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Homogenization treatment process of S31254 super austenitic stainless steel

An austenitic stainless steel and homogenization treatment technology, which is applied in the field of metal forging, can solve the problems of not meeting the requirements of use and easy non-compatibility, etc., and achieve the effects of less time consumption, inhibition of growth, and guaranteed diffusion effect

Pending Publication Date: 2021-12-03
AVIC SHANGDA METAL REGENERATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of Cr, Ni and Mo elements in S31254 super austenitic stainless steel is relatively high. At present, it is produced by one-time smelting process, but the primary precipitation phase of the produced S31254 bar is very easy to be inconsistent, especially the radius and center position of the bar. Can not meet the use requirements

Method used

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  • Homogenization treatment process of S31254 super austenitic stainless steel
  • Homogenization treatment process of S31254 super austenitic stainless steel
  • Homogenization treatment process of S31254 super austenitic stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A homogenization treatment process for S31254 super austenitic stainless steel, specifically comprising the following steps:

[0030] Step 1: Heat a 19-inch S31254 steel ingot to 800°C and keep it warm for 2 hours to make the core temperature of the steel ingot consistent with the external temperature. The internal temperature is consistent with the external temperature, and the steel ingot is evenly heated through to obtain a heat-through steel ingot;

[0031] Step 2: Heat the heat-through steel ingot to 1260°C and keep it for 20 hours. After it is released from the furnace, the released steel ingot is obtained. Keep warm for 20 hours.

Embodiment 2

[0033] A homogenization treatment process for S31254 super austenitic stainless steel, specifically comprising the following steps:

[0034] Step 1: Heat a 19-inch S31254 steel ingot to 750°C, keep it warm for 2 hours to make the core temperature of the steel ingot consistent with the external temperature, and the steel ingot is evenly heated, then raise the temperature to 1150°C at a heating rate of 220°C / h, and hold it for 1.5 hours to make the steel ingot The core temperature is consistent with the external temperature, and the steel ingot is evenly heated through to obtain a heat-through steel ingot;

[0035] Step 2: Heat the heat-through steel ingot to 1260°C and keep it for 20 hours. After being released from the furnace, the discharged steel ingot is obtained. Keep warm for 18 hours.

Embodiment 3

[0037] A homogenization treatment process for S31254 super austenitic stainless steel, specifically comprising the following steps:

[0038] Step 1: Heat a 12-inch S31254 steel ingot to 800°C and keep it warm for 1.5 hours to make the core temperature of the steel ingot consistent with the external temperature. The temperature of the core of the steel ingot is consistent with the external temperature, and the steel ingot is evenly heated through to obtain a heat-through steel ingot;

[0039] Step 2: Heat the heat-through steel ingot to 1240°C and keep it for 18 hours. After being released from the furnace, the discharged steel ingot is obtained. Keep warm for 18 hours.

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Abstract

The invention relates to the field of metal forging, in particular to a homogenization treatment process of S31254 super austenitic stainless steel. The homogenization treatment process specifically comprises the following steps that step firstly, an S31254 steel ingot is heated to 720-820 DEG C, heating thoroughly is conducted, heating is conducted to 1100-1200 DEG C at a heating rate of 200-250 DEG C / h, and heating thoroughly is conducted to obtain a heated thoroughly steel ingot; and secondly, the heated thoroughly steel ingot is heated to 1240-1280 DEG C, heat preservation is conducted for 18-22 h, the steel ingot is discharged out of the furnace to obtain a discharged steel ingot, upsetting and drawing deformation is conducted on the discharged steel ingot, and then heat preservation continues to be conducted for 18-22 h at 1240-1280 DEG C. According to the method, rapid heating in a precipitated phase temperature sensitive interval is combined with two times of diffusion and upsetting and drawing processes, and the two processes supplement each other, so that the problem of a primary precipitated phase of an S31254 material is solved, the edges, the radius and the center of the steel ingot are free of the primary precipitated phase, the time is short, and the production efficiency is remarkably improved.

Description

technical field [0001] The invention relates to the field of metal forging, in particular to a homogenization treatment process for S31254 super austenitic stainless steel. Background technique [0002] S31254 super austenitic stainless steel has excellent seawater corrosion resistance and is mostly used in harsh environments such as petroleum and petrochemical industries and offshore platforms, and its usage is also increasing year by year. The segregation of S31254 bar will seriously affect the corrosion resistance of the material, thereby shortening the service life of the material. The precipitated phase of S31254 bar is an important factor to measure the degree of segregation and corrosion resistance of the material, so ensuring that there is no primary precipitated phase in S31254 bar is the key to production. The contents of Cr, Ni and Mo in S31254 super austenitic stainless steel are relatively high. At present, it is produced by one-time melting process, but the pr...

Claims

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Application Information

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IPC IPC(8): C21D8/06C22C38/02C22C38/04C22C38/42C22C38/44C21D6/00
CPCC21D8/065C22C38/02C22C38/04C22C38/42C22C38/44C22C38/001C21D6/004C21D6/005C21D6/008Y02P10/20
Inventor 史咏鑫栾吉哲王守明李青冯文静
Owner AVIC SHANGDA METAL REGENERATION TECH
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