Cr12MoV Cold Work Mold Steel

One. Product Description

Cr12MoV Cold Work Mold Steel is a high wear-resistant and micro-deformed tool steel, and its hardenability, quenched and tempered hardness, wear resistance and strength are higher than Cr12. For the manufacture of various cold stamping molds and tools with large cross-sections, complex shapes and heavy working conditions, such as stamping molds, trimming molds, hemming molds, deep drawing molds for steel plates, circular saws, standard tools and gauges, thread rolling , mold, etc.

Two. Quality Standard

GJB 2294A-2014 Standard Specification

Three. Product Specifications

Four. Equivalent Grade of Cr12MoV Mold Steel - For Reference Only

Five. Product Features and Uses

Features:

With high wear resistance, hardenability, micro-deformation, high thermal stability, high bending strength and other properties.

Use:

Various tools are used for cold section manufacturing of large, complex shapes, various molds that withstand greater impact and heavy working conditions, such as: used blanking molds, trimming molds, trimming forming, deep drawing steel molds, circular saws , standard tools and measuring tools, thread rolling molds, etc.

Six. Product Detailed Information

Cr12MoV cold work mold steel is a high wear-resistant micro-deformation tool steel, with high wear resistance, hardenability, micro-deformation, high thermal stability, high bending strength and other properties. second only to high-speed steel. It is an important material for stamping molds and cold heading molds. Cr12MoV mold steel is a carbon-molybdenum lede steel, its carbon content is lower than that of Crl2 steel, and molybdenum and vanadium elements are added, so that the hot workability, impact toughness and carbide distribution of the steel are significantly improved. Cr12MoV mold steel and Compared with Cr12 mold steel, the carbon content is lower. The newly added alloying elements improve the inhomogeneity of carbides. Molybdenum Mo can reduce carbide segregation and improve hardenability. Vanadium V can refine grains and increase toughness.

Therefore, Cr12MoV mold steel has high hardenability. The section below 400mm can be completely hardened, and it can still maintain good hardness and wear resistance at 300~400℃. In addition, the custom-distributed Cr12MoV mold steel has better toughness than comparable materials on the general market, and the possibility of volume change during quenching is greatly reduced. Therefore, it has high wear resistance and good comprehensive mechanical properties.

The advantages of Cr12MoV mold steel are more suitable for the manufacture of various molds with large cross-sections, complex shapes and high impact, as well as various cold stamping tools under heavy working conditions, such as: punching molds, trimming molds, folding molds, Steel drawing molds, circular saws, standard tools and gauges, wire rolling molds, etc.

Processing:

1. Softening specifications for cold extrusion mold blanks: protected and heated with iron filings, temperature 760~780, time 10 hours, furnace cooling, hardness 196HBW, cold extrusion can be successfully completed.

2. Ordinary isothermal spheroidizing annealing specifications: 850~870℃+3~4 hours, cooling to 740~760℃+4~5 hours isothermal, air cooling hardness s241HBW, eutectic carbide grade ≤3, best isothermal temperature 740~760, time ≥4-5 hours.

3. Spheroidizing annealing specification: (86010)℃+2~4 hours, 30℃/hour cooling rate furnace cooling, (740+10)℃+4-6 hours, slow cooling to 500~600℃ with the furnace, and then out of the furnace Air-cooled. Hardness 207~255HBW.

4. Common quenching and tempering specifications: quenching temperature 1000~1050℃, oil quenching or gas quenching, hardness 260HRC, tempering temperature 160~180, tempering time 2 hours, or tempering temperature 325~375℃, tempering 2~3 Second-rate.

5. Low quenching and low tempering temperature: 950℃~1040℃, tempering temperature is about 200℃, secondary tempering.

6. High quenching and high tempering temperature: 1050~1100℃, tempering temperature is about 520℃, secondary tempering. The secondary hardening method is used for high quenching and high returning to increase the hardness, but the grains will grow.

7. Cryogenic treatment: Cr12MoV steel undergoes cryogenic treatment to precipitate highly dispersed ultrafine carbides from quenched martensite.