Material name: high-speed tool steel bar

Brand: w 18cr4v

Standard: gb/t 9943- 1988

● Characteristics and application scope of W18Cr4V high speed steel;

It is a widely used tungsten general high-speed steel with high hardness, high red hardness and high temperature hardness, and is easy to grind. It is suitable for cutting tools that can still maintain cutting performance when the working temperature is lower than 600℃, such as turning, planing, milling, reaming, drawing, drilling bits, various gear tools, taps, dies, etc. , suitable for processing soft or medium hardness (below 300 ~ 320 HB) materials. Manufacturing high-temperature wear-resistant mechanical parts.

● chemical composition of w18cr4v high speed steel;

C: 0.70 ~ 0.80 (allowable deviation: 0.0 1)

Silicon Si: 0.20 ~ 0.40 (allowable deviation: 0.05)

Manganese Mn: 0. 10 ~ 0.40 (allowable deviation: 0.04)

Sulfur content: ≤ 0.030

Phosphorus P: ≤ 0.030

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

Nickel Ni: allowable residual content ≤0.30.

Copper and copper: allowable residual content ≤0.25.

Vanadium V: 1.00 ~ 1.40 (allowable deviation: 0.05)

Molybdenum Mo: ≤ 0.30 (allowable deviation: size ≤ 6,0.05; Size > 6,0 0. 10/0)

W: 17.50 ~ 19.00 (allowable deviation: size ≤10,0.10; > 10, 0.20)

● Mechanical properties of W18Cr4V high speed steel;

Hardness: ex-factory hardness: (other processing methods) ≤ 269 HB; (Annealing) ≤255hb. The heat treatment system and quenching and tempering hardness of the sample: ≥63hrc.

● Heat treatment specification and metallographic structure of W18Cr4V high speed steel;

Heat treatment specification: quenching, preheating at 820 ~ 870℃, 1270 ~ 1285℃ heating (salt bath furnace) or 1270 ~ 1285℃ heating (box furnace), 550 ~ 570.

●w 18cr4v high-speed steel 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 polished by peeling, light drawing, grinding or annealing.