Gas shielded welding wire steel casting blank heating method and heating furnace

A heating method and gas shielded welding technology, applied in the field of heating furnace heating, can solve the problems of falling off, drawing and breaking, copper plating on the surface of the finished welding wire, etc.

Pending Publication Date: 2021-03-26
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a heating method and a heating furnace for gas-shielded welding wire steel billet, to solve the problem of drawing the billet of gas-shielded welding wire steel to make wire rod. Technical problems of fracture and copper plating peeling off on the surface of finished welding wire

Method used

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  • Gas shielded welding wire steel casting blank heating method and heating furnace
  • Gas shielded welding wire steel casting blank heating method and heating furnace
  • Gas shielded welding wire steel casting blank heating method and heating furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] The chemical composition mass percent of the gas-shielded welding wire steel slab used in Example 1 is: C: 0.07%, Si: 0.89%, Mn: 1.43%, P: 0.012%, S: 0.006%, and the balance is Fe and unavoidable Impurities. The size of the billet is 160mm×160mm×12000mm.

[0087] Furnace charging system: enter one empty one.

[0088] The heating process of the heating furnace is: the preheating temperature is the furnace temperature of 730°C, the preheating time is 8min, the temperature of the first stage of heating is 770°C, the heating time of the first stage of heating is 32min, the temperature of the second stage of heating is 990°C, and the heating time of the second stage of heating is 40min. The temperature of the soaking section is 1080°C, and the soaking time is 40 minutes. The total heating time is 120min.

[0089] Coke oven gas is used as fuel.

[0090] Residual oxygen content: 2-3%.

Embodiment 2

[0092] The mass percent of the chemical composition of the gas-shielded welding wire steel slab used in Example 2 is: C: 0.05%, Si: 0.80%, Mn: 1.46%, P: 0.014%, S: 0.015%, Ti: 0.19%, and the balance is Fe and unavoidable impurities. The size of the billet is 160mm×160mm×12000mm.

[0093] Furnace charging system: enter one empty two.

[0094] The heating process of the heating furnace is: the preheating temperature is 760°C, the preheating time is 6 minutes, the temperature of the first stage of heating is 790°C, the heating time of the first stage of heating is 24 minutes, the temperature of the second stage of heating is 990°C, and the heating time of the second stage of heating is 30 minutes. The temperature in the hot section is 1090°C, and the heating time in the soaking section is 30 minutes. The total heating time is 90min. The size of the billet is 160mm×160mm×12000mm.

[0095] Coke oven gas is used as fuel.

[0096] Residual oxygen content: 1-2.5%.

Embodiment 3

[0098] The chemical composition mass percent of the gas-shielded welding wire steel slab used in Example 3 is: C: 0.05%, Si: 0.77%, Mn: 1.46%, P: 0.012%, S: 0.015%, Ti: 0.20%, and the balance is Fe and unavoidable impurities. The size of the billet is 160mm×160mm×12000mm.

[0099] Furnace charging system: enter one empty two.

[0100] The heating process of the heating furnace is: the preheating temperature is 760°C, the preheating time is 5min, the temperature of the first stage of heating is 790°C, the heating time of the first stage of heating is 21min, the temperature of the second stage of heating is 1000°C, and the heating time of the second stage is 26min. The temperature in the hot section is 1110°C, and the heating time in the soaking section is 26 minutes. The total heating time is 78min.

[0101] Coke oven gas is used as fuel.

[0102] Residual oxygen content: 1-2.5%.

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Abstract

The invention provides a gas shielded welding wire steel casting blank heating method and a heating furnace. The method comprises the following steps: preheating and first heating are carried out on agas shielded welding wire steel casting blank with the mass fraction of Si being greater than or equal to 0.7% to obtain a first heated casting blank; the first heating casting blank is secondarily heated to the temperature smaller than or equal to 1000 DEG C within the time smaller than or equal to 60 min to obtain a second heating casting blank; and the second heating casting blank is subjectedto third heating within the time smaller than or equal to 60 min till the temperature is smaller than or equal to 1120 DEG C to finish heating of the gas shielded welding wire steel casting blank. According to the heating method provided by the invention, the embedding depth of the oxide scale of a produced wire rod does not exceed 25 microns, and the drawing fracture rate is less than or equal to 0.5 times / ton when the welding wire is manufactured by cold drawing, so that the wire rod has good processing performance, meanwhile, a copper plating layer is uniformly and firmly attached, and thewelding wire is ensured to have high surface quality.

Description

technical field [0001] The invention belongs to the technical field of heating furnaces, and in particular relates to a method for heating gas-shielded welding wire steel billets and a heating furnace. Background technique [0002] Gas-shielded welding wire steel is the raw material of gas-shielded welding wire. In order to ensure the quality of the weld after welding, such as strength and cleanliness, the gas-shielded welding wire steel contains a relatively high silicon content, which can reach 0.7-1.2%. The surface of the billet of gas-shielded welding wire steel will be oxidized during the heating process before rolling. [0003] The preparation process of the gas-shielded welding wire steel is to heat the billet and draw it to obtain a wire rod, then draw the wire rod to the specification of φ0.8~φ1.6mm, and then make the welding wire after copper plating on the surface. However, in the current technology, the problem of drawing fracture is prone to occur in the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C9/00B21C1/00B23K35/40
CPCB21C9/00B21C1/00B23K35/40
Inventor 陈涛孙齐松易敏徐兵伟黄昌洪罗洪金吕迺冰徐士新佟倩马跃罗志俊李舒笳
Owner SHOUGANG CORPORATION
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