Homework Help is Here – Start Your Trial Now!
Engineering
Mechanical Engineering
Q2: Determine the best quenching medium to produce a minimum hardness of HRC 40 at the center of a 3.75 cm diameter 4320 steel bar.

Q2: Determine the best quenching medium to produce a minimum hardness of HRC 40 at the center of a 3.75 cm diameter 4320 steel bar.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
See similar textbooks
icon
Related questions
Question

Q1: 1.5 in diameter steel part is quenched in oil with no agitation. (H=0.20). If we use a 4340; 4140; 8640; 5140; 1040 steel, what would be the hardness number at the center of the part?

 

Q2: Determine the best quenching medium to produce a minimum hardness of HRC 40 at the center of a 3.75 cm diameter 4320 steel bar.

Q1: 1.5 in diameter steel part is quenched in oil with no agitation. (H=0.20). If we use a 4340; 4140; 8640; 5140; 1040 steel, what would be the hardness number at the center of the part? Q2: Determine the best quenching medium to produce a minimum hardness of HRC 40 at the center of a 3.75 cm diameter 4320 steel bar. Given Cooling rate at 700°C (1300°F) 70C 490 305125 56 33 16.3 10 7 5.1 3.5 F 270170 70 31 18 9 5.6 3.9 2.8 2 "Os 100 60 4340 50 4340 80 50 50 40 4140 8640 8640 9310 1080 30 5140 30 1040 4320 20 1050 10 20 30 40 50 mm 20 I 1 1 14 1ị 2 in. 10 20 30 Distance from quenched end Jominy distance (th of an inch) 6.5 6.0 -0.0 TABLE I The H coefficient, or severity of the quench, for several quenching media 55 5.0 Cooling Rate at the Center of a 1-in. Bar ("C/s) 0.50 4.5 Medium H Coefficient 0.35 4.0 18 Oil (no agitation) Oil (agitation) H20 (no agitation) H20 (agitation) Brine (no agitation) Brine (agitation) 0.25 3.5 0.20 1.0 45 3.0 1.0 45 2.5 4.0 190 2.0 2.0 90 Round bors 5.0 230 1. DISTANCE FROM QUENCHED END (IN.) DIAMETER (IN.) Hardness, HRC H-FACTOR Percent martensite Rockwell C hardness
Transcribed Image Text:Q1: 1.5 in diameter steel part is quenched in oil with no agitation. (H=0.20). If we use a 4340; 4140; 8640; 5140; 1040 steel, what would be the hardness number at the center of the part? Q2: Determine the best quenching medium to produce a minimum hardness of HRC 40 at the center of a 3.75 cm diameter 4320 steel bar. Given Cooling rate at 700°C (1300°F) 70C 490 305125 56 33 16.3 10 7 5.1 3.5 F 270170 70 31 18 9 5.6 3.9 2.8 2 "Os 100 60 4340 50 4340 80 50 50 40 4140 8640 8640 9310 1080 30 5140 30 1040 4320 20 1050 10 20 30 40 50 mm 20 I 1 1 14 1ị 2 in. 10 20 30 Distance from quenched end Jominy distance (th of an inch) 6.5 6.0 -0.0 TABLE I The H coefficient, or severity of the quench, for several quenching media 55 5.0 Cooling Rate at the Center of a 1-in. Bar ("C/s) 0.50 4.5 Medium H Coefficient 0.35 4.0 18 Oil (no agitation) Oil (agitation) H20 (no agitation) H20 (agitation) Brine (no agitation) Brine (agitation) 0.25 3.5 0.20 1.0 45 3.0 1.0 45 2.5 4.0 190 2.0 2.0 90 Round bors 5.0 230 1. DISTANCE FROM QUENCHED END (IN.) DIAMETER (IN.) Hardness, HRC H-FACTOR Percent martensite Rockwell C hardness
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Types of Properties of Engineering Materials
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY
SEE MORE TEXTBOOKS