Alloy material for ship valve and preparation method thereof

A technology of alloy materials and valves, which is applied in the field of alloy materials and preparation of ship valves, can solve problems such as inappropriateness, and achieve the effect of improving corrosion resistance and enhancing mechanical strength

Active Publication Date: 2014-12-03
ZHEJIANG IND & TRADE VACATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seawater corrosion resistance is good, but, as a pressure-resistant valve material, it is obviously not suitable

Method used

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  • Alloy material for ship valve and preparation method thereof
  • Alloy material for ship valve and preparation method thereof
  • Alloy material for ship valve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Composition of raw material parts by weight:

[0042] C: 0.27%, Mn: 0.08%, P: 0.03%, S: 0.02%, Si: 0.55%, Cu: 0.25%, Ni: 0.30%, Cr: 0.49%, Mo: 0.002%, V: 0.025%, La: 0.09%, Pb: 0.25%, As: 0.025%, Pr: 0.01%, Ce: 0.01%, Ga: 0.01%, Al: 0.02%, Zn: 0.01%, and the rest is Fe.

[0043] Preparation:

[0044] Step S10: Grinding C, Mn, P, S, Si, Cu, Ni, Cr, Mo, V, La, Pb, As, Pr, Ce, Ga, Al, Zn to be smelted into 14 μm powder.

[0045] Step S11: Melting C, Mn, P, S, and Fe at 1400° C. under vacuum conditions, and keeping the temperature for 30 minutes.

[0046] Step S12: Lower the temperature to 1200° C., stir and add Si and Cu 5 minutes later, then add Ni and Cr, and stir and keep warm for 25 minutes.

[0047] Step S13: Cool down to 1100°C and stir to add La, Pr, and Ce 10 minutes later, then add Mo, V, Pb, As, Ga, Al, and Zn, stir and keep warm for 50 minutes, and then cool to room temperature to obtain a finished alloy material.

Embodiment 2

[0049] Composition of raw material parts by weight:

[0050] C: 0.21%, Mn: 0.06%, P: 0.03%, S: 0.011%, Si: 0.50%, Cu: 0.21%, Ni: 0.01%, Cr: 0.48%, Mo: 0.001%, V: 0.02%, La: 0.08%, Pb: 0.21%, As: 0.011%, Pr: 0.01%, Ce: 0.01%, Ga: 0.01%, Al: 0.01%, Zn: 0.01%, and the rest is Fe.

[0051] Preparation:

[0052] Step S10: Grinding C, Mn, P, S, Si, Cu, Ni, Cr, Mo, V, La, Pb, As, Pr, Ce, Ga, Al, Zn to be smelted into 10 μm powder.

[0053] Step S11: Melting C, Mn, P, S, and Fe at 1300° C. under vacuum conditions, and keeping the temperature for 31 minutes.

[0054] Step S12: Lower the temperature to 1210° C., stir and add Si and Cu 6 minutes later, then add Ni and Cr, and stir and keep warm for 26 minutes.

[0055] Step S13: Cool down to 1110°C, stir and add La, Pr, Ce, then add Mo, V, Pb, As, Ga, Al, Zn 11 minutes later, stir and keep warm for 45 minutes, then cool to room temperature to obtain the finished alloy material.

Embodiment 3

[0057] Composition of raw material parts by weight:

[0058] C: 0.3%, Mn: 0.07%, P: 0.04%, S: 0.014%, Si: 0.60%, Cu: 0.30%, Ni: 0.50%, Cr: 0.50%, Mo: 0.002%, V: 0.03%, La: 0.10%, Pb: 0.30%, As: 0.045%, Pr: 0.02%, Ce: 0.02%, Ga: 0.02%, Al: 0.02%, Zn: 0.02%, and the rest is Fe.

[0059] Preparation:

[0060] Step S10: C, Mn, P, S, Si, Cu, Ni, Cr, Mo, V, La, Pb, As, Pr, Ce, Ga, Al, Zn to be smelted are pulverized into 11 μm powder.

[0061] Step S11: Melting C, Mn, P, S, and Fe at 1310° C. under vacuum conditions, and keeping the temperature for 32 minutes.

[0062] S12: Cool down to 1220° C., stir and add Si and Cu 7 minutes later, then add Ni and Cr, and stir for 27 minutes.

[0063] Step S13: Cool down to 1120°C and stir to add La, Pr, Ce 12 minutes later, add Mo, V, Pb, As, Ga, Al, Zn, stir and keep warm for 46 minutes, then cool to room temperature to obtain the finished alloy material.

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Abstract

The invention provides an alloy material for a ship valve. The alloy material comprises 0.21-0.3% of C, 0.06-1.0% of Mn, 0.03-0.04% of P, 0.011-0.045% of S, 0.50-0.60% of Si, 0.21-0.30% of Cu, 0.01-0.50%of Ni, 0.48-0.50% of Cr, 0.001-0.002% of Mo, 0.02-0.03% of V, 0.08-0.10% of La, 0.21-0.30% of Pb, 0.011-0.045% of As, 0.01-0.03% of Pr, 0.01-0.03% of Ce, 0.01-0.03 of Ga, 0.01-0.03% of Al, 0.01-0.03% of Zn and the balance of Fe. According to the alloy material prepared by the method, the mechanical strength of rolled steel is enhanced, the corrosion resistance of the rolled steel is greatly improved, and the alloy material has paramagnetism and meets the ocean operation requirements.

Description

technical field [0001] The invention belongs to the field of iron-based alloys, and in particular relates to an alloy material used for ship valves and a preparation method. Background technique [0002] The shipbuilding industry is the epitome of modern large-scale industry and a strategic industry related to national defense security and national economic development. The shipbuilding industry not only provides equipment for water transportation, energy transportation and ocean development, but also is the main supplier of naval ship equipment, and is also one of the strategic industries of national economy and national defense construction. Looking at it now, the shipbuilding industry will also become a pillar industry in our country. After more than 20 years of rapid development after reform and opening up, the shipbuilding industry has become one of the few export-oriented industries in my country with strong international competitiveness, and has become an important f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C33/04
Inventor 李晓星王文深
Owner ZHEJIANG IND & TRADE VACATIONAL COLLEGE
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