Preparation method of 17-4PH stainless steel base

Abstract

The invention belongs to the field of base manufacturing and heat treatment and specifically relates to a preparation method of a 17-4PH stainless steel base. The preparation method of the 17-4PH stainless steel base mainly comprises the following step of manufacturing the 17-PH base by using a component design, smelting, casting, multiple forging and solution and aging combined treatment mode. According to the technical scheme of the preparation method of the 17-4PH stainless steel base, the content of delta-ferrite in the base can be preferably controlled; multiple forging is conducive to the formation of a high density dislocation wall in the base; the alloy micro-structure refining effect is obvious; phenomena of surface crack and hot shortness in the forging process are avoided; and the strength of the 17-4PH base is enhanced. Meanwhile, a convenient and rapid 17-4PH base preparation process is provided, the preparation efficiency is enhanced, the corrosion resistance performanceunder a complicated environment is met while the strength and the tenacity are guaranteed, the use performance of the 17-4PH base is comprehensively improved, demands of industrial production can be preferably satisfied, and scale production is realized.

Description

technical field [0001] The invention relates to the field of base manufacturing and heat treatment, in particular to a method for preparing a 17-4PH stainless steel base. Background technique [0002] The information disclosed in the background of the present invention is only intended to increase the understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or in any form to imply that the information constitutes the prior art known to those of ordinary skill in the art; recent years In the past, with the development of my country's offshore oil and gas resources, high-strength stainless steel materials have been widely used in underwater production systems such as subsea oil and gas transmission systems, offshore platform systems, and offshore transportation systems. Due to the complexity and particularity of the marine service environment, there are still risks of complex and large-scale material stress and...

AI Technical Summary

Problems solved by technology

[0012] Aiming at the limited improvement of the performance of the 17-4PH base in the above-mentioned prior art, surface cracking and thermal brittleness are prone to occur during the forging process, it is difficult to improve the product strength and plasticity at the same time, poor weldability, poor corrosion resistance and cumbersome process, etc., this paper The purpose of the invention is to provide a method for preparing a 17-4PH stainless steel base. The present invention combines composition design, smelting, casting, multiple forging and solid solution aging. Compared with the prior art, the present invention’s The technical solution can provide a convenient and fast preparation process for the 17-4PH base, a perfect forging scheme, improve the preparation efficiency, reduce cracking, meet the corrosion resistance in complex environments while ensuring strength and toughness, and comprehensively improve 17-4PH The mechanical and performance properties of the base can better meet the needs of industrial production and realize large-scale production

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