Gradient material and preparation method thereof
A gradient material and manufacturing method technology, applied in the direction of additive manufacturing, additive processing, metal processing equipment, etc., can solve the composition, structure and stress discontinuity, ferritic martensitic steel and austenitic stainless steel composition and microscopic Problems such as large tissue differences and easy failure can be achieved to improve service safety, uniform hardness and tissue transition, and increase service life.
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Embodiment 1
[0080] Embodiment 1 prepares T91 / 316H type gradient material (gradient 10%)
[0081] Preparation of T91 steel powder and 316H stainless steel powder
[0082] Prepare the corresponding 316H and T91 homogeneous alloy ingots, and gas atomize the homogeneous alloy ingots; then perform drying treatment and deoxidation treatment so that the oxygen content is ≤ 10ppm, and perform air classification and powder batching to obtain 316H pre-alloyed powder with a purity ≥ 99.5% and a particle size range of 50-153 μm, and T91 pre-alloyed powder with a purity ≥ 99.5% and a particle size range of 50-153 μm.
[0083] Laser Additive Manufacturing Gradient Materials
[0084] Evacuate the air in the print chamber and fill it with argon. Wipe the surface of the 304 stainless steel substrate with alcohol, dry it, place it on the platform of the CNC machine tool and preheat it to 80°C.
[0085] First, 20 layers of T91 steel were printed on the substrate with the above-mentioned pre-alloyed powde...
Embodiment 2
[0098] Embodiment 2 prepares T91 / 316H type gradient material (gradient 20%)
[0099] Preparation of T91 steel powder and 316H stainless steel powder
[0100] Prepare the corresponding 316H and T91 homogeneous alloy ingots, and gas atomize the homogeneous alloy ingots; then perform drying treatment and deoxidation treatment so that the oxygen content is ≤ 10ppm, and perform air classification and powder batching to obtain 316H pre-alloyed powder with a purity ≥ 99.5% and a particle size range of 50-153 μm, and T91 pre-alloyed powder with a purity ≥ 99.5% and a particle size range of 50-153 μm.
[0101] Laser Additive Manufacturing Gradient Materials
[0102] Evacuate the air in the print chamber and fill it with argon. Wipe the surface of the 304 stainless steel substrate with alcohol, dry it, place it on the platform of the CNC machine tool and preheat it to 80°C.
[0103] First, 40 layers of T91 steel were printed on the substrate with the above-mentioned pre-alloyed powde...
Embodiment 3
[0112] Embodiment 3 prepares T91 / 316H type gradient material (gradient 5%)
[0113] Preparation of T91 steel powder and 316H stainless steel powder
[0114] Prepare the corresponding 316H and T91 homogeneous alloy ingots, and gas atomize the homogeneous alloy ingots; then perform drying treatment and deoxidation treatment so that the oxygen content is ≤ 10ppm, and perform air classification and powder batching to obtain 316H pre-alloyed powder with a purity ≥ 99.5% and a particle size range of 50-153 μm, and T91 pre-alloyed powder with a purity ≥ 99.5% and a particle size range of 50-153 μm.
[0115] Laser Additive Manufacturing Gradient Materials
[0116] Evacuate the air in the print chamber and fill it with argon. Wipe the surface of the 304 stainless steel substrate with alcohol, dry it, place it on the platform of the CNC machine tool and preheat it to 80°C.
[0117] First, 40 layers of T91 steel were printed on the substrate with the above-mentioned pre-alloyed powder...
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Abstract
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