High Speed Steel M42
The chemical composition of M42 molybdenum high speed tool steel is outlined in the following table.M42 tool steel can be drilled, turned, threaded, broached, milled and tapped when it is in its annealed condition and rated at 45% of 1% carbon steel.M42 molybdenum high speed tool steel is preheated to 871°C (1599°F) in a slow manner and then soaked. This is followed by rapid heating to 1093°C (1999°F) and slow cooling. Temperatures below 982°C (1799°F) are not suitable for the forging process.
High Speed Steel T42
T42 have been used as high performance cutting and rolling tools. Tools structural application is a combination of high strength, wear resistance, high hardness together with toughness, fatigue resistance and thermal resistance [1,4 Recent research on extending tools life and improving structural performance are being carried out through manufacturing process, heat-treatment, surfacing process and alloying elements.SPS technique has the merits of faster heating rates, shorter sintering times and high density [31. During SPS process, alloy powders in a graphite die are pressed uniaxially a D.C. pulse voltage is applied and the heating is accomplished by electric discharge between particles. However, the research for the T42 using SPS was not carried out generally.
High Speed Steel M35
M35, 5% Cobalt tool bits are designed for heavy duty machining alloy steels and tough materials, such as castings and forgings. They have high heat and abrasion resistant properties and are best used when making heavy cuts, at high speeds and feeds, or where high heat is a factor.Cobalt added M2 high speed steel in which the cobalt addition provides hot hardness, The improved hot hardness makes the steel suitable for machining high-strength and prehardened steels, high-hardness alloys.
High Speed Steel M2
M2 is a general purpose molybdenum high speed steel. This grade is characterized by balanced Combination of abrasion resistance, toughness and good red hardness. Due to its comparatively low Carbon content, M2 has an excellent combination of toughness properties and abrasion resistance When properly hardened and tempered. M2 is used in a wide used for all kinds of cutting tool, knife and punch and die applications.
High Speed Steel T4
Tools steels are mainly used for manufacturing tools used in machining plastics, metals and woods. However, tool steels must be fabricated into the desired shape before they are able to be used. They have good toughness; wear resistance, machinability and resistance to decarburization.T4 tool steel is a high speed, tungsten type tool steel. It is a deep hardening alloy capable of Rockwell C 64 hardness.
High Speed Steel T5
Tungsten high-speed tool steels are designated group T steels according to the AISI classification system and range from T1 to T15. These steels have similar characteristics to those of molybdenum high-speed tool steels. The following sections will discuss T5 tool steels in more detail.
High Speed Steel T1
T1 is an air or oil hardening tool steel that is an excellent cutting tool material. It has a good combination of toughness and red hardness and is relatively easy to harden.Tungsten is a good carbide former used in high speed steels and hot forming tool steels. It is a steel gray metal that increases temperature and red hardness, prevents gain growth and improves toughness of steels.Tungsten high speed tool steels or group T steels range from T1 to T15 series. This article on tool steel type T1 will focus on the chemical composition, physical, mechanical and thermal properties and other designations of T1 tool steels.
High Speed Steel ASP30
ASP 30 is a high alloyed powder metallurgical (PM) high speed steel characterized by:
• high wear resistance
• high compressive strength at high hardness
• good through-hardening properties
• good toughness
• good dimensional stability during heat treatment
• good grindability and machinability
• very good temper resistance.
High Speed Steel ASP23
ASP 23 is a chromium-molybdenum-tungsten-vanadium alloyed high speed steel which is characterized by:
• High wear resistance (abrasive profile)
• High compressive strength
• Very good through-hardening properties
• Good toughness
• Very good dimensional stability on heat treatment
• Very good temper resistance
ASP 23 is especially suitable for blanking and forming of thinner work materials where a mixed (abrasive-adhesive) or abrasive type of wear is encountered and where the risk for plastic deformation of the working surfaces of the tool is high.