阅读说明：本技术 一种2205双相钢的制造工艺方法 (Manufacturing process method of 2205 dual-phase steel ) 是由 彭安 于 2020-06-19 设计创作，主要内容包括：本发明涉及一种2205双相钢的制造工艺方法。包括以下步骤：将原料镍铁、铬铁、钼铁、低磷鉄及低碳铁放入到料筒内；通过行车将料筒吊至炉子大渣门上口处进料,导电进行电熔冶炼；温度达到1500摄氏度以上进行取样化验得到电炉钢水；将电炉钢水倒入精炼炉,取样光谱分析,加入0.5-2吨石灰,吹氧升温加入硅铁,进行取样清除杂质并进入精炼期,根据光谱分析结果,加入镍铁、铬铁、钼铁、低磷鉄及低碳铁进行元素微调,待达到2205双相钢化学成分要求即可出钢水；将钢水镇静进行浇注,浇注完成进行脱模,脱模完成即可获得2205双相钢。能够提高双相钢的屈服强度以及抗拉强度,无需反复进行热处理,有利于提高生产效率。(The invention relates to a manufacturing process method of 2205 dual-phase steel. The method comprises the following steps: putting raw materials of ferronickel, ferrochrome, ferromolybdenum, low-phosphorus iron and low-carbon iron into a charging barrel; hoisting the charging barrel to the upper opening of the slag door of the furnace by a travelling crane for feeding, and conducting electricity for electric smelting; sampling and testing at the temperature of more than 1500 ℃ to obtain electric furnace molten steel; pouring electric furnace molten steel into a refining furnace, sampling and carrying out spectral analysis, adding 0.5-2 tons of lime, blowing oxygen, raising the temperature, adding ferrosilicon, sampling, removing impurities and entering a refining period, adding ferronickel, ferrochrome, ferromolybdenum, low-phosphorus iron and low-carbon iron according to the spectral analysis result to carry out element fine adjustment, and discharging the molten steel when the chemical component requirement of 2205 dual-phase steel is met; and (3) the molten steel is calmed and poured, demoulding is carried out after the pouring is finished, and the 2205 dual-phase steel can be obtained after the demoulding is finished. The yield strength and the tensile strength of the dual-phase steel can be improved, repeated heat treatment is not needed, and the production efficiency is favorably improved.)

1. A manufacturing process method of 2205 dual-phase steel is characterized by comprising the following steps:

firstly, putting raw materials of ferronickel, ferrochrome, ferromolybdenum, low-phosphorus iron and low-carbon iron into a charging barrel;

secondly, checking the circulating water condition of the electric furnace to ensure that the circulating water inlet and outlet of the electric furnace are normal;

thirdly, hoisting the charging barrel to an upper mouth of a slag door of the furnace for feeding by a travelling crane, then electrifying for 3-20 minutes, adjusting the length of an electrode to be 5-10 to an electric conduction position, removing dust on the surface of the electrode, and then conducting for electric smelting;

fourthly, after the raw materials are completely melted, oxygen blowing and temperature rising are carried out, sampling and testing are carried out when the oxygen pressure is 5-35kg and the temperature reaches more than 1500 ℃, and the electric furnace molten steel can be obtained after the sampling and testing are qualified;

fifthly, checking the AOD refining furnace, entering a refining mode after ensuring that the equipment is normal, adjusting the air pressure to 0.2-1.5MPa before steel mixing, pouring molten steel of the electric furnace into the refining furnace, sampling and carrying out spectral analysis after pouring, removing impurities and carrying out temperature measurement, and keeping the temperature at 1450-1700 ℃; then, opening the gas to 5-15Kg, adding 0.5-2 tons of lime, blowing oxygen, heating to 1800 ℃ plus 1500 ℃, adding 2000Kg plus silicon iron, sampling, removing impurities, entering a refining period, adding ferronickel, ferrochrome, ferromolybdenum, low-phosphorus iron and low-carbon iron according to the result of spectral analysis to perform element fine adjustment, and when the requirement of 2205 dual-phase steel chemical components is met, discharging molten steel at the temperature of 1500 ℃ plus 1750 ℃;

and sixthly, the molten steel is calmed to 1400 ℃ and 1500 ℃ for pouring, the pouring is finished, the temperature is kept for more than 24 hours, demoulding is carried out, and the 2205 dual-phase steel can be obtained after demoulding is finished.

Technical Field

The invention relates to a manufacturing process method of 2205 dual-phase steel.

Background

Dual phase steels are also known as multiphase steels and are steels consisting of a two-phase structure of martensite, austenite or bainite and ferrite matrices. Generally, a steel having a ferrite-austenite phase structure is called a dual-phase stainless steel, and a steel having a ferrite-martensite phase structure is called a dual-phase steel. The dual-phase steel is obtained by heat treatment or controlled rolling of low-carbon steel or low-alloy high-strength steel in critical region. The existing dual-phase steel needs to be repeatedly subjected to heat treatment in the production process and is respectively used for forming different phase structures, and the production method has the defects of high energy consumption, long time consumption and influence on the production efficiency.

Disclosure of Invention

In view of the above-mentioned drawbacks, the present invention is directed to a manufacturing process of 2205 dual phase steel, which solves the problems set forth in the background art.

Therefore, the technical scheme adopted by the invention is as follows:

the method comprises the following steps:

firstly, putting raw materials of ferronickel, ferrochrome, ferromolybdenum, low-phosphorus iron and low-carbon iron into a charging barrel;

secondly, checking the circulating water condition of the electric furnace to ensure that the circulating water inlet and outlet of the electric furnace are normal;

thirdly, hoisting the charging barrel to an upper mouth of a slag door of the furnace for feeding by a travelling crane, then electrifying for 3-20 minutes, adjusting the length of an electrode to be 5-10 to an electric conduction position, removing dust on the surface of the electrode, and then conducting for electric smelting;

fourthly, after the raw materials are completely melted, oxygen blowing and temperature rising are carried out, sampling and testing are carried out when the oxygen pressure is 5-35kg and the temperature reaches more than 1500 ℃, and the electric furnace molten steel can be obtained after the sampling and testing are qualified;

fifthly, checking the AOD refining furnace, entering a refining mode after ensuring that the equipment is normal, adjusting the air pressure to 0.2-1.5MPa before steel mixing, pouring molten steel of the electric furnace into the refining furnace, sampling and carrying out spectral analysis after pouring, removing impurities and carrying out temperature measurement, and keeping the temperature at 1450-1700 ℃; then, opening the gas to 5-15Kg, adding 0.5-2 tons of lime, blowing oxygen, heating to 1800 ℃ plus 1500 ℃, adding 2000Kg plus silicon iron, sampling, removing impurities, entering a refining period, adding ferronickel, ferrochrome, ferromolybdenum, low-phosphorus iron and low-carbon iron according to the result of spectral analysis to perform element fine adjustment, and when the requirement of 2205 dual-phase steel chemical components is met, discharging molten steel at the temperature of 1500 ℃ plus 1750 ℃;

and sixthly, the molten steel is calmed to 1400 ℃ and 1500 ℃ for pouring, the pouring is finished, the temperature is kept for more than 24 hours, demoulding is carried out, and the 2205 dual-phase steel can be obtained after demoulding is finished.

The invention has the advantages that:

by adopting the process method, the yield strength and the tensile strength of the dual-phase steel can be improved, the process method is simple, repeated heat treatment is not needed, the energy consumption is low, the time consumption is short, and the production efficiency is favorably improved.

Detailed Description

A manufacturing process method of 2205 dual-phase steel comprises the following steps:

firstly, putting raw materials of ferronickel, ferrochrome, ferromolybdenum, low-phosphorus iron and low-carbon iron into a charging barrel;

secondly, checking the circulating water condition of the electric furnace to ensure that the circulating water inlet and outlet of the electric furnace are normal;

thirdly, hoisting the charging barrel to an upper mouth of a slag door of the furnace for feeding by a travelling crane, then electrifying for 3-20 minutes, adjusting the length of an electrode to be 5-10 to an electric conduction position, removing dust on the surface of the electrode, and then conducting for electric smelting;

fourthly, after the raw materials are completely melted, oxygen blowing and temperature rising are carried out, sampling and testing are carried out when the oxygen pressure is 5-35kg and the temperature reaches more than 1500 ℃, and the electric furnace molten steel can be obtained after the sampling and testing are qualified;

fifthly, checking the AOD refining furnace, entering a refining mode after ensuring that the equipment is normal, adjusting the air pressure to 0.2-1.5MPa before steel mixing, pouring molten steel of the electric furnace into the refining furnace, sampling and carrying out spectral analysis after pouring, removing impurities and carrying out temperature measurement, and keeping the temperature at 1450-1700 ℃; then, opening the gas to 5-15Kg, adding 0.5-2 tons of lime, blowing oxygen, heating to 1800 ℃ plus 1500 ℃, adding 2000Kg plus silicon iron, sampling, removing impurities, entering a refining period, adding ferronickel, ferrochrome, ferromolybdenum, low-phosphorus iron and low-carbon iron according to the result of spectral analysis to perform element fine adjustment, and when the requirement of 2205 dual-phase steel chemical components is met, discharging molten steel at the temperature of 1500 ℃ plus 1750 ℃;

and sixthly, the molten steel is calmed to 1400 ℃ and 1500 ℃ for pouring, the pouring is finished, the temperature is kept for more than 24 hours, demoulding is carried out, and the 2205 dual-phase steel can be obtained after demoulding is finished.

It is to be emphasized that: the above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.