T/NJZZ 01-2022 Steel plough general technical specification

Scope

Main technical content: Technical requirements: 1. To adapt to the diversity of steel hoe types and specifications, and from a practical perspective, the standard sets requirements for basic dimensional deviations and quality deviations of steel hoes, and provides reference values for the dimensions of conventional products, greatly expanding the scope of application of the standard. The standard name is changed from *Steel Hoe* to *General Technical Conditions for Steel Hoes*. 2. Referencing the frameworks of standards such as *QB/T 2095-1995 Steel Shovel*, *NY/T 380-1999 Quality Grading of Mechanical Steel Shovels*, *NY/T 379-1999 Mechanical Steel Shovels*, and *QB/T 2290-1997 Steel Pickaxe*, and combining the characteristics of steel hoes, the standard clarifies the requirements for appearance quality. 3. To ensure the quality of steel hoes, based on the actual production of various enterprises, it is specified that the hardening area should be no less than half of the hoe body length (applicable to hardened steel hoes). By analyzing comprehensive testing data, the hardness of ordinary steel hoes is determined to be (20-40) HRC, and the hardness of high-strength steel hoes is determined to be (41-50) HRC. Under specified conditions, the impact test should not result in cracking or deformation.

Development Information

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