阅读说明：本技术 高铬铸铁耐磨涂层的选择性堆焊方法及装置 (The selective overlaying method and device of rich chromium cast iron wear-resistant coating ) 是由 陈正 王振宇 沈承金 樊宇 陶庆 沈宝龙 于 2019-08-26 设计创作，主要内容包括：本发明公开了一种高铬铸铁耐磨涂层的选择性堆焊方法及装置,该方法为：将待焊母材置于循环水冷装置的铜管上表面,所述循环水冷装置包括铜管冷却装置和冷却循环系统,冷却循环系统设置有出水口和入水口,铜管的两端分别与冷却循环系统的出水口和入水口相连通；开启循环水冷装置,使冷却水在铜管和循环水冷装置间流通,将待焊母材置于铜管上,以待焊母材为基体,在其上表面进行高铬铸铁耐磨涂层的堆焊,堆焊过程中,待焊母材与冷却循环系统直接接触,控制高铬铸铁堆焊过程中堆焊层冷却速度和冷却时的散热方向进而控制碳化物的生长方向,使高铬铸铁耐磨涂层中主要耐磨相即碳化物垂直基体金属表面生长。本发明具有加工效果好,加工效率高等优点。(The invention discloses a kind of selective overlaying method of rich chromium cast iron wear-resistant coating and devices, this method are as follows: base material to be welded is placed in the copper pipe upper surface of water-circulating cooling device, the water-circulating cooling device includes copper pipe cooling device and cooling recirculation system, cooling recirculation system is provided with water outlet and water inlet, and the both ends of copper pipe are connected with the water outlet of cooling recirculation system and water inlet respectively；Open water-circulating cooling device, cooling water is set to circulate between copper pipe and water-circulating cooling device, base material to be welded is placed on copper pipe, using base material to be welded as matrix, surface carries out the built-up welding of rich chromium cast iron wear-resistant coating on it, in weld deposit process, base material to be welded is directly contacted with cooling recirculation system, control overlay cladding cooling velocity in rich chromium cast iron weld deposit process and it is cooling when heat dissipation direction so that control the direction of growth of carbide, grow the vertical base metal surface of main wear phase i.e. carbide in rich chromium cast iron wear-resistant coating.The present invention has many advantages, such as that processing effect is good, high in machining efficiency.)

1. a kind of selective overlaying method of rich chromium cast iron wear-resistant coating, it is characterised in that: the following steps are included:

(1) base material to be welded is placed in the copper pipe upper surface of water-circulating cooling device, the water-circulating cooling device includes the cooling dress of copper pipe It sets and cooling recirculation system, cooling recirculation system is provided with water outlet and water inlet, copper pipe cooling device includes copper pipe and support Part, the both ends of copper pipe are connected with the water outlet of cooling recirculation system and water inlet respectively, and copper pipe is set on support section Side；

(2) water-circulating cooling device is opened, so that cooling water is circulated between copper pipe and water-circulating cooling device, base material to be welded is placed in copper pipe On, using base material to be welded as matrix, surface carries out the built-up welding of rich chromium cast iron wear-resistant coating, in weld deposit process, base material to be welded on it It is directly contacted with cooling recirculation system, controls heat dissipation direction when overlay cladding cooling velocity and cooling in rich chromium cast iron weld deposit process And then the direction of growth of carbide is controlled, make the vertical parent metal table of main wear phase i.e. carbide in rich chromium cast iron wear-resistant coating It looks unfamiliar length.

2. the selective overlaying method of rich chromium cast iron wear-resistant coating according to claim 1, it is characterised in that: the step (2) in, fast cooling is carried out to matrix by the cooling water in copper pipe, in rich chromium cast iron wear-resistant coating forming process, vertically Face of weld formation temperature gradient, and then make the vertical base metal surface growth of carbide, carbide crystalline is perpendicular to matrix gold Metal surface growth, then its cross section is wear-resistant surface, and the interface of matrix and carbide is formed needed for crackle in friction process Stress concentration just becomes larger, and carbide non-breakable disengaging matrix in the base makes gained have the base of rich chromium cast iron wear-resistant coating The wearability of body improves.

3. a kind of water-circulating cooling device of the selective built-up welding for rich chromium cast iron wear-resistant coating, it is characterised in that: including copper pipe Cooling device and cooling recirculation system, cooling recirculation system are provided with water outlet and water inlet, and copper pipe cooling device includes copper pipe And support section, the both ends of copper pipe are connected with water outlet and water inlet respectively, copper pipe is set to above support section, on copper pipe Side is for placing base material to be welded, by the circulation of cooling water in cooling recirculation system and copper pipe, to rich chromium cast iron wear-resistant coating heap Base material to be welded during weldering carries out fast cooling.

4. the water-circulating cooling device of the selective built-up welding according to claim 3 for rich chromium cast iron wear-resistant coating, special Sign is: the copper pipe is made of multiple groups U-shaped copper pipe, and interlock headtotail, constitutes snakelike arrangement.

5. the water-circulating cooling device of the selective built-up welding according to claim 3 or 4 for rich chromium cast iron wear-resistant coating, Be characterized in that: it is rectangular copper pipe area that the copper pipe, which constitutes a surface,.

6. the water-circulating cooling device of the selective built-up welding according to claim 5 for rich chromium cast iron wear-resistant coating, special Sign is: the surface that the copper pipe is constituted is plane or irregular male and fomale(M&F).

7. the water-circulating cooling device of the selective built-up welding according to claim 3 for rich chromium cast iron wear-resistant coating, special Sign is: the support section includes supporting plate and bracket, and supporting plate is fixed on bracket, and copper pipe is arranged on supporting plate.

8. the water-circulating cooling device of the selective built-up welding according to claim 3 for rich chromium cast iron wear-resistant coating, special Sign is: the cooling recirculation system is cooling-water machine.

Technical field

The present invention relates to a kind of method and devices based on water-circulating cooling device built-up welding rich chromium cast iron wear-resistant coating, belong to weldering Connect technology field.

Background technique

Rich chromium cast iron is a kind of widely used hardfacing materials.Using the method for built-up welding on the steel plate of good toughness heap Rich chromium cast iron antifriction alloy is welded, not only can guarantee the strength of materials and toughness but also the wear-resisting property that can guarantee material surface.High chromium casting Iron is so have good wearability, mainly due to (Cr, Fe) containing high rigidity₇C₃Carbide.

During actual abrasive wear, there are mainly two types of the wear-out failure forms of carbide: peeling off and is cut. Therefore, if carbide crystalline perpendicular to base metal surface grow, cross section be wear-resistant surface, in friction process matrix with Stress needed for the interface of carbide forms crackle is concentrated just larger, and carbide non-breakable disengaging matrix in the base makes The wearability of alloy improves.Currently, the Carbide Phases direction of growth more zero of the rich chromium cast iron coating of wear-resisting workpiece surface overlaying Disorderly, for some perpendicular to base material surface, some is parallel to base material surface, oblique growth also.When workpiece works, it is parallel to matrix Metal surface grows carbide crystalline, then easily forms serious stress around it and concentrate, be easy carbide in wear process It is detached from matrix, polishing machine is caused to decline.Therefore, the wear-resisting workpiece service performance of existing built-up welding rich chromium cast iron is poor, the service life compared with It is short.

Summary of the invention

The purpose of the invention is in view of the deficiencies of the prior art, provide a kind of selectivity of rich chromium cast iron wear-resistant coating Overlaying method and device, to improve workpiece surface built-up welding rich chromium cast iron coating wear resistance.

To achieve the above object, the technical solution adopted by the present invention is that:

A kind of selective overlaying method of rich chromium cast iron wear-resistant coating, comprising the following steps:

(1) base material to be welded is placed in the copper pipe upper surface of water-circulating cooling device, the water-circulating cooling device includes that copper pipe is cold But device and cooling recirculation system, cooling recirculation system are provided with water outlet and water inlet, copper pipe cooling device include copper pipe and Support section, the both ends of copper pipe are connected with the water outlet of cooling recirculation system and water inlet respectively, and copper pipe is set to support portion Above point；

(2) water-circulating cooling device is opened, so that cooling water is circulated between copper pipe and water-circulating cooling device, base material to be welded is placed in On copper pipe, using base material to be welded as matrix, surface carries out the built-up welding of rich chromium cast iron wear-resistant coating on it, to be welded in weld deposit process Base material is directly contacted with cooling recirculation system, controls heat dissipation when overlay cladding cooling velocity and cooling in rich chromium cast iron weld deposit process Direction and then the direction of growth for controlling carbide keep the vertical matrix of main wear phase i.e. carbide in rich chromium cast iron wear-resistant coating golden Metal surface growth.

In the step (2), fast cooling is carried out to matrix by the cooling water in copper pipe, in rich chromium cast iron wear-resistant coating In forming process, vertical welding surface formation temperature gradient, and then make the vertical base metal surface growth of carbide, carbide is brilliant Body is grown perpendicular to base metal surface, then its cross section is wear-resistant surface, the interface of matrix and carbide in friction process The concentration of stress needed for forming crackle just becomes larger, carbide non-breakable disengaging matrix in the base, and gained is made to have the casting of high chromium The wearability of the matrix of iron wear-resistant coating improves.

A kind of water-circulating cooling device of the selective built-up welding for rich chromium cast iron wear-resistant coating, including copper pipe cooling device and Cooling recirculation system, cooling recirculation system are provided with water outlet and water inlet, and copper pipe cooling device includes copper pipe and support section, The both ends of copper pipe are connected with water outlet and water inlet respectively, and copper pipe is set to above support section, for placing above copper pipe Base material to be welded, by the circulation of cooling water in cooling recirculation system and copper pipe, in rich chromium cast iron wear-resistant coating weld deposit process Base material to be welded carries out fast cooling.

Further, the copper pipe is made of multiple groups U-shaped copper pipe, and interlock headtotail, constitutes snakelike arrangement.

Further, it is rectangular copper pipe area that the copper pipe, which constitutes a surface,.

Further, the surface that the copper pipe is constituted is plane or irregular male and fomale(M&F).

Further, the support section includes supporting plate and bracket, and supporting plate is fixed on bracket, and copper pipe is arranged in supporting plate On.

Further, the cooling recirculation system is cooling-water machine.Beneficial effects of the present invention are as follows:

The utility model has the advantages that method of the invention and related water-circulating cooling device structure are simple, processing cost is low, removes copper pipe Outside the simple moulding of palpus, other parts can be directly from market purchasing, it is easy to accomplish engineering application.The present invention can be used for a variety of shapes The rich chromium cast iron built-up welding of shape and various material workpiece.Cooling copper tube is directly contacted with base material to be welded in the present invention, with existing Gao Ge Cast-iron surfacing welding is compared, and improves rich chromium cast iron built-up welding cooling rate, and degree of supercooling increases when solidification, makes high hard carbon compound in overlay cladding It is grown perpendicular to base material surface orientation, forms coating relatively more resistant to abrasive wear.

Detailed description of the invention

Fig. 1 is the usage state diagram of the recirculated water cooling tooling for the built-up welding of rich chromium cast iron wear-resistant coating of the invention；

Fig. 2 is irregular base material and copper pipe assembling schematic diagram；

In figure: 1- cooling-water machine；2- base material to be welded；3- copper pipe；4- bracket；5- supporting plate.

Specific embodiment

Present invention will be further explained below with reference to the attached drawings and examples.

As shown in Figure 1, a kind of water-circulating cooling device of selective built-up welding for rich chromium cast iron wear-resistant coating of the invention, Including copper pipe cooling device and cooling recirculation system, cooling recirculation system is cooling-water machine 1, is provided with water outlet and water inlet, Copper pipe cooling device includes copper pipe 3 and support section, and support section includes supporting plate 5 and bracket 4, and supporting plate 5 is fixed on bracket 1, Copper pipe 3 is arranged on supporting plate 5；The both ends of copper pipe 3 are connected with water outlet and water inlet respectively, above copper pipe 3 for place to Base material 2 is welded, by the circulation of cooling water in cooling-water machine 1 and copper pipe 3, to the mother to be welded in rich chromium cast iron wear-resistant coating weld deposit process Material 2 carries out fast cooling.

Wherein, copper pipe is made of multiple groups U-shaped copper pipe, and interlock headtotail, constitutes snakelike arrangement.Copper pipe constitutes a table Face is rectangular copper pipe area.The surface that copper pipe is constituted is plane or irregular male and fomale(M&F), smooth to be welded to adapt to The rich chromium cast iron wear-resistant coating built-up welding of base material and irregular shape base material to be welded.Rich chromium cast iron suitable for irregular shape base material When built-up welding, the assembly of base material 2 and copper pipe 3 to be welded is as shown in Figure 2.

Wherein, copper pipe 3 is lifted by the support construction that supporting plate 5 and bracket 4 form, and plays supporting role in this way, effectively anti- The deformation of copper pipe Yu cooling-water machine interface is stopped.

The selective overlaying method of rich chromium cast iron wear-resistant coating of the invention are as follows:

Base material to be welded is placed in the copper pipe upper surface of water-circulating cooling device, opens cooling-water machine, makes cooling water in copper pipe and follows It circulates between ring water cooling plant, base material to be welded is placed on copper pipe, using base material to be welded as matrix, surface carries out rich chromium cast iron on it The built-up welding of wear-resistant coating in weld deposit process, carries out fast cooling to matrix by the cooling water in copper pipe, wear-resisting in rich chromium cast iron In coating forming procedure, vertical welding surface forms biggish temperature gradient, and then keeps the vertical base metal surface of carbide raw Long, carbide crystalline is grown perpendicular to base metal surface, then its cross section is wear-resistant surface, matrix and carbonization in friction process The concentration of stress needed for the interface of object forms crackle just becomes larger, and carbide non-breakable disengaging matrix in the base makes gained The wearability of matrix with rich chromium cast iron wear-resistant coating improves.

The basic principles, main features and advantages of the present invention have been shown and described above.The present invention can be with Have an other embodiments, all technical solutions formed using equivalent substitution or equivalent transformation, the present invention claims protection model Within enclosing.