126results about How to "Consistent hardness" patented technology

The invention discloses a welding material for quickly welding and repairing defects of large-sized QT500-7 nodular cast iron parts, comprising powder components including, by weight percent, from 30 to 35% of Fe2O3, from 25 to 30% of Al, from 1.4 to 1.6% of Na2CO3, from 4 to 6% of Na2B4O7, from 4 to 6% of CaF2, from 5 to 8% of CaO, from 0.5 to 1.5% of SiO2, from 5.0 to 7.0% of graphite, from 4.0 to 5.0% of 75Si-Fe, from 1.0 to 2.0% of 75Mn-Fe, from 0.5 to 2% of Ni, from 0.1 to 0.3% of Bi, from 1.0 to 2.0% of 60Si-Ca, from 0.3 to 0.8% of RE-Mg and from 7 to 10% of Q14 pig iron which are uniformly mixed. The total weight percent of the powder components is 100%. The invention further discloses a method for quickly welding and repairing the defects of the large-sized QT500-7 nodular cast iron parts by the aid of the welding material. By the aid of the material and the method, the QT500-7 nodular cast iron parts can be quickly welded and repaired at room temperature, probability of chills and cracks can be effectively, and ingredients, structures and colors of weld joints are basically consistent to those of the nodular cast iron parts.

The invention discloses an integral abrasion resistant anti-ageing comb-shaped carrier roller for a belt conveyer. The integral abrasion resistant anti-ageing comb-shaped carrier roller comprises a carrier roller shaft, a carrier roller cylinder and an outer ring, wherein bearings are mounted at the two ends of the carrier roller shaft; the bearings are wrapped with the carrier roller cylinder; the carrier roller cylinder rotates around the carrier roller shaft; the outer ring fixed outside the carrier roller cylinder is an integral rubber comb-shaped ring; sealing parts are arranged outside the bearings; crests of comb-shaped ripples of the integral rubber comb-shaped ring are circular horns; cross sections of the ripples are isosceles triangles; a plurality of groups of comb-shaped ripples are formed on the integral rubber comb-shaped ring; and each group has 2 to 5 ripples. According to the integral abrasion resistant anti-ageing comb-shaped carrier roller for the belt conveyer, the carrier roller shaft, the bearings, the sealing parts, the carrier roller cylinder and the integral rubber comb-shaped ring are manufactured or purchased according to size and precision requirements, and then, all the parts are assembled into the integral abrasion resistant anti-ageing comb-shaped carrier roller for the belt conveyer; the outer layer is an integral structure, so that the defect that once one external part is damaged, the other external parts are damaged is avoided; and the structure is reasonable, the stress is uniform, a belt is not damaged, the sealing performance is good, the integral abrasion resistant anti-ageing comb-shaped carrier roller is abrasion resistant, corrosion resistant and anti-ageing, the service life is long, the cost is low, and the changing and utilization are convenient.