5 results about "Trace Amounts" patented technology

The invention discloses a high-strength nodular cast iron for automobile flywheels and a high-density cast molding method thereof. In the high-strength nodular cast iron base, the pearlite content is 90-95%, the ferrite content is 5-10%, and meanwhile, small amounts of Mn, Ni and Cr and trace amounts of Nb are added to perform alloy reinforcement. The high-strength nodular cast iron for automobile flywheels is composed of the following alloy elements in percentage by mass: 3.2%-3.8% of C, 2.0%-2.5% of Si, 0.1%-0.5% of Mn, 0.1%-1.0% of Ni, 0.2%-1.0% of Cr, 0.01%-0.25% of Nb, at most 0.08% of P, at most 0.025% of S, 0.02%-0.06% of Mg, 0.01%-0.05% of Re and the balance of Fe. The room-temperature tensile strength of the nodular cast iron is greater than 700 MPa, the HB is greater than 280, and the 500 DEG C high-temperature tensile strength is greater than 560 MPa. The live riser is provided with two independent flat riser necks to obtain the high-density flywheel casting, and the dynamic unbalance quantity of the flywheel is lower than 1270 g.cm, thereby enhancing the dynamic balance performance and safety.

The invention relates to a poultry feedstuff with comprehensive nutrition, which comprises the following components by weight percent: 40-50 percent of dogwood material, 50-60 percent of soya bean meal material, 1-10 parts of shrimp rejects, and trace amount of modifier; and the dogwood material, the soya bean meal material and the shrimp rejects are crushed after being dried, then the modifier is added, and the obtained mixture is uniformly stirred to obtain a finished product. The poultry feedstuff adds the dogwood material, the soya bean meal material and the shrimp rejects in mixed feedstuff and realizes the comprehensive nutrition of sugar, protein and calcium in the mixed feedstuff, thus improving the quality of the feedstuff.

The invention discloses a forging method for a drive axle lifting oil cylinder. The forging method comprises the following steps: a) preparing and casting a steel ingot with the following alloy components in percentage by weight: greater than or equal to 0.32% but less than or equal to 0.42% of C, greater than or equal to 0.26% but less than or equal to 0.32% of Si, greater than or equal to 0.24% but less than or equal to 0.45% of Mn, greater than or equal to 0.08% but less than or equal to 0.18% of P, greater than or equal to trace amount but less than or equal to 0.025% of S, greater than or equal to 0.35% but less than or equal to 0.48% of Cr, greater than or equal to 0.33% but less than or equal to 0.44% of Mo, greater than or equal to 0.65% but less than or equal to 1.30% of Ti, greater than or equal to 0.08% but less than or equal to 0.20% of Sn, and the balance Fe. The forging method is convenient in blank forming, high in efficiency and easy in forging forming; the forged drive axle lifting oil cylinder is good in strength, long in service life, safe and reliable, and suitable for mass forging production of drive axle lifting oil cylinders of various models.