阅读说明：本技术 一种稀土强化堆焊药芯焊丝 (Rare earth reinforced surfacing flux-cored wire ) 是由 张轶 于 2018-08-13 设计创作，主要内容包括：本发明属于堆焊材料技术领域,特别涉及一种稀土强化堆焊药芯焊丝。一种稀土强化堆焊药芯焊丝,药芯包括以下重量百分比的化学成分：碳0.2～0.6％,硼铁0.4～0.8％,铬铁1～1.5％、钼铁1～3％,氟化钠0.2～1.0％,钛酸钾0.2～1.5％,钇基重稀土硅铁合金0.2～0.8％,锰铁0.8～1.8％,余量为铁,具有较好的磨损性能、红硬性,并能防止堆焊层的剥离。(The invention belongs to the technical field of surfacing materials, and particularly relates to a rare earth reinforced surfacing flux-cored wire. A rare earth reinforced surfacing flux-cored wire comprises the following chemical components in percentage by weight: 0.2-0.6% of carbon, 0.4-0.8% of ferroboron, 1-1.5% of ferrochrome, 1-3% of ferromolybdenum, 0.2-1.0% of sodium fluoride, 0.2-1.5% of potassium titanate, 0.2-0.8% of yttrium-based heavy rare earth ferrosilicon alloy, 0.8-1.8% of ferromanganese and the balance of iron, so that the surfacing layer has good wear resistance and red hardness, and can prevent the surfacing layer from peeling off.)

1. The rare earth reinforced surfacing flux-cored wire is characterized in that a flux core comprises the following chemical components in percentage by weight: 0.2-0.6% of carbon, 0.4-0.8% of ferroboron, 1-1.5% of ferrochrome, 1-3% of ferromolybdenum, 0.2-1.0% of sodium fluoride, 0.2-1.5% of potassium titanate, 0.2-0.8% of yttrium-based heavy rare earth ferrosilicon, 0.8-1.8% of ferromanganese and the balance of iron.

2. The rare earth reinforced surfacing flux-cored wire according to claim 1, wherein the flux core comprises the following chemical components in percentage by weight: 0.3-0.5% of carbon, 0.5-0.6% of ferroboron, 2.5-2.8% of ferrochrome, 1-1.5% of ferromolybdenum, 0.4-0.6% of sodium fluoride, 0.4-0.8% of potassium titanate, 0.4-0.6% of yttrium-based heavy rare earth ferrosilicon, 1-1.5% of ferromanganese and the balance of iron.

3. The rare earth reinforced surfacing flux-cored wire according to claim 1, wherein the flux core comprises the following chemical components in percentage by weight: 0.3% of carbon, 0.5% of ferroboron, 2.8% of ferrochrome, 1.5% of ferromolybdenum, 0.6% of sodium fluoride, 0.6% of potassium titanate, 0.4% of yttrium-based heavy rare earth ferrosilicon alloy, 1.5% of ferromanganese and the balance of iron.

4. The rare earth reinforced surfacing flux-cored wire according to claim 1, wherein the flux core comprises the following chemical components in percentage by weight: 0.5% of carbon, 0.6% of ferroboron, 2.5% of ferrochrome, 1% of ferromolybdenum, 0.4% of sodium fluoride, 0.4% of potassium titanate, 0.6% of yttrium-based heavy rare earth ferrosilicon alloy, 1% of ferromanganese and the balance of iron.

5. The rare earth reinforced surfacing flux-cored wire according to claim 1, wherein the flux core comprises the following chemical components in percentage by weight: 0.2% of carbon, 0.8% of ferroboron, 3.5% of ferrochrome, 1% of ferromolybdenum, 1.0% of sodium fluoride, 1.5% of potassium titanate, 0.2% of yttrium-based heavy rare earth ferrosilicon alloy, 1.8% of ferromanganese and the balance of iron.

6. The rare earth reinforced surfacing flux-cored wire according to claim 1, wherein the flux core comprises the following chemical components in percentage by weight: 0.5% of carbon, 0.4% of ferroboron, 2% of ferrochrome, 3% of ferromolybdenum, 0.2% of sodium fluoride, 1.5% of potassium titanate, 0.8% of yttrium-based heavy rare earth ferrosilicon alloy, 0.8% of ferromanganese and the balance of iron.

Technical Field

The invention belongs to the technical field of surfacing materials, and particularly relates to a rare earth reinforced surfacing flux-cored wire.

Background

Surfacing is an economical and rapid process method for modifying the surface of materials, and is increasingly widely applied to manufacturing and repairing parts in various industrial departments. In order to most effectively exert the function of the overlay layer, it is desired to adopt an overlay welding method having a small dilution of the base material, a high deposition rate, and excellent overlay performance, i.e., an overlay welding technique of high quality, high efficiency, and low dilution rate.

The existing commonly used hardfacing materials contain high carbon and alloy elements, and carbide hard particles are mainly formed by carbon and chromium, titanium, vanadium, niobium and the like to improve the hardness of metal of the hardfacing layer, so that the wear resistance of the hardfacing layer is improved. However, the welding material has poor welding crack resistance and low toughness due to high carbon content.

Disclosure of Invention

The invention aims to solve the technical problem of providing the rare earth reinforced surfacing flux-cored wire which has better wear resistance and red hardness and can prevent the surfacing layer from peeling.

In order to solve the technical problems, the invention adopts the following technical scheme:

a rare earth reinforced surfacing flux-cored wire comprises the following chemical components in percentage by weight: 0.2-0.6% of carbon, 0.4-0.8% of ferroboron, 1-1.5% of ferrochrome, 1-3% of ferromolybdenum, 0.2-1.0% of sodium fluoride, 0.2-1.5% of potassium titanate, 0.2-0.8% of yttrium-based heavy rare earth ferrosilicon, 0.8-1.8% of ferromanganese and the balance of iron.

In a preferred scheme, the flux-cored wire for rare earth reinforcement surfacing comprises the following chemical components in percentage by weight: 0.3-0.5% of carbon, 0.5-0.6% of ferroboron, 2.5-2.8% of ferrochrome, 1-1.5% of ferromolybdenum, 0.4-0.6% of sodium fluoride, 0.4-0.8% of potassium titanate, 0.4-0.6% of yttrium-based heavy rare earth ferrosilicon, 1-1.5% of ferromanganese and the balance of iron.

In a preferred scheme, the flux-cored wire for rare earth reinforcement surfacing comprises the following chemical components in percentage by weight: 0.3% of carbon, 0.5% of ferroboron, 2.8% of ferrochrome, 1.5% of ferromolybdenum, 0.6% of sodium fluoride, 0.6% of potassium titanate, 0.4% of yttrium-based heavy rare earth ferrosilicon alloy, 1.5% of ferromanganese and the balance of iron.

In a preferred scheme, the flux-cored wire for rare earth reinforcement surfacing comprises the following chemical components in percentage by weight: 0.5% of carbon, 0.6% of ferroboron, 2.5% of ferrochrome, 1% of ferromolybdenum, 0.4% of sodium fluoride, 0.4% of potassium titanate, 0.6% of yttrium-based heavy rare earth ferrosilicon alloy, 1% of ferromanganese and the balance of iron.

In a preferred scheme, the flux-cored wire for rare earth reinforcement surfacing comprises the following chemical components in percentage by weight: 0.2% of carbon, 0.8% of ferroboron, 3.5% of ferrochrome, 1% of ferromolybdenum, 1.0% of sodium fluoride, 1.5% of potassium titanate, 0.2% of yttrium-based heavy rare earth ferrosilicon alloy, 1.8% of ferromanganese and the balance of iron.

In a preferred scheme, the flux-cored wire for rare earth reinforcement surfacing comprises the following chemical components in percentage by weight: 0.5% of carbon, 0.4% of ferroboron, 2% of ferrochrome, 3% of ferromolybdenum, 0.2% of sodium fluoride, 1.5% of potassium titanate, 0.8% of yttrium-based heavy rare earth ferrosilicon alloy, 0.8% of ferromanganese and the balance of iron.

The invention has the beneficial effects that:

1. the formula of the invention is reasonable, the carbon, ferroboron, ferrochrome, ferromolybdenum, yttrium-based heavy rare earth ferrosilicon alloy and ferromanganese are added and compounded for use, and sodium fluoride, potassium titanate and other substances are added, and the surfacing layer metal with high hardness is obtained after cladding, so that the surfacing layer metal has better wear resistance.

2. Cr and C, Mo and C forming Cr₇C，Mo₇C, and Mo added into the high-hardness cubic carbide forms more carbides and composite carbides in a surfacing alloy structure, and the carbides are dispersed and distributed in a matrix structure to play a role in dispersion and distribution, further strengthen a welding line and have better red hardness.

3. Cr plays a role in stabilizing the structure in the alloy structure and delays the growth of carbide alloy particles.

4. Rare earth yttrium as a modifier is gradually popularized in the smelting industry, but is rarely applied in the welding material manufacturing industry. During the solidification of the molten pool, the rare earth yttrium element is firstly combined with the nonmetal element to be separated out, so that a grain core is formed, the separation of carbide and grains is induced, and the number of the grains in the unit volume of the surfacing metal is increased. Has strong effects of promoting carbide precipitation and refining grains, and has strong purification effect on grain boundaries. Plays a major role in inhibiting the tendency of cracks due to the addition of ferroboron to the core.

Detailed Description

The technical solutions in the examples are clearly and completely described below. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.