Low-Temperature Brittleness of Fastening System Materials and Safety of Service in Cold Regions
Q1: Why does low temperature increase clip brittleness?
A1: Low temperature reduces steel toughness, raises yield strength, lowers impact absorption, making brittle fracture more likely under severe impact.
Q2: What special requirements apply to clip materials in cold regions?
A2: Requires excellent low-temperature impact toughness to avoid brittle failure even at -40℃ or below and maintain stable fatigue performance.
Q3: What problems occur with plastic gauge blocks at low temperatures?
A3: Ordinary plastics harden and become brittle, with reduced impact resistance, easily chipping or cracking and losing support function.
Q4: Does low temperature affect bolt fastening performance?
A4: Yes. Low temperature causes material shrinkage, changes thread fit, reduces torque retention, and increases brittleness and fracture risk.
Q5: What fastener considerations apply to cold-region operation?
A5: Use cold-resistant special components; fully inspect torque before winter; focus on cracked or damaged parts; avoid forced knocking during installation in low temperatures.