Production method capable of reducing electric welding spatter for wire rods for welding wires

Abstract

The invention discloses a production method capable of reducing electric welding spatter for wire rods for welding wires. Argon is blown from the bottom of a converter, a tapping end point control target is 0.04-0.06% of C, a tapping end point is less than or equal to 0.013% of P, and the tapping temperature is controlled to range from 1630 DEG C to 1670 DEG C; a molten steel deoxidizing agent and silicon manganese are adopted for deoxidizing alloy after a steel furnace, low-carbon ferromanganese, manganese metal and silicon iron are adopted for silicon manganese, 0-300 kg of lime is added into a steel ladle along with the alloy during steel tapping, the adding amount of the molten steel deoxidizing agent is 0.5-2.0 kg / t, the silicon iron is low-calcium silicon iron, the tapping target time t is larger than or equal to 5 min, the converter focuses on control over the component Si, Si is 0.73%-0.83%, Mn is 1.40%-1.47%, S is smaller than or equal to 0.035%, and the influence of the amount of supplemented silicon iron in refining on the component Ca is reduced; the finished product in the refining process comprises the following components in percentage by mass: 0.06-0.09% of C, 0.83-0.93% of Si, 1.47-1.57% of Mn, less than or equal to 0.020% of P, 0.005-0.015% of S and less than or equal to 0.0015% of Ca; the adding amount of the lime is controlled to be 200-600 kg, and the adding amount of the molten steel deoxidizing agent is 0-300 kg; the adding amount of the deoxidizing agent is adjusted according to the slag color, the deoxidizing agent is added in batches, the adding amount of each time is controlled to be within 100 kg, and the content of FeO + MnO in refining final slag is smaller than or equal to 1%.

Description

technical field [0001] The invention relates to a production method of a wire rod for welding wire which reduces electric welding spatter. Background technique [0002] CO 2 Gas shielded welding is an advanced welding technology, which has the advantages of low welding cost, high production efficiency and energy saving. With the sharp increase in the output of steel structures in my country, CO2 gas shielded welding is widely used, and the proportion in various welding is also increasing rapidly. According to market research, ER50-6 is the most widely used gas shielded welding wire in China according to the composition requirements in GB / T8110 2008 "Carbon Steel and Low Alloy Steel Welding Wires for Gas Shielded Arc Welding". But CO 2 The main disadvantage of gas shielded welding is the large metal spatter generated during welding. Welding spatter is one of the common problems in carbon dioxide gas shielded welding. During the welding process, most of the metal can trans...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of large ER50-6 welding spatter and adapt to the welding requirements of customers, after analyzing the chemical composition of the wire rod for ER50-6 welding wire, it was found that: under the same conditions of the user's welding process, the batch of ER50-6 welding spatter The secondary calcium element (Ca) is high, and the calcium element (Ca) of the ER50-6 batch with small welding spatter is low, see Table 1