1. General provisions 1. Before the pipeline is installed and constructed, the following conditions should be met: a The construction drawings and other technical documents are complete, and the drawi...
Aluminum alloy profiles basically have no national standards or non-standards, but the country has special industry specifications for construction aluminum profiles, which mainly set requirements for...
(1) The functions of lost foam casting coatings: 1) Improve the strength and stiffness of foam high ultra fine plastic molds, prevent deformation and damage, and ensure dimensional accuracy. 2) Ensure...
Hydraulic technology has been introduced into the industrial field for more than a hundred years. With the rapid development of industry, hydraulic technology is changing with each passing day. With t...
Nuclear tube technical quality 2004 agreement Φ219.16.35, Φ15910 fills the gap in domestic nuclear grade tube production and becomes the only manufacturer in the country that can produce nuclear tubes...
The subsequent quenching process of placing the workpiece in a refrigeration container and cooling it to below zero (usually -70 to -196°C) is also called cold treatment. The martensitic transformatio...
Abstract: This article introduces the application of soft starters in low-voltage and high-power reservoir pumping stations. It provides the electrical schematic diagram of the system, the main parame...
304 steel is a very common stainless steel, also called 18/8 stainless steel in the industry. Its corrosion resistance is better than 430 5 axis machining stainless steel, but the price is cheaper tha...
At present, among the drainage pumps used in coal mining working faces, there is no product specifically designed to discharge sediment. Regardless of the amount of sediment, the traditional segmented...
Cause of corrosion: The proportion of concentrated liquid in the cutting fluid is low. The pH value of the cutting fluid is too high or too low. For example, when PH>9.2, it will corrode cnc turnin...
Report name: Ilmenite beneficiation test research report in a certain place in Shandong Report format: word Completion time: April 2007 Publisher: Guo Changqing Supervising expert: Huang Kaiguo Gong M...
Cr12MoV steel has high hardenability, and those with a cross-sectional area below 300-400mm can be completely quenched. It can still maintain good hardness and wear resistance at 300-400 ℃, and has hi...
The hole types are divided into the following types according to their purpose: (1) Open pass, also known as extension, rough rolling, or compression pass. The task of this pass type is sufficient to ...
The new type of martensitic stainless steel seamless pipe KL-HP12CR for pipelines has excellent weldability, mechanical properties, and corrosion resistance. The weldability was improved by reducing t...
Yichun Tantalum Niobium Ore Dressing Plant The Yichun Tantalum and Niobium Mine is located in Yichun City, Jiangxi Province. It is a large-scale mineral deposit containing tantalum, niobium, lithium, ...
Among these 8 price indices, the main ones used for carbon steel are international (global), plate, long rod, North American, European, and Asian indices, as well as indices for stainless steel and pi...
The petrochemical industry occupies a very important position in the national economy, and chemical process pumps, as key supporting equipment, are also receiving increasing attention from people. Due...
The vast majority of limonite in nature exists in the form of 2Fe2O3 · 3H2O, in the form of amorphous, cryptocrystalline, or colloidal form. Its exterior color is yellow brown, dark brown to brownish ...
A cavity made on the forging die module that can deform the billet during forging, also known as the die chamber. The forging die groove can be divided into die forging die groove, billet making die g...
High hardness and good wear resistance. When grinding, its disadvantage is that it has a high viscosity and quickly heats up. However, it is easier to grind than any carbon steel and it is much easier...
The unit consumption of magnesium desulfurization mainly depends on the initial sulfur content, endpoint sulfur content, temperature, and weight of molten iron (the depth of molten iron inside the lad...
Lathe machines have been a fundamental part of machining for centuries, enabling the creation of precise and intricate cylindrical components. One of the key factors that determine the success of lath...
Hot roll specifications are: 2.75*1500*C, 3.0*1500*C, 3.25*1500*C, 3.5*1500*C, 3.75*1500*C, 4.25*1500*C, 4.5*1500*C, 4.75*1500 *C、5.25*1500*C、5.5*1500*C、5.75*1500*C、6.5*1500*C、7.25*1500C、7.5*1500*C、7....
40Cr steel is a medium-carbon modulated steel. Normalizing can promote spheroidization of the structure and improve the cutting performance of blanks with a hardness less than 160HBS. Tempered at a te...
The Bolan method has a history of 50 or 60 years in foreign countries in smelting micro-carbon ferrochromium. Its advantages are unmatched by the electrosilicothermal method. It has the characteristic...
A process of heating and cooling to change the metallurgical structure or mechanical properties of magnesium alloys or eliminate residual stress. Correspondingly, the commonly used heat treatment stat...
Introduction The CNC machining technology of large hydraulic turbine runner blades is one of the important signs that hydraulic turbine manufacturing has reached the advanced level in the world today....
Cold work die steel, performance and uses are close to SK3. China GB/YB standard grade CrWMn, China Taiwan CNS standard grade SKs31, Japanese JIS standard grade SKS31, Korean KS standard grade sTS31, ...
High-frequency current is used to locally heat the metal surface and weld it under the action of external force. It does not use any welding wire or flux, and can be produced continuously in large qua...
C Carbon Cr Chromium W Tungsten Mn Manganese Si Silicon V Vanadium 0.95 0.5 0.5 1.1 0.3 0.1 M238 factory specifications: hardened and tempered to 980-1080N/mm²(30-34HRC). Characteristics of M...
Quenching cracks are closely related to the type of heating furnace. The vacuum furnace is least likely to cause quenching cracks. The following are arranged in order of the difficulty and difficulty ...
I. Introduction With the development of urban construction, the improvement of people’s living standards has put forward higher requirements for drinking water quality. At the same time, in orde...
With the rapid development of my country’s steel industry, domestic iron ore resources are becoming increasingly scarce, and the available iron ore resources are becoming increasingly poor, fine...
%: C: 2.03 Si: 4.0 Mn: 7.0 Cr: 6.5 Mo: 10.5 V: 6.5 Good grinding performance Good heat treatment dimensional stability Good toughness Very good red hardness Very good wear resistance ASP60 steel is es...
Surface quenching only heat-treats the surface or part of the surface of the workpiece, so only the surface structure is changed. The structure in the core or other parts still retains its original pr...
With the development of the steel industry and chemical industry, the uses of super iron concentrate are becoming more and more extensive. Research and development of super iron concentrate have becom...