کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5455305 1514640 2017 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence mechanism of parameters process and mechanical properties evolution mechanism of maraging steel 300 by selective laser melting
ترجمه فارسی عنوان
ساز و کار تأثیر پارامترهای فرایند و مکانیزم تکامل مکانیکی مارپیچ فولاد 300 با انتخاب ذرات لیزر
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
Selective laser melting (SLM) is one kind of additive manufacturing process to fabricate metal parts through laser melting. A maraging steel 300 was manufactured by SLM. And the influence of process parameters (laser powder, scanning speed and scanning space) on the relative density of maraging steel 300 was investigated first. Then a series of block and plate specimens were manufactured. Some specimens were taken as control groups, and others underwent heat treatment by solution treatment (ST) and solution treatment +aging treatment (ST+AT) respectively. The investigation involved microstructure, microhardness, tensile strength and impact toughness. It is shown that: low or high laser power, scanning speed or scanning space all reduced the relative density, and the optimized process parameters could be obtained by orthogonal experiment. After ST, the cellular structure and microscopic segregation disappeared, and the new smaller particles precipitated out after AT. The Ni, Mo and Ti dissolved in the matrix during ST separated out again forming tiny Ni3Mo, Fe2Mo and Ni3Ti particles during AT. The microhardness and tensile strength dropped a little with elongation increasing after ST. While they increased significantly with elongation decreasing after AT. The impact toughness increased little after ST, but decreased sharply after AT.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 703, 4 August 2017, Pages 116-123
نویسندگان
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