Tungsten carbide roller has characteristics of good wear resistance, high temperature red hardness, thermal fatigue resistance and thermal conductivity and high strength , have been widely used in high-speed wire rod, bar, rebar, seamless steel tubes, etc. Domestic production of tungsten carbide roller materials mostly WC- Co, WC- Co- Ni- Cr two series, and the content of Co, Co- Ni - Cr is in the range of 6wt% ~ 30wt%. From the use of perspective, tungsten carbide rollers has good mechanical properties, its flexural strength up to 2200 MPa or more, shock toughness up (4 ~ 6) × 10^6 J/ m^2, Rockwell hardness (HRA) is up to 78 to 90, widely in the high-speed wire rod rolling process, which is much higher than single-slot chilled cast steel or high speed steel rolls.Tungsten carbide is made of Tungsten Carbide Powder and binder phase (such as drilling, nickel, etc.), and then pressing and sintering, regardless of the conditions under cold rolled or hot rolled has excellent wear resistance, tungsten carbide rollers has been widely used in pre-finishing mill and finishing of high-speed wire rod currently. On the performance of tungsten carbide roller in hot-rolling wire rod , the material must meet the following requirements:
Tungsten carbide roller material design
Tungsten carbide roller category
Tungsten carbide roller production process control Carbide Roller,Carbide Ring,Mill of Rolling Line,Steel Wire Rod,Mill Rolling Finish Stand,Mill Roller Groove Type Luoyang Golden Egret Geotools Co., Ltd , https://www.xtclasercladding.com
1. Sufficient anti-fracture strength;
2. Good abrasion resistance;
3. The smooth surface finish;
4. Excellent corrosion resistance, thermal fatigue, thermal cracking performance.
Tungsten carbide roller rings can working in bad conditions , small profile rolling (especially rebar rolling) process conditions is harsher than the high-speed wire rod, and therefore corresponds to the profile rolling ,tungsten carbide rollers recommend using high binder phase carbide.
Pre-finishing all vehicles roller should ensure its high toughness, strength, rigidity and thermal conductivity, followed before considering its wear resistance. When designing each vehicles roller, pre-finishing materials should choose carbide grades of Co, Co- Ni- Cr binder content is high (greater than or equal to 25wt%) , requiring an average WC grain size of coarse (5μm ~ 6μm), to obtain a higher shock toughness, proper strength and hardness. For the finishing of the roller movements, particularly the last two rollers of the finish rolling, which suffered load is small, and high relative velocity of the material to be pressed (80 m / min ~ 120 m / min). In this case, the wear resistance of the roller to be the most important requirements, and must ensure the strength , timpact toughness and hardness of a reasonable match, so the binder of Co / Ni content ratio and the average grain WC control of particle size and other factors must have greater control in front of different pre-finishing rolling roll.
According to the structure of tungsten carbide rollers, it can be divided into solid tungsten carbide roller and composite tungsten carbide roller. Solid tungsten carbide rollers have been widely used in pre-finishing and finishing stands high speed wire rod mill (including fixed reducing the rack, pinch roller rack). Composite tungsten carbide roller is made of cemented carbide and other materials, and it can be divided into tungsten carbide composite roll rings and solid tungsten carbide Composite Roller. Tungsten carbide composite roll rings mounted on the roller shaft; solid tungsten carbide composite roller will be directly cast in the roll axis to form a whole, a large load is applied to the rolling mill.
Tungsten carbide rollers produced by powder metallurgy method, the key to its process control is the chemical composition of the material and the mixture was prepared, pressed molding, sintering and deep processing and other preparation process parameters.
1. Preparation of starting material (WC focus quality): As the WC raw material and quality control of the use of different levels of quality may fluctuate, resulting in adverse effects on microstructure.
2. Preparation of the mixture: Mixture preparation is the key to the production process of the roller, the roller of failure modes - trachoma, mainly generated by this procedure.
3. Pressing: roller pressing is an important process of the roller mill.
4. Sintering: roller sintering is to determine the final quality of the roller production processes, use of advanced low-pressure sintering technology, HIP sintering technology can greatly improve the performance of roller.
5. Deep processing: deep processing rollers have a greater impact on the quality and accuracy of the roller surface.
July 25 Shanghai steel market price quotes
Product name specification material steel factory / origin price (yuan / ton) than yesterday last week than the previous month General line Φ6.5mm Q235 Handan steel 5440 -20 -60 -80 General line Φ6.5mm Q235 Jiuquan 5440 -20 -60 - 80 High Line Φ6.5mm Q235 Pinggang 5700 -20 -100 -140 High Line Φ6.5-8mm Q235 Beitai 5680 -20 -100 -160 High Line Φ6.5-8mm Q335 Haixin 5700 -20 -100 -150 Thread Steel Φ12mm HRB335 Baosteel 5540 0 0 120 Rebar Φ14mm HRB335 Baosteel 5540 0 0 120 Rebar Φ16mm HRB335 Baosteel 5320 0 -10 30 Rebar Φ18-25mm HRB335 Baosteel 5330 0 0 40 Rebar Φ12-14mm HRB335 Shanghai Bao 5230 0 0 110 Rebar Φ18-25mm HRB335 Shanghai Bao 5100 0 -30 80 Rebar Φ16-25mm HRB335 Tang Steel 5100 0 -30 70 Rebar Φ16-25mm HRB335 2672 5220 0 -30 30 Rebar Φ16-25mm HRB335 Handan Steel 5230 0 -30 30 Rebar Φ16-25mm HRB335 Laiwu Steel 5230 0 -30 30 Rebar Φ20-25mm HRB335 Beitai 5100 0 -30 70 Rebar Φ20-25mm HRB335 Yinfeng 5100 0 -30 70 Grade III Rebar Φ10mm HRB400 Baosteel 6030 -20 - 70 -10 Class III Rebar Φ12mm HRB400 Baosteel 5680 -20 -70 -30 Class III Rebar Φ14mm HRB400 Baosteel 5680 -20 -70 -30 Class III Lo Steel Φ16mm HRB400 Baosteel 5540 -20 -70 -90 Grade III Rebar Φ20mm HRB400 Baosteel 5540 -20 -70 -90 Grade III Rebar Φ12-14mm HRB400 Ma Steel 5670 -10 -60 -30 Grade III Rebar Φ16mm HRB400 Horse Steel 5450 -10 -80 -40 Grade III Rebar Φ20mm HRB400 Ma Steel 5450 -10 -80 -40 Grade III Rebar Φ25mm HRB400 Ma Steel 5520 -10 -80 -110 Grade III Rebar Φ28-32mm HRB400 Ma Steel 5710 - 10 -70 -40 Hot rolled coil 1.5mm*1250*C ZJ330B Beaded steel 6700 0 0 0 Hot rolled coil 1.5mm*1250*C SPHC Hot rolled steel 6700 0 0 0 Hot rolled coil 2.0mm*1250*C SPHC Handan Steel 6650 0 0 0 Hot rolled coil 2.0mm*1250*C SPHC Previous 6650 0 0 0 Hot rolled coil 2.75mm*1250*C SPHC Previous 6380 0 0 30 Hot rolled coil 2.75mm*1500*C Q235 Tangsteel 6100 0 0 50 Hot rolled coil 3.0mm*1500*C Q235 Tangsteel 6100 0 0 70 Hot rolled coil 3.0mm*1250*C Q235 Shagang 6100 0 0 70 Hot rolled coil 5.5*1500*C Q235 Saddle/Bon/Don/Pack 5680 - 40 -180 -90 Hot Rolled Roll 7.5mm*1500*C Q235 Saddle/Bon/Don/Bag 5680 -40 -180 -90 Hot Rolled Roll 9.5mm*1500*C Q235 Saddle/Bon/Don/Bag 5680 -40 - 180 -90 HRC 11.5*1500*C Q235 Saddle/Bon/Don/Bag 5680 -40 -180 -90 Cold Roll 0.4mm*1000*C SPCC-SD Baosteel Benefits 7800 0 0 -50 Cold rolled coil 0.5mm*1000*C SPCC-SD Baosteel Yichang 7600 0 0 -100 Cold rolled coil 0.6mm*1000*C SPCC-SD Baosteel Yichang 7900 0 0 0 Cold rolled coil 1.0mm* 1250*C SPCC Ma Steel 6920 0 -100 -230 Cold Roll 2.0mm*1250*C SPCC Ma Steel 6920 0 -80 -180 Cold Roll 1.0mm*1250*C SPCC Handan Steel 6960 0 -70 -160 Cold Rolled Roll 1.0mm*1000*C SPCC Meigang 6950 0 0 -150 Cold rolled coil 1.0mm*1250*C SPCC Kunming 7000 0 0 -100 Cold rolled coil 1.2mm*1250*C SPCC Cold 6950 0 0 -150 Cold Rolling coil 1.0mm*1250*C ST14 Angang 7600 0 0 -100 Cold rolled coil 1.0mm*1250*C DC04 Baosteel 8200 0 0 -50 Cold rolled coil 1.0mm*1250*C SPCC Tangshan Steel 6880 0 -90 -220 Cold Rolls 1.0mm*1250*C SPCC Handan Steel 6900 0 -100 -220 Cold Rolls 1.0mm*1250*C SPCC Baotou Steel 6900 0 -100 -220 Cold Plate 1.0mm*1250*2500 DC01 Baosteel 7900 0 0 -50 Cold plate 1.0mm*1250*2500 DC01/ST12 Wugang 7000 -30 -130 -280 Cold plate 1.0mm*1250*2500 ST12 Angang Steel 1780 7070 -30 -130 -260 Cold plate 1.2mm*1250*2500 ST12 Angang 1780 6970 - 30 -150 -310 Cold Plate 1.5mm*1250*2500 DC01/ST12 Ben Steel 6930 -20 -70 -270 Cold Plate 1.5mm*1250*2500 DC01 Bao Steel 7850 0 0 -100 Cold Plate 1.5mm*1250*2500 SPCC Baosteel 7750 0 0 0 Cold Plate 1.5mm*1250*2500 DC01/ST12 Wu Steel 6930 -70 -70 -240 Cold Plate 1.5mm*1250*2500 ST12 Angang Steel 1780 6950 0 -50 -330 Hot-rolled Strip 2.5mm*183* C Q195L Jianlong 5680 0 0 -120 Hot rolled strip 2.5mm*204*C Q195L Jianlong 5680 0 0 -120 Hot rolled strip 2.5mm*232*C Q195L Jianlong 5700 0 0 -80 Hot rolled strip 2.5 Mm*160-204*C Q195-215 Tangshan Hongda 5700 0 0 -80 Hot-rolled Strip 2.75mm*232*C Q195-215 Tangshan Guofeng 5700 0 0 -100 Hot-rolled Strip 5.5mm*685*C Q235 Beitai 5740 0 0 0 Hot rolled strip 5.6mm*700*C Q235 Beitai 5740 0 0 0 Hot rolled strip 5.75mm*685*C Q235 Beitai 5740 0 0 0 Hot rolled strip 6.0mm*690*C Q235 Beitai 5740 0 0 0 Hot rolled strip 6.0mm*700*C Q235 Beitai 5740 0 0 0 Hot rolled strip 5.5mm*685*C Q235 DeLong 5780 0 0 40 Hot rolled strip 9.5mm*735*C Q235 DeLong 5780 0 0 40 Hot Rolled Strip 1.8mm*355*C Q195-235 Tianjin Roll 1 5850 0 0 -20 Hot Rolled Strip 1.8mm*292*C Q195-235 Tianjin Roll 1 5850 0 0 -20 Hot Rolled Strip 2.0 Mm*295*C Q195-235 Tianjin Roll 1580 0 0 -20 Puzhong 6mm Q235 New Steel 7450 0 0 50 Puzhong 8mm Q235 New Steel 7200 -50 -50 -50 Puzhong Medium Plate 10mm Q235 New Steel 7100 -50 -50 -50 Puzhong Plate 12mm Q235 New Steel 6550 -50 -150 -200 Puzhong Plate 14-20mm Q235 New Steel 6650 -50 -50 -50 Puzhong Plate 8mm Q345 Yingkou 7200 -50 -80 -80 Puzhong board 10mm Q345 Yingkou 7000 -50 -80 -80 Puzhong board 14-20mm Q345 Yingkou 6500 -50 -100 -150 Puzhong board 10mm Q235 Ma steel 7000 0 -50 50 Puzhong board 14-20mm Q235 Masteel 6480 0 -100 -20 Puzhong Plate 14-20mm Q235 Chunye 6100 0 0 20 Low Alloy Plate 6mm Q345 New Steel 7550 0 0 0 Low Alloy Plate 8mm Q345 New Steel 7400 0 0 0 Low Alloy Plate 10mm Q345 New Steel 7250 0 0 0 Low Alloy Plate 12mm Q345 New Steel 7050 0 0 0 Low Alloy Plate 14-20mm Q345 Yingkou 7000 -50 -50 -50 Low Alloy Plate 14-20mm Q345 Ma Steel 6950 0 0 Boiler Medium Plate 8mm 16MnG New Steel 7700 0 - 50 -50 Boiler Medium Plate 10mm 16MnG New Steel 7500 0 -50 -50 Boiler Medium Plate 12-20mm 16MnG New Steel 7250 0 -50 -50 Boiler Medium Plate 8mm 20G Pu Steel 7700 0 0 -50 Boiler Medium Plate 10mm 20G Pu Steel 7500 0 0 -50 Boiler Medium Plate 12-20mm 20G Pu Steel 7250 0 -50 -50 Vessel Medium Plate 8mm 16MnR Pu Steel 7750 0 0 -50 Vessel Medium Plate 10mm 16MnR Pu Steel 7550 0 0 -50 Vessel Medium Plate 12mm 16MnR Pu Steel 7300 0 0 -50 Container Plate 16 -20mm 16MnR Pugang 7300 0 0 -50 Vessel Medium Plate 16-20mm 16MnR Nanyang Steel 7500 0 0 100 Galvanized Roll 0.4mm*1000*C SGCC New Taizhong 7680 -40 -150 -300 Galvanized Roll 0.5mm*1000 *CSGCC New Senior Middle School 7520 -60 -160 -360 Galvanized coil 1.0mm*1000*C SGCC New Taizhong 7270 -30 -130 -310 Galvanized coil 1.0mm*1000*C ST02Z Bengang 7320 -100 -140 -280 Galvanized coil 1.0mm*1000*C ST02Z Angang 7320 -60 -180 -330 Galvanized coil 1.0mm*1250*C JY150 Wuhan Iron and Steel 7320 -60 -140 -280 Galvanized coil 1.0mm*1250*C SGCC Combined iron Steel 7320 -60 -180 -280 Galvanized coil 1.0mm*1000*C SGCC Huayu 7280 -20 -70 -320 Color coated roll 0.4mm*1000*C TST01 Baosteel 9450 0 0 -350 Colored roll 0.5mm*1000 *C TST01 Baosteel 8900 0 0 -500 Color Coil 0.5mm*1200*C TST01 Baosteel 8900 0 0 -500 Color Coil 0.6mm*1000*C TST01 Baosteel 8900 0 0 -250 Color Coil 0.6mm*1200*C TST01 Baosteel 8900 0 0 -250 Color Coil 0.42mm*1000*C CGCC New Middle School 8750 0 0 50 Color Coil 0.47mm*1000*C CGCC New Senior Middle 8550 0 0 50 Color Coil 0.5mm*1200*C TST01 Ma Steel 8600 0 0 100 Steel 50*50*5 Q235 Ma Steel 5580 -40 -70 -70 Steel 100*100*10 Q235 Ma Steel 5580 -40 -120 -120 Channel Steel 10# Q235 Steel 5700 -80 -80 -80 Channel steel 16#A Q235 Masteel 5520 -30 -110 -110 Channel steel 20#A Q235 Masteel 5580 0 -100 -100 Channel steel 32#A Q235 Laiwu Steel 5900 0 0 0 Steel 20#B Q235 WISCO 5630 0 0 0 I-beam 25#B Q235 Laiwu Steel 5850 0 0 0 I-beam 36#B Q235 Laysteel 5950 0 0 0 I-beam 40#B Q235 Laiwu Steel 5960 -70 - 70 -70 galvanized pipe 6 points *2.5 Q235 Jiangsu Guoqiang 7200 0 0 -90 galvanized pipe 1 inch *3.0 Q235 Jiangsu Guoqiang 7070 0 0 galvanized pipe 1.5 inch *3.25 Q235 Jinzhou 7180 0 0 -100 Plating Zinc tube 4 inch * 3.75 Q235 Tangshan Huayu 6900 0 0 -100 Galvanized tube 6 inch * 4.0 Q235 Wugang 6960 0 0 -100 Galvanized tube 8 inch * 5.0 Q235 Youfa 7140 0 0 -100