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Micro-alloyed composite cored wire for wear-resistant steel

A technology of microalloying and cored wire, which is applied in the field of steelmaking additives, can solve problems such as long service life, large inclusions wear and fall off, and many precious metals, so as to reduce crack sources, improve mechanical properties, and improve material properties. Effect

Inactive Publication Date: 2016-08-24
HUBEI KMK WELDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a micro-alloyed composite cored wire for wear-resistant steel to solve the problem that the existing NM360 production process uses more precious metals, high cost, more harmful impurities, large inclusions, wear and tear, and stress in inclusions. There are technical problems such as the phenomenon of concentrated crack growth and the service life needs to be improved.

Method used

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  • Micro-alloyed composite cored wire for wear-resistant steel
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  • Micro-alloyed composite cored wire for wear-resistant steel

Examples

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Effect test

Embodiment 1

[0019] Example 1: Ca12%, Si45%, Mg1.5%, Ba1.5%, Zr2%, Ce1.37%, La0.75%, Nd0.13%, V0.2%, Al0. 01%, Ti.01%, B0.002% and pure iron are smelted and cast into ingots. The ingot is made into a wire with a diameter of 2mm by a wire drawing machine, and a layer of 0.1mm thick is wrapped around the wire by a wire wrapping machine. Low carbon steel skin, the finished cored wire is obtained.

Embodiment 2

[0020] Example 2: Ca13%, Si47.5%, Mg1.75%, Ba1.75%, Zr2.75%, Ce1.95%, La1.04%, Nd0.36%, V0.25 in an intermediate frequency furnace %, Al0.02%, Ti.02%, B0.003% and pure iron are smelted and cast into ingots. The ingot is made into a wire with a diameter of 2mm by a wire drawing machine, and a layer of wire is wrapped around the wire by a wire wrapping machine. 0.1mm thick low carbon steel skin, that is, the finished cored wire.

Embodiment 3

[0021] Example 3: Ca14%, Si50%, Mg2%, Ba2%, Zr3.5%, Ce2.6%, La1.4%, Nd0.6%, V0.3%, Al0.03% in an intermediate frequency furnace , Ti.03%, B0.004% and pure iron are smelted and cast into ingots, the ingots are made into metal wires with a diameter of 2mm by a wire drawing machine, and a layer of low carbon with a thickness of 0.1mm is wrapped around the wire by a wire wrapping machine. Steel and steel skin, the finished cored wire is obtained.

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Abstract

A micro-alloyed composite cored wire for wear-resistant steel, made of the following components by mass percentage: Ca12‑14%, Si45‑50%, Mg1.5‑2%, Ba1.5‑2%, Zr2‑3.5 %, Ce1.37‑2.6%, La0.75‑1.4%, Nd0.13‑0.6%, V0.2‑0.3%, Al0.01‑0.03%, Ti0.01‑0.03%, B0.002‑0.004% , and the balance is iron and unavoidable impurities. The present invention uses the micro-alloyed composite cored wire to replace the precious Ni element to smelt the wear-resistant steel. Compared with the existing technology, the addition of the composite cored wire improves the mechanical properties of the wear-resistant steel, so that the steel can obtain a higher Low relative mass wear amount and relative wear thickness refine grains and improve impact toughness and wear performance. The cerium, lanthanum, neodymium, calcium, magnesium, zirconium and other elements in the composite cored wire have a strong binding force with impurities such as oxygen and sulfur, which can purify the molten steel and reduce the source of cracks caused by the stress concentration of large inclusions , Improve the quality of steel. The invention improves the deficiencies in the production of the existing wear-resistant steel, and has good economic and social benefits.

Description

technical field [0001] The invention relates to a steelmaking additive, in particular to a microalloyed composite cored wire for wear-resistant steel. Background technique [0002] NM360 steel plate belongs to the series of wear-resistant steel plates, which are widely used in lining plates, blades, tooth plates, excavating heads and some bearing parts of mining machinery, coal mining machinery, environmental protection machinery, construction machinery, etc. NM360 wear-resistant steel is a new wear-resistant steel produced by adjusting the alloy composition on the basis of Q345 and adding a certain amount of micro-alloying elements. Compared with Q345, the mechanical properties and wear resistance of NM360 wear-resistant steel are greatly improved. The traditional process of producing NM360 is to add precious metal elements such as Ni to the steel plate material to toughen the matrix, which not only increases the cost, but also the wear-resistant steel obtained by the trad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/04
Inventor 樊川李志远
Owner HUBEI KMK WELDING MATERIALS
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