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439results about How to "Good paintability" patented technology

Enamel steel for cold rolling water heater and manufacturing method thereof

The invention discloses enamel steel for a cold rolling water heater and a manufacturing process thereof. The enamel steel for cold rolling water heater comprises components as follows in percentage by weight: C: 0.01%-0.08%. Si: less than or equal to 0.03%, Mn: 0.10%-0.60%, P: less than or equal to 0.02%, S: 0.003%-0.02%, N: 0.001%-0.006%, AIs: less than or equal to 0.04%, Ti: 0.02%-0.12%, and the balance of ferrum and unavoidable impurities, wherein excess Ti content in steel is equal to Ti-(4*C+3.43*N=1.5S) which is less than or equal to 0. The manufacturing process is characterized in that the heating temperature of billet steel is 1160-1300 DEG C; the hot rolling finish rolling temperature is 850-950 DEG C; the coiling temperature of steel plates is 660-760 DEG C; the cold rolling draft is 60%-80%; the annealing temperature is 760-880 DEG C; the temperature preservation time is 60-200s; rapid cooling speed rate is 15-45 DEG C/s, planishing elongation is 0.7%-1.8%; and surface roughness is 0.7-1.9 micrometres. The invention has the advantages of excellent formability, enamel-spreadable property, pressing resistance, weldability and fish-scaling resistance, stable yield strength after enamelfiring, less cost increase, stable effect and significant economic benefits.
Owner:ANGANG STEEL CO LTD

Underwater epoxy adhesive and preparation method thereof

The invention relates to an underwater epoxy adhesive and a preparation method thereof; the adhesive contains A component and B component and comprises the following components by weight percent: 15-23% of epoxy resin E-51, 15-23% of epoxy resin E-44, 6-8% of epoxy active diluent, 2-5% of flexibilizer 304 resin, 13-20% of talcum powder, 6-9% of calcium oxide, 1.5-2.0% of organic bentonite, 2-4% of titanium dioxide, 0.5-1.0% of coupling agent, 0.3-1.0% of dispersant, 0.3-1.0% of defoaming agent, 10-15% of 1085 curing agent, 5-10% of 810 curing agent and 1.5-2.2% of curing accelerator; wherein, B component comprises 1085 curing agent, 810 curing agent and curing accelerator and the remainder is A component. The preparation method comprises the following steps: separately stirring the A component and the B component to disperse evenly, adding the B component in the A component to mix evenly and obtaining the underwater epoxy adhesive. The preparation method is simple, the product brushability is good, the curing rate is fast, the bonding strength is high, and the adhesive is resistant to water and the corrosion of acid and base and can not pollute the environment. The adhesive can be widely used to bond various building materials in the water and mending the concrete crack.
Owner:QINGDAO PACIFIC OCEANEERING CO LTD

Sintering-strippable red cast iron coating and preparation method thereof

The invention relates to a sintering-strippable low-cost red water-based cast iron coating, which is prepared by the following raw materials in percent by mass: 20-45 percent of bauxite powder or powder quartz, 0-25 percent of mullite powder, 1-6 percent of talcum powder, 1-5 percent of iron trioxide powder, 1-3 percent of suspending agent, 1.5-4.5 percent of organic binding agent, 1.5-6 percent of inorganic binding agent, 0.01-0.05 percent of wetting agent, 0.02-0.05 percent of preservative, 0.02-0.1 percent of defoaming agent, 0-0.5 percent of water reducing agent and 30-42 percent of tap water. The sintering-strippable low-cost red water-based cast iron coating has the characteristics that the raw materials are cheap and the source is wide; the product is low-cost, safe, environmental-friendly and convenient to transport; the brushing property, the flowing resistance and the leveling property of the product are good, the suspension percentage, the coating strength and the crack resistance are high and the gas evolution is low; and the sintering-stripping performance is excellent, the most part of the coating can be vastly stripped after castings are taken out of a casting box and are cooled, the defects of sand sticking, sand inclusion, sand drop, voids and the like existing the castings can be effectively avoided, and the castings with excellent surface quality can be obtained.
Owner:湖北省机电研究设计院股份公司

Water-based paint for iron casting through lost foam casting die

InactiveCN102921880AHigh temperature strengthSuitable for high temperature breathabilityFoundry mouldsFoundry coresSODIUM METAPHOSPHATECellulose
The invention discloses a water-based paint for an iron casting through a lost foam casting die. The paint comprises refractory aggregate, binders, a suspending agent, additives and a dispersing agent, wherein the refractory aggregate comprises high aluminum powder, zircon powder and pyrophyllite; the binders comprise silica sol or white emulsion, polyvinyl acetate emulsion, bentonite and sodium hexametaphosphate; the suspending agent comprises sodium carboxymethylcellulose; the additives comprise Tween, octanol, sodium carbonate, cryolite and iron oxide powder; and the dispersing agent is water. According to the paint, suitable ingredients are chosen, the content is adjusted, a suitable mixing process is adopted, and therefore performances such as normal temperature and high-temperature strength, suitable high-temperature permeability and good leveling property, suspension property and painting performance of a coating can be satisfied completely. The paint is suitable for gray iron castings with different trademarks and enables the expendable casting die to be stripped with the iron casting easily, particularly for stripping in flakiness of a sintered coating during cleaning, and the possibilities for diverse defect generation on the surface of the iron casting are reduced; and simultaneously, pollution of coating components to the environment is reduced greatly due to the selection of phosphate assistant.
Owner:XUZHOU PENGJU SNAPDRAGON ARTS & CRAFTS

Control method for increasing painting performance and surface quality of cold rolling automobile sheet

The invention relates to a control method for increasing the painting performance and the surface quality of a cold rolling automobile sheet, which belongs to the technical field of steel production and is suitable for IF (Interstitial-Free) steel cold rolling automobile sheets. The control method comprises the steps of controlling components of continuous casting slabs; improving a reheating schedule of the continuous casting slabs, wherein the time inside a furnace is from 160 to 290 min, and the tapping temperature is from 1130 to 1220 DEG C; adjusting a dephosphorization process, wherein the pressure of each dephosphorization point is from 17 to 22 MPa; optimizing rolling temperature, wherein the outlet temperature for rough rolling is from 1020 to 1100 DEG C, and the final rolling temperature is from 900 to 940 DEG C; optimizing a continuous annealing process, wherein the O content of each zone of the furnace is from 0 to 20 ppm, the dew point temperature is from -70 to -40 DEG C, the H2 content is from 2% to 5%, the continuous annealing heating temperature is from 760 to 830 DEG C, an Ra value is from 0.7 to 1.3 mum after flattening, and an Rpc value is from 60 to 130. The control method has the advantages that existing equipment does not need to be upgraded, the components of the casting slabs are designed, and the processes are optimized, so that the surface quality and the painting performance of the cold rolling automobile sheet are effectively increased.
Owner:SHOUGANG CORPORATION
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