2%～6%, CaF ₂1%～4%, SiO ₂2%～8%, Al ₂O ₃1%～6%, rare earth silicon 1%～5%, manganese metal 5%～8%, crome metal 14%～17%, molybdenum-iron 9%～13%, other alloys 15%～20%;

Described other alloys are meant the mixture of ferrotianium and iron powder, and the mass fraction of titanium-iron powder is≤25% in the mixture;

Described high-quality low-carbon cold rolling steel is meant that the mass fraction of its chemical composition is the cold-rolled steel of C≤0.04, Mn0.18-0.26, Si≤0.10, S≤0.03 and P≤0.03.

2. the ultra-low-carbon heat-resistant steel flux-cored wire that carries out all-position welding according to claim 1 is characterized in that the medicine core is made up of each component of following mass fraction: TiO ₂34%～36%, CaCO ₃3%～4%, CaF ₂1%～2%, SiO ₂2%～4%, Al ₂O ₃1%～2%, rare earth silicon 3%～4%, manganese metal 5%～7%, crome metal 14%～16%, molybdenum-iron 10%～11%, other alloys 15%～16%.

3. the ultra-low-carbon heat-resistant steel flux-cored wire that carries out all-position welding according to claim 1 is characterized in that the medicine core is made up of each component of following mass fraction: TiO ₂28%～30%, CaCO ₃4%～5%, CaF ₂3%～4%, SiO ₂2%～3%, Al ₂O ₃1%～2%, rare earth silicon 3%～4%, manganese metal 6%～7%, crome metal 16%～17%, molybdenum-iron 12%～13%, other alloys 17%～19%.