Metal material and process for producing various accessories therefrom

Abstract

A metal material and its production of metal fitting thereof are disclosed. The material consists of C, Si, Mn, P, S and Ti, the total of impurity elements is <0.08%, the gold-phase is 100% of annealing ferrite, spheroidizing ratio is >85%, amount is >100 / mm2, shrinkage porosity, impurities and carbide are <1%, blanks tensile strength is >450MPa, extensibility is >20 and hardness is HB150-170. The process is carried out by isothermal quench heat treating and hydrogen nitrate treating. It's cheap and efficient, has high strength, abrasive and impact resistances, low-temperature, anti-corrosive and high-temperature operation performances.

Description

Technical field: [0001] The invention relates to a metal material and a process for producing various metal fittings with the material, including valve stem rotors, plungers, oil distribution plates and other accessories of high-pressure plunger pumps, as well as various gears, bearing bushes, bushings, sliders, The production process of bushing and cylinder liner. Background technique: [0002] At present, various mechanical parts used in domestic hydraulic industry, construction machinery, rubber and plastic machinery, cement machinery, reducer industry, automobile industry, machine tool industry and other industries, including valve stem rotor, plunger, gear oil distribution plate of high pressure plunger pump Accessories such as bearing bushes, bushings, bushings, cylinder liners, gears, gear rings, worm gears and other accessories are all selected and processed in accordance with the provisions of GB1176-87, such as aluminum brass 25-6-3- 3. The alloy grade is ZCuZn25A...

AI Technical Summary

Problems solved by technology

[0002] At present, various mechanical parts used in domestic hydraulic industry, construction machinery, rubber and plastic machinery, cement machinery, reducer industry, automobile industry, machine tool industry and other industries, including valve stem rotor, plunger, gear oil distribution plate of high pressure plunger pump Accessories such as bearing bushes, bushings, bushings, cylinder liners, gears, gear rings, worm gears and other accessories are all selected and processed in accordance with the provisions of GB1176-87, such as aluminum brass 25-6-3- 3. The alloy grade is ZCuZn25A16Fe3Mn3. The tensile strength of this material is 725-740Mpa, the elongation is 7-10, and the HB is 157. Another example is manganese brass 38-2-2. The alloy grade is ZCuZn38Mn2Pb2. The tensile strength of this material is The strength is 245-345Mpa, the elongation is about 10-18, and the HB is about 140. The above alloy materials have high strength performance, wear resistance, superior plasticity, impact resistance, seizure resistance, low temperature performance, and less than 300°C. The high temperature stable operation performance, corrosion resistance, etc. need to be selected according to the operating environment of the processed parts. In order to meet the performance requirements of different parts in various operating environments, it is necessary to produce and process various grades of cast copper alloy materials. Due to The processing performance of copper alloy is poor, and China is a country that lacks copper. Most of the above-mentioned materials rely on imports, which makes the production cost of the product high and wastes a lot of foreign exchange in the country. In addition, some accessories, such as the rotor accessories in the high-pressure plunger pump, its Most of the production materials are horizontal continuous casting nodular cast iron profiles imported from abroad, which are processed into accessories and then subjected to soft nitriding treatment. After the treatment, they are tested and qualified before being installed and used. The oil pan is made of 38CrMoALA (or other alternative steel), and it is also processed and then subjected to nitrocarburizing treatment. The high-speed friction of the plug and the oil distribution plate not only requires high wear resistance, but also prevents the locking between the friction pairs due to the bite. This combination of parts processed by various materials is not only high in cost, but also unstable in quality and unstable in operation. Stable, easy to lock, shorten the service life of accessories