P20+Ni steel is a high-quality plastic mold steel with excellent performance. Its manufacturing process includes the selection of raw materials, smelting, continuous casting, rolling, heat treatment, and other links. Each step of the manufacturing process has a critical impact on the quality and performance of AISI P20+Ni steel. This article will introduce the manufacturing process of AISI P20+Ni steel, including some key steps and technologies from raw materials to finished products, to ensure the excellent quality of the final product.
Before the smelting stage of AISI P20+Ni steel, the first step is to select suitable high-quality raw materials. The content of elements will directly affect the performance of the steel, so it is necessary to strictly control its content and purity when selecting raw materials to ensure that P20+Ni steel The chemical composition of the steel meets the standard requirements and the uniformity and performance stability of the steel.
In the smelting process of AISI P20+Ni steel, the raw materials that have been batched and mixed are first put into an electric arc furnace for high-temperature smelting to form molten steel. The molten steel after smelting needs to be refined and tempered. By heating and maintaining a specific temperature, common methods include vacuum treatment, redox treatment and tapping decarburization treatment. Through these technical means, the impurities and bad phases in the raw materials can be eliminated, the purity and uniformity of the steel can be improved, and a finer and uniform grain structure and a uniformly distributed liquid alloy can be formed.
In this process, it is necessary to strictly control the content of alloying elements added, melting temperature and time, etc., to ensure the full dissolution and uniform distribution of alloying elements, and to ensure the purity and fluidity of molten steel.
After smelting, the molten steel is continuously cast through a continuous casting machine, cooled and crystallized, and cast into billets or blanks of a certain shape and size. According to different manufacturing needs, different casting methods can be selected, such as continuous casting, investment casting, centrifugal casting or pressure casting, etc.
In the continuous casting process of AISI P20+Ni steel, it is necessary to control the pouring temperature and cooling rate to ensure that the structure of the steel is uniform and free of defects. It is also necessary to accurately control the temperature, shape and size of the blank to ensure the smooth progress of subsequent processing.
The cast billet is rolled to further refine its shape and size. First, the billet enters the hot rolling mill after being heated, and then undergoes multi-pass compression and stretching to gradually reduce the thickness and increase the hardness. The P20+Ni die steel after hot rolling is cold rolled, which can further reduce the thickness and improve the flatness.
During the rolling process of AISI P20+Ni steel, the heating temperature, rolling speed, surface roughness, compression ratio, deformation, etc. should be strictly controlled to ensure the microstructure and mechanical properties of the steel.
DIN 1.2738 / AISI P20+Ni steel undergoes high-temperature heat treatment after the rolling process, including steps of preheating, soaking and heat preservation. P20+Ni steel undergoes heat treatment, which changes the internal structure of the steel and transforms it from austenite to martensite, thereby improving its strength, wear resistance and hardness to obtain ideal structure and performance.
In the heat treatment process, by controlling the heating rate, cooling rate and temperature profile, it is ensured that the microstructure of the billet is fully adjusted in lattice and phase transformation transformation, so as to obtain the required microstructure and mechanical properties.
The P20+Ni tool steel after heat treatment is processed and surface treated to ensure the surface quality, shape and size of the steel. The usual processing methods are turning, polishing, grinding, pickling, milling and other processes. Surface treatments include nickel plating, spray painting, chrome plating, chemical conversion, etc. to remove surface defects and improve surface quality, corrosion resistance and aesthetics.
The purpose of this stage is to ensure the dimensional accuracy and surface finish of the product while maintaining the internal properties of the steel.
After processing, the quality inspection of AISI P20+Ni steel is carried out to ensure that it meets the specified standards. It mainly includes chemical analysis, metallographic analysis, dimensional measurement, mechanical performance testing, etc.
After the inspection, send the quality inspection report, video and pictures to the customer for confirmation. After confirmation, pack according to the customer’s needs, including wooden box packaging, pallet packaging, etc., to ensure that the steel will not be damaged during transportation.
In summary, the manufacturing process of AISI P20+Ni steel includes key steps such as raw material preparation, smelting, casting, rolling, heat treatment, surface treatment, and machining. Every step of these manufacturing processes affects the quality and performance of P20+Ni steel, so it is necessary to strictly control the relevant parameters of each step in order to produce the highest quality DIN 1.2738 / AISI P20+Ni steel.
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