Effect of niobium on microstructure of cast AISI H13 hot work tool steel

Kheirandish, Shahram; Noorian, A

doi:10.1016/s1006-706x(08)60145-4

Cited by 71 publications

(39 citation statements)

References 13 publications

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“…A number of improvements have been made in its microstructure and positive features have been achieved in dealing with the difficulties in processing this steel by applying heat treatment and by adding various alloy elements. Due to these features, even with cutting area temperatures reaching up to 600 °C during the processing of AISI H13, hardness did not decrease and the steel exhibited high strength [1][2][3][4][5]. In order to rise to such challenges, an increasing number of studies on cutting tool materials and cutting parameters are being made.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis and Theoretical Modelling of Cutting Parameters in the Drilling of AISI H13 Steel with Coated and Uncoated Drills

Tekaüt

Demir

Şeker

2018

TFAMENA

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SummaryIn this study, drillability experiments were carried out on the AISI H13 hot work steel which is difficult to machine. Uncoated and AlCrN-coated carbide drills, ø14 mm, were used at 4 cutting speeds (60, 75, 90 and 108 m/min) and three different feed rates (0.15, 0.20 and 0.25 mm/rev). As a result of the experimental work, it was observed that an increase in the feed rate caused an increased on the thrust force in the workpiece machined with both the uncoated and coated drills. While an increase in the cutting speed caused the thrust force to increase in operations performed with uncoated drills, the increased cutting speed led to a decreased torque. In contrast, an increase in the cutting speed caused both the thrust force and the torque to decrease in the operations with coated drills. Stresses occurring on the drills were analyzed and a mathematical model was developed using the finite element method and the ANSYS Workbench package software.

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Section: Introductionmentioning

confidence: 99%

Experimental Analysis and Theoretical Modelling of Cutting Parameters in the Drilling of AISI H13 Steel with Coated and Uncoated Drills

Tekaüt

Demir

Şeker

2018

TFAMENA

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“…Toughness and yield strength, determined by the martensite and carbides [3,4], are the most important mechanical properties of H13 [5].…”

Section: Introductionmentioning

confidence: 99%

Precipitation Behavior of Carbides in H13 Hot Work Die Steel and Its Strengthening during Tempering

Ning

Mao

Chen

et al. 2017

Metals

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Abstract:The properties of carbides, such as morphology, size, and type, in H13 hot work die steel were studied with optical microscopy, transmission electron microscopy, electron diffraction, and energy dispersive X-ray analysis; their size distribution and quantity after tempering, at different positions within the ingot, were analyzed using Image-Pro Plus software. Thermodynamic calculations were also performed for these carbides. The microstructures near the ingot surface were homogeneous and had slender martensite laths. Two kinds of carbide precipitates have been detected in H13: (1) MC and M 6 C, generally smaller than 200 nm; and (2) M 23 C 6 , usually larger than 200 nm. MC and M 6 C play the key role in precipitation hardening. These are the most frequent carbides precipitating at the halfway point from the center of the ingot, and the least frequent at the surface. From the center of the ingot to its surface, the size and volume fraction of the carbides decrease, and the toughness improves, while the contribution of the carbides to the yield strength increases.

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“…C. N. Elias and C. S. Da Costa Viana 7) reported their studies about the effect of partial substitution of 0.07%Nb for V on austenite grain size and hardness of H13 steel, and the results showed that the H13 + Nb steel had a smaller austenite grain size and a finer carbide size distribution than the vanadium steel, which indicated a higher potential toughness. Shahram Kheirandish et al 8) studied the effect of niobium addition on the microstructure of cast AISI hot work tool steel. The result showed that the 1.1% niobium addition by replacing 0.5% V and 0.4% Mo modified the cast structure of Nb-alloyed hot work tool steel, reduced the size and volume of eutectic cells, and increased the…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Generating Mechanism of Large Precipitates in Nb–Ti-microalloyed H13 Tool Steel

Xie

Cheng

Chen³

et al. 2016

ISIJ Int.

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Effect of niobium on microstructure of cast AISI H13 hot work tool steel

Cited by 71 publications

References 13 publications

Experimental Analysis and Theoretical Modelling of Cutting Parameters in the Drilling of AISI H13 Steel with Coated and Uncoated Drills

Experimental Analysis and Theoretical Modelling of Cutting Parameters in the Drilling of AISI H13 Steel with Coated and Uncoated Drills

Precipitation Behavior of Carbides in H13 Hot Work Die Steel and Its Strengthening during Tempering

Characteristics and Generating Mechanism of Large Precipitates in Nb–Ti-microalloyed H13 Tool Steel

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