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Casting method of high-strength high-hardness anti-marine-corrosion non-magnetic steel

A non-magnetic steel and high-hardness technology, which is applied in the field of preparation of marine corrosion-resistant and anti-magnetic steel for offshore oil exploration drilling vehicle drums, can solve the problem that the strength and wear resistance cannot meet the use requirements, and the corrosion resistance is insufficient Appearance quality and other issues

Inactive Publication Date: 2014-02-26
LESHAN LIDUN CAST STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength and wear resistance of this material cannot meet the requirements during use, especially when working in a marine environment, its corrosion resistance is significantly insufficient, which not only affects the appearance quality of the drum, but also greatly affects the quality of the drum. service life, leading to an increase in the replacement frequency of logging truck drums

Method used

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  • Casting method of high-strength high-hardness anti-marine-corrosion non-magnetic steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 1. Processing of anti-corrosion and anti-magnetic steel: Add steel scrap and pig iron into the melting furnace to heat up and melt. The melting furnace should be an intermediate frequency induction furnace. The melting temperature is generally around 1450°C-1550°C. Add nickel plate, ferromanganese, ferrochromium, ferromolybdenum, ferrovanadium and ferroniobium in sequence, and the diameter of the material block is preferably 50-80mm. The mass percentages of the above chemical components are controlled as follows: C: 0.30%, Si: 0.80%, Mn: 0.85%, Cr: 18.00%, Ni: 12.00%, Mo: 2.00%, V: 0.50%, Nb: 0.15%. After melting, when the furnace temperature reaches 1550-1580°C, deoxidation, dehydrogenation and denitrification are required. The deoxidizer is made of aluminum wire, Si-Ca alloy or SiC, and the deoxidizer is pressed into the depth of the furnace, and then ferrotitanium ( The diameter is preferably 3-5mm), Ti: 0.15%. At this time, the metal liquid surface is covered with a...

Embodiment 2

[0064] 1. Processing of anti-corrosion and anti-magnetic steel: Add steel scrap and pig iron into the melting furnace to heat up and melt. The melting furnace should be an intermediate frequency induction furnace. The melting temperature is generally around 1450°C-1550°C. Add nickel plate, ferromanganese, ferrochromium, ferromolybdenum, ferrovanadium and ferroniobium in sequence, and the diameter of the material block is preferably 50-80mm. The mass percentages of the above chemical components are controlled as follows: C: 0.28%, Si: 0.83%, Mn: 1.20%, Cr: 18.8%, Ni: 11.5%, Mo: 2.25%, V: 0.53%, Nb: 0.13%. After melting, when the furnace temperature reaches 1550-1580°C, deoxidation, dehydrogenation and denitrification are required. The deoxidizer is made of aluminum wire, Si-Ca alloy or SiC, and the deoxidizer is pressed into the depth of the furnace, and then ferrotitanium ( The diameter is preferably 3-5mm) Ti: 0.14%, the metal liquid surface is covered with a covering agent a...

Embodiment 3

[0069] 1. Processing of anti-corrosion and anti-magnetic steel: Add steel scrap and pig iron into the melting furnace to heat up and melt. The melting furnace should be an intermediate frequency induction furnace. The melting temperature is generally around 1450°C-1550°C. Add nickel plate, ferromanganese, ferrochromium, ferromolybdenum, ferrovanadium and ferroniobium in sequence, and the diameter of the material block is preferably 50-80mm. The mass percentages of the above chemical components are controlled as follows: C: 0.34%, Si: 0.90%, Mn: 1.45%, Cr: 17.4%, Ni: 12.8%, Mo: 2.45%, V: 0.48%, Nb: 0.12%. After melting, when the furnace temperature reaches 1550-1580°C, deoxidation, dehydrogenation, and denitrification are required. The deoxidizer is made of aluminum wire, Si-Ca alloy or SiC, and the deoxidizer is pressed into the depth of the furnace, and then ferrotitanium ( The diameter is preferably 3-5mm) Ti: 0.17%, the metal liquid surface is covered tightly with a coverin...

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Abstract

The invention discloses a casting method of high-strength high-hardness anti-marine-corrosion non-magnetic steel and belongs to the field of alloy materials. The method includes the steps of heating to melt raw iron in a smelter which is a medium-frequency induction furnace, at the melting temperature of 1450 DEG C-1550 DEG C, sequentially adding nickel, ferrochromium, ferrovanadium and ferroniobium into the smelter after full melting, controlling the content ratio of the element components to be satisfactory, melting down, performing deoxidation, dehydrogenation and denitrification when the furnace temperature reaches 1550 DEG C-1580 DEG C, pressuring deoxidant deep in the smelter, adding ferrotitanium, covering the surface of melt with covering agent to isolate external air, and adding rare-earth ferrosilicon into a ladle. The casting method is applied to novel non-magnetic steel which is non-magnetic, resistant to marine corrosion, and high in strength and hardness.

Description

technical field [0001] The invention belongs to the field of alloy material preparation, and in particular relates to materials for offshore oil exploration, in particular to the preparation of marine corrosion-resistant and anti-magnetic steel for offshore oil exploration drilling vehicle drums. Background technique [0002] At present, the rollers of oil industry logging trucks, logging skids and other equipment at home and abroad are all made of ZG3Mn19Cr4 non-magnetic steel. The smelting and processing technology of non-magnetic steel is very mature in China. However, the strength and wear resistance of this material cannot meet the requirements during use, especially when working in a marine environment, its corrosion resistance is significantly insufficient, which not only affects the appearance quality of the drum, but also greatly affects the quality of the drum. service life, leading to an increase in the replacement frequency of logging truck drums. Contents of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D1/00C22C33/04C21C7/00
Inventor 马玉川
Owner LESHAN LIDUN CAST STEEL
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