The annealing process of W6Mo5Cr4V2 steel (nail clipper and punch) before and after forging and how to quench it are asked.

W6Mo5Cr4V2 high-speed tool steel, short for high-tech steel or high-speed steel, commonly known as "front steel" or "wind steel", is a high-carbon and high-alloy tool steel suitable for high-speed cutting.

trait

Its outstanding characteristics are high hardness, wear resistance and thermal hardness (also known as red hardness). When the tool temperature is as high as 500~600℃, the hardness still does not decrease obviously, and it can cut at a higher speed than low alloy tool steel. It is mainly used to manufacture various cutting tools with high cutting speed, heavy load and high working temperature, such as turning tools, milling cutters, hobs, planers, broaches, drills and drills. Implementation standard: standard: GB/T 9943-2008.

Physical and chemical characteristics

physical features

W6Mo5Cr4V2 steel is the representative steel of tungsten-molybdenum universal high-speed steel. The steel has fine and uniform carbides, high toughness and good thermoplasticity. Because of the relationship between resources and price, many countries have replaced W 18Cr4V steel as the main steel type of high-speed steel.

application area

The toughness, wear resistance and thermoplasticity of W6Mo5Cr4V2 high speed steel are better than those of W 18Cr4V, while the hardness, red hardness and high temperature hardness are equivalent to those of W 18Cr4V. Therefore, W6Mo5Cr4V2 high-speed steel can be used not only to manufacture all kinds of general tools, but also to manufacture large and thermoplastic forming tools. Because of its high strength and good wear resistance, W6Mo5Cr4V2 steel can be used to manufacture wear-resistant parts under high load, such as cold extrusion dies. However, at this time, the quenching temperature must be reduced appropriately to meet the requirements of strength and toughness. W6Mo5Cr4V2 high speed steel is easy to be oxidized and decarbonized, which should be paid attention to during hot working and heat treatment.

W6Mo5Cr4V2 steel, called W6 or 6542 for short, is the representative steel of W-Mo series general high-speed steel. It is a kind of high alloy steel containing many alloying elements, belonging to ledeburite type steel. It has high hardness, high wear resistance, high thermal hardness, high hardenability, sufficient plasticity and toughness, and good casting, forging, welding and machining properties, so it occupies an important position in tool steel.

Steel grade (GB) USA (AISI) Japan (JIS) France (NF) Germany (DIN)

w6 mo 5 Cr 4v 2 M2 SKH 5 1 HS6-5-2 1.3343s

The density of W6Mo5Cr4V2 steel is 8.16t/m3; The elastic modulus e is 2 18000MPa.

tangible property

Delivery hardness: (other processing methods) ≤ 262 HB; (Annealing) ≤255HB. The heat treatment system and hardening and tempering hardness of the samples are ≥63HRC (box furnace) and ≥64HRC (salt bath furnace).

chemical composition

Brand: w6mo5cr4v2; ; (chemical composition percentage)

Manganese Mn: 0. 15 ~ 0.40 (allowable deviation: +0.04) sulfur S: ≤ 0.030.

Phosphorus P: ≤ 0.030

Chromium Cr: 3.80 ~ 4.40 (allowable deviation: 0.05)

Nickel Ni: allowable residual content ≤0.30.

Vanadium v: 1.75 ~ 2.20 (allowable deviation: 0.05)

Molybdenum Mo: 4.50 ~ 5.50 (allowable deviation: size ≤ 6,0.05; Size > 6,0 0. 10/0)

W: 5.50 ~ 6.75 (allowable deviation: size ≤10,0.10; Size > 10, 0.20)

Note: According to the agreement between the supplier and the buyer, the content of V can be 1.60 ~ 2.20.

mechanical character

Hardness of delivered steel and tempering hardness of sample solution: delivered hardness HBW is less than or equal to (other processing methods: 262, annealing: 255);

Heat treatment technology

Preheating temperature: 730~840 degrees Celsius; Quenching temperature: (salt bath furnace 12 10~ 1230, box furnace1210 ~1230); Quenching: oil; Tempering temperature is 540~560 degrees Celsius; HRC (box furnace 63, salt bath furnace 64). Delivery status: the hot rolled, forged and cold-drawn steel bars are delivered in the annealed state, and the hot rolled and forged steel bars are delivered after annealing and other processing methods (peeling, light drawing, grinding or polishing, etc.). ).