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J
uly
2011
www.read-tpt.com›
A
rticle
Test result:
Friction coefficient
Figure 10:
The average friction coefficient of the materials
Wear quantum of volume
Figure 11:
Wear quantum of volume of materials
Figure 12:
Average wear quantum of volume of materials
No.
Material
Sample No.
Tensile Strength MPa
Impact Toughness J/cm
2
Data
Average Data
Data
Average Data
A
X155CrVMo121
1
732.7
711
4
3
2
717.1
2.1
3
683.3
3
B
D2
1
745.5
733
2.3
3.1
2
771
3.5
3
683
3.5
C
SKD11
1
1038.9
1157
12.3
12.8
2
1111.7
9
3
1320.8
17
D
high chromium alloy
(casting state, eliminated stress temper)
1
511
500
11
13.5
2
503
14.6
3
485.9
14.8
E
high chromium alloy
(quenching, temper state)
1
557
540
7
7.5
2
511
8.5
3
552.2
6.9
Table 1:
Mechanics property test for material sample
Material, formed method of roll block Straightening quantity by wear 1mm
on radius direction of roll
X155CrVMo121 forging steel roll
10,000 ton
high chromium alloy casting roll
12,000 ton
Table 2:
The contrast of rolls’ wear resistance property of hot straightening
Material, formed method of roll block Straightening quantity by wear 1mm
on radius direction of roll
X165CrMoV12KU forging steel roll
18,000 pieces
9Cr2Mo forging steel roll
18,000 pieces
high chromium alloy casting roll
38,200 pieces
Table 3:
Contrast of rolls’ wear resistance property of cold straightening
4. Popularisation and utilisation
High chromium alloy cast roll has been exported to Korea, Israel,
Kazakstan, South Africa, India, Russia, Oman, etc, and it has
been applied by tens of large size metallurgical enterprises and
machinery manufacture enterprises. More than twenty of the above
mentioned enterprises are listed in top five hundred enterprises of
manufacturing industry of China. In China the market share of high
chromium alloy straightening roll for seamless pipe is up to 80%,
and all the advanced mills and key enterprises producing seamless
pipes have been covered.
5. Conclusion
High chromium alloy casting rolls for pipe straightening, HFW/
ERW welding pipe and cold roll forming steel, researched and
developed by Shandong Province Sifang Technical Development
Co Ltd, successfully meet the requirements of producing high-grade
alloy pipe and fit the advanced steel pipe production mills. The
utilisation property and service life of high chromium alloy casting
roll is comparable to the forged steel rolls made of materials as
D2, X155CrVMo121 and SKD11. Compared with forged steel rolls,