Effect of Heat Treatment on Microstructure and Mechanical Properties of Laser Additively Manufactured AISI H13 Tool Steel

2017 ◽  
Vol 26 (11) ◽  
pp. 5577-5589 ◽  
Author(s):  
ChangJun Chen ◽  
Kai Yan ◽  
Lanlan Qin ◽  
Min Zhang ◽  
Xiaonan Wang ◽  
...  
Author(s):  
Mohammad Iqbal Yunus ◽  
Kanwarjeet Singh ◽  
Gaurav Arora ◽  
Ranganath M Singari

Heat treatment and surface processing are critical aspects of design and manufacture of components in a wide range of industrial sectors. Engineering materials, such as steel, are heat treated under controlled heating and cooling to alter their chemical, physical and mechanical properties to meet desired engineering applications. Gears engaged rotating at several thousand RPM. Inner Barrels of Injection Moulding machines, which is subjected to wear when thermoplastics, glass fibres are chosen to be injection moulded, Guide pillar Guide bush which slide over each other needs to be hardened from outside to improve hardness and wear resistance, but ductile from inside to bear fluctuating load, for this types of operation Case Hardening is required, to give desired property. In this detailed and systematic investigation, we have selected AISI H13 tool steel as for our research work specimen and we have made an effort to find out the mechanical properties (EDX, Hardness HV, Pin on Disc wear test) and micro structural properties (SEM, XRD) by comparing the two process one is traditional Case hardening heat treatment process i.e. Gas Nitriding and a new process i.e. Coating of Ni-based alloy powder on H13 Tool steel by Microwave Hybrid Heating (MHH) method in household microwave oven at 900W and 2.45 GHz and further find the best process. Investigation shows that coated Sample has good Wear resistance as compared to unmodified H13 Tool Steel sample and nitrided sample, Vicker’s micro-hardness of nitride sample is found to be 829.5HV, and for coated sample is 788HV, Coated sample has good Microstructure as compared to nitrided sample and is free from porous cracks.


2015 ◽  
Vol 46 (5) ◽  
pp. 2309-2321 ◽  
Author(s):  
Gururaj Telasang ◽  
Jyotsna Dutta Majumdar ◽  
Nitin Wasekar ◽  
G. Padmanabham ◽  
Indranil Manna

2018 ◽  
Vol 17 ◽  
pp. 15
Author(s):  
Karel Trojan ◽  
Václav Ocelík ◽  
Nikolaj Ganev ◽  
Stanislav Němeček ◽  
Jaroslav Čech ◽  
...  

The aim of this paper is to describe the effects of annealing on the microstructure of laser cladded AISI H13 tool steel using various methods. Advanced laser technology has the potential to replace conventional methods to make and repair dies. However, it has to be determined whether the newly created surface still needs to be heat-treated, which would cause additional repair costs. No significant effect of heat treatment on the microstructure and real structure of the clads was detected, but further confirmation, in particular by measuring wear resistance, is needed.


Author(s):  
Parisa Farahmand ◽  
Prabu Balu ◽  
Fanrong Kong ◽  
Radovan Kovacevic

Laser cladding (LC) of tool steel has significant application in rapid tooling, and surface coating for worn-out components in different industries. During the LC process, several phase transformations influence the microstructural and mechanical properties of the deposited layer. In order to successfully implement the LC process, it is essential to understand the relationship between the thermal cycle (heating and cooling), phase transformations, and the output quantities of the deposited layer. In this study a direct diode laser with a power of up to 8 kW was used to deposit AISI H13 tool steel on mild steel grade A36 substrate to enhance its surface properties. Primarily, an experimentally verified three-dimensional (3-D) heat transfer analysis was developed based on the finite element method to compute temperature history during the cladding and cooling process. Next, the computed thermal cycles were coupled with a semi-empirical thermo-kinetic model to estimate the hardness of deposited layers based on different cooling cycles in a time-temperature-transformation (TTT) diagram. Further, the microstructural details obtained from the cross-sections of the clad were correlated with the estimated thermal cycles and hardness. A good correlation between the modeled and experimental results revealed that the developed model can be used to estimate the microstructural characteristics and mechanical properties of the H13 layer produced by the LC process.


Wear ◽  
2005 ◽  
Vol 258 (5-6) ◽  
pp. 846-851 ◽  
Author(s):  
A. Bahrami ◽  
S.H. Mousavi Anijdan ◽  
M.A. Golozar ◽  
M. Shamanian ◽  
N. Varahram

2014 ◽  
Vol 57 (5) ◽  
pp. 1040-1051 ◽  
Author(s):  
Mumin Tutar ◽  
Hakan Aydin ◽  
Ali Durmus ◽  
Ali Bayram ◽  
Kurtulus Yigit

2019 ◽  
Vol 6 (5) ◽  
pp. 056412 ◽  
Author(s):  
Zahra Andalibi Fazel ◽  
Hassan Elmkhah ◽  
Meisam Nouri ◽  
Arash Fattah-alhosseini

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