Tungsten carbide roll ring has characteristics of good wear resistance, high temperature red hardness, thermal fatigue resistance and thermal conductivity and high strength, it is a key component of high-speed wire rod rolling. Tungsten carbide roll ring is mainly used for high-speed wire rod mill pre-finishing unit, and finishing units, reducing sizing unit, rolling play area and improve the performance of rolling material effect decreases. Tungsten carbide roll ring line production to meet the needs of making various types of high carbon steel, alloy steel and special steel. Tungsten carbide roll ring material is developed on the basis of the tungsten carbide tool material, it is made of refractory metal compound (WC) as a matrix, and transition metals (Co, Fe, Ni) as the binder phase. Tungsten carbide roll ring has good abrasion resistance, high-temperature red hardness, thermal conductivity and high temperature strength and other characteristics, it has been widely used in making high-speed wire rod, bar, rebar, and other rolling seamless steel pipe production. During normal use, the surface due to the impact of high frequency alternating thermal shock and hot water fog and thermal fatigue cracking, commonly known as crack, different forms of wear or fracture failure is the main reason in this case appears thermal fatigue crack initiation and propagation. When the groove face cracked it must be grinded to prevent crack propagation caused by abnormal breakage roller ring. Tungsten carbide roll rings performance requirements When the roller ring used, the roll diameter roller ring is smallest , and line the fastest, roll ring subjected to thermal shock highest frequency. Therefore, it requires roll ring material having excellent abrasion resistance to ensure the dimensions of finished wire after a certain amount of rolling ; and requires a high fracture toughness to resist the thermal expansion of the higher frequency shocks caused thermal fatigue cracks; the same time, need to have a high thermal conductivity to suppress thermal fatigue crack initiation. During use, the maximum operating speed of tungsten carbide roll rings up to 18000 r / min, and rolling up to the maximum temperature of the contact 1200 ¡æ. It is in this harsh working conditions, the roller ring wear resistance, toughness, resistance to thermal fatigue performance high demands. To achieve these performance requirements, often using coarse-grained low cobalt grades roller ring, such as WC-6% Co. Tungsten carbide roll ring characteristics 1. Contains a microscopic hard spots, have a high resistance to abrasion 2. The macro-hardness is high, up to 69 ~ 81HRC or more. 3. Material hardening tendency serious. 4. Material with low thermal conductivity. 5. High intensity of the material. 6. Stable chemical properties, very high melting point. Tungsten carbide roll ring using requirements Heap of steel rolling process is inevitable accident, the heap of steel rolling various causes overheating will cause the roller ring side, while at the other side of the water-cooled quenching effect, causing the roll surface heat cracks, restoring rolling when this heat leaving the roller ring rapid crack propagation easily cracked. Because rolling at high speed rolling finishing train, the temperature is high, when the stack of steel metal deposited on the roller ring groove around, due to the effect of high temperature molten metal ring attached to the roller surface, forming a "product turtle" phenomenon. In this case, local heating roller ring, resulting in heat stress, heat fatigue easily formed, if the roller ring continued use, the potential cause fracture failure. Remove the stack of steel roll ring, regardless of the groove is available, should be re-grinding, in order to eliminate the stress roll ring to prevent thermal fatigue crack initiation and propagation. Tungsten carbide roller ring has good heat conduction properties, down less hardness at high temperature, good thermal fatigue resistance, wear resistance, high strength, and other characteristics,so it is suitable for high speed rolling, and it become the good choice for roller ring.
The composite roll is that cemented carbide roll rings and steel shaft are compounded into a whole through the special method, which is used for rolling round steel, screw steel, flat steel and angle steel, etc. We can supply various specifications of composite roll with |¦Ì300-500mm and 30-150mm of thickness. Our company possesses powerful R&D experience on cemented carbide roll ring. We develop a new pre-stressed composite roll independently. The roll has these characteristics: excellent structure, advanced manufacturing technology, is safe and reliable during use, big feed quantity of single groove, small quantity of grinding. It resolves the large-diameter roll ring application problems successfully. Advantages of composite roll The quality of steel products can be promoted. The surface quality and tolerance of products can be thoroughly improved. The negative deviation can be controlled more precisely. The change frequency of groove and roll can be reduced. The downtime can be shorted. The labor intensity can be reduced in rolling workshop. Increasing productivity and output can create greater economic benefit at the same time. The rejection rate of products can be reduced. Greatly reducing the steel cost for per ton is effectively way for enterprise to reduce cost and increase benefits.
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 ~ ;¡§¡é 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: 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. Tungsten carbide roller material design 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 (5|¡§¬m ~ 6|¡§¬m), 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. Tungsten carbide roller category 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 roller production process control 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.
The three dimensional carbide roll rings is the main products of tongda, our three dimensional carbide roll rings is used in reinforcement wire cold rolling and forming, we had more than 15 years experience to processing the three dimensional carbide roll rings, and exported to 21 countries for more than 8 years, till now, 0 complain of the quality. Our three dimensional carbide roll rings include PR,CA,CO,RT,RO,FO type. Also could make it as per customer requirements. The three dimensional carbide roll rings blanks we used are sintered in HIP furnace, 100% virgin material. Application Requirements 3-Dimensional Cemented Carbide Roll Rings 1.Any striking on and collision with roll rings is strictly prohibited. 2.When in installing the whole assembly pf roll rings, the clearance of the bearings should be on the tighter side. 3.The precision of rotation of the whole assembly(circular runout and runout)should be kept within ¡¨¤0.05mm. 4.The fitting of the whole assembly and the roll rings shall be a transitional fitting and fastened. 5. The roll rings should not be cooled by water or oil water emulsion. 6. The joints of the pipes in the internal cooling system should not be leaky and it is advisable that no inner cooling is applied.
1. Material: stabilized zirconia, zircon sand, alumina, graphite, aluminum phosphate monobasic acid prime wood. 2. The structural principle: the tundish nozzle is a combination of inner core and exterior. The inner core is made of stabilized zirconia and zircon sand, producing through molding machines and high-temperature calcination. The exterior is made of zirconium and corundum, producing through molding machines and low-temperature baking. Tundish nozzle is located at the bottom of the tundish, it's the channel of liquid steel to flow from the tundish into the crystallizer. 3. Function of the tundish nozzle 1). Convey molten steel; 2). Control the flow rate of molten steel. Tundish nozzle is an important component of continuous casting. Through the tundish nozzle, the molten steel flows from the tundish into the crystallizer. During this process, the outlet aperture will be eroded and widened, the amount of molten steel per unit of time increases and the surface of molten steel in the crystallizer rises, which requires increasing casting speed to digest the excess molten steel. With the further erode and widen of outlet aperture, adjusting casting speed can not digest all the excess molten steel, then releasing the excess molten steel through the mouth of the emergency is adopted though it's a waste of steel enterprises. Therefore, whether the outlet aperture of tundish nozzle remains constant is a most important measure of the quality. Usually, it is measured through the total use time in actual production. Our tundish nozzle has the properties of high refractoriness, good resistance to erosion, and can bear rushing scour etc. Our customer included new shalimar, shalimar, murtza, punjab.
En steel; 2. Control the flow rate of molten steel. Tundish nozzle is an important component of continuous casting. Through the tundish nozzle, the molten steel flows from the tundish into the crystallizer. During this process, the outlet aperture will be eroded and widened, the amount of molten steel per unit of time increases and the surface of molten steel in the crystallizer rises, which requires increasing casting speed to digest the excess molten steel. With the further erode and widen of outlet aperture, adjusting casting speed can not digest all the excess molten steel, then releasing the excess molten steel through the mouth of the emergency is adopted though it's a waste of steel enterprises. Therefore, whether the outlet aperture of tundish nozzle remains constant is a most important measure of the quality. Usually, it is measured through the total use time in actual production. Our tundish nozzle has the properties of high refractoriness, good resistance to erosion, and can bear rushing scour etc. Our customer included new shalimar, shalimar, murtza, punjab.
Bosch no., stamping no. 0 434 200 002, dn4s2 093400-6320, dlla154pn005 093400-6360, dlla154pn067 093400-6370, dlla157pn069 093400-6400, dlla154pn061 093400-6800, dlla154pn058 093400-6870, dlla154pn062 093400-7080, dlla154pn006 093400-8030, dlla160pn010 093400-8040, dlla154pn116 093400-8370, dlla154pn0171 Zexel no., stamping no. 105025-0120, dlla145sm012 , 105025-0290, dlla153sm029 105025-0490, dlla155sm049 105025-0660, dlla155sm066 105025-0800, dlla160sm080 105025-0840, dlla160sm084 105025-1170, dlla150sm117 105025-1390, dlla156sm 139a, 105025-1420, dlla155sm142, 105025-1740, dlla155sm174 Product advantage: 1.Optimize atomization 2.Strong r&d capability 3.Strictly quality control Product material: high speed steel Service:fast delivery with best services All parts warranty time is one year, in the warranty time if the goods not ok, we will send you new ones or compensate.Goods can be sent in 3 to 5 working days. The packing can be bosch, denso, zexel, delphi, cat, lucas, stanadyne, ambac, seven, caterpillar, cummins , yanmar, dp and so on. Or upon your requirement.
Product advantage: 1.Optimize atomization 2.Strong r&d capability 3.Strictly quality control Product material: high speed steel Service:fast delivery with best services All parts warranty time is one year, in the warranty time if the goods not ok, we will send you new ones or compensate.Goods can be sent in 3 to 5 working days. The packing can be bosch, denso, zexel, delphi, cat, lucas, stanadyne, ambac, seven, caterpillar, cummins , yanmar, dp and so on. Or upon your requirement.
"dongguan yangling electronics trading co., ltd." was located in chang'an town, dongguan city which been endowed with "the star yownship" in china. Mainly engaged in smt equipments, smt consumables, smt spare parts, Smt lubricants and processing of smt, we also do selling and recycling of Smt machines. For many years, we kept close and friendly business reationships With some well-known suppliers of smt line and offer advanced production equipment, electronic instruments, accessories and consumables for oem and Ems factories. Fine carton
093400-6270 093400-6490 093400-6570 093400-6740 093400-6410 093400-6420 093400-6440 093400-6670 093400-6430 093400-7000 093400-8540 093400-8640 103204-53000 103200-53000 Neutral, bosch, denso, zexel, delphi, stanadyne, lucas, dp, daewoo, ambac, seven, etc
093400-6270 093400-6490 093400-6570 093400-6740 093400-6410 093400-6420 093400-6440 093400-6670 093400-6430 093400-7000 093400-8540 093400-8640 103204-53000 103200-53000 Neutral, bosch, denso, zexel, delphi, stanadyne, lucas, dp, daewoo, ambac, seven, etc
093400-6270 093400-6490 093400-6570 093400-6740 093400-6410 093400-6420 093400-6440 093400-6670 093400-6430 093400-7000 093400-8540 093400-8640 103204-53000 103200-53000 Neutral, bosch, denso, zexel, delphi, stanadyne, lucas, dp, daewoo, ambac, seven, etc
Awt hot runner system co., ltd, founded in 2010, is specialized in the hot runner system which includes development, design, production and sales management. We provide complete hot runner solutions and innovative hot runner system to our customers! awt team with our senior engineers and technicians is an elite organization. Many of them worked in world famous hot runner enterprises before. Each product from design to product delivery, all pass strict product testing in order to provide our customer not just satisfactory but excellent and efficient system. Since awt founded, our company was engaged in high quality hot runner technology and high-end customer, and widely developed specialized hot runner system markets in medical/package, integrate auto and engineering injection, awt founded excellent cooperation relations with many famous branded customers all over the world as well, awt products and its service after-sale received favourable feedback; We are a company with a high quality management system and quality control standard, we survive by our high technology and develop our business with proficiency. Rigorous is our pragmatic style team, our purpose is customer with satisfaction; we will keep on improving, and try to be your best hot runner system service partner. Presently, at the same time of developing more markets like america-europe, russia and asia, we also go in for getting more region hot runner cooperators or agencies as our partner, we prefer to your join anytime, welcome!
Sahy-vsa/b series boron carbide long venture nozzles This nozzle is designed for job where the nozzle is generally 8 or more inches away from the surface being blasted. For high production jobs-expect longer nozzle life. Aluminum or nylon jacket and threads. Thread style: Sahy-vsa series 1-1/4 , 11-1/2 n.P.S.M. Sahy-vsb series 2 , 4-1/2 u.N.C. Technology: hot press & ordinary press Carton
Nafcm1 Philips smt nozzle 0.88mmx0.50mm(custom) 946602747001 0.95mm¡á0.55mm(pa2747/00) 946602747201 1.3mm¡á0.88mm(pa2747/20) 946602747301 2.5mm¡á1.5mm(pa2747/30)nz. Samples Free Philips smt nozzle 0.88mmx0.50mm
We lomoj are original manufacture for waterjet cutting nozzle. Our nozzle is best quality in the world. It's longer life than any other brand nozzle!lomojhan
We lomoj are original manufacture for waterjet cutting nozzle. Our nozzle is best quality in the world. It's longer life than any other brand nozzle!skype:lomojhan All kinds
We lomoj are original manufacture for waterjet cutting nozzle. Our nozzle is best quality in the world. It's longer life than any other brand nozzle!lomojhan
Desc.: 1/2" Garden Hose Nozzle Basic Set Item No.: HT1239 Including: adjustable hose nozzle, 1/2" hose connector, 1/2" hose connector with stop, 1/2"-3/4" tap adaptor Packing: blister card Pcs/ctn: 48 Ctn size: 51*33.5*27cm NW/GW: 8/10kg Pcs 20'/40'FCL: 30000/61680.
Desc.: 3-Adjustable Spraying Patterns Metal-Jet Pistol Garden Hose Nozzle Item No.: HT1335 Quick change patterns; Heavy duty construction. Size: 5-1/2" Packing: tie on card Pcs/ctn: 36 Ctn size: 51*26*52cm NW/GW: 15/16kg Pcs 20'/40'FCL: 13500/27100.
