Maraging steel based on SLM (Selective Laser Melting) molded part and preparation method thereof

A technology of maraging steel and forming parts, applied in the field of steel materials, can solve the problems of poor performance of aging steel, small application range, unable to meet the needs of industrial design, etc., and achieve the effect of high strength and good rigidity
CN110280764AInactive Publication Date: 2019-09-27SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2019-09-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses maraging steel based on an SLM (Selective Laser Melting) molded part and a preparation method thereof. The preparation method comprises the following steps of: firstly, carrying out SLM molding on the powder of maraging steel used as a raw material to obtain the SLM molded part; then, carrying out surface treatment on the SLM molded part to obtain the compact SLM molded part; and finally carrying out solid solution treatment, aging treatment or direct aging treatment on the compact SLM molded part to obtain the maraging steel based on the SLM molded part. The SLM molded part is subjected to heat treatment by adopting the solid solution treatment, aging treatment or direct aging treatment, so that the mechanical strength and toughness of the SLM molded part are effectively improved; the range of application of the SLM molded part is expanded; the industrial design and manufacturing requirements are satisfied better; and the maraging steel based on the SLM molded part has the microhardness of 400-430HV and the tensile strength of 900-1000Mpa.
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Description

technical field

[0001] The invention belongs to the technical field of steel materials, and in particular relates to a maraging steel based on an SLM formed part and a preparation method thereof. Background technique

[0002] Maraging steel is a kind of ultra-high-strength, high-toughness steel, which has been widely used in many fields such as aerospace, precision gears and precision molds since its inception. The reason for the high strength of maraging steel is the nano-sized Ni 3 (Mo, Ti) and Fe 2 Mo intermetallic particles precipitated during heat treatment. The above-mentioned particles will significantly enhance the microhardness and strength by inhibiting the mobility of dislocations. Maraging steel has many advantages over other ultra-high-strength steels, such as easy manufacturing and processing, and excellent welding performance. Among all the materials developed today, it is the steel with the highest strength and toughness.

[0003] Selective laser melting ...

Claims

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