(226 products available)
A pit type carburizing furnace is a type of heat treatment furnace used to carburize low carbon steel. There are three main types of these furnaces, which include the integral quench (IQ) furnace, the endothermic gas atmosphere furnace, and the vacuum furnace.
The IQ furnace is one of the most common types of pit type carburizing furnaces. It is also known as the "drop-bottom" furnace. The furnace heats the metal parts to a specific temperature inside a protective atmosphere. After this, the furnace quickly quenches the parts by dropping them into an oil or high-speed fan-cooled bath. The IQ furnace has many benefits during the heat treatment process, such as repeatable results, faster cycle times, and reduced distortion of parts. This is achieved because the quenching process is closely controlled.
This type of pit carburizing furnace heats metal parts within a controlled endothermic gas atmosphere. The gas atmosphere is created by passing a mixture of endothermic gas and nitrogen over heated catalyst material. The furnace is heated to a specific temperature, and metal parts are held at this temperature for the carburizing process. The endothermic gas atmosphere furnace is commonly used for low to mid-volume production of steel parts. The furnace is also widely used for carburizing applications such as hardening, carbonitriding, and neutral hardening.
The vacuum pit type carburizing furnace heats the metal parts in a low-pressure vacuum environment. This type of furnace provides a clean and controlled atmosphere for carburizing processes. Vacuum furnaces are suitable for a wide range of applications, including gas carburizing, carbonitriding, and high-pressure gas quenching. One of the major benefits of the vacuum furnace is that it minimizes oxidation and distortion of the parts being treated. Vacuum carburizing provides precise control over the carburizing process and achieves uniform case hardening.
The specifications of a pit carburizing furnace depend on the customer's needs and the manufacturer's design. These are some common specifications
Carburizing furnaces are available in different sizes and capacities to meet various heat treatment needs. Their capacities are measured in pounds and dimensions in inches, which are determined by the maximum workpiece size and the number of workpieces to be processed.
The furnace provides a maximum operating temperature and temperature uniformity. For example, the maximum operating temperature of a pit carburizing furnace is about 1700°F (927°C). The temperature uniformity is usually around 10° F (5.6°C).
The pit carburizing furnace usually works with natural gas or propane. The gas flow rate and pressure are also important specifications.
The furnace has high thermal efficiency and low energy consumption. The heating power is an important parameter to measure energy efficiency.
Proper maintenance can help prolong the service life of carburizing furnaces and reduce downtime. The following maintenance tips are helpful.
Periodically check the integrity of the furnace body, such as the lining, bricks, insulation materials, etc. There should be no cracks, damage, etc., to ensure the integrity of the furnace body and the insulation performance.
Regularly clean the furnace interior and remove carbon deposition, ash, etc. This reduces the risk of contamination of the workpiece or damage to the furnace.
Regularly check the heating system of the furnace, such as heating elements, burners, etc. Ensure that they are working properly and can provide stable temperature control and heating power.
Regularly calibrate and check the temperature control system, such as thermocouples, temperature controllers, etc. Ensure that the temperature detection and control are accurate and reliable.
For the parts that need to move in the operation of the carburizing furnace, such as the door, the lifting mechanism, etc., regular lubrication and maintenance are required to ensure smooth operation.
Pay attention to the safety protection of the furnace, such as the gas leakage protection, the furnace over-temperature alarm, etc., and regularly test and check to ensure the safety and reliability of the furnace.
Carburizing furnaces have a wide variety of applications in different industries. Some of the common usage scenarios include the following:
In the automotive industry, pit type carburizing furnaces are used for hardening various components of vehicles, such as gears, shafts, and bearings. The carburizing furnace can enhance the strength, durability, and wear resistance of these components, thereby improving the overall performance and longevity of the vehicles.
In the aerospace industry, the carburizing furnace can be used to heat treat and carburize aerospace parts and components, such as turbine blades, landing gear, and structural elements. This process enhances the high-temperature strength and corrosion resistance of these parts, making them suitable for demanding aerospace applications.
In the energy industry, the carburizing furnace can be used to treat components used in power generation, such as turbine parts and boiler tubes. The carburizing process can improve the components' ability to withstand high temperatures and pressure, thereby enhancing the efficiency and safety of power generation systems.
In the bearing industry, a carburizing furnace can be used to harden bearing rings and other bearing components. The carburizing process creates a hard surface layer on the bearings, which improves their load-bearing capacity and resistance to wear, extending the bearing's service life.
In the medical industry, the carburizing furnace can be used to manufacture surgical instruments, implants, and other medical devices. The carburizing process can improve the devices' surface hardness and biocompatibility, thereby enhancing their durability and performance in medical applications.
When selecting a pit type carburizing furnace, several factors should be considered to ensure it meets specific heat treatment requirements.
Ensure the furnace's workload capacity can accommodate the required volume of workpieces, based on batch size and production demand.
Evaluate the furnace's heating rate and temperature uniformity to ensure consistent heat treatment performance across all workpieces.
Determine the type of atmosphere control system (e.g., endothermic gas generator) used by the furnace to maintain the required carburizing atmosphere and gas flow.
Evaluate the furnace's cooling method (e.g., quenching oil or gas) and speed to ensure it can achieve the desired hardness and microstructure of the workpieces after carburizing.
Select a furnace with energy-saving features, such as insulation materials and automatic power-off function, to improve energy efficiency and reduce operating costs.
Choose a furnace with advanced automation and control systems to improve process repeatability and operator and safety productivity, such as programmable logic controllers (PLCs) and human-machine interfaces (HMIs).
Consider the furnace's maintenance requirements and availability of manufacturer support for spare parts, technical assistance, and service to ensure long-term reliable operation.
Consider the initial investment cost of the furnace, as well as its long-term value in terms of performance, quality, and operational efficiency, and conduct a comprehensive cost-benefit analysis.
Q1: What are the benefits of carburizing in a pit type carburizing furnace?
A1: The most important benefit of pit furnace carburizing is the increased durability and lifespan of the metal. Carburized steel is more robust and can withstand harsh conditions. Another advantage is the cost-effectiveness of the furnace. When compared to other types of carburizing furnaces, this furnace is more cost-effective.
Q2: What is the difference between a carburizing furnace and a hardening furnace?
A2: The main difference between a carburizing furnace and a hardening furnace is the type of process that is used. Carburizing furnaces are used to add carbon to the surface of the metal, which makes it harder. On the other hand, hardening furnaces are used to heat the metal to a specific temperature and then cool it rapidly so that the metal can achieve a specific hardness level. In general, carburizing is done at lower temperatures than hardening, and it involves heating the metal for a longer period.
Q3: How does a pit type carburizing furnace work?
A3: The process of carburizing in a pit furnace involves preheating the furnace, placing the workpieces in the furnace, and then introducing the carburizing compound into the furnace. The furnace is then closed so that the carburizing process can take place. The furnace is then opened once the carburizing process is complete, and the workpieces are then quenched and tempered as necessary.
浙公网安备 33010002000092号
浙B2-20120091-4