Thermal treatment process for automobile engine checking tool
A technology of automobile engine and process, applied in the field of automobile parts, can solve the problems of low hardness, splashing, difficult to bear metal blocks, etc.
Inactive Publication Date: 2019-06-07
安徽雅思达汽车装备制造有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide a heat treatment process for automobile engine inspection tools to solve the problem that the current automobile engine metal sheath proposed in the above background technology has low hardness and is difficult to withstand the splash of metal blocks when the cylinder bursts during the inspection process of the automobile engine. the impact of
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[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0022] The invention provides a technical solution: a heat treatment process for automobile engine inspection fixtures, which is used for, please refer to figure 1 , the specific steps of the process of the process are as follows:
[0023] S1: Quenching, the quenching temperature is 850°C, and the holding time is 25min; the hardness can be obtained between 51 and 53HRC,
[0024] S2: Tempering, the tempering temperature is 560°C, and the holding time is 1h. Si...
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The invention belongs to the technical field of automobile parts, and specifically discloses a thermal treatment process for an automobile engine checking tool. The thermal treatment process comprisesthe following specific steps: S1, quenching, wherein a quenching temperature is 850 DEG C, and a heat preservation period lasts for 25 minutes; S2, tempering, wherein a tempering temperature is 560 DEG C and a heat preservation period lasts for one hour; S3, stress-relief annealing, wherein an annealing temperature is 550 DEG C and a heat preservation period lasts for 2.5 hours; S4, high-frequency quenching, wherein a quenching temperature is 860-930 DEG C and a heat preservation period lasts for 1.5 hours; and S5, low-temperature tempering, wherein a tempering temperature is 160 DEG C, and aheat preservation period lasts for 1.5 hours. A processed workpiece is sequentially subjected to quenching, tempering, stress-relief annealing, high-frequency quenching and low-temperature tempering,so that sorbite with hardness of 51-53 HRC and a stable structure is formed on the surface of the workpiece, and therefore, the problems that an existing automobile engine metal sheath is relativelylow in hardness, and has difficulty in bearing impact force of metal block splashing when a gas cylinder bursts in an automobile engine detecting process are avoided.
Description
technical field [0001] The disclosure of the invention belongs to the technical field of auto parts, in particular to a heat treatment process for an auto engine inspection tool. Background technique [0002] The car engine is the machine that provides power for the car, and it is the heart of the car, which affects the power, economy and environmental protection of the car. According to different power sources, automobile engines can be divided into diesel engines, gasoline engines, electric vehicle motors, and hybrid power, etc. Common gasoline engines and diesel engines are reciprocating piston internal combustion engines, which convert the chemical energy of fuel into mechanical energy of piston movement and transmit it to the outside world. output power. The gasoline engine has high speed, low mass, low noise, easy starting, and low manufacturing cost; the diesel engine has a large compression ratio, high thermal efficiency, and better economic performance and emission...
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Login to View More IPC IPC(8): C21D9/00C21D1/18
Inventor 张培凤吴耀峰张友山
Owner 安徽雅思达汽车装备制造有限公司