CBN inserts for processing HRC45-68 hardness Alloy steels, Carbon tool steels, Die steel, High speed steel

Views: Author: SCBN TOOLS Publish Time: 2022-05-26 Origin: Site

Types of Alloy steels, Carbon tool steels, Die steel
Die steel can be roughly divided into three categories: cold-rolled die steel, hot-rolled die steel and plastic die steel, which are used for forging, stamping, cutting, die-casting, etc.
Common Carbon tool steels and Die steel materials are:
(1) Anti-wear cold work die steel
They are: 6Cr4W3MoVNb, 6W6Mo5Cr4V, 7Cr7Mo3V2Si, Cr4W2MoV, Cr5Mo1V, Cr6WV, Cr12, Cr12MoV, Cr12W, Cr12Mo1V1.
(2) Shock-resistant cold work die steel
They are: 4CrW2Si, 5CrW2Si, 6CrW2Si.
(3) High carbon low alloy cold work die steel
They are: 9SiCr, 9CrWMn, CrWMn, Cr2, 9Cr2Mo, 7CrSiMnMoV, 8Cr2MnWMoVS, Cr2Mn2SiWMoV.
Characteristics of die steel and tool steel
Due to different uses and complex working conditions, the steel used for molds should have high hardness, strength, wear resistance, sufficient toughness, and high hardenability and hardenability according to the working conditions of the molds it manufactures. and other process properties.
Processing of die steel and tool steel
Due to the technological characteristics of die steel, it is difficult to process the quenched die steel. Usually, the hardness after quenching is above HRC58. The use of conventional carbide tools and ordinary CBN tools will cause jumping edges and tool wear.
Selection of die steel and tool steel processing inserts
High-speed machining of die steel requires that the tool material and the material to be processed must have a small chemical affinity, good thermal stability, impact resistance, wear resistance, thermal fatigue resistance, and excellent mechanical properties. SBH170 grade CBN insert is suitable for high-hardness materials below HRC68, such as die-hardened steel and high-hardness, and is suitable for high-speed cutting in high-speed machining centers.
SBH170 grade CBN insert characteristics

The tool tip is treated with arc angle to control the chipping and wear of the tool tip to the greatest extent.
The use of high rigidity short edge and chip flute can prevent tool vibration during machining.
Combined with high-temperature and wear-resistant coating treatment, that is, high-speed processing can still exert excellent performance.
Suitable for machining from pre-hardened steel (~HRC40) to high-hardness steel (~HRC65) mold materials.
The surface coating has a hardness of 3600HV and a high-durability coating with a starting oxidation temperature of 880°C.

Processing case
Workpiece name: forming roll
Workpiece material: die steel
Hardness: HRC60
Processing condition: Interrupted cutting
Insert material: SBH170
Processing parameters: Ap=0.1mm Fr=0.15mm/r Vc=150m/min
The processing time using SBH170 tool is 10% of the grinding process, and the degree of finish is stable at Ra0.8.