What is the use of tool steel and die steel?

-

Tool and die steels

Tool and die steels are high carbon steels (either carbon or alloy) possessing high hardness, strength and wear resistance.
Tool steels are heat treatable.
In order to increase hardness and wear resistance of tool steels, alloying elements forming hard and stable carbides (chromium, tungsten, vanadium, manganese, molybdenum) are added to the composition.
Designation system of one-letter in combination with a number is accepted for tool steels.
The letter means: 
  • W - Water hardened plain carbon tool steels
  • O, A, D - Cold work tool steels
  • S – Shock resistant low carbon tool steels
  • T,M – High speed tool steels (T-tungsten, M-molybdenum)
  • H – Hot work tool steels
  • P – Plastic mold tool steels
Chemical compositions of some tool and die steels
Properties of some tool and die steels

W - Water hardened plain carbon tool steels

 Applications: chisels, forging dies, hummers, drills, cutters, shear blades, cutters, drills, razors.
Properties: low cost, very hard, brittle, relatively low hardenability, suitable for small parts working at not elevated temperatures. 

O, A, D - Cold work tool steels

 Applications: drawing and forging dies, shear blades, highly effective cutters.
Properties: strong, hard and tough crack resistant.
O -Oil hardening cold work alloy steels;
A -Air hardening cold work alloy steels;
D -Diffused hardening cold work alloy steels; 

S – Shock resistant low carbon tool steels

 Applications: tools experiencing hot or cold impact.
Properties: combine high toughness with good wear resistance. 

T,M – High speed tool steels (T-tungsten, M-molybdenum)
 Applications: cutting tools.
Properties: high wear heat and shock resistance.

H – Hot work tool steels

 Applications: parts working at elevated temperatures, like extrusion, casting and forging dies.
Properties: strong and hard at elevated temperatures. 

P – Plastic mold tool steels

 Applications: molds for injection molding of plastics.
Properties: good machinability

评论

发表评论

此博客中的热门博文

AISI 8620 Steel | 1.6523 | 21NiCrMo2 | SNCM220

-
图片
AISI  8620 Steel  is a low alloy nickel, chromium, molybdenum case hardening steel, generally supplied in the as-rolled condition with a maximum hardness of HB 255max. SAE steel 8620 offers high external strength and good internal strength, making it highly wear resistant. AISI 8620 steel has a higher core strength than grades 8615 and 8617. SAE 8620 alloy steel is flexible during hardening treatments, thus enabling improvement of case/core properties. Pre-hardened and tempered (un carburized) 8620 can be further surface hardened by nitriding but will not respond satisfactorily to flame or induction hardening due to its low carbon content. Steel 8620 is suited for applications which require a combination of toughness and wear resistance. This grade is commonly supplied in round bar. 1. AISI 8620 Steel Supply Range 8620 Round Bar: diameter 8mm – 3000mm 8620 Steel Plate: thickness 10mm – 1500mm x width 200mm – 3000mm 8620 Square Bar: 20mm – 500mm 8620 tubes are also availabl
阅读全文

M2 Tool Steel | 1.3343 | HS-6-5-2C| SKH51

-
图片
M2 Tool Steel | 1.3343 | HS-6-5-2C| SKH51 AISI  M2 Tool Steel  is molybdenum based high-speed steel in tungsten–molybdenum series.  HSS  grade steel  M2  is a medium alloyed high speed steel which has good machinability. The H-SS M2 chemical composition gives a good combination of well-balanced toughness, wear resistance and red hardness properties. Widely used for cutting tools such as twist drills, taps, milling cutters, saws, knives etc. Also commonly used in cold work punches and dies and cutting applications involving high speed and light cuts. Grade M2 High Speed Steel is by far the most popular high speed steel replacing high speed steel grade  T1  in most applications because of its superior properties and relative economy. We are one of leading AISI M2 HSS steel supplier and we can offer better quality and M2 alloy steel price for your various applications. 1. Supply Range of M2  tool steel  High Speed M2 Steel Round Bar:  diameter 2mm – 200mm HSS M2 Steel Flat
阅读全文

What Do YOU Know About Mold Steel Quality?

-
图片
Many industries place strict requirements on the acceptable level of surface defects and imperfections that may appear on a plastic molded part. Such conditions often apply to critical components for the medical and pharmaceutical industries as well as for the manufacturers of lenses and other optical devices. However, for aesthetic reasons, many other consumer goods have similar restrictions. After all, any defect that appears on the surface of the mold steel is likely to be replicated onto the molded part. Problems associated with the texturing or polishability of a mold cavity can often be traced back to the mold steelmaking process. The material properties that have shown the greatest influence on obtaining a good surface finish are the microcleanliness level, the severity of chemical segregation and the appearance of primary carbides. The mold steel's chemical composition along with the manufacturing techniques used during its production, will determine its ability to p
阅读全文