阅读说明：本技术 一种自保护堆焊药芯焊丝 (Self-protection 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,特别涉及一种自保护堆焊药芯焊丝。一种自保护堆焊药芯焊丝,药芯包括以下重量百分比的化学成分：铬铁0.2～0.6％,硅铁0.4～0.8％,氮化铬2～3.5％、菱锌矿1～3％,氟化钠0.2～1.0％,钛酸钾0.2～1.5％,二氧化钛0.5～1.5％,锰铁0.8～1.8％,余量为铁,其中,氮占全部药粉重量的0.1～0.15％,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 self-protection surfacing flux-cored wire. A self-protection surfacing flux-cored wire comprises the following chemical components in percentage by weight: 0.2-0.6% of ferrochrome, 0.4-0.8% of ferrosilicon, 2-3.5% of chromium nitride, 1-3% of calamine, 0.2-1.0% of sodium fluoride, 0.2-1.5% of potassium titanate, 0.5-1.5% of titanium dioxide, 0.8-1.8% of ferromanganese, and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all powder, and the powder has good wear resistance and red hardness, and can prevent a surfacing layer from peeling off.)

1. The self-protection 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 ferrochrome, 0.4-0.8% of ferrosilicon, 2-3.5% of chromium nitride, 1-3% of calamine, 0.2-1.0% of sodium fluoride, 0.2-1.5% of potassium titanate, 0.5-1.5% of titanium dioxide, 0.8-1.8% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

2. The self-shielded flux-cored hardfacing wire of claim 1, wherein the flux core comprises the following chemical constituents in weight percent: 0.3-0.5% of ferrochrome, 0.5-0.6% of ferrosilicon, 2.5-2.8% of chromium nitride, 1-1.5% of calamine, 0.4-0.6% of sodium fluoride, 0.4-0.8% of potassium titanate, 0.5-1.5% of titanium dioxide, 1-1.5% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

3. The method for preparing the self-protecting surfacing flux-cored wire according to claim 1, wherein the flux core comprises the following chemical components in percentage by weight: 0.3% of ferrochromium, 0.5% of ferrosilicon, 2.8% of chromium nitride, 1.5% of calamine, 0.6% of sodium fluoride, 0.6% of potassium titanate, 1.5% of titanium dioxide, 1.5% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

4. The method for preparing the self-protecting surfacing flux-cored wire according to claim 1, wherein the flux core comprises the following chemical components in percentage by weight: 0.5% of ferrochromium, 0.6% of ferrosilicon, 2.5% of chromium nitride, 1% of calamine, 0.4% of sodium fluoride, 0.4% of potassium titanate, 0.5% of titanium dioxide, 1% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

5. The method for preparing the self-protecting surfacing flux-cored wire according to claim 1, wherein the flux core comprises the following chemical components in percentage by weight: 0.2% of ferrochromium, 0.8% of ferrosilicon, 3.5% of chromium nitride, 1% of calamine, 1.0% of sodium fluoride, 1.5% of potassium titanate, 0.5% of titanium dioxide, 1.8% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

6. The method for preparing the self-protecting surfacing flux-cored wire according to claim 1, wherein the flux core comprises the following chemical components in percentage by weight: 0.5% of ferrochromium, 0.4% of ferrosilicon, 2% of chromium nitride, 3% of calamine, 0.2% of sodium fluoride, 1.5% of potassium titanate, 1.5% of titanium dioxide, 0.8% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

Technical Field

The invention belongs to the technical field of surfacing materials, and particularly relates to a self-protection 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 currently widely used wear-resistant surfacing material contains ferrochrome and higher alloy elements, and mainly forms ferrochrome hard particles by using the ferrochrome, chromium, titanium, vanadium, niobium and the like to improve the hardness of metal of a surfacing layer so as to improve the wear resistance of the surfacing layer. However, the welding material has poor welding crack resistance and low toughness due to high ferrochrome content.

Disclosure of Invention

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

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

a self-protection surfacing flux-cored wire comprises the following chemical components in percentage by weight: 0.2-0.6% of ferrochrome, 0.4-0.8% of ferrosilicon, 2-3.5% of chromium nitride, 1-3% of calamine, 0.2-1.0% of sodium fluoride, 0.2-1.5% of potassium titanate, 0.5-1.5% of titanium dioxide, 0.8-1.8% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

In a preferred scheme, the self-protection surfacing flux-cored wire comprises the following chemical components in percentage by weight: 0.3-0.5% of ferrochrome, 0.5-0.6% of ferrosilicon, 2.5-2.8% of chromium nitride, 1-1.5% of calamine, 0.4-0.6% of sodium fluoride, 0.4-0.8% of potassium titanate, 0.5-1.5% of titanium dioxide, 1-1.5% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

In a preferred scheme, the self-protection surfacing flux-cored wire comprises the following chemical components in percentage by weight: 0.3% of ferrochromium, 0.5% of ferrosilicon, 2.8% of chromium nitride, 1.5% of calamine, 0.6% of sodium fluoride, 0.6% of potassium titanate, 1.5% of titanium dioxide, 1.5% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

In a preferred scheme, the self-protection surfacing flux-cored wire comprises the following chemical components in percentage by weight: 0.5% of ferrochromium, 0.6% of ferrosilicon, 2.5% of chromium nitride, 1% of calamine, 0.4% of sodium fluoride, 0.4% of potassium titanate, 0.5% of titanium dioxide, 1% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

In a preferred scheme, the self-protection surfacing flux-cored wire comprises the following chemical components in percentage by weight: 0.2% of ferrochromium, 0.8% of ferrosilicon, 3.5% of chromium nitride, 1% of calamine, 1.0% of sodium fluoride, 1.5% of potassium titanate, 0.5% of titanium dioxide, 1.8% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

In a preferred scheme, the self-protection surfacing flux-cored wire comprises the following chemical components in percentage by weight: 0.5% of ferrochromium, 0.4% of ferrosilicon, 2% of chromium nitride, 3% of calamine, 0.2% of sodium fluoride, 1.5% of potassium titanate, 1.5% of titanium dioxide, 0.8% of ferromanganese and the balance of iron, wherein nitrogen accounts for 0.1-0.15% of the weight of all medicinal powders.

The invention has the beneficial effects that:

1. the formula of the invention is reasonable, the invention adds ferrochrome, ferrosilicon, chromium nitride, calamine, titanium dioxide and ferromanganese for compounding use, and adds sodium fluoride, potassium titanate and other substances, and the surfacing layer metal with high hardness is obtained after cladding, and the surfacing layer metal has better wear resistance.

2. Cr plays a role in stabilizing the structure in the alloy structure and delays the growth of ferrochrome alloy particles.

3. The chromium nitride increases the nitrogen content in the deposited metal, replaces carbon with nitrogen, reduces the content of carbon in a weld joint, inevitably leads to the weakening of the strengthening effect of the surfacing metal along with the reduction of the carbon content, and the addition of the nitrogen well solves the problem. The nitrogen replaces carbon, so that the high-temperature oxidation resistance and corrosion resistance of the wear-resistant layer can be obviously improved, and the high-temperature wear resistance is obviously improved.

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.