Anticorrosion high-strength alloy and smelting method thereof, as well as product of alloy and processing method of same

A high-strength alloy, corrosion-resistant technology, applied in the field of alloys, can solve problems such as short service life and poor corrosion resistance

Active Publication Date: 2009-09-09
SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing high-strength metal products have poor corrosion resistance and short service life. To solve this problem, the present invention firstly provides a corrosion-res...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment one smelting alloy

[0038] 1. Take the required chemical elements and vacuum melt them in a vacuum induction furnace. During the melting process, adjust the content of the elements so that the weight percentage is as follows:

[0039] Cr

Ni

co

Mo

Example 1

20

35

margin

9.47

Example 2

20.1

34.71

margin

9.61

Example 3

19.8

35.2

margin

10.03

Example 4

20.2

34.89

margin

10.06

Example 5

19.95

35.25

margin

9.95

[0040] And the content of impurity elements is controlled as low as possible, and the solution is cast into a consumable electrode by vacuum casting. The melting temperature is 1450±10°C, and the vacuum degree is ≤5Pa.

[0041] 2. The consumable electrode is remelted with binary slag in the electroslag remelting furnace, and the content of impurity elements is further reduced by e...

Embodiment 2

[0043] Embodiment 2 Making the electroslag ingot into a circular cross-section profile

[0044] 1). Hot forging the electroslag remelted ingot into a billet that is easy to roll, the heating temperature is 1100-1200 ℃, and the heat preservation is 7-10 hours;

[0045] 2). The billet is hot-rolled into a round cross-section bar, the heating temperature is 1100-1200 ℃, and the heat preservation is 7-10 hours;

[0046] 3). Cold-drawing the bar stock into a circular cross-section profile with the target diameter. When cold-drawing, the deformation of the material is controlled within the range of 30-70%. To obtain profiles with different strengths, the greater the deformation of the material, the higher the strength;

[0047] 4). Carry out aging heat treatment on the circular cross-section profile, and the treatment temperature is 550-680°C.

Embodiment 3

[0048] Example 3 Making the electroslag ingot into special-shaped cross-section profiles

[0049] 1). Hot forging the electroslag remelted ingot into a billet that is easy to roll, the heating temperature is 1150-1230 ℃, and the heat preservation is 7-10 hours;

[0050] 2). The billet is hot-rolled into a billet with a certain special-shaped cross-section, the heating temperature is 1150-1230 ° C, and the heat preservation is 7-10 hours;

[0051] 3).Use the special-shaped drawing die to draw the special-shaped cross-section blank into the target-sized special-shaped cross-section profile; when cold drawing, the deformation of the material is controlled within the range of 30-70%, and the profiles with different strengths are obtained. The greater the deformation of the material , the higher the intensity;

[0052] 4). The special-shaped cross-section profile is subjected to aging heat treatment, and the treatment temperature is 500-650°C.

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PUM

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Abstract

The invention discloses an anticorrosion high-strength alloy, consisting of the following elements in percentage by weight: 30 to 40 percent of Ni, 18 to 22 percent of Cr, 7 to 12 percent of Mo, and the balance of Co and unavoidable impurities. The content of the impurities has the following elements in percentage by weight: less than 0.05 percent of C, less than 0.20 percent of Si, less than 0.25 percent of Mn, less than 0.010 percent of S, less than 0.015 percent of P, less than 1.0 percent of Tim, and less than 2.0 percent of Fe. The smelting method comprises the following steps: 1) selecting the required chemical elements, smelting the elements in a vacuum inductance furnace, regulating the content of each element in the smelting process to ensure the weight of each element accords with the designing requirement, controlling the content of impurity elements as low as possible, and casting the alloy into a consumable electrode by a vacuum casting method; and 2) carrying out electroslag remelting on the consumable electrode to further reduce the content of impurity elements to ensure that the electrode accords with the designing requirement to obtain an electroslag remelt ingot with excellent quality. The alloy and the metal product manufactured by the corresponding process method have higher strength and excellent anticorrosion performance.

Description

technical field [0001] The invention relates to an alloy, in particular to a corrosion-resistant high-strength alloy. Products made of the alloy have ultra-high strength and good anti-corrosion performance, and are widely used in the fields of petroleum exploration, aerospace, medical equipment and the like. Background technique [0002] Some high-strength metal products, especially industrial high-strength fasteners, generally require the strength of the material to be greater than 260ksi. In most cases, the user unit will choose tool steel such as H11. However, in some corrosive environments, such as oil exploration, aerospace, etc., the service life of these tool steels will be greatly reduced due to their low corrosion resistance, and in severe cases, quality accidents may be caused by corrosion. The usual practice is to add a layer of corrosion-resistant coating on the surface of the product, but local corrosion conditions such as crevice corrosion can erode the coatin...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02B22D23/10B22D37/00C22F1/00B23P13/00B21C37/00B23P15/00B21J1/06B21J1/04B21B37/74
Inventor 罗明雷德江黄志永张华国高刚毅
Owner SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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