30Cr15MoY alloy steel powder for laser additive manufacturing or remanufacturing and using method of 30Cr15MoY alloy steel powder
A laser additive and alloy steel technology, used in additive manufacturing, additive processing, metal processing equipment, etc., can solve the problems of poor mechanical properties, low hardness, poor formability, etc., and achieve good strength and toughness matching, excellent comprehensive performance, good fluidity
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Embodiment 1
[0095] Preparation of 30Cr15MoY alloy steel powder: after the 30Cr15MoY alloy steel master alloy is melted into molten steel by using a vacuum atomization induction melting furnace, the high-pressure argon gas is atomized into alloy steel powder material, and the melting temperature of the melting furnace is 1655 °C. The air pressure is 10MPa.
[0096] The 30Cr15MoY alloy steel powder prepared by the vacuum induction melting gas atomization method is prepared by laser additive manufacturing or remanufacturing of the 30Cr15MoY alloy steel sample. The sample preparation method includes the following steps:
[0097] Step 1, substrate material and powder pretreatment
[0098] The substrate material is 45# steel. First, use a grinding wheel to derust and decontaminate the surface of the substrate to make the surface bright, clean and smooth. Scrub it with alcohol and acetone in turn and dry it for later use;
[0099] Dry 30Cr15MoY alloy steel powder with a powder particle size of ...
Embodiment 2
[0123] The 30Cr15MoY alloy steel powder described in Steps 1 and 2 of Example 1 was used to prepare the laser remanufactured 30Cr15MoY alloy steel coating sample. Using the 30Cr15MoY alloy steel powder prepared in Example 1, the laser remanufacturing process parameters are: laser power 2100W, scanning speed 5mm / s, powder feeding amount 7.3g / min, powder feeding gas flow 5L / min, lap rate 40 %, the Z-axis lifting amount is 0.5mm, the cooling time between layers is 1min, and the high-temperature molten pool is protected by argon gas during the entire printing process.
[0124] The laser remanufactured 30Cr15MoY alloy steel coating sample prepared in this embodiment was analyzed and tested as follows:
[0125] (1) Preparation of 30Cr15MoY alloy steel coating samples and microstructure by laser remanufacturing
[0126] Figure 14 The macroscopic morphology of the 30Cr15MoY alloy steel coating sample was remanufactured by laser. The thickness of the sample is 3mm. It can be seen fr...
Embodiment 3
[0138] Preparation of 30Cr15MoY alloy steel powder: After the 30Cr15MoY alloy steel master alloy is melted into molten steel by using a vacuum atomization induction melting furnace, the high-pressure argon gas is atomized into alloy steel powder material, and the melting temperature of the melting furnace is 1645 ° C. When atomizing The air pressure is 11MPa.
[0139] The 30Cr15MoY alloy steel powder prepared by the vacuum induction melting gas atomization method is manufactured by laser additive manufacturing or remanufacturing of the 30Cr15MoY alloy steel sample prepared. The sample preparation method is the same as the steps 1 and 2 described in Example 1. Among them, this implementation The process parameters of the laser additive manufacturing used in the example are: laser power 2000W, scanning speed 5mm / s, powder feeding volume 5.5g / min, powder feeding air flow 5L / min, lap rate 40%, Z-axis lifting volume 0.4 mm, the cooling time between layers is 3min.
[0140] The 30C...
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