A wear-resistant and fold-resistant alloy heating wire and a preparation method thereof

Abstract

The present application relates to a kind of wear-resistant and fold-resistant alloy heating wire and its preparation method, belong to heating wire technical field.The present application uses modified adhesive as chelating material, and the micro powder such as chromium carbide, diamond is fixed on the surface of resistance wire bare wire, then composite is carried out through high-temperature sintering process, improve the wear resistance of surface layer of heating wire, comparable to electroplated wear-resistant layer, wherein, modified adhesive has branched phosphorus group, it has strong chelation with metal heating wire matrix and metal wear-resistant microparticle, wear-resistant microparticle is piled up in layers on the surface of heating wire matrix, then carbonization is carried out after high-temperature sintering, form stable wear-resistant layer, compared with wear-resistant coating with film-forming property, wear-resistant microparticle is tightly embedded in the surface layer of heating wire matrix Concave-convex structure through chelation, form dense structure, compared with electroplating, no toxic sewage is generated.

Description

Technical Field

[0001] This invention belongs to the field of heating wire technology, specifically, it relates to a wear-resistant and flexurally resistant alloy heating wire and its preparation method. Background Technology

[0002] Heating wires are made of resistance wires wound on glass fiber and insulated with PVC, silicone, or silicone + PVC double layers. They are widely used in household heating. With the development of technology and the research and development of various high-temperature resistant materials, resistance wires and high-temperature resistant materials are combined and heating wires are applied to industrial synthesis and other fields. The power and heat output of heating wires are constantly increasing, making the stability and safety of heating wires particularly important.

[0003] Ordinary heating wires are generally only coated with insulating varnish, resulting in limited wear resistance. During processing, winding, and laying, the resistance wires are easily entangled, damaged by impacts with the machine head, and bent during installation, all of which can lead to resistance wire protection failure. This is especially problematic at high power operation, increasing the risk of safety accidents. Existing treatment technologies include: 1. Applying wear-resistant coatings to the surface of the resistance wires. These coatings use polymeric adhesives as film-forming materials and improve wear resistance through wear-resistant ion doping. However, the bonding strength between the coating layer and the resistance wire substrate is not high, and the properties of the polymeric adhesives greatly limit the heat resistance temperature of the heating wire; 2. Electroplating a layer of wear-resistant material onto the surface of the resistance wire. Its biggest advantage is that the coating layer bonds well with the substrate and has no significant impact on the heat resistance temperature of the heating wire. However, electroplating generates a large amount of highly toxic and difficult-to-degrade wastewater. Therefore, this application aims to develop a wear-resistant and flexurally resistant alloy heating wire with a simple process and good performance, as well as its preparation method. Summary of the Invention

[0004] In order to solve the technical problems mentioned in the background art, the purpose of this invention is to provide a wear-resistant and flexural-resistant alloy heating wire and its preparation method.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A method for preparing a wear-resistant and flexurally resistant alloy heating wire specifically includes the following steps:

[0007] Step S1: Dissolve ethanol, rosin, polyethylene glycol and modified adhesive by stirring, then add surfactant and mix evenly. Then, while stirring, add chromium carbide alloy powder, copper powder and diamond micro powder in sequence and mix evenly to obtain wear-resistant coating.

[0008] Step S2: Clean the surface of the bare resistance wire, brush on the surface with wear-resistant coating, level it, dry and shape it to obtain the coated blank wire;

[0009] Step S3: Place the coated blank wire in a vacuum baking furnace and bake it at 220-250℃ for 40-60 minutes. Then, continue to heat it to 550-600℃ and dry distill it for 1.2-1.6 hours. After that, heat it to 900-960℃ and sinter it for 25-35 minutes. Cool it with the furnace to obtain a wear-resistant and fold-resistant alloy heating wire.

[0010] Furthermore, the ratio of modified adhesive, chromium carbide alloy powder, copper powder, diamond micro powder, surfactant, ethanol, rosin and polyethylene glycol is 10g:3.5-4.5g:0.8-1.1g:0.5-1g:1-2mL:20-25mL:5-8mL:3-5mL.

[0011] Furthermore, the fineness of the chromium carbide alloy powder, copper powder, and diamond micro powder is not less than 325 mesh.

[0012] The modified adhesive is prepared by the following method:

[0013] Step A1: Dissolve anhydrous ethanol and sodium ethoxide by stirring, then add diallyl sulfide and diethanolamine and mix. Set the stirring speed to 240-360 rpm, heat to 82-88℃ and reflux for 3-5 hours. After the reaction is completed, remove low-boiling substances by rotary evaporation to obtain intermediate 1.

[0014] Furthermore, the molar ratio of diallyl sulfide, diethanolamine, sodium ethoxide, and anhydrous ethanol is 0.1 mol : 0.21-0.22 mol : 0.2-0.3 g : 40-60 mL. The double bond of diallyl sulfide and the secondary amine of diethanolamine undergo nucleophilic addition catalyzed by sodium ethoxide. The specific reaction process is as follows:

[0015]

[0016] Step A2: Mix intermediate 1, hydroquinone, triethylamine and dioxane, set the stirring speed to 300-420 rpm, heat to 65-70℃, slowly add epichlorohydrin, control the overall reaction time to 1-1.5 h, then add caustic soda flakes and continue mixing for 15-20 min, filter the reaction solution, take the filtrate and remove low-boiling substances by rotary evaporation under reduced pressure to obtain intermediate 2;

[0017] Furthermore, the molar ratio of intermediate 1, epichlorohydrin, hydroquinone, triethylamine, dioxane, and caustic soda is 0.1 mol : 0.42-0.45 mol : 0.5-0.8 g : 4-6 mL : 45-55 mL : 2-4 g. Epichlorohydrin undergoes a ring-opening reaction with the hydroxyl group of intermediate 1, followed by ring-closure under caustic soda conditions. The specific reaction process is as follows:

[0018]

[0019] Step A3: Stir phosphoric acid and dimethyl sulfoxide at room temperature for 40-50 min, then set the stirring speed to 120-240 rpm and keep the temperature constant at 40-50℃. Slowly add the DMF solution of intermediate 2, control the overall reaction time to 2-3 h, and remove some low-boiling substances by rotary evaporation after the reaction is completed. Then add deionized water and rotary evaporate under reduced pressure several times to remove DMF and obtain the modified adhesive.

[0020] Furthermore, the ratio of intermediate 2, phosphoric acid, dimethyl sulfoxide, and DMF is 0.1 mol: 0.44-0.48 mol: 12-15 mL: 350-420 mL. The phosphoric acid reacts with the active epoxy group of intermediate 2, introducing a phosphorus-containing group to the molecule's end. The specific reaction process is as follows:

[0021]

[0022] The beneficial effects of this invention are:

[0023] 1. This invention provides a wear-resistant and bend-resistant treatment process for heating wires, using a modified adhesive as a chelating material to fix micro powders such as chromium carbide and diamond onto the surface of the bare resistance wire, and then performing a composite process through high-temperature sintering to improve the surface wear resistance of the heating wire, which is comparable to that of an electroplated wear-resistant layer.

[0024] 2. This invention prepares a modified adhesive using diallyl sulfide and diethanolamine as raw materials. The process involves nucleophilic addition catalyzed by sodium ethoxide, followed by modification with epichlorohydrin to enhance end activity, and finally modification with phosphoric acid. The resulting modified adhesive possesses branched phosphorus-containing groups, exhibiting strong chelating effects with both the metal heating wire substrate and the metal wear-resistant microparticles. The wear-resistant microparticles are layered onto the surface of the heating wire substrate, and then subjected to high-temperature sintering and carbonization to form a stable wear-resistant layer. Compared to coatings that form films of wear resistance, the wear-resistant microparticles are tightly embedded in the uneven surface structure of the heating wire substrate through chelation, forming a dense structure. The biggest advantage compared to electroplating is the absence of large amounts of toxic wastewater generated. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] This embodiment prepares a wear-resistant and flexural-resistant alloy heating wire, and the specific implementation process is as follows:

[0028] I. Preparation of Modified Adhesive

[0029] a1. Add anhydrous ethanol and sodium ethoxide to a reaction vessel and stir at 120 rpm to dissolve. Then add diallyl sulfide and diethanolamine and stir for 10 min. After that, set the stirring speed to 360 rpm, heat to 88℃ and reflux for 3 h. After the reaction is completed, remove anhydrous ethanol by rotary evaporation and purify to prepare intermediate 1. The ratio of diallyl sulfide, diethanolamine, sodium ethoxide and anhydrous ethanol is 0.1 mol: 0.22 mol: 0.3 g: 60 mL.

[0030] a2. Add intermediate 1, hydroquinone, triethylamine, and dioxane to a reaction vessel and stir at 300 rpm for 5 min. Then set the stirring speed to 420 rpm and heat to 70℃. Slowly and uniformly add epichlorohydrin over 30 min, controlling the overall reaction time to 1 h. Then add caustic soda and continue mixing for 15 min. Filter the reaction solution and remove triethylamine, dioxane, and excess epichlorohydrin and other low-boiling substances by rotary evaporation under reduced pressure to prepare intermediate 2. The ratio of intermediate 1, epichlorohydrin, hydroquinone, triethylamine, dioxane, and caustic soda is 0.1 mol: 0.45 mol: 0.8 g: 6 mL: 55 mL: 4 g.

[0031] a3. Add phosphoric acid and dimethyl sulfoxide to the reactor and stir at 240 rpm for 40 min at room temperature. Then, set the stirring speed to 240 rpm and maintain the temperature at 50℃. Dissolve intermediate 2 in DMF and slowly add the DMF solution of intermediate 2 dropwise to the reactor over 1 h. Control the overall reaction time to 2 h. After the reaction is completed, remove some low-boiling substances by rotary evaporation under reduced pressure. Then, add deionized water twice the mass of the rotary evaporation substrate and rotary evaporate under reduced pressure several times to remove DMF and obtain the modified adhesive. The ratio of intermediate 2, phosphoric acid, dimethyl sulfoxide and DMF is 0.1 mol: 0.48 mol: 15 mL: 420 mL.

[0032] II. Wear-resistant and flexurally resistant alloy heating wire

[0033] s1. Add ethanol, rosin, polyethylene glycol, and modified adhesive to a mixing tank and stir at 300 rpm to dissolve. Then add surfactant OP-10 and mix for 10 min. The following examples use the same raw materials. Then set the stirring speed to 60 rpm and add chromium carbide powder, copper powder, and diamond micro powder in sequence and mix for 30 min to make the powder uniform. The chromium carbide powder, copper powder, and diamond micro powder are provided by Shandong Elpai Powder Technology Co., Ltd. and have a fineness of 325 mesh. The wear-resistant coating is obtained. The ratio of modified adhesive, chromium carbide powder, copper powder, diamond micro powder, surfactant, ethanol, rosin, and polyethylene glycol is 10g:3.5g:1.1g:0.5g:1mL:25mL:5mL:3mL.

[0034] s2. Take bare resistance wire (provided by Shenhui Electrical Materials Co., Ltd., SENPHUS heating wire series bare wire, the same raw material is used in the following examples), wash it with 10% sodium carbonate solution at 50℃, clean it with deionized water, then soak it in 5% dilute hydrochloric acid, and finally wash it with clean water to clean the surface of the bare resistance wire. Then brush the wear-resistant coating onto the surface of the treated bare resistance wire, level it at room temperature for 5 minutes, and then place it in an 80℃ drying oven to dry for 30 minutes to set the coating and obtain the coated raw wire.

[0035] s3. Place the coated blank wire in a vacuum baking furnace, first bake it at 250℃ for 40 minutes, then continue to heat it to 550℃ for dry distillation for 1.6 hours, then heat it to 960℃ for sintering for 25 minutes, and cool it with the furnace to obtain a wear-resistant and fold-resistant alloy heating wire.

[0036] Example 2

[0037] This embodiment prepares a wear-resistant and flexural-resistant alloy heating wire, and the specific implementation process is as follows:

[0038] I. Preparation of Modified Adhesive

[0039] a1. Add anhydrous ethanol and sodium ethoxide to a reaction vessel and stir at 120 rpm to dissolve. Then add diallyl sulfide and diethanolamine and stir for 10 min. After that, set the stirring speed to 300 rpm and heat to 85℃ and reflux for 4 h. After the reaction is completed, remove the anhydrous ethanol by rotary evaporation and purify to prepare intermediate 1. The ratio of diallyl sulfide, diethanolamine, sodium ethoxide and anhydrous ethanol is 0.1 mol: 0.22 mol: 0.28 g: 50 mL.

[0040] a2. Add intermediate 1, hydroquinone, triethylamine, and dioxane to a reaction vessel and stir at 300 rpm for 5 min. Then set the stirring speed to 360 rpm and heat to 68℃. Slowly and uniformly add epichlorohydrin over 50 min, controlling the overall reaction time to 1.2 h. Then add caustic soda and continue mixing for 18 min. Filter the reaction solution and take the filtrate to remove triethylamine, dioxane, and excess epichlorohydrin and other low-boiling substances by rotary evaporation under reduced pressure to prepare intermediate 2. The ratio of intermediate 1, epichlorohydrin, hydroquinone, triethylamine, dioxane, and caustic soda is 0.1 mol: 0.43 mol: 0.75 g: 5.2 mL: 50 mL: 3.4 g.

[0041] a3. Add phosphoric acid and dimethyl sulfoxide to the reactor and stir at 240 rpm for 50 min at room temperature. Then, set the stirring speed to 240 rpm and maintain the temperature at 42℃. Dissolve intermediate 2 in DMF and slowly add the DMF solution of intermediate 2 dropwise to the reactor over 1 h. Control the overall reaction time to 1.8 h. After the reaction is completed, remove some low-boiling substances by rotary evaporation under reduced pressure. Then, add 1.8 times the mass of the rotary evaporation substrate in deionized water and rotary evaporate under reduced pressure several times to remove DMF and obtain the modified adhesive. The ratio of intermediate 2, phosphoric acid, dimethyl sulfoxide and DMF is 0.1 mol: 0.45 mol: 14 mL: 390 mL.

[0042] II. Wear-resistant and flexurally resistant alloy heating wire

[0043] s1. Add ethanol, rosin, polyethylene glycol and modified adhesive to a mixing tank, stir at 300 rpm to dissolve, then add surfactant and mix for 10 min. Then set the stirring speed to 60 rpm, add chromium carbide alloy powder, copper powder and diamond micro powder in sequence and mix for 30 min. Mix the powder evenly to obtain wear-resistant coating. The ratio of modified adhesive, chromium carbide alloy powder, copper powder, diamond micro powder, surfactant, ethanol, rosin and polyethylene glycol is 10g:4.2g:0.9g:0.7g:1.5mL:22mL:7mL:4.5mL.

[0044] s2. Take the bare resistance wire and wash it with 10% sodium carbonate solution at 50℃, rinse it with deionized water, then soak it in 5% dilute hydrochloric acid, and finally wash it with clean water to clean the surface of the bare resistance wire. Then brush the wear-resistant coating onto the surface of the treated bare resistance wire, level it at room temperature for 5 minutes, and then place it in an 80℃ drying oven to dry for 30 minutes to set the coating and obtain the coated raw wire.

[0045] s3. Place the coated blank wire in a vacuum baking furnace, first bake it at 230℃ for 45 minutes, then continue to heat it to 570℃ for dry distillation for 1.4 hours, then heat it to 940℃ for sintering for 30 minutes, and cool it with the furnace to obtain a wear-resistant and fold-resistant alloy heating wire.

[0046] Example 3

[0047] This embodiment prepares a wear-resistant and flexural-resistant alloy heating wire, and the specific implementation process is as follows:

[0048] I. Preparation of Modified Adhesive

[0049] a1. Add anhydrous ethanol and sodium ethoxide to a reaction vessel and stir at 120 rpm to dissolve. Then add diallyl sulfide and diethanolamine and stir for 10 min. After that, set the stirring speed to 240 rpm and reflux at 82℃ for 5 h. After the reaction is completed, remove the anhydrous ethanol by rotary evaporation and purify to prepare intermediate 1. The ratio of diallyl sulfide, diethanolamine, sodium ethoxide and anhydrous ethanol is 0.1 mol: 0.21 mol: 0.2 g: 40 mL.

[0050] a2. Add intermediate 1, hydroquinone, triethylamine, and dioxane to a reaction vessel and stir at 300 rpm for 5 min. Then, set the stirring speed to 300 rpm and heat to 65℃. Slowly and uniformly add epichlorohydrin over 1 h, controlling the overall reaction time to 1.5 h. Then, add caustic soda and continue mixing for 20 min. Filter the reaction solution and remove triethylamine, dioxane, and excess epichlorohydrin and other low-boiling substances by rotary evaporation under reduced pressure to prepare intermediate 2. The ratio of intermediate 1, epichlorohydrin, hydroquinone, triethylamine, dioxane, and caustic soda is 0.1 mol: 0.42 mol: 0.5 g: 4 mL: 45 mL: 2 g.

[0051] a3. Add phosphoric acid and dimethyl sulfoxide to the reactor and stir at 240 rpm for 50 min at room temperature. Then set the stirring speed to 120 rpm and keep the temperature constant at 40℃. Dissolve intermediate 2 in DMF and slowly add the DMF solution of intermediate 2 dropwise to the reactor over 1 h. Control the overall reaction time to 3 h. After the reaction is completed, remove some low-boiling substances by rotary evaporation under reduced pressure. Then add 1.5 times the mass of the rotary evaporation substrate in deionized water and rotary evaporate under reduced pressure several times to remove DMF and obtain the modified adhesive. The ratio of intermediate 2, phosphoric acid, dimethyl sulfoxide and DMF is 0.1 mol: 0.44 mol: 12 mL: 350 mL.

[0052] II. Wear-resistant and flexurally resistant alloy heating wire

[0053] s1. Add ethanol, rosin, polyethylene glycol and modified adhesive to a mixing tank, stir at 300 rpm to dissolve, then add surfactant and mix for 10 min. Then set the stirring speed to 60 rpm, add chromium carbide alloy powder, copper powder and diamond micro powder in sequence and mix for 30 min. Mix the powder evenly to obtain wear-resistant coating. The ratio of modified adhesive, chromium carbide alloy powder, copper powder, diamond micro powder, surfactant, ethanol, rosin and polyethylene glycol is 10g:4.5g:0.8g:1g:2mL:20mL:8mL:5mL.

[0054] s2. Take the bare resistance wire, wash it with 10% sodium carbonate solution at 50℃, rinse it with deionized water, then soak it in 5% dilute hydrochloric acid, and finally wash it with clean water to clean the surface of the bare resistance wire. Then brush the wear-resistant coating onto the surface of the treated bare resistance wire, level it at room temperature for 5 minutes, and then place it in an 80℃ drying oven to dry for 30 minutes to set the coating and obtain the coated raw wire.

[0055] s3. Place the coated blank wire in a vacuum baking furnace, first bake it at 220℃ for 60 minutes, then continue to heat it to 600℃ for dry distillation for 1.2 hours, then heat it to 900℃ for sintering for 35 minutes, and cool it with the furnace to obtain a wear-resistant and fold-resistant alloy heating wire.

[0056] To facilitate verification of the wear resistance of the prepared heating wire, a bare resistance wire was cold-rolled into a base sample with a size of 20*20*2mm. Samples were prepared according to the methods provided in Examples 1-3, and were respectively denoted as Sample 1-Sample 3. At the same time, a set of untreated blank control was set up.

[0057] The wear resistance of the sample surface was tested using an MLD-10 dynamic load abrasive wear tester. The abrasive particles were 100-mesh quartz sand, the abrasive flow rate was 200 g / min, the rotating grinding shaft was made of GCr15 bearing steel, the rotation speed was 300 rpm, and the wear time was 30 min. The wear resistance was judged by calculating the mass loss.

[0058] The specific test data is shown in Table 1:

[0059] Table 1

[0060] Wear amount / mg 37.1 29.8 34.6 118.3

[0061] As can be seen from the data comparison in Table 1, the wear resistance of the surface layer of the heating wire prepared by the present invention is much higher than that of the heating wire body, and the surface wear resistance is comparable to that of existing electroplated wear-resistant layers.

[0062] To verify the adhesion of the wear-resistant layer, a 2mm round bar was used as the test surface in accordance with GB / T9286-2020. Bending tests were conducted on the heating wires prepared in Examples 1-3, with bending angles of 60°, 90°, and 150°, and a bending rate of 10 times / min, until the surface layer began to peel off. The number of bends was recorded. Specific test data are shown in Table 2.

[0063] Table 2

[0064] Number of bends (60°) / time 214 227 203 Number of bends (90°) / time 143 138 131 Number of bends (150°) / time 85 71 69

[0065] As shown in Table 2, the heating wire prepared by this invention has stable bending resistance. Under a 150° bend, it can withstand 69-85 bends, which meets the requirements for the assembly and laying of the heating wire.

[0066] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A method for preparing a wear-resistant and flexurally resistant alloy heating wire, characterized in that, Specifically, the following procedures are included: Step S1: Dissolve ethanol, rosin, polyethylene glycol and modified adhesive, add surfactant and mix, then add chromium carbide alloy powder, copper powder and diamond micro powder in sequence while stirring to obtain wear-resistant coating; Step S2: Clean the surface of the bare resistance wire, brush on the surface with wear-resistant coating, level it, dry and shape it to obtain the coated blank wire; Step S3: Place the coated blank wire in a vacuum baking furnace and bake it at 220-250℃ for 40-60 minutes. Then, continue to heat it to 550-600℃ and dry distill it for 1.2-1.6 hours. After that, heat it to 900-960℃ and sinter it for 25-35 minutes. Cool it with the furnace to obtain a wear-resistant and fold-resistant alloy heating wire. The modified adhesive is prepared by the following method: Step A1: Dissolve anhydrous ethanol and sodium ethoxide, add diallyl sulfide and diethanolamine and mix. Set the stirring speed to 240-360 rpm, heat to 82-88℃ and reflux for 3-5 h. After the reaction is completed, remove low-boiling substances by rotary evaporation to obtain intermediate 1. Step A2: Mix intermediate 1, hydroquinone, triethylamine and dioxane, set the stirring speed to 300-420 rpm, heat to 65-70℃, add epichlorohydrin dropwise, control the overall reaction time to 1-1.5 h, then add caustic soda flakes and continue mixing for 15-20 min, filter the reaction solution, take the filtrate and remove low-boiling substances by rotary evaporation under reduced pressure to obtain intermediate 2; Step A3: Stir phosphoric acid and dimethyl sulfoxide at room temperature for 40-50 min, then set the stirring speed to 120-240 rpm and keep the temperature constant at 40-50℃. Add the DMF solution of intermediate 2 dropwise, control the overall reaction time to 2-3 h, remove some low-boiling substances by rotary evaporation after the reaction is completed, add deionized water and rotary evaporate under reduced pressure several times to remove DMF and obtain the modified adhesive. The ratio of diallyl sulfide, diethanolamine, sodium ethoxide, and anhydrous ethanol is 0.1 mol: 0.21-0.22 mol: 0.2-0.3 g: 40-60 mL; The ratio of intermediate 1, epichlorohydrin, hydroquinone, triethylamine, dioxane, and caustic soda flakes is 0.1 mol: 0.42-0.45 mol: 0.5-0.8 g: 4-6 mL: 45-55 mL: 2-4 g; The ratio of intermediate 2, phosphoric acid, dimethyl sulfoxide and DMF is 0.1 mol: 0.44-0.48 mol: 12-15 mL: 350-420 mL; The ratio of modified adhesive, chromium carbide alloy powder, copper powder, diamond micro powder, surfactant, ethanol, rosin and polyethylene glycol is 10g: 3.5-4.5g: 0.8-1.1g: 0.5-1g: 1-2mL: 20-25mL: 5-8mL: 3-5mL.

2. The method for preparing a wear-resistant and flexurally resistant alloy heating wire according to claim 1, characterized in that, The fineness of chromium carbide alloy powder, copper powder, and diamond micro powder shall not be less than 325 mesh.

3. A wear-resistant and flexurally resistant alloy heating wire, characterized in that, It is prepared by the preparation method according to any one of claims 1-2.

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