CN101028675A

CN101028675A - Stainless-steel and steel composite brazing alloy and its usage

Info

Publication number: CN101028675A
Application number: CN 200710065280
Authority: CN
Inventors: 孟庆连
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-10
Filing date: 2007-04-10
Publication date: 2007-09-05

Abstract

A solder suitable for stainless steel, carbon steel, and low-alloy steel contains Co (1.2-3.5%), Mn (2-4 Wt%), Ni (75-87), Fe (1-2), P (0.8-2), B (1-3), Cr (2-8), W (0.5-1), Si (0.5-1.8) and C (0.01-0.05). It features that its soldering temp is 400-500 deg.C lower than the smelting point of stainless steel and carbon steel and the smelting point of the soldered interface layer is increased by more than 200-300 deg.C, so it can be hot-rolled at 1000-1150 deg.C.

Description

A kind of stainless steel and steel composite brazing alloy and using method thereof

Technical field

The invention belongs to and belong to technical field of welding materials, a kind of stainless steel and steel composite brazing alloy and using method thereof particularly are provided, be mainly used in the recombination process of stainless steel and charcoal steel, low-alloy steel.

Background technology

The manufacture method of traditional composite metal plate mainly contains two kinds: the one, and it is compound to explode; The one, hot rolling is compound.

Exploding compound is that basal plate is placed on the smooth firm work anvil, normally on the cement plate, complex laminate is placed on the top of basal plate with certain angle, explosive is placed on the complex laminate top, in order to prevent that thin complex laminate from damaging, usually between explosive and complex laminate, fill up the buffer board of last layer metal or other material.Pass through explosive charge, produce one extremely strong impulsive force, make complex laminate produce extremely strong angular impact to basal plate, the interface that makes two plates of the energy foot of this collision produces metallurgical the connection, promptly the interface of two plates reaches interatomic combination, reaches the composite with certain shear strength.The compound advantage of exploding is to prepare difform composite, as compound slab, compound end socket, multiple tube or the like.

Hot rolling compound normally earlier with the composite surface of basal plate and complex laminate with suitable straight of machine-tooled method processing, keep clean; And the relative stack of the face that will process together, and welded perimeter vacuumizes then, seals the interface of two plates again, prevents to treat the surface oxidation of composite surface; After the sealing, the two superimposed plate that is superimposed sent in the heating furnace heat, after waiting to be incubated certain hour, carry out hot rolling, rolling roll-force (depressing power) and drafts can be determined according to the thickness of basal plate, complex laminate and final composite plate; After the hot rolling, superimposed plates promptly becomes required composite plate composite.

In above-mentioned two kinds of combination process, all be basal plate and complex laminate under required separately condition, both directly are composited, the centre does not add any scaling powder.

Technology contents

The object of the present invention is to provide a kind of stainless steel and steel composite brazing alloy and using method thereof, can quicken recombination process, improve the stainless steel composite brazing alloy of composite bond strength.

Chemical analysis of the present invention (weight %): Co:1.2～3.5%, Mn:2～4%, Ni:76～87%, Fe:1～2%, P:0.8～2%, B:1～2-3%, Cr:2～8%, W:0.5～1%, Si:05～1.8%, C:0.01～0.05%.This solder and brazing flux one, the recombination process that is used for stainless steel and various charcoal steel and low-alloy steel, thickness 0.01～the 0.05mm of solder, can clean stainless steel multilayer plate and carbon steel basal plate interface and carry out soldering (carrying out) being lower than under 400～500 ℃ of stainless steel and the charcoal steel fusing points in the space of blocking oxygen and pernicious gas, the fusing point of soldering rear interface layer improves 200～300 ℃, makes it to carry out hot rolling and at room temperature carry out cold rolling between 1000～1150 ℃ of hot rolling start rolling temperatures.

The present invention is mainly used in the recombination process of stainless steel and charcoal steel, low-alloy steel.Stainless steel clad plate has obtained widely applying, in recombination process, the solder paper tinsel that between basal plate and complex laminate, adds thickness 0.015～0.025mm, its objective is the fusing point that reduces both interfaces, the top layer is dissolved in the solder, is equivalent to produce " cleaning " effect, basal plate is directly contacted with pure surface with complex laminate on both surfaces, also directly contact with solder, improve mutual wetability; At high temperature, the solder of solid-state or molten state, can reduce the fusing point at basal plate and complex laminate interface, activated interfaces, quicken the diffusion velocity of interface atom, that is to say the atom counterdiffusion mutually on the interface that makes basal plate and complex laminate, both reach combination between atom, thereby improve the bond strength of complex greatly.

The combining form at both interfaces has the combination of solid solution build, the combination of intermetallic compound type and cocrystallizing type combination.

In order to satisfy technological requirement and to obtain high-quality composite plate or coiled composite, solder should satisfy following several requirements:

(1) should have good wettability, can fully fill up two slits between the interface;

(2) have appropriate melting point and flowability, quicken the atom diffusion between the interface, guarantee that both are in conjunction with firm.

(3) should have stable and uniform composition, under the high temperature compound condition, can not emanate because of the fusing of solder, steam poisonous element strongly can not volatilize or volatilize.

The mechanical performance at the interface after (4) compound and the technical performance requirement that physical property should satisfy monolithic composite panel or coiled composite.

The invention has the advantages that, can enlarge the output of two-sided stainless steel clad plate greatly, can reduce the import of China's nickel chromium triangle resource, improve the outlet amount of the two-sided stainless steel clad plate of China.The quality of the two-sided stainless steel clad plate of producing with the present invention is better than the various stainless steel clad plates of produced in conventional processes greatly.Its extensive application mainly based on saving the nickel chromium triangle resource, reduces production costs.

The specific embodiment

Chemical analysis scope according to the compound solder of stainless steel of the present invention has prepared three batches of solder chemical elements, is taken up in order of priority then and carries out founding and be processed into ultra-thin band through high-precision rolling mill at 10kg ultravacuum smelting furnace.The three batches of solders are respectively applied in the three reply plywood bases, and the kind and the size of three reply plywood bases are as shown in table 1, and the composite plate blanks after compound is as shown in table 2, has carried out performance test, its result:

Table 1 embodiment solder chemical analysis (weight %)

The element lot number	Co	Mn	Ni	Fe	P	W	B	Si	C	Cr
The element lot number	Co	Mn	Ni	Fe	P	W	B	Si	C	Cr	1	1.2	3.0	87	1.0	0.5		1.5	0.01	5.79
2	2	1.0	85	2.0		0.5	2.0		0.05	7.45	1	1.2	3.0	87	1.0	0.5		1.5	0.01	5.79
2	2	1.0	85	2.0		0.5	2.0		0.05	7.45	3	1.5	2.0	80	2.0	0.5	2.0		0.05	11.95

The slab size of table 2 embodiment soldering and solder consumption kg/m ²

Compound base lot number	Basal plate and size mm	Complex laminate and size	Solder consumption kg/m ²
Compound base lot number	Basal plate and size mm	Complex laminate and size	Solder consumption kg/m ²	1	Q195 steel plate 110 * 200 * 3000	SUS304 15×200×3000×2	0.3
2	Q235 110×500×3000	SUS304 15×500×3000×2	0.3	1	Q195 steel plate 110 * 200 * 3000	SUS304 15×200×3000×2	0.3
2	Q235 110×500×3000	SUS304 15×500×3000×2	0.3	3	Q195 20×1000×6000	SUS304 2×1000×6000	0.1

The performance of the compound back of table 3 embodiment composite plate blanks

The performance lot number	Shear strength MPa	180 ° of cold-bending property d=2b angle of bends	Intercrystalline corrosion	Surface quality
The performance lot number	Shear strength MPa	180 ° of cold-bending property d=2b angle of bends	Intercrystalline corrosion	Surface quality	1	360	Intact	Qualified	The surface is straight
2	360	Intact	Qualified	Surfacing	1	360	Intact	Qualified	The surface is straight
2	360	Intact	Qualified	Surfacing	3	360	Intact	Qualified	Surfacing

Claims

1, a kind of stainless steel and steel composite brazing alloy is characterized in that, chemical analysis is: Co:1.2～3.5%, Mn:2～4%, Ni:76～87%, Fe:1～2%, P:0.8～2%, B:1～2-3%, Cr:2～8%, W:0.5～1%, Si:05～1.8%, C:0.01～0.05%; All be weight percentage.

2, the using method of the described solder of a kind of claim 1, it is characterized in that, solder and brazing flux one, the recombination process that is used for stainless steel and charcoal steel and low-alloy steel, thickness 0.01～the 0.05mm of solder, soldering is carried out being lower than under 400～500 ℃ of stainless steel and the charcoal steel fusing points in cleaning stainless steel multilayer plate and carbon steel basal plate interface, and 200～300 ℃ of the fusing point raisings of soldering rear interface layer make it to carry out hot rolling and at room temperature carry out cold rolling between 1000～1150 ℃ of hot rolling start rolling temperatures.