Relationship Between Alloy Composition and Tool-Life of High-Speed Steel Twist Drills

1992 ◽  
Vol 114 (4) ◽  
pp. 459-464 ◽  
Author(s):  
W. E. Henderer
Keyword(s):  
Tool Life ◽  
High Speed ◽  
Alloy Composition ◽  
High Speed Steel ◽  
Vanadium Content ◽  
The Matrix ◽  
Life Tests ◽  
And Performance ◽  
Twist Drills ◽  
The Relationship

Tool-life tests are reported which show the relationship between the alloy composition of high-speed steel twist drills and performance. Tool-life is shown to depend primarily on the composition of the matrix consisting of tempered martensite and precipitated secondary carbides. The longest tool-life was obtained from alloys with high vanadium content and low tungsten or molybdenum content. This observation is consistent with the dispersion characteristics of vanadium carbide which precipitate during tempering.

TNW

Alloy Digest ◽  
1984 ◽  
Vol 33 (12) ◽  
Keyword(s):  
High Speed ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Heat Treating ◽  
Vanadium Content ◽  
Cold Forming ◽  
Molybdenum Steel ◽  
End Mills ◽  
Forming Tools ◽  
Twist Drills

Abstract TNW is a high-speed steel. It has an optimum alloy composition that combines the good toughness characteristics of a high-molybdenum steel and the excellent abrasion resistance provided by a 2% vanadium content. TNW is a popular choice for twist drills, taps, reamers, router bits, end mills and other similar cutting tools. Also its good toughness makes it well suited to punches and other difficult cold-forming tools requiring the properties of a high-speed steel. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on high temperature performance as well as forming, heat treating, and machining. Filing Code: TS-433. Producer or source: Latrobe Steel Company.

Microstructure and Properties of CBN Diffusion Coating on High-Speed Steel

2011 ◽  
Vol 312-315 ◽  
pp. 542-547 ◽  
Author(s):  
Alexander S. Chaus ◽  
Lubomír Čaplovič ◽  
Ján Porubský
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tool Life ◽  
High Speed ◽  
Diffusion Coating ◽  
High Speed Steel ◽  
X Ray ◽  
End Mills ◽  
The Relationship ◽  
Scanning Electron

CBN diffusion coating on the ball nose end mills made of AISI-M35 high speed steel (HSS) has been produced thermo-chemically. The microstructure and component depth profiles of the CBN diffusion layer have been studied by scanning electron microscopy and energy dispersive X-ray spectrometry. The results on laboratory cutting tests of ball nose end mills made of AISI-M35 HSS with and without complex CBN diffusion coating are also introduced in the paper. The relationship between wear kinetics and tool life has been established. It was shown that under the used cutting conditions the tool life of the mills with the coating was a factor of 1.6 higher than that of the mills without the coating. The higher tribological stability of the coating in cutting process was supported by metallographic observations of the worn surfaces using scanning electron microscopy.

Strengthening Mechanisms in High-Speed Steel as Related to Tool-Life

1979 ◽  
Vol 101 (2) ◽  
pp. 217-222 ◽  
Author(s):  
W. E. Henderer
Keyword(s):  
Yield Strength ◽  
Tool Life ◽  
High Speed ◽  
High Speed Steel ◽  
Precipitation Strengthening ◽  
Strengthening Mechanisms ◽  
Precipitation Sequence ◽  
Tempering Temperature ◽  
Life Tests ◽  
Secondary Hardness

Tool-life tests are reported which show that the performance of AISI M1 high speed steel taps responds to the tempering temperature in the same manner as the yield strength. The metallurgical transformations which occur during tempering are described in detail with specific attention given to the precipitation reactions which occur over the temperature range of peak secondary hardness. The variation in yield strength is found to be consistent with a coherent-incoherent precipitation sequence of alloy carbides during tempering. An estimate of the yield strength is made based on dislocation theories of martensitic and precipitation strengthening.

The Performance of Small Diameter Twist Drills in Deep-Hole Drilling

2006 ◽  
Vol 128 (4) ◽  
pp. 884-892 ◽  
Author(s):  
Robert Heinemann ◽  
Srichand Hinduja ◽  
George Barrow ◽  
Gerhard Petuelli
Keyword(s):  
Tool Life ◽  
High Speed ◽  
Small Diameter ◽  
High Speed Steel ◽  
Minimum Quantity Lubrication ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Flute Surface ◽  
Twist Drills

This paper investigates the performance of small diameter high-speed steel twist drills drilling boreholes with a depth of ten times the diameter into carbon steel AISI 1045 using minimum quantity lubrication. The performance of small twist drills is determined, first, by their deep-hole drilling capability, i.e., in how far the cutting forces can be kept at a noncritical level by maintaining the chip disposal, and, second, by their tool life. This work shows that both the deep-hole drilling capability and tool life of small drills are strongly dependent on their geometry, in particular the size of the chip flutes, and the flute surface topography.

Study of the Distribution of the Life of HSS Tools

1971 ◽  
Vol 93 (4) ◽  
pp. 1044-1050 ◽  
Author(s):  
J. G. Wager ◽  
M. M. Barash
Keyword(s):  
Tool Life ◽  
High Speed ◽  
Low Carbon Steel ◽  
High Speed Steel ◽  
Distribution Patterns ◽  
Similar Distribution ◽  
Low Carbon ◽  
Mean Values ◽  
Life Tests ◽  
Life Predictions

Numerous life tests carried out with high speed steel tools in machining low carbon steel indicate that tool life values are subject to a statistical distribution which can be approximated by the normal distribution with a coefficient of variation of about 0.3. Accelerated and normal tests show similar distribution patterns, which indicates a possibility for a wider use of accelerated tests. The conventionally accepted concepts of tool life “constant” and “exponent” should be considered only as representing statistical mean values which are not sufficient for the prediction of the life of any individual tool put to work. It is recommended that tool life predictions be made on a probabilistic basis, and the desired direction of further studies is indicated.

Geometry, specification, and drilling performance of a plane rake faced drill point design

2010 ◽  
Vol 224 (2) ◽  
pp. 369-378 ◽  
Author(s):  
Q Zhang ◽  
J Wang
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Rake Angle ◽  
Drilling Force ◽  
Performance Improvements ◽  
Drilling Performance ◽  
Life Tests ◽  
Drill Point ◽  
Force Reduction ◽  
Twist Drills

A study of a modified drill point design with plane rake faces is presented. The critical geometries that uniquely define the drill point design are analysed based on the international standard. The study shows that the modified drill design yields positive normal rake angle on the entire lips and point relieving in the chisel edge region. An experimental study of drilling a high tensile steel using 7–13 mm high-speed steel (HSS) drills with titanium nitride (TiN) coatings has been carried out to assess the new drill point design. It shows that the modified plane rake faced (PRF) drills can reduce the thrust force by as much as 46.9 per cent with an average of 23.8 per cent, as compared to the conventional twist drills under the corresponding cutting conditions, while the reduction in torque is also significant with the maximum of 24.9 per cent. These drilling performance improvements are comparable to those from using the multi-facet drills that were claimed as one of the most heartening drill developments in several decades for drilling force reduction, while the PRF drills can be easily sharpened using the conventional twist drill grinders. The drill-life tests amply demonstrate the superiority of the PRF drills over the conventional twist drills.

Evaluation of Tool Performance of Recycle-Type Fe3Al Based Alloy for Pure Cu

2014 ◽  
Vol 783-786 ◽  
pp. 1142-1146
Author(s):  
Takaomi Itoi ◽  
Tomoaki Sudo ◽  
Kyosuke Yoshimi
Keyword(s):  
Tool Life ◽  
High Speed ◽  
Cutting Speed ◽  
High Speed Steel ◽  
Induction Melting ◽  
Iron Aluminum ◽  
Tool Performance ◽  
Pure Cu ◽  
The Relationship

Recycle-type Fe3Al (hereinafter designated as Re-Fe3Al) based alloys reinforced by the carbides of TiC or ZrC were processed by the high frequency induction melting method using a high-carbon Cr steel sludge, Al can scraps and the transition metals of Ti or Zr. The carbides were synthesized by in-situ reaction between the transition metal and carbon in the molten iron aluminum alloy. Vickers hardness values are 309HV0.5 for Re-Fe3Al/TiC alloy, and 473HV0.5 for Re-Fe3Al/ZrC alloy, which are higher than that of P-Fe3Al (preprared from pure-Fe and-Al). The cutting performance of the Re-Fe3Al baed alloys was compared with a High-Speed-Steel (HSS) by cutting tests for pure-Cu extruded bar (C1020) using a lathe under a dry condition. Tool life limit was estimated from frank wear length after the cutting tests of C1020 by finish-machining. Tool life limit of Re-Fe3Al/TiC alloy is more than16 min; P-Fe3Al was 12 min; HSS was 8 min, Re-Fe3Al/ZrC alloy was 7 min at the cutting speed of 100m/min. Also, tool life limit of the Re-Fe3Al/TiC alloy was more than twice times as long as that of the HSS at the cutting speed of 300/min. The relationship between cutting speed and tool life limit clearly indicated that the Re-Fe3Al/TiC alloy was better than the HSS at a higher cutting speed. Therefore, it was concluded that Re-Fe3Al/TiC alloy has excellent cutting tool performance.

THYRAPID 3343

Alloy Digest ◽  
1998 ◽  
Vol 47 (2) ◽  
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Alloy Composition ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Heat Treating ◽  
Steel Grade ◽  
High Toughness ◽  
Circular Saws ◽  
Twist Drills

Abstract Thyrapid 3343 is a standard high-speed steel grade with balanced alloy composition, high toughness, good cutting power, and consequently versatile applications. Thyssen Thyrapid 3343 is suitable for all metal-cutting tools for roughing or finishing, such as twist drills, milling cutters of all types, taps, cutting tools, broaches, reamers, countersinks, chasens, segments for circular saws, shaping tools, and woodworking tools. This datasheet provides information on composition and physical properties. It also includes information on heat treating and machining. Filing Code: TS-560. Producer or source: Thyssen Specialty Steels Inc.

AISI TYPE M7

Alloy Digest ◽  
1987 ◽  
Vol 36 (10) ◽  
Keyword(s):  
Tool Steel ◽  
High Speed ◽  
High Speed Steel ◽  
Heat Treating ◽  
Significant Loss ◽  
Steel Mills ◽  
Aisi Type ◽  
End Mills ◽  
The Many ◽  
Twist Drills

Abstract AISI Type M7 is a molybdenum type of high-speed steel. It is somewhat similar to AISI Type M1 tool steel but with higher percentages of carbon and vanadium to provide an improvement over AISI Type M1 in cutting characteristics without a significant loss in toughness. It is suitable for a wide variety of cutting-tool applications where improved resistance to abrasion is required. The many uses of Type M7 include twist drills, end mills, shear blades, punches, milling cutters, lathe tools, taps and reamers. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming, heat treating, machining, and surface treatment. Filing Code: TS-483. Producer or source: Tool steel mills. See also Alloy Digest TS-468, January 1987.

TATMO

Alloy Digest ◽  
2006 ◽  
Vol 55 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Physical Properties ◽  
High Speed ◽  
High Speed Steel ◽  
Heat Treating ◽  
General Purpose ◽  
Twist Drills

Abstract Tatmo is a general-purpose high-speed steel often used in twist drills and taps. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on wear resistance as well as forming, heat treating, and machining. Filing Code: TS-633. Producer or source: Timken Latrobe Steel.

Sign in / Sign up

Export Citation Format

Share Document