阅读说明：本技术 一种高耐用性镍铬电阻丝的制备工艺 (Preparation process of high-durability nickel-chromium resistance wire ) 是由 李晓佳 于 2019-10-28 设计创作，主要内容包括：本发明一种高耐用性镍铬电阻丝的制备工艺,包括以下步骤：S1、合金冶炼,将0.75-1.6份Si、18-24份Cr、32-38份Ni、36.4-49.25份Fe放入真空熔炉进行冶炼,得到合金铸锭；S2、对合金铸锭进行热锻方坯；S3、对方坯进行热轧加工,得到热轧盘圆条,圆条直径为8mm；S4、对圆条进行焊接并抛光；S5、利用模具对圆条进行第一次拉伸,得到直径为4mm的电阻丝；S6、对直径为4mm的电阻丝进行退火处理；S7、利用模具对直径为4mm电阻丝进行第二次拉伸；得到直径为1.5mm的镍铬电阻丝。本发明具有较高的使用温度和延伸率,能够避免电阻丝发生烧断的风险,增强耐用性。(The invention relates to a preparation process of a high-durability nickel-chromium resistance wire, which comprises the following steps: s1, alloy smelting, namely putting 0.75-1.6 parts of Si, 18-24 parts of Cr, 32-38 parts of Ni and 36.4-49.25 parts of Fe into a vacuum smelting furnace for smelting to obtain an alloy ingot; s2, hot forging the alloy ingot into a square billet; s3, carrying out hot rolling processing on the square billet to obtain a hot-rolled wire rod with the diameter of 8 mm; s4, welding and polishing the round bar; s5, stretching the round bar for the first time by using a die to obtain a resistance wire with the diameter of 4 mm; s6, annealing the resistance wire with the diameter of 4 mm; s7, performing secondary stretching on the resistance wire with the diameter of 4mm by using a die; obtaining the nickel-chromium resistance wire with the diameter of 1.5 mm. The invention has higher use temperature and elongation, can avoid the risk of the resistance wire being blown and enhances the durability.)

1. A preparation process of a high-durability nickel-chromium resistance wire is characterized by comprising the following steps:

s1, alloy smelting, namely putting 0.75-1.6 parts of Si, 18-24 parts of Cr, 32-38 parts of Ni and 36.4-49.25 parts of Fe into a vacuum smelting furnace for smelting to obtain an alloy ingot;

s2, hot forging the alloy ingot into a square billet;

s3, carrying out hot rolling processing on the square billet to obtain a hot-rolled wire rod with the diameter of 8 mm;

s4, welding and polishing the round bar;

s5, stretching the round bar for the first time by using a die to obtain a resistance wire with the diameter of 4 mm;

s6, annealing the resistance wire with the diameter of 4 mm;

s7, performing secondary stretching on the resistance wire with the diameter of 4mm by using a die; obtaining the nickel-chromium resistance wire with the diameter of 1.5 mm.

2. The process for preparing the high-durability nickel-chromium resistance wire according to claim 1, which is characterized in that: the smelting temperature of S1 is 1400 ℃ and 1500 ℃, and the smelting time is 50-70 min.

3. The process for preparing the high-durability nickel-chromium resistance wire according to claim 1, which is characterized in that: the hot rolling temperature of the S2 is 1200-1300 ℃.

4. The process for preparing the high-durability nickel-chromium resistance wire according to claim 1, which is characterized in that: the S6 is protected with hydrogen.

5. The process for preparing the high-durability nickel-chromium resistance wire according to claim 1, which is characterized in that: the annealing temperature of S6 is 1100-1200 ℃, and the temperature is kept for 1-2 h.

Technical Field

The invention relates to the field of electrothermal alloy, in particular to a preparation process of a high-durability nickel-chromium resistance wire.

Background

The electrothermal alloy is an alloy which uses the resistance characteristic of a substance to manufacture a heating body, and when current passes through the alloy element, joule effect is generated, and electric energy is converted into heat energy. The resistance wire is an important heating material in the industrial production process, and the service life of the resistance wire plays an important role in normal production. However, in the production process, the resistance wire is often burned off for various reasons, so that the production cannot be smoothly carried out.

Disclosure of Invention

The invention aims to provide a preparation process of a high-durability nickel-chromium resistance wire.

The invention realizes the purpose through the following technical scheme: a preparation process of a high-durability nickel-chromium resistance wire comprises the following steps:

s1, alloy smelting, namely putting 0.75-1.6 parts of Si, 18-24 parts of Cr, 32-38 parts of Ni and 36.4-49.25 parts of Fe into a vacuum smelting furnace for smelting to obtain an alloy ingot;

s2, hot forging the alloy ingot into a square billet;

s3, carrying out hot rolling processing on the square billet to obtain a hot-rolled wire rod with the diameter of 8 mm;

s4, welding and polishing the round bar;

s5, stretching the round bar for the first time by using a die to obtain a resistance wire with the diameter of 4 mm;

s6, annealing the resistance wire with the diameter of 4 mm;

s7, performing secondary stretching on the resistance wire with the diameter of 4mm by using a die; obtaining the nickel-chromium resistance wire with the diameter of 1.5 mm.

Furthermore, the smelting temperature of S1 is 1400-1500 ℃, and the smelting time is 50-70 min.

Further, the hot rolling temperature of the S2 is 1200-1300 ℃.

Further, the S6 is protected by hydrogen.

Further, the S6 annealing temperature is 1100-1200 ℃, and the temperature is kept for 1-2 h.

Compared with the prior art, the preparation process of the high-durability nickel-chromium resistance wire has the beneficial effects that: the high-strength steel wire has high use temperature and elongation, can avoid the risk of burning off the resistance wire, and enhances the durability.

Drawings

FIG. 1 is a flow chart of the present invention.

Detailed Description