The heat treatment process has a critical impact on high strength fasteners, especially its intrinsic quality. Therefore, in order to produce high-quality high-strength fasteners, advanced heat treatment processes and heat treatment process control are required.
The heat treatment can ensure that the high-strength fasteners have the required mechanical strength, good plasticity, toughness and low notch sensitivity, high bending strength, and avoid the occurrence of slack and other comprehensive mechanical properties and performance. The quality and reliability of fasteners enhance the market competitiveness of fastener products.
The heat treatment process is characterized by varying the internal structure of the material to achieve the desired properties and qualities of the various fasteners, which typically do not change the shape of the material or fastener. Since the quality characteristics of the products imparted by the heat treatment are often unintuitive internal qualities (such as tensile strength, section shrinkage, elongation, etc.), in order to ensure the quality of the heat treatment, it is generally necessary to use fasteners for special equipment. Or with the furnace sample for testing, but due to the inspection sampling rate and inspection site restrictions, for each type of fasteners or even each heat of the fasteners, the inspection is partial or individual, very It is difficult to detect 100% of the heat treatment quality. Therefore, all test results do not fully reflect the heat treatment quality of the entire batch of fasteners or the entire fastener.
Since the heat treatment is produced according to the batch quantity or continuous production of the furnace, once the quality of the heat treatment occurs, the loss is lost. In the event of a heat treatment defect, a serious mechanical failure is likely to occur, resulting in an incalculable loss. Therefore, strict control of the entire process of heat treatment production, the implementation of comprehensive quality management is particularly important for the heat treatment process. The ISO9000 series certification work in the fastener industry has special significance and has received widespread attention. Heat treatment production is inseparable from other production processes, which are inseparable from the four elements of Man, Machine, Material, and Method. (Man, Machine, Material, Method, 4M for short), here are not considered environmental protection, they are the main factors affecting the quality of heat treatment products. Mutual influence and mutual restraint ultimately determine the quality of fastener heat treatment.
Referring to the ISO9000:2000 version of the standard requirements, the main points of heat treatment 4M management are analyzed and corresponding control measures are proposed to ensure the quality of fastener heat treatment.
1. Participants (persons)
The departments involved in heat treatment production generally include equipment maintenance department, tooling management department, measurement management department and procurement supply department, as well as production, technology and inspection departments (including metallographic inspection). In order to control the quality of heat-treated products, all members of the department must be mobilized and full participation must be implemented. Quality control is process control, not just relying on a few people or several departments to do it. In order to achieve full participation in the quality control of fastener heat treatment. First of all, it is necessary to clarify the responsibilities and authorities of all types of personnel, and at the same time stipulate that employees must assume responsibility for solving problems when exercising their rights. Second, companies must organize job training in a planned manner, improve their operational skills and quality control skills, and qualify for important positions (such as high-frequency induction heating). Heat treatment production is very professional, and employees only have sufficient knowledge, skills and experience to be competent and fully engaged. Secondly, it is necessary to carry out various forms of quality awareness, communication awareness, professional ethics and professionalism education, improve the quality of employees, promote mutual learning and mutual learning, and jointly improve the quality of fastener heat treatment. In addition, enterprises must actively create conditions to motivate employees to innovate and achieve continuous improvement.
2, equipment tooling (machine)
There are many types of heat treatment production equipment, and some sophisticated measuring instruments are often used to provide equipment, tooling, and metering guarantee. The reproducibility and reliability of the heat treatment process are based on the guarantee of the heat treatment quality of the fasteners. Security considerations. Operators are required to strictly abide by the operating procedures of equipment tooling gauges and implement civilized operation and maintenance. The maintenance personnel of the heat treatment equipment should do the routine maintenance and regular maintenance work of the equipment, and carry out the improvement maintenance of the equipment in a timely manner, strictly implement the management system of the tooling station equipment, and require the operator to correctly use the tooling according to the system and process requirements and return it in time. The tooling management department is required to do the work of disbursing, storing, maintaining and verifying, adjusting, repairing and replacing the tooling. Strictly implement the measurement management system, requiring operators to correctly use maintenance and measurement instruments in accordance with the quality requirements of the system and fastener heat treatment, and require the measurement department to do the calibration, maintenance and appraisal of the measurement instruments according to the regulations. Because sometimes the temperature control instrument A little bit of error will affect the operator's judgment.
Today, China's fastener industry is facing a promising market prospect and is a period of vigorous development. What we should do when we are grateful for the opportunity is to improve our own quality and improve the production technology and management level of high-strength fastener heat treatment by working hard to bring us the era and the times. Opportunity.
The heat treatment can ensure that the high-strength fasteners have the required mechanical strength, good plasticity, toughness and low notch sensitivity, high bending strength, and avoid the occurrence of slack and other comprehensive mechanical properties and performance. The quality and reliability of fasteners enhance the market competitiveness of fastener products.
The heat treatment process is characterized by varying the internal structure of the material to achieve the desired properties and qualities of the various fasteners, which typically do not change the shape of the material or fastener. Since the quality characteristics of the products imparted by the heat treatment are often unintuitive internal qualities (such as tensile strength, section shrinkage, elongation, etc.), in order to ensure the quality of the heat treatment, it is generally necessary to use fasteners for special equipment. Or with the furnace sample for testing, but due to the inspection sampling rate and inspection site restrictions, for each type of fasteners or even each heat of the fasteners, the inspection is partial or individual, very It is difficult to detect 100% of the heat treatment quality. Therefore, all test results do not fully reflect the heat treatment quality of the entire batch of fasteners or the entire fastener.
Since the heat treatment is produced according to the batch quantity or continuous production of the furnace, once the quality of the heat treatment occurs, the loss is lost. In the event of a heat treatment defect, a serious mechanical failure is likely to occur, resulting in an incalculable loss. Therefore, strict control of the entire process of heat treatment production, the implementation of comprehensive quality management is particularly important for the heat treatment process. The ISO9000 series certification work in the fastener industry has special significance and has received widespread attention. Heat treatment production is inseparable from other production processes, which are inseparable from the four elements of Man, Machine, Material, and Method. (Man, Machine, Material, Method, 4M for short), here are not considered environmental protection, they are the main factors affecting the quality of heat treatment products. Mutual influence and mutual restraint ultimately determine the quality of fastener heat treatment.
Referring to the ISO9000:2000 version of the standard requirements, the main points of heat treatment 4M management are analyzed and corresponding control measures are proposed to ensure the quality of fastener heat treatment.
1. Participants (persons)
The departments involved in heat treatment production generally include equipment maintenance department, tooling management department, measurement management department and procurement supply department, as well as production, technology and inspection departments (including metallographic inspection). In order to control the quality of heat-treated products, all members of the department must be mobilized and full participation must be implemented. Quality control is process control, not just relying on a few people or several departments to do it. In order to achieve full participation in the quality control of fastener heat treatment. First of all, it is necessary to clarify the responsibilities and authorities of all types of personnel, and at the same time stipulate that employees must assume responsibility for solving problems when exercising their rights. Second, companies must organize job training in a planned manner, improve their operational skills and quality control skills, and qualify for important positions (such as high-frequency induction heating). Heat treatment production is very professional, and employees only have sufficient knowledge, skills and experience to be competent and fully engaged. Secondly, it is necessary to carry out various forms of quality awareness, communication awareness, professional ethics and professionalism education, improve the quality of employees, promote mutual learning and mutual learning, and jointly improve the quality of fastener heat treatment. In addition, enterprises must actively create conditions to motivate employees to innovate and achieve continuous improvement.
2, equipment tooling (machine)
There are many types of heat treatment production equipment, and some sophisticated measuring instruments are often used to provide equipment, tooling, and metering guarantee. The reproducibility and reliability of the heat treatment process are based on the guarantee of the heat treatment quality of the fasteners. Security considerations. Operators are required to strictly abide by the operating procedures of equipment tooling gauges and implement civilized operation and maintenance. The maintenance personnel of the heat treatment equipment should do the routine maintenance and regular maintenance work of the equipment, and carry out the improvement maintenance of the equipment in a timely manner, strictly implement the management system of the tooling station equipment, and require the operator to correctly use the tooling according to the system and process requirements and return it in time. The tooling management department is required to do the work of disbursing, storing, maintaining and verifying, adjusting, repairing and replacing the tooling. Strictly implement the measurement management system, requiring operators to correctly use maintenance and measurement instruments in accordance with the quality requirements of the system and fastener heat treatment, and require the measurement department to do the calibration, maintenance and appraisal of the measurement instruments according to the regulations. Because sometimes the temperature control instrument A little bit of error will affect the operator's judgment.
Today, China's fastener industry is facing a promising market prospect and is a period of vigorous development. What we should do when we are grateful for the opportunity is to improve our own quality and improve the production technology and management level of high-strength fastener heat treatment by working hard to bring us the era and the times. Opportunity.
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