Laser & Optoelectronics Progress, Volume. 58, Issue 23, 2316002(2021)
Effect of Alumina Addition on Mechanical Properties of 3D-Printed 18Ni300 Die Steel
It is difficult to avoid the development of nano inclusions by crucible erosion during gas atomization process. Selective laser melting equipment was used to print 18Ni300 die steel powder with nanoalumina powder. The effects of nanoalumina powder additions on microstructure and mechanical properties of 3D-printed samples were studied to determine the tolerance limit for atomization pulverization. When the nanoalumina addition (mass fraction) is less than 1%, the second phase segregation is not detected for printed or low-temperature annealed samples. When more than 1% nanoalumina is added, the Ni3(Al, Ti) and Al2O3 segregation phases appear, and the number of internal cracks and spherical pores increases, decreasing in mechanical properties. The annealed sample containing 1% nanoalumina has the maximum tensile strength of 1658 MPa.
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Haiqing Zhang, Liangtao You, Zhonghui Cheng, Lei Shi, Ping Liu, Zhixiang Li. Effect of Alumina Addition on Mechanical Properties of 3D-Printed 18Ni300 Die Steel[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2316002
Category: Materials
Received: Mar. 4, 2021
Accepted: Apr. 1, 2021
Published Online: Nov. 19, 2021
The Author Email: Li Zhixiang (lzxiang@nimte.ac.cn)