CN103394821A

CN103394821A - High-strength high-toughness wear-resistant welding rod reinforced with rare earth

Info

Publication number: CN103394821A
Application number: CN2013103022351A
Authority: CN
Inventors: 杨可
Original assignee: Changzhou Campus of Hohai University
Current assignee: Ger Sonre Changzhou Welding Technology Co ltd
Priority date: 2013-07-19
Filing date: 2013-07-19
Publication date: 2013-11-20
Anticipated expiration: 2033-07-19
Also published as: CN103394821B

Abstract

The invention discloses a high-strength high-toughness wear-resistant welding rod reinforced with rare earth, and belongs to the technical field of welding materials. The welding rod consists of a core wire and a coating, wherein the core wire is made of stainless steel, and the coating comprises, by weight, 15-35% of fluorite, 30-50% of marble, 3-10% of titanium dioxide, 3-8% of zirconite, 0-6% of potassium feldspar, 2-10% of rare earth silicon and 3-8% of ferromanganese. Since the coating is added with the rare earth silicon, welding processing property of the welding rod and toughness and crack resistance of metal of a surfacing layer are improved and wear resistance is further strengthened. The welding rod has the advantages of good welding processing property, high welding crack resistance, high pore resistance, high alloying uniformity degree and the like; the average rigidity of the surfacing layer is equal to HRC45-58 while the wear resistance value is 8-20 times of that of Q235 carbon steel.

Description

The high toughness wear resistant welding rod of rare earth reinforced

Technical field

The present invention relates to a kind of high toughness wear resistant welding rod of rare earth reinforced, belong to technical field of welding materials, this welding rod is widely used in the surface modification, composite manufacturing of the coal-grinding roller, engineering excavation machinery, mining machinery in roll, the thermal power plant of steel plant etc. and the aspect such as manufacturing again.

Background technology

Built-up welding is as the important branch in manufacturing engineering again, because can form typical metallurgical binding with mother metal, peeling off in overlay cladding process under arms is inclined to little and can be selected or the design hardfacing alloy according to the military service performance, make material or piece surface have the performances such as good wear-resisting, corrosion-resistant, high temperature resistant, radiation hardness, has very large flexibility on technique, wherein the wear resistance electrode built-up welding occupies an important position in reparation, composite manufacturing, is widely used in the aspects such as anti-wear performance that improve the mechanical engineering structure.

Rare earth element as a kind of activating agent can micro-solid solution in steel, purify crystal boundary, rotten field trash, crystallization of refinement tissue, thereby improve the mechanical performance of steel.Use for reference the effect of rare earth element in steel, be widely used in welding material.The defect such as high for present martensitic stain less steel hardfacing electrode carbon equivalent, that crack resistance is poor, toughness is lower, research and develop out a kind of high toughness wear resistant welding rod of rare earth reinforced, just becomes expectation in the industry.

Summary of the invention

The present invention is intended to according to the above theory, and a kind of high toughness wear resistant welding rod of rare earth reinforced is provided, and core wire is stainless steel, and its innovative point is, the component of electrode coating and the weight percentage of each component are:

Fluorite 15～35%

Marble 30～50%

Titanium dioxide 3～10%

Zircon 3～8%

Potassic feldspar 0～6%

Rare earth silicon 2～10%

Ferromanganese 3～8%

Above-described core wire,, according to the actual needs of engineering, can be common stainless steel, and the present invention preferably 1Cr13 or 2Cr13 martensitic stain less steel.

Wherein the effect of each component and content are as follows:

Fluorite: slag making and dehydrogenation, realize hydrogen controlled electrode, fully guarantee mechanical performance.Its weight percentage is 15～35%.

Marble: the effect of gas slag Combined Protection is played in gas making and slag making, butt welded seam.The proportioning of marble and fluorite is very important: the ratio of marble and fluorite is greater than 1 o'clock, arc stability, and spray power is large, splashes few.But greater than 3 the time, weld seam has dry slag to occur when the ratio of marble and fluorite, and take off slag bad, it is glassy that slag is, and quality is hard, even because the effect of removing hydrogen is not enough, makes face of weld that pore be arranged.Its weight percentage is 30～50%.

Titanium dioxide: add a small amount of titanium dioxide in hydrogen controlled electrode, make coating have good plasticity, to improve welding rod extrusion performance and welding technological properties.Its weight percentage is 3～10%.

Zircon: improve welding technological properties.Its weight percentage is 3～8%.

Potassic feldspar: slag making and stabilising arc.Its weight percentage is 0～6%.

Rare earth silicon: can play desulfating and deoxidation and change the inclusion morphology effect, improve toughness and crack resistance, strengthen anti-wear performance.Its weight percentage is 2～10%.

Ferromanganese: get rid of the oxygen in weld seam, increase intensity and the hardness of surfacing layer metal.Its weight percentage is: 3～8%.

The present invention utilizes rare earth to strengthen, and when improving the toughness of hardfacing alloy, crack resistance, improves hardness, increases anti-wear performance.Result of practical application shows, this welding rod bead-welding technology is functional, and anti-weld crack performance is high, overlay cladding average hardness HRC45-58, wearability be the Q235 carbon steel 8-20 doubly, and have the advantages such as the strong and alloying uniformity coefficient of anti-pore ability is good.

Description of drawings

Fig. 1 is a kind of concrete fabrication processing figure of the present invention.

The specific embodiment

Further illustrate scheme and the effect of invention below in conjunction with example.

Embodiment 1

Core wire: 1Cr13 martensitic stain less steel, diameter phi 3.2mm.

Coating recipe:

Fluorite 30%;

Marble 45%;

Titanium dioxide 5%;

Zircon 5%;

Potassic feldspar 5%;

Rare earth silicon 5%;

Ferromanganese 5%.

The preparation method is as shown in Figure 1: coating thickness 1.5-2.00mm wherein; Welding rod overlay cladding average hardness HRC48.

Embodiment 2

Core wire: 2Cr13 martensitic stain less steel, diameter phi 4mm.

Coating recipe:

Fluorite 30%;

Marble 45%;

Titanium dioxide 4%;

Zircon 5%;

Potassic feldspar 4%;

Rare earth silicon 7%;

Ferromanganese 5%.

The preparation method is with example 1

Coating thickness 1.5-2.00mm wherein; Welding rod overlay cladding average hardness HRC56.

Binding agent used is waterglass in above two examples, also can adopt subparticle shape clay or adopt white lime.And the diameter of described core wire is in φ 3-5mm scope.

Claims

1. the high toughness wear resistant welding rod of a rare earth reinforced, this welding rod be by the stainless steel core wire, and wrap up by binding agent the coating that dries up on the core wire surface and form, and it is characterized in that, the component of described coating and the weight percentage of each component are:

Fluorite 15～35%

Marble 30～50%

Titanium dioxide 3～10%

Zircon 3～8%

Potassic feldspar 0～6%

Rare earth silicon 2～10%

Ferromanganese 3～8%.

2. welding rod according to claim 1, is characterized in that, described core wire is 1Cr13 or 2Cr13 martensitic stain less steel, and its diameter is in φ 3～5mm scope.

3. welding rod according to claim 1, is characterized in that, described coating is by with after the binding agent wet-mixing becomes coating, through twisting of core wire and described coating, and then, through drying, cure and wrap up and dry up on the core wire surface, and the thickness of described coating is in 1.5～2.5mm scope.

4. according to claim 1 or 3 described welding rods, is characterized in that, described binding agent is waterglass, or clay, or white lime.