SKD61 Hot Work Mold Steel

One. Product Description

SKD61 is a Japan Hot Work Mold Steel brand. The corresponding Chinese grade (GB/T1299-2000) is 4Cr5MoSiV1, which is the most widely used hot work mold steel. The heat treatment deformation rate is low, and the performance and service life are higher than 3Cr2W8V. It can be used for mold forging hammer forging mold, aluminum alloy Mold-casting mold, hot extrusion mold, high-speed precision forging mold and forging mold, etc.

Two. Quality Standard

GB/T1299-2000 Standard Specification

Three. Product Specifications

Four. Equivalent Grade of SKD61 Mold Steel - For Reference Only

Five. Product Features and Uses

Features:

1. Vacuum degassing refining and processing pure steel.

2. Spheroidizing annealing softening treatment, good cutting performance.

3. Specially added strengthening elements vanadium and molybdenum, excellent wear resistance.

4. SKD61 hot work mold steel has beautiful metallic luster. SKD61 series products include: SKD61 thimble, SKD61 guide post, SKD61 guide bush, SKD61 cylinder, SKD61 punch, SKD61 floating pin and other precision high temperature parts.

5. SKD61 has good toughness and high temperature fatigue resistance, can withstand temperature fusion, is suitable for long-term work at high temperature, and has good cutting performance and polishing performance. SKD61 adopts electric furnace smelting, electroslag remelting, the steel is purer and tougher. It is suitable for making aluminum, zinc, copper alloy extrusion molds, Mold casting molds, hot forging molds, hot scissors and other small bright steel (peeling, cold drawing) materials. It is an ideal material for making ejectors and cylinder SKD61 is also suitable for manufacturing High-yield plastic molds. Nitriding treatment can obtain a good hardened layer structure on the mold surface. It is very significant to improve the wear resistance and corrosion resistance of extrusion molds; for Mold casting molds, nitrogen treatment chemical treatment can be significantly improved, and the surface corrosion resistance is conducive to the rapid demoulding of products.

Use:

1. Thin plates with a thickness not exceeding 2MM, efficient blanking mold, punching mold, stamping mold.

2. All kinds of scissors, inlaid blades, woodworking blades.

3. Thread rolling mold and wear-resistant slider.

4. Cold heading mold, thermosetting resin molding mold.

5. Deep drawing mold, cold extrusion mold.

6. Automobile engine mould.

Six. Product Detailed Information

SKD61 is a medium carbon high chromium alloy tool steel. After heat treatment, it has high hardness and wear resistance, and has the characteristics of strong hardenability and good dimensional stability. It is suitable for making high-precision, long-life cold-working molds and thermosetting molds. It is often used to make scones.

SKD61 has good toughness and high temperature fatigue resistance, can withstand temperature fusion, is suitable for long-term work at high temperature, and has good cutting performance and polishing performance. SKD61 adopts electric furnace smelting, electroslag remelting, the steel is purer and tougher. It is suitable for making aluminum, zinc, copper alloy extrusion molds, Mold casting molds, hot forging molds, hot scissors and other small bright steel (peeling, cold drawing) materials. It is an ideal material for making ejectors and cylinder SKD61 is also suitable for manufacturing High-yield plastic molds. Nitriding treatment can obtain a good hardened layer structure on the mold surface. It is very significant to improve the wear resistance and corrosion resistance of extrusion molds; for Mold casting molds, nitrogen treatment and chemical treatment can significantly improve, and the surface corrosion resistance is conducive to the rapid demoulding of products.

SKD61 hot work mold steel has a beautiful metallic luster.

SKD61 series products include: SKD61 thimble, SKD61 guide post, SKD61 guide bush, SKD61 cylinder, SKD61 punch, SKD61 floating pin and other precision high temperature parts.

Performance

SKD61 hardness:

Before heat treatment, SKD61 is about: HRC 15~20 (HB200~230).

Hardness after heat treatment: Internal HRC 40~45° Surface HV1000±100.

The density of SKD61 is: 7.85 grams per cubic centimeter.

Hardness after TD treatment: internal HRC 40~45° surface HV2500 or more.

Heat treatment

Quenching:

First stage preheating: 500~550℃

Second stage preheating: 750~800℃

Blow cooling or high pressure air cooling, etc., enter the tempering furnace at 100~150℃.

Conditioning:

Preheating: 300~350℃

Tempering heating: 550~680℃

Air-cooled to room temperature and tempered three times. The quenching temperature is 1000~1050 degrees, the hardness is 50~55HRC, the heat treatment deformation is small, and the surface can be nitrided and nitrided, so that the processed products have better wear resistance.

Low temperature treatment

For maximum hardness and dimensional stability, molds are cryogenically cooled at -70 to -80°C immediately after quenching, held for 3-4 hours, and then tempered. The hardness of cryogenically treated tools or molds is 1-3 HRC higher than that of conventional heat treatment. For parts with complex shapes and large dimensional changes, cryogenic treatment has the risk of production cracking.

Nitriding treatment

After the mold or workpiece is nitrided, a hardened layer structure with high hardness and certain corrosion resistance is formed on the surface.

Mechanical behavior

Hardness: Annealed, 235~205HB, quenched, ≥50HRC