High-speed tool steel for drill bit

Abstract

The invention discloses high-speed tool steel for drill bits, which comprises the following components: 0.90-0.98% of C; 5.00-5.80% of W; 4.00-4.60% of Mo; 3,80-5.00% of Cr; 1.80-2.20% of V; 0.25-0.45% of Mn; 0.2-0.40% of Si; 0.08-0.30% of Nb; 1.30-1.60% of Co; not more than 0.03% of P; not more than 0.03% of S; and the balance of Fe. According to the invention, the using amounts of precious metal tungsten and molybdenum are reduced; a little niobium is added; the steel is provided with good application performance and processing performance; and prepared cutters have increased service life.

Description

Technical field

[0001] The invention relates to an alloy steel, which is a high-speed tool steel for drill bits, and belongs to the technical field of metallurgy. Background technique

[0002] High-speed steel is high-carbon high-alloy ledeburite steel, which contains a large amount of alloy carbides. High-speed steel has high hardness, good wear resistance, toughness and red hardness after proper heat treatment. The main purpose of high-speed steel is to manufacture machine tool cutting tools, high-end molds, high-temperature bearings, and mechanical parts that require high hardness and good wear resistance. It is widely used.

[0003] The main alloying elements of high-speed steel are tungsten, molybdenum, chromium and vanadium, etc., which are all carbide forming elements. Their reserves on the earth are limited. Among them, tungsten and molybdenum reserves are less, precious and scarce, which are national strategic materials. Must be used sparingly. However, the content of t...

Examples

Embodiment 1

[0018] A high-speed tool steel for drill bits, its components are C, W, Mo, Cr, V, Mn, Si, Nb, Co, P, S and Fe, and the weight percentage of each component is C: 0.92%; W: 5.30%; Mo: 4.60%; Cr: 4.70%; V: 1.80%; Mn: 0.25%; Si: 0.20%; Nb: 0.08%; Co: 1.32%; P: ≤0.02%; S: ≤0.007%; The sum of copper and nickel content does not exceed 0.25%; the rest is Fe.

[0019] The organization performance of this embodiment is shown in Table 1:

[0020] Table 1

[0021]

Embodiment 2

[0023] A high-speed tool steel for drill bits, the chemical composition of which is C, W, Mo, Cr, V, Mn, Si, Nb, Co, P, S and Fe, and the weight percentage of the composition range is C: 0.90%; W: 5.00% ; Mo: 4.50%; Cr: 4.55%; V: 1.90%; Mn: 0.25%; Si: 0.29%; Nb: 0.28%; Co: 1.30%; P: ≤0.03%; S: ≤0.007%; copper and The sum of nickel content does not exceed 0.25%; the rest is Fe.

[0024] The organization performance of this embodiment is shown in Table 2:

[0025] Table 2

[0026]

Embodiment 3

[0028] A high-speed tool steel for drill bits, the chemical composition of which is C, W, Mo, Cr, V, Mn, Si, Nb, Co, P, S and Fe, and the weight percentage of the composition range is C: 0.91%; W: 5.60% Mo: 4.50%; Cr: 4.91%; V: 1.85%; Mn: 0.30%; Si: 0.27%; Nb: 0.30%; Co: 1.50%; P: ≤0.03%; S: ≤0.02%; copper and The sum of nickel content does not exceed 0.25%; the rest is Fe.

[0029] The organization performance of this embodiment is shown in Table 3:

[0030] table 3

[0031]

Technical field

[0001] The invention relates to an alloy steel, which is a high-speed tool steel for drill bits, and belongs to the technical field of metallurgy. Background technique

[0002] High-speed steel is high-carbon high-alloy ledeburite steel, which contains a large amount of alloy carbides. High-speed steel has high hardness, good wear resistance, toughness and red hardness after proper heat treatment. The main purpose of high-speed steel is to manufacture machine tool cutting tools, high-end molds, high-temperature bearings, and mechanical parts that require high hardness and good wear resistance. It is widely used.

[0003] The main alloying elements of high-speed steel are tungsten, molybdenum, chromium and vanadium, etc., which are all carbide forming elements. Their reserves on the earth are limited. Among them, tungsten and molybdenum reserves are less, precious and scarce, which are national strategic materials. Must be used sparingly. However, the content of t...

Examples

Embodiment 1

[0018] A high-speed tool steel for drill bits, its components are C, W, Mo, Cr, V, Mn, Si, Nb, Co, P, S and Fe, and the weight percentage of each component is C: 0.92%; W: 5.30%; Mo: 4.60%; Cr: 4.70%; V: 1.80%; Mn: 0.25%; Si: 0.20%; Nb: 0.08%; Co: 1.32%; P: ≤0.02%; S: ≤0.007%; The sum of copper and nickel content does not exceed 0.25%; the rest is Fe.

[0019] The organization performance of this embodiment is shown in Table 1:

[0020] Table 1

[0021]

Embodiment 2

[0023] A high-speed tool steel for drill bits, the chemical composition of which is C, W, Mo, Cr, V, Mn, Si, Nb, Co, P, S and Fe, and the weight percentage of the composition range is C: 0.90%; W: 5.00% ; Mo: 4.50%; Cr: 4.55%; V: 1.90%; Mn: 0.25%; Si: 0.29%; Nb: 0.28%; Co: 1.30%; P: ≤0.03%; S: ≤0.007%; copper and The sum of nickel content does not exceed 0.25%; the rest is Fe.

[0024] The organization performance of this embodiment is shown in Table 2:

[0025] Table 2

[0026]

Embodiment 3

[0028] A high-speed tool steel for drill bits, the chemical composition of which is C, W, Mo, Cr, V, Mn, Si, Nb, Co, P, S and Fe, and the weight percentage of the composition range is C: 0.91%; W: 5.60% Mo: 4.50%; Cr: 4.91%; V: 1.85%; Mn: 0.30%; Si: 0.27%; Nb: 0.30%; Co: 1.50%; P: ≤0.03%; S: ≤0.02%; copper and The sum of nickel content does not exceed 0.25%; the rest is Fe.

[0029] The organization performance of this embodiment is shown in Table 3:

[0030] table 3

[0031]

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