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Easily-drawing welding wire with high tensile rate and manufacturing method thereof

A high elongation, welding wire technology, applied in welding media, manufacturing tools, welding equipment, etc., can solve the problem of low tensile strength and yield strength, and achieve the effect of high tensile strength and yield strength

Active Publication Date: 2014-05-21
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high elongation and easy-drawn welding wire rod, which solves the problem of low tensile strength and yield strength of the current welding wire rod

Method used

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  • Easily-drawing welding wire with high tensile rate and manufacturing method thereof
  • Easily-drawing welding wire with high tensile rate and manufacturing method thereof
  • Easily-drawing welding wire with high tensile rate and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The composition of the continuous casting slab is: C=0.074%, Si=0.012, Mn=0.380, P=0.008, S=0.013, Cr=0.022%, Ni=0.030, Cu=0.035, the rest is Fe, the cross-sectional size of the slab It is 150mm×150mm. The heating system adopts three-stage continuous heating: the first heating section is 730°C; the second heating section is 910°C; the soaking section is 1030°C. The heating time is 95min. The steel billet starts rolling at 1010°C, and after 18 continuous rollings, it is rolled into a Φ6.5mm welding wire rod. The rolling speed is 85m / s, and the temperature of the wire rod after rolling is 950°C. The insulation cover is fully closed, and the speed of the roller table is increased step by step at 0.3-0.56m / s. The wire rods are bundled and collected after being cooled. The mechanical properties of welding wire rod are shown in Table 1. The average yield strength is 234Mpa, the average tensile strength is 334Mpa, the average elongation is 46.2%, and the average reduction ...

Embodiment 2

[0021] The composition of the continuous casting slab is: C=0.077%, Si=0.006, Mn=0.420, P=0.013, S=0.011, Cr=0.026%, Ni=0.036, Cu=0.036, the rest is Fe, the cross section of the slab The size is 150mm×150mm. The heating system adopts three-stage continuous heating: the first heating section is 730°C; the second heating section is 910°C; the soaking section is 1070°C. The heating time is 100min. The steel billet starts rolling at 1020°C, and after 18 consecutive rollings, it is rolled into a Φ6.5mm welding wire rod. The rolling speed is 85m / s, and the temperature of the wire rod after rolling is 1000°C. The insulation cover is fully closed, and the speed of the roller table is increased step by step at 0.3-0.56m / s. The wire rods are bundled and collected after being cooled. The mechanical properties of the wire rod are shown in Table 2. The average yield strength is 227Mpa, the average tensile strength is 336Mpa, the average elongation is 47.9%, and the average reduction of...

Embodiment 3

[0025] The composition of the continuous casting slab is: C=0.052%, Si=0.012, Mn=0.430, P=0.009, S=0.009, Cr=0.026%, Ni=0.036, Cu=0.034, the rest is Fe, the cross section of the slab The size is 150mm×150mm. The heating system adopts three-stage continuous heating: the first heating section is 730°C; the second heating section is 910°C; the soaking section is 1030°C. The heating time is 101min. The steel billet starts rolling at 1000°C, and after 18 consecutive rollings, it is rolled into a Φ6.5mm welding wire rod. The rolling speed is 85m / s, and the temperature of the wire rod after rolling is 900°C. The heat preservation cover is fully closed, and the speed of the roller table increases step by step at 0.3-0.56m / s. The wire rods are bundled and collected after being cooled. The mechanical properties of welding wire rod are shown in Table 3. The average yield strength is 233Mpa, the average tensile strength is 332Mpa, the average elongation is 46.7%, and the average reduc...

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Abstract

The invention discloses an easily-drawing welding wire with the high tensile rate and a manufacturing method thereof. The welding wire includes, by weight, carbon less than or equal to 0.08 percent, silicon less than or equal to 0.03 percent, manganese less than or equal to 0.38-0.50 percent, phosphorus less than or equal to 0.023 percent, sulphur less than or equal to 0.023 percent, chromium less than or equal to 0.20 percent, nickel less than or equal to 0.25 percent, copper less than or equal to 0.20 percent, and the balance ferrum. The manufacturing method of the easily-drawing welding wire with the high tensile rate includes the first step of selecting a continuous casting square billet without surface defects and filling the continuous casting square billet into a heating furnace for heating, wherein a three-stage continuous heating mode is adopted and a micro-oxidizing atmosphere is adopted in the furnace, the second step of heating the billet for more than 90 minutes, the third step of carrying out descaling on the billet through high-pressure water after the billet is heated and then rolling the billet, wherein the rolling temperature is 1020+ / -20 DEG C, and the billet is continuously rolled eighteen times to form a welding wire rod with a diameter of 6.5 millimeters, and the fourth step of conveying the billet into an air-cooled roller bed for cooling to obtain the easily-drawing welding wire with the high tensile rate. The easily-drawing welding wire has the advantage that the welding wire rod is high in tension strength and yield strength.

Description

technical field [0001] The invention belongs to the technical field of welding wire rod manufacturing, and relates to a high elongation easy-drawn welding wire rod and a manufacturing method thereof. Background technique [0002] The welding wire used for welding medium / low carbon steel is produced by drawing the welding wire rod, and its source is produced by the high-speed wire rod rolling mill in the rolling mill; the elongation refers to the elongation of the welding wire rod in the subsequent wire drawing process and the original length. percentage. The larger its value, the better the drawing performance. The area shrinkage refers to the percentage of the reduction of the cross-sectional area of ​​the wire rod after the tensile test and the original cross-sectional area. The larger the value, the better the plasticity and the better the drawing performance; The rolled wire rod can be drawn with smaller diameter wire due to "high elongation, high area reduction, lower...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3053B23K35/40
Inventor 陈永利周雪娇周书才
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY