7results about How to "Raise Strength Index" patented technology

The invention discloses a mineral casting prepared based on modified epoxy resin. Diacid is used for modifying epoxy resin to enhance the temperature resistance of the epoxy resin. The compressive strength of the mineral casting and the bonding strength between the epoxy resin and the aggregate are enhanced in a manner of combining the curing agent and post-curing treatment; by adding the dispersed nano silicon dioxide into the epoxy resin, the damping ratio of the mineral casting is effectively improved, and the shock absorption performance of the mineral casting is enhanced.

The invention belongs to the field of textile, and relates to a linen fiber refined processing technology, which comprises the following steps: beating linen into linen, and carrying out impurity removal treatment on the linen by an impurity removal machine to remove impurities doped in the linen fiber and too short or broken fibers; after the quality of the flax raw material is improved, the flax is beaten into flax, the flax is preheated through a steam channel and then fed into a degumming tank to be soaked in a biological enzyme solution according to the bath ratio of 1: 15 for degumming treatment for 30-60 min, after degumming, the flax is cleaned through clean water added with a softener, and the cleaned flax fiber is subjected to dewatering, oiling and drying treatment; after dust removal treatment and anesthesia, opening treatment and secondary dust removal are carried out on the linen fibers through the opener, so that the use of acid and alkali reagents is completely avoided, the reaction time is shortened, the production cost and the environmental pollution degree are reduced, the environmental pollution problem caused by strong acid and strong alkali is avoided, and meanwhile, the excellent mechanical property is achieved.

The application discloses a kind of Q550D high-strength steel flat-position robot automatic welding methods, comprising the following steps: (1) carry out welding groove processing, do not leave blunt edge, and the gap of groove root is 1-3mm;(2) using solid argon-rich gas shielded welding to carry out backing layer welding;(3) using flux-cored wire CO2 gas shielded welding to carry out filling layer welding;(4) using flux-cored wire CO2 gas shielded robot automatic welding to carry out cover layer welding.The application solves the welding problem of single-sided welding double-sided forming butt joint weld under the condition of not sticking backing pad and not cleaning root, and can effectively guarantee the first-time flaw detection pass rate of butt joint weld;Using the robot automatic welding method filled with flux-cored wire shielded welding to fill or cover welding, the welding process has high degree of automation, and the appearance of weld after welding is uniformly and beautifully formed;The weld has good strength index and excellent low-temperature impact toughness index, and meets the anti-impact performance requirements of high-strength level crash barrier.

The present invention relates to a high-strength and toughness cast aluminum alloy and a preparation method and application thereof. The components of the high-strength and toughness cast aluminum alloy of the present invention are Si 4-10%, Cu 2-5%, Mg 0.3-2%, Fe 0.05-0.2%, Ti0.01-0.1%, Sb 0.02-0.1%, Bi 0.02-0.2% and Hf0.02-0.2%, and the rest is Al; the content of inevitable impurity elements is <0.15%. The high-strength and toughness cast aluminum alloy of the present invention is obtained by preheating and drying the raw materials, heating and melting in the form of pure metal or intermediate alloy, and then refining and solution heat treatment. The yield strength of the high-strength and toughness cast aluminum alloy prepared by the present invention is above 210MPa, the tensile strength is above 390MPa, and the elongation can reach above 12%; it effectively solves the problem of low strength and toughness of cast aluminum alloys and meets the needs of the automotive engineering field.

The invention provides a method for preparing natural-color semi-chemical pulp from bamboo reed, and belongs to the field of papermaking. The method makes full use of the advantages of rich fiber content and high yield of the bamboo reed, and fills the vacancy of domestic plant fiber raw materials. The technological method of the bamboo reed natural-color semi-chemical pulp gives full play to the characteristics of high bamboo reed fiber content, low raw material silicon content, low lignin content, easiness in pulping and good water filtration, develops and optimizes cooking, pulping and screening technologies, and is simple in equipment requirement and easy to popularize. The prepared bamboo reed natural-color semi-chemical pulp is excellent in tightness, ring crush resistance and tear strength, and is suitable for oil-proof paper and packaging paper products.

The invention relates to the field of slope protection and greening, and discloses a stable soil vegetation slope protection base material habitat modifier and a preparation method thereof. The invention discloses a habitat modifier for a stabilized soil vegetation slope protection base material. The habitat modifier comprises the following components in percentage by mass: 6-15% of a main body, 21-23.2% of a fertilizer, 45.5-46% of a stabilizer, 6-6.5% of a pH value regulator, 10.2-15.3% of a nutritional agent, 0.6-0.8% of an auxiliary agent and 3-3.5% of a compound microbial agent. The stabilized soil vegetation protection slope using the modifier material can neutralize the alkaline pH value of stabilized soil, and a soil acid-base environment suitable for plant growth is built; the soil porosity of the stabilized soil can be improved, and favorable conditions are created for plant growth; the microbial flora number and activity of stabilized soil can be improved, nutrient substance conversion is promoted, the stress resistance of plants is improved, and the healthy and long-acting growth capacity of plant communities is improved; the strength index of the stabilized soil vegetation slope protection can be enhanced, and the erosion resistance of the stabilized soil structure and the slope stability protection capacity are improved.

This invention relates to a method for manufacturing a reinforced concrete road cover plate with high toughness, characterized by the following specific manufacturing steps: S1: Concrete substrate preparation; S2: Cover plate pouring process; S3: Cover plate curing. The concrete cover plate provided by this invention achieves significant improvements in both lightweighting and mechanical properties. Compared to traditional reinforced concrete cover plates: while ensuring load-bearing capacity, the cover plate thickness of this invention is reduced by 62.5%, its self-weight is reduced by 70%, and its strength index is increased by 45.79%, effectively solving the problems of traditional cover plates being heavy and requiring excessive materials. Compared to a wire mesh concrete cover plate of the same size: the cover plate of this invention has a 20% lower self-weight and an 88.38% higher strength index.