Topic
Maraging steel
About: Maraging steel is a research topic. Over the lifetime, 1728 publications have been published within this topic receiving 19886 citations. The topic is also known as: martensitic ageing steel.
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TL;DR: In this article, the same and dissimilar metal welds made in solutionized condition were subjected to standard post weld hardening treatments direct ageing at 485 °C, soaking for 3½ hours followed by air cooling (ageing treatment of maraging steel) and direct aging at 510′°C.
14 citations
TL;DR: In this paper, the fatigue properties of nitrided 18Ni maraging steel sheets under cyclic tension loading were investigated at cycling frequency 95'Hz by using a resonance tester and at 20'kHz using ultrasonic fatigue testing equipment.
14 citations
12 Oct 2021
TL;DR: In this article, a series of benchmarking coupons were additively printed at four different power levels (160 W, 240 W, 320 W, and 380 W) and with the integration of sequential machining passes after every 10 deposited layers, as well as final finishing of selected surfaces.
Abstract: Hybrid manufacturing is often used to describe a combination of additive and subtractive processes in the same build envelope. In this research study, hybrid manufacturing of 18Ni-300 maraging steel was investigated using a Matsuura LUMEX Avance-25 system that integrates metal additive manufacturing using laser powder bed fusion (LPBF) processing with high-speed machining. A series of benchmarking coupons were additively printed at four different power levels (160 W, 240 W, 320 W, 380 W) and with the integration of sequential machining passes after every 10 deposited layers, as well as final finishing of selected surfaces. Using non-contact three-dimensional laser scanning, inspection of the final geometry of the 18Ni-300 maraging steel coupons against the computer-aided design (CAD) model indicated the good capability of the Matsuura LUMEX Avance-25 system for net-shape manufacturing. Linear and areal roughness measurements of the surfaces showed average Ra/Sa values of 8.02–14.64 µm for the as-printed walls versus 0.32–0.80 µm for the machined walls/faces. Using Archimedes and helium (He) gas pycnometry methods, the part density was measured to be lowest for coupons produced at 160 W (relative density of 93.3–98.5%) relative to those at high power levels of 240 W to 380 W (relative density of 99.0–99.8%). This finding agreed well with the results of the porosity size distribution determined through X-ray micro-computed tomography (µCT). Evaluation of the static tensile properties indicated that the coupons manufactured at the lowest power of 160 W were ~30% lower in strength, 24% lower in stiffness, and more than 80% lower in ductility relative to higher power conditions (240 W to 380 W) due to the lower density at 160 W.
14 citations
Patent•
19 Nov 2003TL;DR: In this paper, a method of producing maraging steel, which includes producing a consumable electrode for vacuum remelting; and subjecting the consumable electrodes to the vacuum remeling, is described.
Abstract: Disclosed is a method of producing maraging steel, which includes producing a consumable electrode for vacuum remelting; and subjecting the consumable electrode to the vacuum remelting. The consumable electrode contains not less 5 ppm Mg. Disclosed is also a maraging steel containing, by mass %, at least, from more than zero to less than 10 ppm Mg, less than 10 ppm oxygen, and less than 15 ppm nitrogen. The steel contains also nitride inclusions having a maximum length of not more than 15 μm and oxide inclusions having a maximum length of not more than 20 μm. Regarding the oxide inclusions, a content rate of spinel form inclusions having a length of not less than 10 μm to a total content of the spinel form inclusions having a length of not less than 10 μm and alumina inclusions having a length of not less than 10 μm exceeds 0.33 (i.e. 33%).
14 citations
Patent•
04 Oct 2007
TL;DR: An ultra strong, hollow sintered, impervious, metallic shell for use in structural applications including proppants for hydraulic fracturing is described in this paper, which is made of a maraging steel, low alloy steel, or stainless steel with a crush strength of about 3,000 psi or greater and a density of about 0.6 g/cm 3 to about 2.5 g/mm 3.
Abstract: An ultra strong, hollow sintered, impervious, metallic shell for use in structural applications including proppants for hydraulic fracturing. The shell is made of a maraging steel, low alloy steel, or stainless steel with a crush strength of about 3,000 psi or greater and a density of about 0.6 g/cm 3 to about 2.5 g/cm 3 .
14 citations