CHƯƠNG 5 VLCK
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Engineering
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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Vật liệu có ký hiệu là BK8 (WCCo8) là:
Thép gió
Hợp kim cứng một Cabcit
Hợp kim cứng hai Cabcit
Hợp kim cứng ba Cabcit
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hợp kim cứng có ký hiệu TT10K8 thì hàm lượng cabcit vonfram (WC) trong nó là:
10%
8%
18%
82%
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Độ cứng của các loại hợp kim cứng đạt:
200 HB
60 – 62 HRC
70 – 75 HRC
Cả a, b, c đều sai
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dao cắt tốc độ cao, có tính cứng nóng từ 900 – 1000oC được làm từ vật liệu nào:
Thép carbon dụng cụ
Thép hợp kim dụng cụ
Thép gió
Hợp kim cứng hai Cabcit
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Vật liệu nào làm dao cắt tốt nhất?
WCCo8
90W9Cr4V2Mo
90CrSi
140CrWV5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn vật liệu làm dao cắt năng suất cao nhất?
90CrSi
90W9Cr4V2Mo
80W18Cr4Vmo
WCTiC15Co6
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Thành phần của hợp kim cứng một các bít bao gồm:
VC và Co
TaC và Co
WC và Co
TiC và Co
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