Heat treatment process method of high-W reinforced high-temperature alloy bar

Abstract

The invention provides a heat treatment process method for a high-W reinforced high-temperature alloy bar. The heat treatment process method specifically comprises the steps of solution treatment, aging treatment and air cooling, wherein the temperature of the solution treatment is 1000-1200 DEG C, and the heat preservation time is 30-60 minutes; water cooling treatment is adopted after solid solution heat treatment; performing aging heat treatment: performing water cooling to 750-900 DEG C, and performing heat preservation for 3-5 hours; cooling to 600-800 DEG C, and keeping the temperature for 4-6 hours; and air-cooling to room temperature after aging heat treatment. The heat treatment process method for the high-W reinforced high-temperature alloy bar has the advantages that through a reasonable heat treatment system, on one hand, the use requirement of the alloy for strength is guaranteed, on the other hand, the type of a precipitated phase in the alloy is reasonably controlled, and the subsequent machinability of the alloy is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat treatment, in particular to a heat treatment process method of high W reinforced high-temperature alloy rod. BACKGROUND

[0002] At present, there are few reports on the research of high W reinforced deformed high-temperature alloy. The composition characteristics of the alloy are that the content of solid solution strengthening element W is very high, and the levels of Al, Ti and Nb are also high, so that the alloy is highly solid solution strengthened to the gamma matrix and gamma prime phase while precipitating a sufficient number of gamma prime phases, thereby the alloy obtains high thermal strength and improves the use temperature of the alloy. On the other hand, the addition of a large amount of W greatly increases the precipitation tendency of mu phase in the alloy, and the low carbon content and high Cr content in the alloy also promote this trend. The mu phase belongs to TCP phase, and its influence on the performance of the alloy is complex. Influenced by the two factors, the hot working performance of the alloy is deteriorated, and the deformation is difficult. SUMMARY

[0003] The purpose of the present application is to solve the problems in the background art. The present application provides a heat treatment process method of high W reinforced high-temperature alloy rod. The method controls the heat treatment temperature, holding time, cooling mode and the like, and obtains alloy rod with high batch quality stability.

[0004] The present application provides a heat treatment process method of high W reinforced high-temperature alloy rod, and the specific process is as follows: solid solution treatment + aging treatment + air cooling: Solid solution heat treatment: temperature 1000℃-1200℃, holding time 30 minutes-60 minutes; After the solid solution heat treatment, water cooling treatment is adopted; Aging heat treatment: water cooling to 750℃-900℃, holding for 3h-5h; cooling to 600℃-800℃, holding for 4h-6h; After the aging heat treatment, air cooling to room temperature is adopted.

[0005] Advantages of the present application: The present application provides a heat treatment process method of high W reinforced high-temperature alloy rod. Through reasonable heat treatment system, on the one hand, the use demand of the alloy for strength is ensured, and on the other hand, the type of precipitated phase in the alloy is reasonably controlled to ensure the machinability of the alloy. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 Tensile strength of finished rod after heat treatment of examples 1-3 (standard requirement 1330MPa); Figure 2 Elongation of finished rod after heat treatment of examples 1-3 (standard requirement 6%). DETAILED DESCRIPTION

[0007] The present application will be further explained with reference to the specific embodiments thereof, but the description herein given shall in no way be construed as a limitation on the present application, the structures, proportions, elements, materials, configurations and other details shown herein are by way of example only and are not intended to limit the scope of the application to the specific embodiments illustrated but rather the scope of the application is defined by the claims and equivalents thereto. Any modification, variation, substitution and / or alteration to the specific embodiments disclosed herein that are apparent to one of ordinary skill in the art or making the application or uses of the application obvious to others skilled in the art, are intended to be within the scope of the present application.

[0008] Example 1 The forged high W strengthened superalloy bar blank is heat treated at 1000 °C for 30 minutes, then quenched to 800 °C, held for 4 hours, then cooled to 750 °C, held for 4 hours, then air cooled to room temperature, resulting in the desired alloy bar.

[0009] Example 2 The forged high W strengthened superalloy bar blank is heat treated at 1100 °C for 60 minutes, then quenched to 750 °C, held for 5 hours, then cooled to 600 °C, held for 6 hours, then air cooled to room temperature, resulting in the desired alloy bar.

[0010] Example 3 The forged high W strengthened superalloy bar blank is heat treated at 1200 °C for 60 minutes, then quenched to 900 °C, held for 3 hours, then cooled to 800 °C, held for 6 hours, then air cooled to room temperature, resulting in the desired alloy bar.

[0011] Any matter not described herein is considered to be known.

[0012] While the embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Modifications, changes and substitutions can be made by those skilled in the art without departing from the spirit of the present application, which is defined by the claims hereinafter as interpreted in their broadest reasonable manner based on the present disclosure.

Claims

1. A heat treatment process for high-W strengthened high-temperature alloy bars, characterized in that: The specific process of the heat treatment method for the high-W strengthened high-temperature alloy bar is as follows: Solution treatment + aging treatment + air cooling: Solution heat treatment: temperature 1000℃~1200℃, holding time 30 minutes~60 minutes; Water cooling is applied after solution heat treatment; Aging heat treatment; After aging heat treatment, the mixture is air-cooled to room temperature.

2. The heat treatment process for high-W strengthened high-temperature alloy bars according to claim 1, characterized in that: In the solution heat treatment, the holding time is 30 to 60 minutes.

3. The heat treatment process for high-W strengthened high-temperature alloy bars according to claim 1, characterized in that: The aforementioned aging heat treatment involves water cooling to 750℃~900℃ and holding for 3h~5h; then cooling to 600℃~800℃ and holding for 4h~6h.

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