High temperature Ni-Cr alloy and its production process

A nickel-chromium alloy and high-temperature-resistant technology, which is applied in the field of nickel-chromium alloy materials and its manufacturing, can solve the problems of unsatisfactory physical and chemical properties such as tensile strength and yield strength, and achieve the effects of comprehensive performance improvement, product grade improvement, and cost reduction

Inactive Publication Date: 2007-06-06
杭正奎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From an international point of view, the 803 alloy material sold by the American Heat Resistant Alloy International Company is a nickel-chromium alloy specially designed for use in petrochemical, chemical and thermal processing environments. Its melting point only reaches 1300 ° C, and Its physical and chemical properties such as tensile strength and yield strength are not ideal enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: The formula of high temperature resistant nickel-chromium alloy consists of: C: 0.1 (weight percent, the same below), Si: 0.5, Mn: 1.0, S: 0.014, Cr: 21, Ni: 58, Al: 1.0, Cu: 0.01, Fe is the balance.

[0022] After batching according to the above alloy components, smelting is carried out; the second step is secondary refining; the third step is thermal processing, first heated to 900 ° C, and after 40 minutes of heat preservation, forging is carried out; the fourth step is cold processing; Five steps, using water cooling for heat treatment.

Embodiment 2

[0023] Example 2: The formula of high temperature resistant nickel-chromium alloy consists of: C: 0.08 (weight percent, the same below), Si: 0.5, Mn: 1.0, S: 0.014, Cr: 25, Ni: 63, Al: 1.7, Cu: 0.99, Fe is the balance.

[0024] After batching according to the above alloy components, smelting is carried out; the second step is secondary refining; the third step is thermal processing, first heated to 1200 ° C, and after 10 minutes of heat preservation, forging is carried out; the fourth step is cold processing; Five steps, using water cooling for heat treatment.

Embodiment 3

[0025] Example 3: The formula of high temperature resistant nickel-chromium alloy consists of: C: 0.05 (weight percent, the same below), Si: 0.1, Mn: 0.3, S: 0.008, Cr: 23, Ni: 60, Al: 1.3, Cu: 0.5, Fe is the balance.

[0026] After batching according to the above alloy components, smelting is carried out; the second step is secondary refining; the third step is thermal processing, first heated to 950 ° C, and after 15 minutes of heat preservation, forging is carried out; the fourth step is cold processing; Five steps, using water cooling for heat treatment.

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Abstract

The present invention provides one kind of Ni-Cr alloy with high smelting point, capacity of bearing temperature of 1300 deg.c, high tensile strength and high yield strength and its production process. The Ni-Cr alloy contains C 0-0.1 wt%, Si 0-0.5 wt%, Mn 0-1.0 wt%, S 0-0.015 wt%, Cr 21-25 wt%, Ni 58-63 wt%, Al 1.0-1.7 wt%, Cu 0-1.0 wt%, and Fe for the rest. The production process includes the following steps: smelting, secondary refining, heating at 900-1200 deg.c for 10-40 min before forging, cold working and water cooling. The Ni-Cr alloy has raised heat resistance, high tensile strength, high yield strength and other advantages.

Description

technical field [0001] The invention relates to a nickel-chromium alloy material and a manufacturing method thereof, in particular to a high-temperature-resistant nickel-chromium alloy and a manufacturing method thereof. Background technique [0002] At present, ordinary high temperature resistant alloy materials such as CH1040, CH3030 and other materials have insufficient high temperature resistance, and can only work at temperatures between 600 ° C and 1200 ° C, and the time is not long, and the high temperature resistance and oxidation resistance are not enough. At present, common nickel-chromium alloy materials such as 2Cr13Ni13, 2Cr15Ni20, 1Cr16Ni25, etc. are not ideal for high temperature resistance. Even a series of high-resistance electrothermal alloys such as Cr20Ni80 can only be used at a maximum temperature of 1200 °C. Therefore, when the material needs to be used at a high temperature above 1200°C, such as when it is applied to large electric ovens, microwave ove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C1/02C22C1/06B21J1/06C22F1/00
Inventor 杭正奎
Owner 杭正奎
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