49results about How to "Reduce the chance of bonding" patented technology

The invention provides an anticorrosion rebar and a production method of the anticorrosion rebar. The anticorrosion rebar comprises 0.15%-0.23% of C, 0.30%-0.65% of Si, 0.90%-1.60% of Mn, 0.030% of P or less, 0.020% of S or less, 1.40%-2.50% of Cr, 0.20%-0.40% of Cu, 0.010%-0.025% of Ti, 0.015% of N or less and 0.0020% of O or less. The electric induction furnace smelting and tapping temperature ranges from 1,650 DEG C to 1,670 DEG C, and the degree of superheat of continuous-casting molten steel is controlled to be smaller than or equal to 30 DEG C; and deoxygenation is conducted on tundish through an external electric field slag deoxygenation device, the voltage of the external electric field ranges from 5 V to 20 V, the current ranges from 600 A to 1,000 A, and the cleanliness of the molten steel is improved; the heating temperature of a rolled steel blank is controlled within the range of 1,130 DEG C to 1,170 DEG C, the heating time ranges from 1.5 h to 2.5 h, the temperature at the beginning of rolling ranges from 1,000 DEG C to 1,100 DEG C, and the finish rolling temperature ranges from 950 DEG C to 1,050 DEG C. According to the rebar, Rel is larger than or equal to 500 MPa, Rm is larger than or equal to 630 MPa, A is larger than or equal to 15%, and anticorrosion performance of the rebar is 3 to 5 times that of a HRB500 c steel rolled rebar.

The invention relates to a method for improving a carbonized wood property by silica sol impregnation pretreatment. The method comprises the following steps of: placing wood in a treatment tank, carrying out the silica sol infusion pretreatment on the wood, and carrying out stacking and air dry on the treated wood; carrying out common kiln drying on the treated wood so as to enable the water content ratio of the wood to be reduced to be 12-18%, and then discharging the dried wood out of a kiln, placing the wood after drying in charring equipment for carrying out hot modification carbonizing treatment; and finally taking out the wood. The method provided by the invention has the advantages that silica sol is adopted to be used as modification liquid so as to carry out the impregnation pretreatment on the wood, the front drying is not needed, the manufacturing cost is low, the mass loss rate of preparative carbonized wood is reduced, and the equilibrium water content is reduced; and the dimensional stability. the density and the mechanical strength are improved, corrosion proof and weather resisting properties are improved, flame retardant and termite proof properties can be improved to a certain degree, and the method has the characteristics of being odorless, innoxious, safe and environment-friendly.

The invention relates to a wafer cutting liquid which is prepared from 100 of purified water, 3 of glycerin and 0.02 of silicate by weight proportion. By changing the essential component in the existing cutting liquid from soft water to the purified water, the invention reduces the component of hard ions in the cutting liquid so as to reduce the combination probability of soft ions and hard ions,and the formation probability of grains in the cutting liquid is greatly reduced.

The invention discloses a method for preparing superfine calcium carbonate nanometer powder. According to the method, superfine calcium carbonate is prepared through a rapid precipitation method, particle diameters are controlled through the controlling of reactant concentration, dissolvent, reaction time, spraying speed and stirring speed, and precipitate is diluted by rapidly adding a large amount of deionized water after reaction, so that the probability of collision and combination of nanometer particles is reduced, and the fact that the nanometer particles have excellent monodispersity isguaranteed. The method adopts secondary ageing and secondary carbonization technologies, glucose and serine are added during secondary carbonization, and the pH value of a calcium carbonate product is reduced by controlling the dosages of glucose and serine.