CN104588907B

CN104588907B - A kind of transition zone built-up welding rustless steel open arc flux-cored wire

Info

Publication number: CN104588907B
Application number: CN201410748796.9A
Authority: CN
Inventors: 郑子行; 杨敬雷; 杨天文; 杨钢; 杨新禄
Original assignee: TIANJIN DAQIAO SOLDERING WIRE OF METAL CO Ltd
Current assignee: TIANJIN DAQIAO SOLDERING WIRE OF METAL CO Ltd
Priority date: 2014-12-09
Filing date: 2014-12-09
Publication date: 2016-06-22
Anticipated expiration: 2034-12-09
Also published as: CN104588907A

Abstract

The invention discloses a kind of transition zone built-up welding rustless steel open arc flux-cored wire, welding wire crust and medicated core including low-carbon cold rolling steel band, according to mass percent, described medicated core medicated powder formula is: crome metal 35～50%, low-silicon iron 1～6%, electrolytic manganese 5～15%, metallic nickel 12～25%, rutile 5～20%, almag 5～15%, fluorite 8～18%。The chromium content of described crome metal is not less than 99%, and the Fe content of electrolytic manganese is not less than 99%, and the silicone content of low-silicon iron is 40～46%, and the nickel content of metallic nickel is not less than 99%, and the Ti content of rutile is more than 95%, and the Calcium Fluoride Content of fluorite is not less than 95%。Described medicated core medicated powder granularity is less than 60 orders。The flux-cored wire of the present invention, is not added with any solder flux during welding and protective gas just can be made directly built-up welding。Dilution mother metal, arc stability is good。Weld seam has flux shielding, has higher plasticity and toughness。

Description

A kind of transition zone built-up welding rustless steel open arc flux-cored wire

Technical field

The present invention relates to the transition zone built-up welding rustless steel open arc flux-cored wire that crust metal is carbon steel, during particularly to the built-up welding of carbon equivalent high metal surface, do a kind of rustless steel open arc flux-cored wire that transition zone uses。

Background technology

When carrying out the large special wear resistant parts Bead weld repair such as roll, mill, grinding roller, owing to mother metal itself is mostly medium high carbon alloy steel, solderability is poor, and crackle easily occurs in welding process, and overlay cladding thickness is greatly affected by restriction, peeling off, falling the phenomenons such as block easily occur in use procedure。The service life and the number of times that make large special wear resistant parts are substantially reduced。

Summary of the invention

The technical problem to be solved is to provide a kind of transition zone built-up welding rustless steel open arc flux-cored wire, has self-shield characteristic; can directly weld and not need solder flux and gas shield; can open arc welding, can indirect observation molten bath and weld seam, conveniently regulate welding procedure。

In order to solve above-mentioned technical problem, the technical solution used in the present invention is: a kind of transition zone built-up welding rustless steel open arc flux-cored wire, including welding wire crust and the medicated core of low-carbon cold rolling steel band, according to mass percent, described medicated core medicated powder formula is: crome metal 35～50%, low-silicon iron 1～6%, electrolytic manganese 5～15%, metallic nickel 12～25%, rutile 5～20%, almag 5～15%, fluorite 8～18%。

The chromium content of described crome metal is not less than 99%, and the Fe content of electrolytic manganese is not less than 99%, and the silicone content of low-silicon iron is 40～46%, and the nickel content of metallic nickel is not less than 99%, and the Ti content of rutile is more than 95%, and the Calcium Fluoride Content of fluorite is not less than 95%。

Described medicated core medicated powder granularity is less than 60 orders。

The invention has the beneficial effects as follows: be not added with any solder flux during welding and protective gas just can be made directly built-up welding。Dilution mother metal, arc stability is good。Weld seam has flux shielding, has higher plasticity and toughness。

Detailed description of the invention

Below in conjunction with detailed description of the invention, the present invention is described in further detail:

The transition zone built-up welding of present invention rustless steel open arc flux-cored wire, the appearance strip material of flux-cored wire adopts high-quality low-carbon cold rolling steel band, the mass fraction of medicated core consists of: crome metal 35～50%, low-silicon iron 1～6%, electrolytic manganese 5～15%, metallic nickel 12～25%, rutile 5～20%, almag 5～15%, fluorite 8～18%。

Flux-cored wire of the present invention adopts general conventional manufacturing process in industry to prepare, in order to realize best combination property, medicated powder raw material is preferred: the chromium content of crome metal is be more than or equal to 99%, the Fe content of electrolytic manganese is be more than or equal to 99%, the silicone content of low-silicon iron is 40～46%, and the nickel content of metallic nickel is be more than or equal to 99%, and the Ti content of rutile is more than 95%, the Calcium Fluoride Content of fluorite is be more than or equal to 95%, and various raw materials all cross 60 mesh sieves。

The use mechanism of transition zone flux-cored wire of the present invention:

Some large special wear resistant parts, mostly adopt medium high carbon alloy steel to be integrally cast such as roll, grinding roller, mill etc., use certain time rear surface there will be fatigue crack, falls the defects such as block, need to carry out Bead weld repair, and bead welding wire also all mostly adopts high alloy system, due to the middle and high carbon alloy system of mother metal during built-up welding, mother metal entirety carbon equivalent is higher, causing that mother metal solderability is poor, during as roll repair welding, easily there is segmentation crack in surface, causes Bead weld repair failure；Although and grinding roller, mill allow some segmentation cracks occur, but the resistance to impact of heap postwelding entirety is substantially reduced, peeling off, falling the defects such as block very easily occur in use procedure。And stainless overall plasticity and toughness are higher, adopt open arc stainless flux-cored wire to carry out one layer or which floor transition built-up welding, it is possible to dilution matrix constituent, reduce carbon equivalent, the probability of crackle occurs when reducing roll overlaying；The shock resistance of deposited metal can be improved by composition transition, be substantially reduced the peeling in grinding roller, mill use procedure, fall block phenomenon。

In order to understand the present invention, further illustrate the present invention below in conjunction with embodiment, but be not intended to the present invention。

Embodiment 1～4 prepares transition zone built-up welding rustless steel open arc flux-cored wire of the present invention

The crust metal of welding wire adopts low-carbon cold rolling steel band, and width is 14mm, and thickness is 0.30mm；Its chemical composition is as shown in table 1。

Table 1, low-carbon cold rolling steel band chemical composition (mass fraction)

C	Mn	Si	S	P
					≤0.05	0.18-0.26	≤0.10	≤0.03	≤0.03

Each raw material powder is taken by table 2, mix homogeneously, what load flux-cored wire forming machine adds in powder device, is progressively rolled into U-shaped steel band and uniformly adds medicated powder, lap seal is carried out, through the flux-cored wire that welding wire draw is become diameter to be 2.4～2.8 millimeters by wire drawing machine then through rolling。

Table 2, transition zone built-up welding rustless steel open arc flux-cored wire medicated powder mass fraction formula (%)

Experimental example 1～4

With the flux-cored wire prepared by embodiment of the present invention 1-4, adopting the welding machine of flat characteristic power supply to be made directly built-up welding welding, welding current selects 400A, voltage 30V, and test plate (panel) is common low carbon steel plate, is of a size of 200X100X20mm。For preventing the dilution of base metals Resistance of Weld Metal, overlay cladding thickness is more than 12 millimeters。

Table 3 embodiment 1-4 transition zone built-up welding rustless steel open arc flux-cored wire

Deposited metal composition (mass fraction)

	C	Mn	Si	S	P	Cr	Ni	All the other
									Implement 1	0.03	5.80	0.72	0.010	0.013	18.20	9.25	Fe
Implement 2	0.03	5.52	0.65	0.010	0.013	19.02	9.16	Fe
									Implement 3	0.03	5.20	1.02	0.010	0.012	19.25	9.05	Fe
Implement 4	0.03	5.30	0.68	0.010	0.012	18.82	8.60	Fe

Flux-cored wire prepared by embodiment of the present invention 1-4 is carried out chemical composition analysis result as shown in table 3。Being found out by table 2 and table 3, in embodiment of the present invention 1-4, embodiment 2 slag covering property, slag fissility, resistance to pore and welded pass visual shape are all excellent, and weld seam plasticity and toughness are better, and peeling off, falling the defects such as block not easily occur in actual weld deposit process。On the contrary, in embodiment 1 due to crome metal outside the scope of the invention relatively low, so crome metal mass fraction is low in table 3, in embodiment 3 due to low-silicon iron outside the scope of the invention higher, in table 3, the mass fraction of silicon is high, all causing weld seam plasticity and toughness to decline, peeling off, falling the defects such as block easily occur in actual welding process, and molding is poor。In embodiment 4, fluorite content is bigger than normal, causes welding process to splash relatively big, makes welding process not easily carry out。

Wearing piece mother metal is carried out transition zone reparation by the flux-cored wire of high-plasticity of the present invention, and matrix constituent is diluted, and improves the plasticity and toughness of deposited metal, has stopped the appearance of crackle in weld deposit process, greatly reduces peeling in use procedure, falls block phenomenon。Substantially increase the service life of large special wear resistant parts。

Embodiment described above is merely to illustrate technological thought and the feature of the present invention, its object is to make those skilled in the art it will be appreciated that present disclosure implementing according to this, the scope of the claims of the present invention only can not be limited with the present embodiment, what namely all disclosed spirit was made changes on an equal basis or modifies, and still drops in the scope of the claims of the present invention。

Claims

1. a transition zone built-up welding rustless steel open arc flux-cored wire, welding wire crust and medicated core including low-carbon cold rolling steel band, it is characterized in that, according to mass percent, described medicated core medicated powder formula is: crome metal 35～50%, low-silicon iron 1～6%, electrolytic manganese 5～15%, metallic nickel 12～25%, rutile 5～20%, almag 5～15%, fluorite 8～18%；The silicone content of described low-silicon iron is 40～46%, and the Ti content of rutile is more than 95%, and the Calcium Fluoride Content of fluorite is not less than 95%。

2. transition zone built-up welding rustless steel open arc flux-cored wire according to claim 1, it is characterised in that the chromium content of described crome metal is not less than 99%, and the Fe content of electrolytic manganese is not less than 99%, and the nickel content of metallic nickel is not less than 99%。

3. transition zone built-up welding rustless steel open arc flux-cored wire according to claim 1 and 2, it is characterised in that described medicated core medicated powder granularity is less than 60 orders。