Hanging Chart of Microstructure Rating Standards for Mold Steel

1 Method for evaluating the free carbides, pearlite, and Weibull structure of steel (GB/T)13299-2022）

1. Free cementite rating

2 Pearlite Standard Rating

3 Wei's organization rating

8 sheets

2 Evaluation of banded structure in steel (* * * section)（GB/T34474.1-2017）

A-series rating chart

B-series rating chart

C-series rating chart

D-series rating chart

E-series rating chart

5 sheets

3 Rating chart for determination of non-metallic inclusions content in steel (GB/T10561-20)23)

A sulfide fine series coarse and fine

B Aluminum carbide fine series thickness

C silicate fine series coarse and fine

D cyclic oxide fine series coarse and fine

DS large particle spherical oxide

9 sheets

4 Metallographic examination of quenched medium carbon steel and medium carbon alloy structural steel（GB/T38720－2020）

1. Quenching microstructure

Microstructure of quenching+medium temperature tempering (450 ° C)

Microstructure of quenching+medium temperature tempering (600 ° C)

6 sheets

5 Standard rating chart for average grain size of metals（GB/T6394-2017)

1. Non twin grain (shallow corrosion) 100 times

2 twin grains (shallow corrosion) 100 times

3 twin grains (deep contrast corrosion) 75 times

Austenitic grain size in 4 steel (carburizing method) 100 times

12 sheets

6 Steel parts carburizing, quenching, tempering metallographic rating chart(GB/T25744--2010)

1. Two martensitic level diagrams for carburizing metallographic examination

2. Two residual austenite level diagrams for carburizing metallographic examination

3. Three carbide grade diagrams for carburizing metallographic examination

4. 1 image of internal oxidation morphology in carburizing metallographic examination

5. Two level diagrams of the microstructure of the core during carburizing metallographic examination

6. Spark reference diagram of alloy steel 1 sheet

7. Spark reference diagram for carbon steel 1 sheet

12 sheets

7 Metallographic Rating Standard Series Wall Chart

1. Phase diagram of Fe-C and Fe-Fe3C alloys

2. Phase diagram and heat treatment temperature of Fe-C and Fe-Fe3C alloys

3. Metallographic Rating Diagram for Induction Quenching of Steel Parts (Level 110) (JB/T9204-2008)

Martensitic Grade Diagram of 4 Medium Carbon Steel and Medium Carbon Alloy Structures (Grade 18) (JB/T9211-2008)

5. Grade diagram of residual austenite and martensite in carburized gears (18) (QC/T262-1999)

6. Diagram of carbide grades for carburized gears (grades 1-8)

7. Nitride level diagram for nitriding layer of steel parts (grades 1-5) (GB/T11354-2005)

8. Steel grade spark identification chart

9. Conversion Table for Hardness and Strength of Carbon Steel and Alloy Steel

10. Comparison Table of Hardness of Metal Materials

17 sheets

8 Wall chart of metallographic rating standards for steel die forgings （GB/T13320-2007）

Normalized microstructure rating of medium carbon structural steel (grades 1-8)

2. Normalization organization rating of carburized steel (grades 1-8)

3. Grading of quenched and tempered steel microstructure (grades 1-8)

8 sheets

9 Hanging chart of low and medium carbon steel spheroidization rating standards（JB/T5074--2007）

1. Rating of low carbon structural steel and low carbon alloy structural steel spheroidization

2. Carbon structure steel spheroidization rating

Rating of Steel Spheroids in 3 Medium Carbon Alloy Structures

3 sheets

1Microstructure rating of alloy tool steel（GB/T1299-2000）

Pearlite structure

Mesh carbide grade

2Rating of Large Carbides in High Speed Tool Steel（GB/T9943-2008）

***Grade diagram: Grade diagram of large angular carbides in tungsten based high-speed tool steel

***Grade diagram: Grade diagram of large particle carbides in molybdenum based high-speed tool steel wire

5 sheets

11 Hanging Chart of Microstructure Rating Standards for Mold Steel

1 Microstructure rating of hot work die steel（JB/T8420-2008）